diff options
Diffstat (limited to 'src/mem')
| -rw-r--r-- | src/mem/cache/base_cache.cc | 3 | ||||
| -rw-r--r-- | src/mem/dram.cc | 2746 | ||||
| -rw-r--r-- | src/mem/dram.hh | 172 | ||||
| -rw-r--r-- | src/mem/packet.hh | 2 | ||||
| -rw-r--r-- | src/mem/physical.cc | 78 | ||||
| -rw-r--r-- | src/mem/physical.hh | 27 |
6 files changed, 2980 insertions, 48 deletions
diff --git a/src/mem/cache/base_cache.cc b/src/mem/cache/base_cache.cc index 8978fef02..a172847df 100644 --- a/src/mem/cache/base_cache.cc +++ b/src/mem/cache/base_cache.cc @@ -200,8 +200,7 @@ BaseCache::CacheEvent::process() } //Response //Know the packet to send, no need to mark in service (must succed) - bool success = cachePort->sendTiming(pkt); - assert(success); + assert(cachePort->sendTiming(pkt)); } const char * diff --git a/src/mem/dram.cc b/src/mem/dram.cc new file mode 100644 index 000000000..d7b955975 --- /dev/null +++ b/src/mem/dram.cc @@ -0,0 +1,2746 @@ +/* + * Copyright (c) 2004 The Regents of The University of Michigan + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer; + * redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution; + * neither the name of the copyright holders nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * Authors: Ali Saidi + * Ron Dreslinski + */ + +/* + Copyright (c) 2000 Computer Engineering and Communication Networks Lab (TIK) + Swiss Federal Institute of Technology (ETH) Zurich, Switzerland + + All rights reserved. + Permission is hereby granted, without written agreement and without + license or royalty fees, to use, copy, modify, and distribute this + software and its documentation for any purpose, provided that the above + copyright notice and the following two paragraphs appear in all copies + of this software. + + IN NO EVENT SHALL THE TIK OR THE ETH ZURICH BE LIABLE TO ANY PARTY + FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES + ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF + THE TIK OR THE ETH ZURICH HAVE BEEN ADVISED OF THE POSSIBILITY OF + SUCH DAMAGE. + + THE TIK AND THE ETH ZURICH SPECIFICALLY DISCLAIM ANY WARRANTIES, + INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE + PROVIDED HEREUNDER IS ON AN "AS IS" BASIS, AND TIK AND THE ETH ZURICH + HAVE NO OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, + ENHANCEMENTS, OR MODIFICATIONS. +*/ + +/* authors: Andreas Romer 4/99 - 7/99 + Matthias Gries 4/99 - 2/01 + + +References: http://www.tik.ee.ethz.ch/ +====================================== +-> Publications http://www.tik.ee.ethz.ch/db/tik/publications/form_search_publications.php3 + + +Matthias Gries: A Survey of Synchronous RAM Architectures. +TIK Report Nr. 71, Computer Engineering and Networks Lab (TIK), +Swiss Federal Institute of Technology (ETH) Zurich, April, 1999 + +-> DRAM survey + + +Matthias Gries, Andreas Romer: Performance Evaluation of Recent +DRAM Architectures for Embedded Systems. +TIK Report Nr. 82, Computer Engineering and Networks Lab (TIK), +Swiss Federal Institute of Technology (ETH) Zurich, November, 1999. + +-> description of the DRAM and controller models for SimpleScalar in the appendix +(note that the current software version additionally supports overlapping in + closed-page mode with slightly modified timing) + + +Matthias Gries: The Impact of Recent DRAM Architectures on Embedded Systems Performance. +Euromicro2000, Symposium on Digital Systems Design, IEEE Computer, Maastricht, Netherlands, +Vol. 1, pages 282-289, September, 2000. + +-> performance study with SimpleScalar + + +Matthias Gries: Modeling a Memory Subsystem with Petri Nets: a Case Study. +A. Yakovlev, L. Gomes, and L. Lavagno (Eds), Hardware Design and Petri Nets, +Kluwer Academic, pages 291-310, March, 2000. + +-> SDRAM + controller performance model as a high-level Petri net +*/ + +/** + * @file + * Definition of a DRAM like main memory. + */ + + +#include "mem/dram.hh" +#include "sim/builder.hh" + +#include <string> + +extern int maxThreadsPerCPU; + +/* SDRAM system: PC100/PC133 2-2-2 DIMM timing according to + PC SDRAM Specification, Rev. 1.7, Intel Corp, Nov. 1999. + + 64 bit DIMM consists of four 16x organized 256 Mbit SDRAMs, 128 MByte of main memory in total.*/ +/* the settings above must be changed if another memory is used */ +/* DRDRAM system: 16 bit channel, four chips (single RIMM), 128 MByte of main memory in total. + Timing: Rambus Inc, Direct RDRAM, preliminary information, 256/288Mbit: 40-800 timing */ + + +#define DR_STACK_BASE 0x8000000 /* total size of memory: 128 Mbyte */ +#define DR_BANK_SIZE 0x100000 /* size of a bank : 1 Mbyte */ +#define DR_ROW_SIZE 0x800 /* size of a row : 2 Kbyte */ +#define DR_NUM_BANKS (DR_STACK_BASE/DR_BANK_SIZE) /* number of banks : 128 */ +#define DR_NUM_ROWS (DR_BANK_SIZE/DR_ROW_SIZE) /* number of rows per bank: 512 */ +#define DR_DATA_BASE 0x4000000 /* Size of textsegment : 64 Mbyte */ +#define DR_NUM_BYTE_MEM 16 /* data packet capacity: 16 byte */ +#define DR_NUM_DEVS 4 /* number of devices along channel */ +#define DR_BANK_SAMP 16 /* 16 banks are together in one group in each device: bank 15 and 16 have no shared SAMPs */ +#define DR_T_PACKET 4 /* number of cycles (in 400 MHz) the memory needs to deliver a data packet */ +#define DR_T_RCD 7 /* RAS to CAS delay */ +#define DR_T_CAC 8 /* read access delay: number of cylces from read to data (trailing to leading edge of packet!) */ +#define DR_T_CWD 6 /* Write delay: number of cylces from write to write data (trailing to leading edge of packet!) */ +#define DR_T_RP 8 /* row precharge delay */ +#define DR_T_RTR 8 /* retire delay*/ +#define DR_T_RDP 4 /* min delay from read to precharge in cycles */ +#define DR_T_PP 8 /* precharge to precharge time to any bank in the same device */ +#define DR_T_RAS 20 /* minimal row active time */ +/*the settings above need to be changed if the memory is altered*/ +#define DR_DYNAMIC_SIZE (DR_STACK_BASE - DR_DATA_BASE) /* size of the heap and stack at most: 64 Mbyte */ +// #define DR_NUM_BANKS (DR_STACK_BASE/DR_BANK_SIZE) /* number of banks : 128 */ +// #define DR_NUM_ROWS (DR_BANK_SIZE/DR_ROW_SIZE) /* number of rows per bank: 512 */ +#define DR_T_OWR (DR_T_CWD + DR_T_PACKET - DR_T_RTR) /* overlap after write retire */ +#define DR_T_HELP (DR_T_CAC+DR_T_PACKET-DR_T_RDP+DR_T_PACKET) /* used for read after read with precharge */ +/*delays until data is ready/written to the memory for the DRDRAM*/ +#define DR_T_READ_READ_SROW (DR_T_CAC + DR_T_PACKET) /* RAR, row hit, current bank */ +#define DR_T_READ_WRITE_SROW (DR_T_CAC + DR_T_PACKET) /* RAW, row hit, current bank */ +#define DR_T_WRITE_READ_SROW (DR_T_CWD + DR_T_PACKET) /* WAR, row hit, current bank */ +#define DR_T_WRITE_WRITE_SROW (DR_T_CWD + DR_T_PACKET) /* WAW, row hit, current bank */ +#define DR_T_READ_READ_SBANK (DR_T_RP+DR_T_RCD+DR_T_CAC+DR_T_PACKET) /* RAR, row miss, current bank */ +#define DR_T_READ_WRITE_SBANK (DR_T_RP+DR_T_RCD+DR_T_CAC+DR_T_PACKET) /* RAW, row miss, current bank */ +#define DR_T_WRITE_READ_SBANK (DR_T_RP+DR_T_RCD+DR_T_CWD+DR_T_PACKET) /* WAR, row miss, current bank */ +#define DR_T_WRITE_WRITE_SBANK (DR_T_RP+DR_T_RCD+DR_T_CWD+DR_T_PACKET) /* WAR, row miss, current bank */ +#define DR_T_READ_READ_OBANK (DR_T_PP+DR_T_RP+DR_T_RCD+DR_T_CAC+DR_T_PACKET) /* RAR, row miss, another bank */ +#define DR_T_READ_WRITE_OBANK (DR_T_PP+DR_T_RP+DR_T_RCD+DR_T_CAC+DR_T_PACKET) /* RAW, row miss, another bank */ +#define DR_T_WRITE_READ_OBANK (DR_T_PP+DR_T_RP+DR_T_RCD+DR_T_CWD+DR_T_PACKET) /* WAR, row miss, another bank */ +#define DR_T_WRITE_WRITE_OBANK (DR_T_PP+DR_T_RP+DR_T_RCD+DR_T_CWD+DR_T_PACKET) /* WAR, row miss, another bank */ +/* best-case latencies (due to overlap / row hits in another bank) */ +#define DR_BEST_T_READ_READ_SROW 0 /* RAR, row hit, current bank */ +#define DR_BEST_T_READ_WRITE_SROW (DR_T_CAC+DR_T_PACKET-DR_T_OWR) /* RAW, row hit, current bank */ +#define DR_BEST_T_WRITE_READ_SROW 0 /* WAR, row hit, current bank */ +#define DR_BEST_T_WRITE_WRITE_SROW (DR_T_CWD+DR_T_PACKET-DR_T_OWR) /* WAR, row hit, current bank */ +#define DR_BEST_T_READ_READ_SBANK (DR_T_RCD + DR_T_CAC) /* RAR, row miss, current bank */ +#define DR_BEST_T_READ_WRITE_SBANK (DR_T_RP-DR_T_OWR+DR_T_RCD+DR_T_CAC+DR_T_PACKET) /* RAW, row miss, current bank */ +#define DR_BEST_T_WRITE_READ_SBANK (DR_T_RCD+DR_T_CWD) /* WAR, row miss, current bank */ +#define DR_BEST_T_WRITE_WRITE_SBANK (DR_T_RP-DR_T_OWR+DR_T_RCD+DR_T_CWD+DR_T_PACKET) /* WAW, row miss, current bank */ +#define DR_BEST_T_READ_READ_OBANK 0 /* RAR, row miss/hit, another bank */ +#define DR_BEST_T_READ_WRITE_OBANK (DR_T_PACKET+DR_T_CAC-DR_T_OWR) /* RAW, row miss/hit, another bank */ +#define DR_BEST_T_WRITE_READ_OBANK 0 /* WAR, row miss/hit, another bank */ +#define DR_BEST_T_WRITE_WRITE_OBANK 0 /* WAW, row miss/hit, another bank */ +#define DR_BEST_T_READ_WRITE_ODEV (DR_T_CAC-DR_T_CWD) /* RAW, row miss/hit, another device */ + + +#define MIN(a,b) ((a<b) ? a : b) +#define SD_ROW_SIZE 0x1000 /* size of a row : 4 Kbyte */ + + + +DRAMMemory::DRAMMemory(Params *p) + : PhysicalMemory(p), cpu_ratio(p->cpu_ratio), bus_width(p->bus_width), + mem_type(p->mem_type), mem_actpolicy(p->mem_actpolicy), + memctrladdr_type(p->memctrladdr_type), act_lat(p->act_lat), + cas_lat(p->cas_lat), war_lat(p->war_lat), + pre_lat(p->pre_lat), dpl_lat(p->dpl_lat), + trc_lat(p->trc_lat), num_banks(p->num_banks), + num_cpus(p->num_cpus), last_dev(DR_NUM_DEVS+1), + lastCmdIsRead(true), precharge(0), same_row_read_access(0), srr_after_read(0), + srr_after_write(0), same_row_write_access(0), srw_after_read(0), + srw_after_write(0), same_bank_read_access(0), sbr_after_read(0), + sbr_after_write(0), same_bank_write_access(0), sbw_after_read(0), + sbw_after_write(0), other_bank_read_access_hit(0), obr_after_read_hit(0), + obr_after_write_hit(0), other_bank_write_access_hit(0), + obw_after_read_hit(0), obw_after_write_hit(0), obr_after_read_miss(0), + obr_after_write_miss(0), + obw_after_read_miss(0), obw_after_write_miss(0), total_access(0), + adjacent_access(0), adjacent_read(0), adjacent_write(0), + command_overlapping(0), best_case(0), in_between_case(0), worst_case(0), + full_overlapping(0), partial_overlapping(0), mem_access_details(false), + memctrlpipe_enable(false), time_last_access(0) +{ + warn("This DRAM module has not been tested with the new memory system at all!"); + bank_size = (params()->addrRange.size() + 1) / num_banks; + num_rows = bank_size / SD_ROW_SIZE; /* 0x1000 size of row 4Kbtye */ + active_row = new int[num_banks]; + last_bank = num_banks+1; + last_row = num_rows; + busy_until = new Tick[num_banks]; + memset(busy_until,0,sizeof(Tick)*num_banks); /* initiliaze */ + +} + +void +DRAMMemory::regStats() +{ + using namespace Stats; + + accesses + .init(maxThreadsPerCPU) + .name(name() + ".accesses") + .desc("total number of accesses") + .flags(total) + ; + + bytesRequested + .init(maxThreadsPerCPU) + .name(name() + ".bytes_requested") + .desc("total number of bytes requested") + .flags(total) + ; + + bytesSent + .init(maxThreadsPerCPU) + .name(name() + ".bytes_sent") + .desc("total number of bytes sent") + .flags(total) + ; + + compressedAccesses + .init(maxThreadsPerCPU) + .name(name() + ".compressed_responses") + .desc("total number of accesses that are compressed") + .flags(total) + ; + + // stats for power modelling + cycles_nCKE + .init(1) + .name(name() + ".cycles_nCKE") + .desc("cycles when CKE is low") + .flags(total) + ; + + cycles_all_precharge_CKE + .init(1) + .name(name() + ".cycles_all_precharge_CKE") + .desc("cycles when all banks precharged") + .flags(total) + ; + + cycles_all_precharge_nCKE + .init(1) + .name(name() + ".cycles_all_precharge_nCKE") + .desc("cycles when all banks precharged and CKE is low") + .flags(total) + ; + + cycles_bank_active_nCKE + .init(1) + .name(name() + ".cycles_bank_active_nCKE") + .desc("cycles when banks active and CKE low") + .flags(total) + ; + + // we derive this from other stats later + // so DR TODO for now this counter is unused + cycles_avg_ACT + .init(1) + .name(name() + ".cycles_avg_ACT") + .desc("avg cycles between ACT commands") + .flags(total) + ; + + cycles_read_out + .init(1) + .name(name() + ".cycles_read_out") + .desc("cycles outputting read data") + .flags(total) + ; + + cycles_write_in + .init(1) + .name(name() + ".cycles_write_in") + .desc("cycles inputting write data") + .flags(total) + ; + + cycles_between_misses + .init(1) + .name(name() + ".cycles_between_misses") + .desc("cycles between open page misses") + .flags(total) + ; + + other_bank_read_access_miss + .init(1) + .name(name() + ".other_bank_read_access_miss") + .desc("read miss count") + .flags(total) + ; + + other_bank_write_access_miss + .init(1) + .name(name() + ".other_bank_write_access_miss") + .desc("write miss count") + .flags(total) + ; + + // DR TODO for now, only output stats which are involved in power equations + total_latency + .name(name() + ".total_latency") + .desc("total DRAM latency") + ; + + total_arb_latency + .name(name() + ".total_arb_latency") + .desc("total arbitration latency") + ; + + avg_latency + .name(name() + ".avg_latency") + .desc("average DRAM latency") + ; + + avg_arb_latency + .name(name() + ".avg_arb_latency") + .desc("average arbitration DRAM latency") + ; + + bank_access_profile + .init(num_banks,num_cpus) + .name(name() + "[cpu][bank]") + .desc("DRAM bank access profile") + ; + + total_icache_req + .name(name() + ".total_icache_req") + .desc("total number of requests from icache") + ; + + avg_latency = total_latency / accesses; + avg_arb_latency = total_arb_latency / accesses; +} + + + + +// DR DEBUG: assume we have a 500 MHz CPU and 100 MHz RAM +// static float cpu_ratio = 5; // ratio between CPU speed and memory bus speed +// DR TODO: get this parameter from the simulation + +static char *mem_access_output=NULL; + /* latency of access [CPU cycles]*/ +Tick +DRAMMemory::calculateLatency(Packet *pkt) +{ + + bool cmdIsRead = pkt->isRead(); + + int lat=0, temp=0, current_bank=0; + int current_row=0, current_device=0; + + int was_miss = 0; // determines if there was an active row miss this access + + //md_addr_t physic_address; /* linear memory address to be accessed */ + Addr physic_address; /* linear memory address to be accessed */ + + int num_blocks=0; + int corrected_overlap, /* overlap of consecutive accesses [CPU cycles] */ + overlap=0; /* overlap of consecutive accesses [mem bus cycles] */ + int adjacent=0; /* 1 indicates that current bank is adjacent to the last accessed one*/ + + int chunks = (pkt->getSize() + (bus_width - 1)) / bus_width; // burst length + assert(chunks >0); + physic_address = pkt->getAddr(); + + /////////////////////////////////////////////////////////////////////////// + // DR added more stats for power modelling + // NOTE: + // for DRAM closed-page, automatic precharge after read or write, + // i.e. whenever idle + + + // count number of cycles where dram is not busy, use for CKE low signal + // calculate as percentage of all clock cycles + // if busy, do not add to idle count. Else add cycles since last access +/* #define SD_NUM_BANKS (SD_STACK_BASE/SD_BANK_SIZE) */ /* number of banks */ +/* #define SD_NUM_ROWS (SD_BANK_SIZE/SD_ROW_SIZE) */ /* number of rows per bank */ +/*delays until data is ready/written to the memory for the SDRAM*/ + int SD_T_READ_READ_SROW = cas_lat; /* RAR, row hit, current bank */ + int SD_T_READ_WRITE_SROW = cas_lat; /* RAW, row hit, current bank */ + int SD_T_WRITE_READ_SROW = war_lat-1; /* WAR, row hit, current bank */ + int SD_T_WRITE_WRITE_SROW = 0; /* WAW, row hit, current bank */ + int SD_T_READ_READ_SBANK = (pre_lat+act_lat+cas_lat); /* RAR, row miss, current bank */ + int SD_T_READ_WRITE_SBANK = (pre_lat+act_lat+cas_lat+(dpl_lat-1)); /* RAW, row miss, current bank */ + int SD_T_WRITE_READ_SBANK = (pre_lat+act_lat); /* WAR, row miss, current bank */ + int SD_T_WRITE_WRITE_SBANK = (pre_lat+act_lat+(dpl_lat-1)); /* WAW, row miss, current bank */ + int SD_T_READ_READ_OBANK = (pre_lat+act_lat+cas_lat); /* RAR, row miss, another bank */ + int SD_T_READ_WRITE_OBANK = (pre_lat+act_lat+cas_lat); /* RAW, row miss, another bank */ + int SD_T_WRITE_READ_OBANK = (pre_lat+act_lat); /* WAR, row miss, another bank */ + int SD_T_WRITE_WRITE_OBANK = (pre_lat+act_lat); /* WAW, row miss, another bank */ +/* best-case latencies (due to overlap / row hits in another bank) */ + int SD_BEST_T_READ_READ_SROW = 0; /* RAR, row hit, current bank */ + int SD_BEST_T_READ_READ_SBANK = (act_lat+cas_lat); /* RAR, row miss, current bank */ + int SD_BEST_T_WRITE_READ_SBANK = (act_lat); /* WAR, row miss, current bank */ + int SD_BEST_T_READ_READ_OBANK = 0; /* RAR, row miss/hit, another bank */ + int SD_BEST_T_READ_WRITE_OBANK = cas_lat; /* RAW, row miss/hit, another bank */ + int SD_BEST_T_WRITE_READ_OBANK = (war_lat -1); /* WAR, row miss/hit, another bank */ + int SD_BEST_T_WRITE_WRITE_OBANK = 0; /* WAW, row miss/hit, another bank */ + + Tick time_since_last_access = curTick-time_last_access; + Tick time_last_miss = 0; // used for keeping track of times between activations (page misses) + //int was_idle = (curTick > busy_until); + bool srow_flag = false; + int timing_correction = 0; + + int was_idle = (curTick > busy_until[current_bank]); + cycles_nCKE[0] += was_idle ? MIN(curTick-busy_until[current_bank], time_since_last_access) : 0; + + // bank is precharged + //active_row[current_bank] == DR_NUM_ROWS + int all_precharged = 1; + int bank_max = num_banks; + int row_max = num_rows; + + if( (mem_type == "SDRAM") && (mem_actpolicy == "closed") ) { + // SDRAM does not use the active_row array in closed_page mode + // TODO: handle closed page operation + + } else { // DRDRAM uses the active_row array + for( int i = 0; i < bank_max; i++ ) { + if( (active_row[current_bank] != row_max)) all_precharged = 0; + } + } + + if(all_precharged) { + if(was_idle) { + cycles_all_precharge_nCKE[0] += MIN(curTick-busy_until[current_bank], time_since_last_access); + cycles_all_precharge_CKE[0] += MIN(0, busy_until[current_bank]-time_last_access); + } + else { + cycles_all_precharge_CKE[0] += time_since_last_access; + } + } else { // some bank is active + if(was_idle) { + cycles_bank_active_nCKE[0] += MIN(curTick-busy_until[current_bank], time_since_last_access); + } + else { + } + } + + if( cmdIsRead ) { + cycles_read_out[0] += chunks; + } else { + cycles_write_in[0] += chunks; + } + + + time_last_access = curTick; + //////////////////////////////////////////////////////////////////////////// + + if ((mem_type == "SDRAM") && (mem_actpolicy == "open")) + { + /* Split transaction on m5 makes it challenging to */ + /* model the DRAM. A single cycle latency is assumed */ + /* for dequeueing an address bus request. In response to */ + /* that, the current DRAM implementation assumes that a */ + /* seperate DRAM command generator / controller exists per */ + /* bank and the dequeued addresses are queued to these */ + /* controllers. We can view this as an ideal scenario for */ + /* a shared DRAM command generator / controller with */ + /* support for overlapping DRAM commands. */ + /* Compare DRAM PRE,ACT,CAS etc. latencies, DRAM clock */ + /* frequency and the number of banks to determine whether */ + /* the ideal scenario with a shared DRAM command generator */ + /* is equivalent to having multiple DRAM command generators */ + /* per bank */ + if ((memctrladdr_type != "interleaved"))/* i.e. mc_type is linear */ + { + current_bank=physic_address/bank_size; + temp=physic_address-current_bank*bank_size;/*address in bank*/ + current_row=temp/SD_ROW_SIZE; + } + else/* mc_type interleaved */ + /* This memory controller maps the addresses differently + * depending on the row_size, every row is mapped to another + * bank. Thus, the text segment uses half of every bank, the heap + * the next quarter of each bank, and the stack the rest. + */ + + { + num_blocks = physic_address/SD_ROW_SIZE; /* row number */ + current_bank=num_blocks%num_banks; + current_row=num_blocks/num_banks; + } + + if (mem_access_details == true) + { + // DR TODO + //fprintf(mem_accessfd," %09u %4d %3d\n",physic_address,current_row,current_bank); + } + else + { + if (mem_access_output!=0) + { + //fprintf(mem_accessfd,"\n"); + } + } + total_access++; + + if (memctrlpipe_enable == true) + { + overlap=(int)(busy_until[current_bank] - curTick); + } + else overlap = 0; + + if (cpu_ratio < 1.0) + { + corrected_overlap = overlap*((int)(1/cpu_ratio)); /* floor */ + } + else + { + corrected_overlap = (int) (overlap/cpu_ratio); + } + + /*fprintf(stderr,"%10.0f %10.0f %4d %4d ",(double)busy_until, (double)curTick, overlap, corrected_overlap); debugging*/ + + if (cmdIsRead == lastCmdIsRead)/*same command*/ + { + if (current_bank == last_bank)/*same bank*/ + { + if (current_row == last_row)/*same row*/ + { + /* Page Hit */ + if (cmdIsRead) + { + if (corrected_overlap > 0)/*overlapping*/ + { + /*best case*/ + if (corrected_overlap >= cas_lat) + { + lat=SD_BEST_T_READ_READ_SROW; + srow_flag = true; + best_case++; + full_overlapping++; + } + else/*in between case*/ + { + lat = cas_lat-corrected_overlap; + srow_flag = true; + in_between_case++; + partial_overlapping++; + } + } + else + { + /*worst case*/ + lat = SD_T_READ_READ_SROW; + srow_flag = true; + worst_case++; + } + same_row_read_access++; + srr_after_read++; + } + else/*write*/ + {/*no option case*/ + lat = SD_T_WRITE_WRITE_SROW; + srow_flag = true; + same_row_write_access++; + srw_after_write++; + worst_case++; + } + } + else /*other row in same bank*/ + { + /* Page miss */ + if (cmdIsRead) + { + if (corrected_overlap > 0)/*overlapping*/ + { + if (corrected_overlap >= pre_lat)/*best case*/ + { + lat = SD_BEST_T_READ_READ_SBANK; + best_case++; + full_overlapping++; + } + else/*in between case*/ + { + lat = SD_T_READ_READ_SBANK-corrected_overlap; + in_between_case++; + partial_overlapping++; + } + } + else/*worst case*/ + { + lat = SD_T_READ_READ_SBANK; + worst_case++; + } + same_bank_read_access++; + sbr_after_read++; + } + else/*write*/ + {/*no option case*/ + lat = SD_T_WRITE_WRITE_SBANK; + same_bank_write_access++; + sbw_after_write++; + worst_case++; + } + } + } + else /*other bank*/ + { + if (cmdIsRead) + { + /* Page empty */ + if (current_row == active_row[current_bank])/*row is still active*/ + { + if (corrected_overlap > 0 )/*overlapping*/ + { + if(corrected_overlap >= pre_lat)/*best case*/ + { + lat = SD_BEST_T_READ_READ_OBANK; + best_case++; + full_overlapping++; + } + else/*in between case*/ + { + lat = SD_T_READ_READ_OBANK - corrected_overlap; + in_between_case++; + partial_overlapping++; + } + } + else/*in between case*/ + { + lat = SD_T_READ_READ_OBANK; + in_between_case++; + } + other_bank_read_access_hit++; + obr_after_read_hit++; + } + else/*row is not active*/ + { + if (corrected_overlap > 0 )/*overlapping*/ + { + if(corrected_overlap >= SD_T_READ_READ_OBANK )/*best case*/ + { + lat = SD_BEST_T_READ_READ_OBANK; + best_case++; + full_overlapping++; + } + else/*in between case*/ + { + lat = SD_T_READ_READ_OBANK-corrected_overlap; + in_between_case++; + partial_overlapping++; + } + } + else/*worst case*/ + { + lat = SD_T_READ_READ_OBANK; + worst_case++; + } + + // DR keep track of time between misses + was_miss = 1; + + other_bank_read_access_miss[0]++; + obr_after_read_miss++; + } + } + else/*write*/ + { + if (current_row == active_row[current_bank])/*row is still active*/ + { /*best_case*/ + lat = SD_BEST_T_WRITE_WRITE_OBANK; + best_case++; + other_bank_write_access_hit++; + obw_after_write_hit++; + } + else/*row is not active*/ + { + if (corrected_overlap > 0 )/*overlapping*/ + { + if(corrected_overlap >=SD_T_WRITE_WRITE_OBANK)/*best case*/ + { + lat = SD_BEST_T_WRITE_WRITE_OBANK; + best_case++; + full_overlapping++; + } + else/*in between case*/ + { + lat = SD_T_WRITE_WRITE_OBANK-corrected_overlap; + in_between_case++; + partial_overlapping++; + } + } + else/*worst case*/ + { + lat = SD_T_WRITE_WRITE_OBANK; + worst_case++; + } + + // DR keep track of time between misses + was_miss = 1; + + other_bank_write_access_miss[0]++; + obw_after_write_miss++; + + } + } + } + } + else /*lastCmdIsRead != cmdIsRead*/ + { + if (current_bank == last_bank)/*same bank*/ + { + if (current_row == last_row)/*same row*/ + { + /* Page Hit */ + if (cmdIsRead) + {/*worst case*/ + lat = SD_T_READ_WRITE_SROW; + srow_flag = true; + same_row_read_access++; + srr_after_write++; + worst_case++; + } + else/*write*/ + {/*worst case*/ + lat = SD_T_WRITE_READ_SROW; + srow_flag = true; + same_row_write_access++; + srw_after_read++; + worst_case++; + } + } + else /*other row in same bank*/ + { + /* Page Miss */ + if (cmdIsRead) + {/*worst case*/ + lat = SD_T_READ_WRITE_SBANK; + same_bank_read_access++; + sbr_after_write++; + worst_case++; + } + else/*write*/ + { + if (corrected_overlap > 0 )/*overlapping*/ + { + if (corrected_overlap >= pre_lat)/*best case*/ + { + lat = SD_BEST_T_WRITE_READ_SBANK; + best_case++; + full_overlapping++; + } + else/*in between case*/ + { + lat = SD_T_WRITE_READ_SBANK-corrected_overlap; + in_between_case++; + partial_overlapping++; + } + } + else/*worst case*/ + { + lat = SD_T_WRITE_READ_OBANK; + worst_case++; + } + same_bank_write_access++; + sbw_after_read++; + } + } + } + else /*other bank*/ + { + /* Page empty */ + if (cmdIsRead) + { + if (current_row == active_row[current_bank])/*row is still active*/ + { /*best case*/ + lat = SD_BEST_T_READ_WRITE_OBANK; + best_case++; + other_bank_read_access_hit++; + obr_after_write_hit++; + } + else/*row is not active*/ + { + if (corrected_overlap > 0 )/*overlapping*/ + { + if(corrected_overlap >= (pre_lat+act_lat))/*best case*/ + { + lat = SD_BEST_T_READ_WRITE_OBANK; + best_case++; + full_overlapping++; + } + else/*in between case*/ + { + lat = SD_T_READ_WRITE_OBANK-corrected_overlap; + in_between_case++; + partial_overlapping++; + } + } + else/*worst case*/ + { + lat = SD_T_READ_WRITE_OBANK; + worst_case++; + } + // DR keep track of time between misses + was_miss = 1; + + other_bank_read_access_miss[0]++; + obr_after_write_miss++; + } + } + else/*write*/ + { + if (current_row == active_row[current_bank])/*row is still active*/ + { /*best case*/ + lat = SD_BEST_T_WRITE_READ_OBANK; + best_case++; + other_bank_write_access_hit++; + obw_after_read_hit++; + } + else/*row is not active*/ + { + if (corrected_overlap > 0 )/*overlapping*/ + { + if (corrected_overlap >= (SD_T_WRITE_READ_OBANK-SD_BEST_T_WRITE_READ_OBANK))/*best case*/ + {/*best case*/ + lat = SD_BEST_T_WRITE_READ_OBANK; + best_case++; + full_overlapping++; + } + else/*in between case*/ + { + lat = SD_T_WRITE_READ_OBANK-corrected_overlap; + in_between_case++; + partial_overlapping++; + } + } + else/*worst case*/ + { + lat = SD_T_WRITE_READ_OBANK; + worst_case++; + } + + // DR keep track of time between misses + was_miss = 1; + + other_bank_write_access_miss[0]++; + obw_after_read_miss++; + } + } + } + } + /*fprintf(stderr,"%4d %4d ",lat,active_row[current_bank]);debugging*/ + + lat += chunks; /* burst length added*/ + if(srow_flag == false) + timing_correction = cpu_ratio*(trc_lat - pre_lat - act_lat - cas_lat - 1); + + + /*fprintf(stderr,"%4d ",lat);debugging*/ + + active_row[current_bank]=current_row; /* open-page (hit) register */ + lastCmdIsRead = cmdIsRead; + last_bank = current_bank; + last_row = current_row; + + if (cpu_ratio < 1.0) + { + lat = (lat+((int)(1/cpu_ratio)-1))/(int)(1/cpu_ratio); + } + else + { + temp = (int)(lat*cpu_ratio); + lat = (lat*cpu_ratio == temp)?temp:(temp+1); /*round up*/ + } + + /*fprintf(stderr,"%4d \n",lat);debugging*/ + + if (overlap <= 0) /*memory interface is not busy*/ + { + if (memctrlpipe_enable == true) + { + busy_until[current_bank]=curTick+lat+ + timing_correction; + } + else + { + if (busy_until[current_bank] >= curTick) + { + busy_until[current_bank]+=(lat+ + timing_correction); + total_arb_latency += (busy_until[current_bank] + - curTick - lat + - timing_correction); + lat=busy_until[current_bank] - curTick; + } + else busy_until[current_bank]=curTick+lat+ + timing_correction; + } + } + else/*the memory request will be satisfied temp cycles after curTick*/ + { + busy_until[current_bank] +=(lat+ + timing_correction); + command_overlapping++; + lat+=overlap; + total_arb_latency += overlap; + } + + // DR for power stats + if( was_miss ) { + cycles_between_misses[0] += (busy_until[current_bank] - time_last_miss); + time_last_miss = busy_until[current_bank]; + } + // cout <<"cpu id = " << _cpu_num << "current_bank = " << current_bank << endl; + // if((_cpu_num < num_cpus) && (_cpu_num >= 0)) + // bank_access_profile[_cpu_num][current_bank]++; + + return lat; + } + + + /***********************************************************/ + /******************** DRDRAM ***********************/ + /***********************************************************/ + + else if ((mem_type == "DRDRAM") && (mem_actpolicy == "open"))/*DRDRAM*/ /*a closed bank has an activ_row number of DR_NUM_ROWS: highest +1*/ + { + if ((memctrladdr_type != "interleaved"))/* i.e. mc_type is linear */ + { + current_bank=physic_address/DR_BANK_SIZE; + temp=physic_address-current_bank*DR_BANK_SIZE;/*address in bank*/ + current_row=temp/DR_ROW_SIZE; + current_device=current_bank/(DR_NUM_BANKS/DR_NUM_DEVS); + } + + else/*mc_type interleaved*/ + /* This memory controller maps the addresses differently + * depending on the row-size, every row is mapped to another + * bank. So the text segment uses half of every bank. The heap + * the next quarter of each bank and the stack the rest. + */ + + { + num_blocks = physic_address/DR_ROW_SIZE; /* row number */ + current_bank=(num_blocks%DR_NUM_BANKS)*2; /*every 'second' bank will be used*/ + /*banks above DR_NUM_BANKS are the uneven banks*/ + current_bank = ((current_bank < DR_NUM_BANKS) ? current_bank:(current_bank - DR_NUM_BANKS+1)); + current_row=num_blocks/DR_NUM_BANKS; + current_device=current_bank/(DR_NUM_BANKS/DR_NUM_DEVS); + } + if (abs(current_bank-last_bank)==1)/*access to an adjacent bank*/ + { + if (!((current_bank%DR_BANK_SAMP == (DR_BANK_SAMP-1))&&(last_bank%DR_BANK_SAMP == 0))/*not 15/16 (current/last)*/ + &&(!((last_bank%DR_BANK_SAMP == (DR_BANK_SAMP-1))&&(current_bank%DR_BANK_SAMP == 0))))/*not 16/15(current/last)*/ + { + adjacent_access++; + adjacent=1;/*an adjacent bank is accessed*/ + if (cmdIsRead) + adjacent_read++; + else + adjacent_write++; + } + } + precharge=0;/*at this moment no bank needs to be precharged*/ + if (active_row[current_bank] == DR_NUM_ROWS)/*bank is precharged*/ + { + if (prechargeBanksAround(current_bank)> 0)/*a bank next to the current is activated*/ + { + if ((adjacent==1)&&(precharge==1)) + { + /*since adjacent banks share SAMPs, this access would be the same as (in terms of latency) + *an access to another row in the same bank if only one adjacent bank was active*/ + last_bank = current_bank; + last_row = current_row+1; + precharge=0;/*set to 0 for next memory access*/ + } + } + } + if (mem_access_details == true) + { + //fprintf(mem_accessfd," %09u %4d %3d %15d\n",physic_address,current_row,current_bank,(int)adjacent_access); + } + else + { + if (mem_access_output!=NULL) + { + //fprintf(mem_accessfd,"\n"); + } + } + total_access++; + + if (memctrlpipe_enable == true) + { + overlap=(int)(busy_until[current_bank] - curTick); + } + else overlap=0; + + if (cpu_ratio < 1.0) + { + corrected_overlap = overlap*((int)(1/cpu_ratio)); /* floor */ + } + else + { + corrected_overlap = (int) (overlap/cpu_ratio); + } + + /*fprintf(stderr,"%10.0f %10.0f %6d %6d %2d %2d ",(double)busy_until, (double)curTick, overlap, corrected_overlap,precharge,adjacent);debugging*/ + + if (cmdIsRead == lastCmdIsRead)/*same command*/ + { + if (current_bank == last_bank)/*same bank*/ + { + if (current_row == last_row)/*same row*/ + { + if (cmdIsRead) + { + if (corrected_overlap > 0)/*overlapping*/ + { + /*best case*/ + if (corrected_overlap >= DR_T_READ_READ_SROW) + { + lat=DR_BEST_T_READ_READ_SROW; + srow_flag = true; + best_case++; + full_overlapping++; + } + else/*in between case*/ + { + lat = DR_T_READ_READ_SROW-corrected_overlap; + srow_flag = true; + in_between_case++; + partial_overlapping++; + } + } + else + { + /*worst case*/ + lat = DR_T_READ_READ_SROW; + srow_flag = true; + worst_case++; + } + same_row_read_access++; + srr_after_read++; + } + else/*write, always retire the previous data*/ + { + if (corrected_overlap > 0)/*overlapping*/ + { + /*best case*/ + if (corrected_overlap >= DR_T_OWR) + { + lat=DR_BEST_T_WRITE_WRITE_SROW; + srow_flag = true; + best_case++; + full_overlapping++; + } + else/*in between case*/ + { + lat = DR_T_WRITE_WRITE_SROW-corrected_overlap; + srow_flag = true; + in_between_case++; + partial_overlapping++; + } + } + else + { + /*worst case*/ + lat = DR_T_WRITE_WRITE_SROW; + srow_flag = true; + worst_case++; + } + same_row_write_access++; + srw_after_write++; + } + } + else /*other row in same bank*/ + { + if (cmdIsRead) + { + if (corrected_overlap > 0)/*overlapping*/ + { + if (corrected_overlap >= DR_T_HELP)/*best case*/ + { + lat = DR_BEST_T_READ_READ_SBANK; + best_case++; + full_overlapping++; + } + else/*in between case*/ + { + lat = DR_T_READ_READ_SBANK-corrected_overlap; + in_between_case++; + partial_overlapping++; + } + } + else/*worst case*/ + { + lat = DR_T_READ_READ_SBANK; + worst_case++; + } + same_bank_read_access++; + sbr_after_read++; + } + else/*write*/ + { + if (corrected_overlap > 0)/*overlapping*/ + { + if (corrected_overlap >= DR_T_OWR)/*best case*/ + { + lat = DR_BEST_T_WRITE_WRITE_SBANK; + best_case++; + full_overlapping++; + } + else/*in between case*/ + { + lat = DR_T_WRITE_WRITE_SBANK-corrected_overlap; + in_between_case++; + partial_overlapping++; + } + } + else/*worst case*/ + { + lat = DR_T_WRITE_WRITE_SBANK; + worst_case++; + } + same_bank_write_access++; + sbw_after_write++; + } + } + } + else /*other bank*/ + { + if (cmdIsRead) + { + if (current_row == active_row[current_bank])/*row is still active*/ + { + if (corrected_overlap > 0 )/*overlapping*/ + { + if(corrected_overlap >= (DR_T_CAC+DR_T_PACKET))/*best case*/ + { + lat = DR_BEST_T_READ_READ_OBANK; + best_case++; + full_overlapping++; + } + else/*in between case*/ + { + lat = DR_T_CAC+DR_T_PACKET-corrected_overlap; + in_between_case++; + partial_overlapping++; + } + } + else/*in between case*/ + { + lat = DR_T_CAC+DR_T_PACKET; + in_between_case++; + } + other_bank_read_access_hit++; + obr_after_read_hit++; + } + else/*row is not active or bank is precharged/not active*/ + { + if (active_row[current_bank]!=DR_NUM_ROWS)/*row is not active, but bank is active*/ + { + if (corrected_overlap > 0 )/*overlapping*/ + { + if(corrected_overlap >= (DR_T_RP+DR_T_RCD+DR_T_CAC+DR_T_PACKET))/*best case*/ + { + lat = DR_BEST_T_READ_READ_OBANK; + best_case++; + full_overlapping++; + } + else/*in between case*/ + { + lat = DR_T_RP+DR_T_RCD+DR_T_CAC+DR_T_PACKET-corrected_overlap; + in_between_case++; + partial_overlapping++; + } + } + else/*worst case*/ + { + lat = DR_T_RP+DR_T_RCD+DR_T_CAC+DR_T_PACKET; + in_between_case++; + } + } + else/*current_row == DR_NUM_ROWS:precharged or inactive*/ + { + if(precharge == 0)/*no adjacent bank is active*/ + { + if (corrected_overlap > 0 )/*overlapping*/ + { + if(corrected_overlap >= (DR_T_RCD+DR_T_CAC+DR_T_PACKET))/*best case*/ + { + lat = DR_BEST_T_READ_READ_OBANK; + best_case++; + full_overlapping++; + } + else/*in between case*/ + { + lat = DR_T_RCD+DR_T_CAC+DR_T_PACKET-corrected_overlap; + in_between_case++; + partial_overlapping++; + } + } + else/*worst case*/ + { + lat = DR_T_RCD+DR_T_CAC+DR_T_PACKET; + in_between_case++; + } + } + else/*one ore two adjacent banks are active*/ + { + if (precharge == 1) + { + if (corrected_overlap > 0 )/*overlapping*/ + { + if(corrected_overlap >= (DR_T_RP+DR_T_RCD+DR_T_CAC+DR_T_PACKET))/*best case*/ + { + lat = DR_BEST_T_READ_READ_OBANK; + best_case++; + full_overlapping++; + } + else/*in between case*/ + { + lat = (DR_T_RP+DR_T_RCD+DR_T_CAC+DR_T_PACKET)-corrected_overlap; + in_between_case++; + partial_overlapping++; + } + } + else/*worst case*/ + { + lat = (DR_T_RP+DR_T_RCD+DR_T_CAC+DR_T_PACKET); + in_between_case++; + } + } + else /*precharge ==2: two rows must be precharged*/ + { + if (adjacent == 1)/*these banks are adjacent*/ + { + if (corrected_overlap > 0 )/*overlapping*/ + { + if(corrected_overlap >= DR_T_PP+2*DR_T_PACKET-DR_T_RDP+DR_T_CAC)/*best case*/ + { + lat = DR_T_RDP+DR_T_RP+DR_T_RCD-DR_T_PACKET; + in_between_case++; + full_overlapping++; + } + else/*in between case*/ + { + lat = DR_T_READ_READ_OBANK-corrected_overlap; + in_between_case++; + partial_overlapping++; + } + } + else/*worst case*/ + { + lat = DR_T_READ_READ_OBANK; + worst_case++; + } + } + else/*adjacent == 0: two not adjacent banks need to be precharged*/ + { + if (corrected_overlap > 0 )/*overlapping*/ + { + if(corrected_overlap >= DR_T_READ_READ_OBANK)/*best case*/ + { + lat = DR_BEST_T_READ_READ_OBANK; + best_case++; + full_overlapping++; + } + else/*in between case*/ + { + lat = DR_T_READ_READ_OBANK-corrected_overlap; + in_between_case++; + partial_overlapping++; + } + } + else/*worst case*/ + { + lat = DR_T_READ_READ_OBANK; + worst_case++; + } + } + } + } + } + other_bank_read_access_miss[0]++; + obr_after_read_miss++; + } + } + else/*write*/ + { + if (current_row == active_row[current_bank])/*row is still active*/ + { + if (corrected_overlap > 0 )/*overlapping*/ + { + if(corrected_overlap >= (DR_T_CWD+DR_T_PACKET))/*best case*/ + { + lat = DR_BEST_T_WRITE_WRITE_OBANK; + best_case++; + full_overlapping++; + } + else/*in between case*/ + { + lat = DR_T_CWD+DR_T_PACKET-corrected_overlap; + in_between_case++; + partial_overlapping++; + } + } + else/*worst case*/ + { + lat = DR_T_CWD+DR_T_PACKET; + in_between_case++; + } + other_bank_write_access_hit++; + obw_after_write_hit++; + } + else/*row is not active or bank is precharged/not active*/ + { + if (active_row[current_bank] != DR_NUM_ROWS)/*row is not active,but bank is active*/ + { + if (corrected_overlap > 0 )/*overlapping*/ + { + if(corrected_overlap >= (DR_T_RP+DR_T_RCD+DR_T_CWD+DR_T_PACKET))/*best case*/ + { + lat = DR_BEST_T_WRITE_WRITE_OBANK; + best_case++; + full_overlapping++; + } + else/*in between case*/ + { + lat = DR_T_RP+DR_T_RCD+DR_T_CWD+DR_T_PACKET-corrected_overlap; + in_between_case++; + partial_overlapping++; + } + } + else/*worst case*/ + { + lat = DR_T_RP+DR_T_RCD+DR_T_CWD+DR_T_PACKET; + in_between_case++; + } + } + else/*current_row == DR_NUM_ROWS:precharged or inactive*/ + { + if(precharge == 0)/*no adjacent bank is active*/ + { + if (corrected_overlap > 0 )/*overlapping*/ + { + if(corrected_overlap >= (DR_T_RCD+DR_T_CWD+DR_T_PACKET))/*best case*/ + { + lat = DR_BEST_T_WRITE_WRITE_OBANK; + best_case++; + full_overlapping++; + } + else/*in between case*/ + { + lat = DR_T_RCD+DR_T_CWD+DR_T_PACKET-corrected_overlap; + in_between_case++; + partial_overlapping++; + } + } + else/*worst case*/ + { + lat = DR_T_RCD+DR_T_CWD+DR_T_PACKET; + in_between_case++; + } + } + else/*one ore two adjacent banks are active*/ + { + if (precharge == 1)/*last_bank is no adjacent*/ + { + if (corrected_overlap > 0 )/*overlapping*/ + { + if(corrected_overlap >= (DR_T_RP+DR_T_RCD+DR_T_CWD+DR_T_PACKET))/*best case*/ + { + lat = DR_BEST_T_WRITE_WRITE_OBANK; + best_case++; + full_overlapping++; + } + else/*in between case*/ + { + lat = (DR_T_RP+DR_T_RCD+DR_T_CWD+DR_T_PACKET)-corrected_overlap; + in_between_case++; + partial_overlapping++; + } + } + else/*worst case*/ + { + lat = (DR_T_RP+DR_T_RCD+DR_T_CWD+DR_T_PACKET); + in_between_case++; + } + } + else /*precharge ==2: two rows have to be precharged*/ + { + if (adjacent == 1)/*these banks are adjacent*/ + { + if (corrected_overlap > 0 )/*overlapping*/ + { + if(corrected_overlap >= DR_T_OWR+DR_T_PP)/*best case*/ + { + lat = DR_T_WRITE_WRITE_OBANK-DR_T_OWR-DR_T_PP; + in_between_case++; + full_overlapping++; + } + else/*in between case*/ + { + lat = DR_T_WRITE_WRITE_OBANK-corrected_overlap; + in_between_case++; + partial_overlapping++; + } + } + else/*worst case*/ + { + lat = DR_T_WRITE_WRITE_OBANK; + worst_case++; + } + } + else/*adjacent == 0: two not adjacent banks need to be precharged*/ + { + if (corrected_overlap > 0 )/*overlapping*/ + { + if(corrected_overlap >= DR_T_WRITE_WRITE_OBANK)/*best case*/ + { + lat = DR_BEST_T_WRITE_WRITE_OBANK; + best_case++; + full_overlapping++; + } + else/*in between case*/ + { + lat = DR_T_WRITE_WRITE_OBANK-corrected_overlap; + in_between_case++; + partial_overlapping++; + } + } + else/*worst case*/ + { + lat = DR_T_WRITE_WRITE_OBANK; + worst_case++; + } + } + } + } + } + other_bank_write_access_miss[0]++; + obw_after_write_miss++; + } + } + } + } + else /*lastCmdIsRead != cmdIsRead*/ + { + if (current_bank == last_bank)/*same bank*/ + { + if (current_row == last_row)/*same row*/ + { + if (cmdIsRead) + { + if (corrected_overlap > 0)/*overlapping*/ + { + /*best case*/ + if (corrected_overlap >= DR_T_OWR) + { + lat=DR_BEST_T_READ_WRITE_SROW; + srow_flag = true; + best_case++; + full_overlapping++; + } + else/*in between case*/ + { + lat = DR_T_READ_WRITE_SROW-corrected_overlap; + srow_flag = true; + in_between_case++; + partial_overlapping++; + } + } + else + { + /*worst case*/ + lat = DR_T_READ_WRITE_SROW; + srow_flag = true; + worst_case++; + } + same_row_read_access++; + srr_after_write++; + } + else/*write*/ + { + if (corrected_overlap > 0)/*overlapping*/ + { + /*best case*/ + if (corrected_overlap >= DR_T_WRITE_READ_SROW) + { + lat=DR_BEST_T_WRITE_READ_SROW; + srow_flag = true; + best_case++; + full_overlapping++; + } + else/*in between case*/ + { + lat = DR_T_WRITE_READ_SROW-corrected_overlap; + srow_flag = true; + in_between_case++; + partial_overlapping++; + } + } + else + { + /*worst case*/ + lat = DR_T_WRITE_READ_SROW; + srow_flag = true; + worst_case++; + } + same_row_write_access++; + srw_after_read++; + } + } + else /*other row in same bank*/ + { + if (cmdIsRead) + { + if (corrected_overlap > 0 )/*overlapping*/ + { + if (corrected_overlap >= DR_T_OWR)/*best case*/ + { + lat = DR_BEST_T_READ_WRITE_SBANK; + best_case++; + full_overlapping++; + } + else/*in between case*/ + { + lat = DR_T_READ_WRITE_SBANK-corrected_overlap; + in_between_case++; + partial_overlapping++; + } + } + else/*worst case*/ + { + lat = DR_T_READ_WRITE_SBANK; + worst_case++; + } + same_bank_read_access++; + sbr_after_write++; + } + else/*write*/ + { + if (corrected_overlap > 0 )/*overlapping*/ + { + if (corrected_overlap >= DR_T_HELP)/*best case*/ + { + lat = DR_BEST_T_WRITE_READ_SBANK; + best_case++; + full_overlapping++; + } + else/*in between case*/ + { + lat = DR_T_WRITE_READ_SBANK-corrected_overlap; + in_between_case++; + partial_overlapping++; + } + } + else/*worst case*/ + { + lat = DR_T_WRITE_READ_SBANK; + worst_case++; + } + same_bank_write_access++; + sbw_after_read++; + } + } + } + else /*other bank*/ + { + if (cmdIsRead) + { + if (current_row == active_row[current_bank])/*row is still active*/ + { + if (corrected_overlap > 0 )/*overlapping*/ + { + if(last_dev != current_device) + { + if(corrected_overlap >= DR_T_CWD+DR_T_PACKET)/*best case*/ + { + lat = DR_BEST_T_READ_WRITE_ODEV; + best_case++; + full_overlapping++; + } + else/*in between case*/ + { + lat = DR_T_CAC+DR_T_PACKET-corrected_overlap; + in_between_case++; + partial_overlapping++; + } + } + else /* same device */ + { + if(corrected_overlap >= DR_T_OWR)/*best case*/ + { + lat = DR_BEST_T_READ_WRITE_OBANK; + best_case++; + full_overlapping++; + } + else/*in between case*/ + { + lat = DR_T_CAC+DR_T_PACKET-corrected_overlap; + in_between_case++; + partial_overlapping++; + } + } + } + else/*in between case, no overlap*/ + { + lat = DR_T_CAC+DR_T_PACKET; + in_between_case++; + } + other_bank_read_access_hit++; + obr_after_write_hit++; + } + + else/*row is not active or bank is precharged/not active*/ + { + if (active_row[current_bank] != DR_NUM_ROWS)/*row is not active,but bank is active*/ + { + if (corrected_overlap > 0 )/*overlapping*/ + { + if (last_dev != current_device) + { + if(corrected_overlap >= (DR_T_RP+DR_T_RCD+DR_T_CWD+DR_T_PACKET))/*best case*/ + { + lat = DR_BEST_T_READ_WRITE_ODEV; + best_case++; + full_overlapping++; + } + else/*in between case*/ + { + lat = DR_T_RP+DR_T_RCD+DR_T_CAC+DR_T_PACKET-corrected_overlap; + in_between_case++; + partial_overlapping++; + } + } + else /* same device */ + { + if(corrected_overlap >= (DR_T_RP+DR_T_RCD+DR_T_OWR))/*best case*/ + { + lat = DR_BEST_T_READ_WRITE_OBANK; + best_case++; + full_overlapping++; + } + else/*in between case*/ + { + lat = DR_T_RP+DR_T_RCD+DR_T_CAC+DR_T_PACKET-corrected_overlap; + in_between_case++; + partial_overlapping++; + } + } + } + else/*worst case*/ + { + lat = DR_T_RP+DR_T_RCD+DR_T_CAC+DR_T_PACKET; + in_between_case++; + } + } + else/*current_row == DR_NUM_ROWS:precharged or inactive*/ + { + if(precharge == 0)/*no adjacent bank is active*/ + { + if (corrected_overlap > 0 )/*overlapping*/ + { + if(last_dev != current_device) + { + if(corrected_overlap >= (DR_T_RCD+DR_T_CWD+DR_T_PACKET))/*best case*/ + { + lat = DR_BEST_T_READ_WRITE_ODEV; + best_case++; + full_overlapping++; + } + else/*in between case*/ + { + lat = DR_T_RCD+DR_T_CAC+DR_T_PACKET-corrected_overlap; + in_between_case++; + partial_overlapping++; + } + } + else /* same device */ + { + if(corrected_overlap >= (DR_T_RCD+DR_T_OWR))/*best case*/ + { + lat = DR_BEST_T_READ_WRITE_OBANK; + best_case++; + full_overlapping++; + } + else/*in between case*/ + { + lat = DR_T_RCD+DR_T_CAC+DR_T_PACKET-corrected_overlap; + in_between_case++; + partial_overlapping++; + } + } + } + else/*worst case*/ + { + lat = DR_T_RCD+DR_T_CAC+DR_T_PACKET; + in_between_case++; + } + } + else/*one or two adjacent banks are active*/ + { + if (precharge == 1)/*an adjacent bank (!=last_bank) needs to be precharged*/ + { + if (corrected_overlap > 0 )/*overlapping*/ + { + if(last_dev != current_device) + { + if(corrected_overlap >= (DR_T_RP+DR_T_RCD+DR_T_CWD+DR_T_PACKET))/*best case*/ + { + lat = DR_BEST_T_READ_WRITE_ODEV; + best_case++; + full_overlapping++; + } + else/*in between case*/ + { + lat = (DR_T_RP+DR_T_RCD+DR_T_CAC+DR_T_PACKET)-corrected_overlap; + in_between_case++; + partial_overlapping++; + } + } + else /* same device */ + { + if(corrected_overlap >= (DR_T_RP+DR_T_RCD+DR_T_OWR))/*best case*/ + { + lat = DR_BEST_T_READ_WRITE_OBANK; + best_case++; + full_overlapping++; + } + else/*in between case*/ + { + lat = (DR_T_RP+DR_T_RCD+DR_T_CAC+DR_T_PACKET)-corrected_overlap; + in_between_case++; + partial_overlapping++; + } + } + } + else/*worst case*/ + { + lat = (DR_T_RP+DR_T_RCD+DR_T_CAC+DR_T_PACKET); + in_between_case++; + } + } + else /*precharge ==2: two rows have to be precharged*/ + { + if (adjacent == 1) /* the banks are adjacent */ + { + if (corrected_overlap > 0 )/*overlapping*/ + { + if(corrected_overlap >= DR_T_OWR + DR_T_PP)/*best case*/ + { + lat = DR_T_READ_WRITE_OBANK-DR_T_OWR - DR_T_PP; + in_between_case++; + full_overlapping++; + } + else/*in between case*/ + { + lat = DR_T_READ_WRITE_OBANK-corrected_overlap; + in_between_case++; + partial_overlapping++; + } + } + else/*worst case*/ + { + lat = DR_T_READ_WRITE_OBANK; + worst_case++; + } + } + else/*adjacent == 0: two not adjacent banks need to be precharged*/ + { + if (corrected_overlap > 0 )/*overlapping*/ + { + if (last_dev != current_device) + { + if(corrected_overlap >= (DR_T_PP+DR_T_RP+DR_T_RCD+DR_T_CWD+DR_T_PACKET))/*best case*/ + { + lat = DR_BEST_T_READ_WRITE_ODEV; + best_case++; + full_overlapping++; + } + else/*in between case*/ + { + lat = DR_T_READ_WRITE_OBANK-corrected_overlap; + in_between_case++; + partial_overlapping++; + } + } + else /* same device */ + { + if(corrected_overlap >= (DR_T_PP+DR_T_RP+DR_T_RCD+DR_T_OWR))/*best case*/ + { + lat = DR_BEST_T_READ_WRITE_OBANK; + best_case++; + full_overlapping++; + } + else/*in between case*/ + { + lat = DR_T_READ_WRITE_OBANK-corrected_overlap; + in_between_case++; + partial_overlapping++; + } + } + } + else/*worst case*/ + { + lat = DR_T_READ_WRITE_OBANK; + worst_case++; + } + } + } + } + } + other_bank_read_access_miss[0]++; + obr_after_write_miss++; + } + } + else/*write*/ + { + if (current_row == active_row[current_bank])/*row is still active*/ + { + if (corrected_overlap > 0 )/*overlapping*/ + { + if(corrected_overlap >= DR_T_CWD+DR_T_PACKET)/*best case*/ + { + lat = DR_BEST_T_WRITE_READ_OBANK; + best_case++; + full_overlapping++; + } + else/*in between case*/ + { + lat = DR_T_CWD+DR_T_PACKET-corrected_overlap; + in_between_case++; + partial_overlapping++; + } + } + else/*in between case*/ + { + lat = DR_T_CWD+DR_T_PACKET; + in_between_case++; + } + other_bank_write_access_hit++; + obw_after_read_hit++; + } + else/*row is not active or bank is precharged/not active*/ + { + if (active_row[current_bank] != DR_NUM_ROWS)/*row is not active,but bank is active*/ + { + if (corrected_overlap > 0 )/*overlapping*/ + { + if(corrected_overlap >= (DR_T_RP+DR_T_RCD+DR_T_CWD+DR_T_PACKET))/*best case*/ + { + lat = DR_BEST_T_WRITE_READ_OBANK; + best_case++; + full_overlapping++; + } + else/*in between case*/ + { + lat = DR_T_RP+DR_T_RCD+DR_T_CWD+DR_T_PACKET-corrected_overlap; + in_between_case++; + partial_overlapping++; + } + } + else/*worst case*/ + { + lat = DR_T_RP+DR_T_RCD+DR_T_CWD+DR_T_PACKET; + in_between_case++; + } + } + else/*current_row == DR_NUM_ROWS:precharged or inactive*/ + { + if(precharge == 0)/*no adjacent bank is active*/ + { + if (corrected_overlap > 0 )/*overlapping*/ + { + if(corrected_overlap >= (DR_T_RCD+DR_T_CWD+DR_T_PACKET))/*best case*/ + { + lat = DR_BEST_T_WRITE_READ_OBANK; + best_case++; + full_overlapping++; + } + else/*in between case*/ + { + lat = DR_T_RCD+DR_T_CWD+DR_T_PACKET-corrected_overlap; + in_between_case++; + partial_overlapping++; + } + } + else/*worst case*/ + { + lat = DR_T_RCD+DR_T_CWD+DR_T_PACKET; + in_between_case++; + } + } + else/*one or two adjacent banks are active*/ + { + if (precharge == 1)/*an adjacent bank (!=last_bank) needs to be precharged first*/ + { + if (corrected_overlap > 0 )/*overlapping*/ + { + if(corrected_overlap >= (DR_T_RP+DR_T_RCD+DR_T_CWD+DR_T_PACKET))/*best case*/ + { + lat = DR_BEST_T_WRITE_READ_OBANK; + best_case++; + full_overlapping++; + } + else/*in between case*/ + { + lat = (DR_T_RP+DR_T_RCD+DR_T_CWD+DR_T_PACKET)-corrected_overlap; + in_between_case++; + partial_overlapping++; + } + } + else/*worst case*/ + { + lat = (DR_T_RP+DR_T_RCD+DR_T_CWD+DR_T_PACKET); + in_between_case++; + } + } + else /*precharge ==2: two rows have to be precharged*/ + { + if (adjacent == 1)/*these banks are adjacent*/ + { + if (corrected_overlap > 0 )/*overlapping*/ + { + if(corrected_overlap >= DR_T_PP-DR_T_RDP+2*DR_T_PACKET+DR_T_CAC)/*best case*/ + { + lat = DR_T_WRITE_READ_OBANK-(DR_T_PP-DR_T_RDP+2*DR_T_PACKET+DR_T_CAC); + in_between_case++; + full_overlapping++; + } + else/*in between case*/ + { + lat = DR_T_WRITE_READ_OBANK-corrected_overlap; + in_between_case++; + partial_overlapping++; + } + } + else/*worst case*/ + { + lat = DR_T_WRITE_READ_OBANK; + worst_case++; + } + } + else/*adjacent == 0: two not adjacent banks need to be precharged*/ + { + if (corrected_overlap > 0 )/*overlapping*/ + { + if(corrected_overlap >= DR_T_WRITE_READ_OBANK)/*best case*/ + { + lat = DR_BEST_T_WRITE_READ_OBANK; + best_case++; + full_overlapping++; + } + else/*in between case*/ + { + lat = DR_T_WRITE_READ_OBANK-corrected_overlap; + in_between_case++; + partial_overlapping++; + } + } + else/*worst case*/ + { + lat = DR_T_WRITE_READ_OBANK; + worst_case++; + } + } + } + } + } + other_bank_write_access_miss[0]++; + obw_after_read_miss++; + } + } + } + } + /*fprintf(stderr,"%4d %4d ",lat,active_row[current_bank]);debugging*/ + + lat += chunks * DR_T_PACKET; /*every 128 bit need DR_NUM_CYCLES*/ + + /*fprintf(stderr,"%4d ",lat);debugging*/ + + if (cpu_ratio < 1.0) + { + lat = (lat+((int)(1/cpu_ratio)-1))/(int)(1/cpu_ratio); + } + else + { + temp = (int)(lat*cpu_ratio); + lat = (lat*cpu_ratio == temp)?temp:(temp+1); /*round up*/ + } + + active_row[current_bank]=current_row; + lastCmdIsRead = cmdIsRead; + last_bank=current_bank; + last_row = current_row; + last_dev = current_device; + + /*fprintf(stderr,"%4d \n",lat);debugging*/ + + if (overlap <= 0) /*memory interface is not busy*/ + { + if (memctrlpipe_enable == true) + { + busy_until[current_bank] =curTick+lat; + } + else + { + if (busy_until[current_bank] >= curTick) + { + busy_until[current_bank] +=lat; + lat=busy_until[current_bank] - curTick; + } + else busy_until[current_bank] = curTick+lat; + } + } + else/*the memory request will be satisfied temp cycles after curTick*/ + { + busy_until[current_bank] +=lat; + command_overlapping++; + lat+=overlap; + } + + // if((_cpu_num < num_cpus) && (_cpu_num >= 0)) + // cout <<"cpu id = " << _cpu_num << "current_bank = " << current_bank << endl; + // bank_access_profile[_cpu_num][current_bank]++; + return lat; + } + + /******************************************************************/ + + else if ((mem_type== "SDRAM") && (mem_actpolicy == "closed") && (memctrlpipe_enable == true)) + /* SDRAM closed-page with overlap, 2/00 MG */ + { + if ((memctrladdr_type != "interleaved"))/* i.e. mc_type is linear*/ + { + // current_bank=physic_address/SD_BANK_SIZE; + current_bank=physic_address/bank_size; + } + else/*mc_type interleaved*/ + /* This memory management unit maps the addresses different + * depending on the row_size, every row is mapped to another + * bank. So the text segment uses half of every bank. The heap + * the next quarter of each bank and the stack the rest. + */ + { + num_blocks = physic_address/SD_ROW_SIZE; /* row number */ + // current_bank=num_blocks%SD_NUM_BANKS; + current_bank=num_blocks%num_banks; + } + + if (mem_access_details == true) + { + //fprintf(mem_accessfd," %09u %3d\n",physic_address,current_bank); + } + else + { + if (mem_access_output!=NULL) + { + //fprintf(mem_accessfd,"\n"); + } + } + total_access++; + + overlap=(int)(busy_until[current_bank] - curTick); + + if (current_bank == last_bank)/*same bank*/ + { + if ((lastCmdIsRead == cmdIsRead) && (cmdIsRead))/* RAR */ + { + lat = act_lat + cas_lat; + } + else if ((lastCmdIsRead == cmdIsRead) && (!cmdIsRead)) /* WAW */ + { + lat = act_lat; + } + else if ((lastCmdIsRead != cmdIsRead) && (cmdIsRead)) /* RAW */ + { + lat = act_lat + cas_lat; + } + else /* WAR */ + { + lat = act_lat; + } + } + else /* other bank */ + { + if (cpu_ratio < 1.0) + { + corrected_overlap = overlap*((int)(1/cpu_ratio)); /* floor */ + } + else + { + corrected_overlap = (int) (overlap/cpu_ratio); + } + + if ((lastCmdIsRead == cmdIsRead) && (cmdIsRead))/* RAR */ + { + if (corrected_overlap > act_lat + cas_lat) + { + lat = 0; + best_case++; + full_overlapping++; + } + else if (corrected_overlap > 0) + { + lat = act_lat + cas_lat - corrected_overlap; + in_between_case++; + partial_overlapping++; + } + else + { + lat = act_lat + cas_lat; + worst_case++; + } + } + else if ((lastCmdIsRead == cmdIsRead) && (!cmdIsRead)) /* WAW */ + { + if (corrected_overlap > act_lat + pre_lat + (dpl_lat-1)) + { + lat = - pre_lat - dpl_lat +1; + best_case++; + full_overlapping++; + } + else if (corrected_overlap > 0) + { + lat = act_lat - corrected_overlap; + in_between_case++; + partial_overlapping++; + } + else + { + lat = act_lat; + worst_case++; + } + } + else if ((lastCmdIsRead != cmdIsRead) && (cmdIsRead)) /* RAW */ + { + if (corrected_overlap > cas_lat + pre_lat + dpl_lat - 1 ) + { + lat = act_lat - (pre_lat + dpl_lat - 1); + best_case++; + partial_overlapping++; + } + else if (corrected_overlap > 0) + { + lat = act_lat + cas_lat - corrected_overlap; + in_between_case++; + partial_overlapping++; + } + else + { + lat = act_lat + cas_lat; + worst_case++; + } + } + else /* WAR */ + { + if (corrected_overlap > act_lat - (dpl_lat-1)) + { + lat = dpl_lat-1; + best_case++; + partial_overlapping++; + } + else if (corrected_overlap > 0) + { + lat = act_lat - corrected_overlap; + in_between_case++; + partial_overlapping++; + } + else + { + lat = act_lat; + worst_case++; + } + } + } + lastCmdIsRead = cmdIsRead; + last_bank=current_bank; + last_row = current_row; + + lat += chunks; + + if (cpu_ratio < 1.0) + { + lat = (lat+((int)(1/cpu_ratio)-1))/(int)(1/cpu_ratio); + } + else + { + temp = (int)(lat*cpu_ratio); + lat = (lat*cpu_ratio == temp)?temp:(temp+1); /*round up*/ + } + + /*fprintf(stderr,"%4d \n",lat); debugging */ + + if (overlap <= 0) /*memory interface is not busy*/ + { + busy_until[current_bank] = curTick+lat; + } + else /*the memory request will be satisfied temp cycles after curTick*/ + { + busy_until[current_bank] +=lat; + command_overlapping++; + total_arb_latency += overlap; + lat+=overlap; + } + if (!cmdIsRead) + { + temp = (int)(((dpl_lat-1) + pre_lat)*cpu_ratio); + busy_until[current_bank] += (((dpl_lat-1) + pre_lat)*cpu_ratio == temp)?temp:(temp+1); + } + + + + /*fprintf(stderr,"%10.0f %10.0f %4d %4d \n",(double)busy_until, (double)curTick, overlap, lat);debug*/ + // if((_cpu_num < num_cpus) && (_cpu_num >= 0)) + // cout <<"cpu id = " << _cpu_num << "current_bank = " << current_bank << endl; + // bank_access_profile[_cpu_num][current_bank]++; + return lat; + } + + /******************************************************************/ + + else if ((mem_type == "DRDRAM") && (mem_actpolicy == "closed") && (memctrlpipe_enable == true)) + /* DRDRAM closed-page with overlap*/ + { + + if ((memctrladdr_type != "interleaved"))/*i.e. mc_type is linear*/ + { + current_bank=physic_address/DR_BANK_SIZE; + current_device=current_bank/(DR_NUM_BANKS/DR_NUM_DEVS); + } + else/*mc_type interleaved*/ + /* This memory management unit maps the addresses different + * depending on the row-size, every row is mapped to another + * bank. So the text segment uses half of every bank. The heap + * the next quarter of each bank and the stack the rest. + */ + { + num_blocks = physic_address/DR_ROW_SIZE; /* row number */ + current_bank=(num_blocks%DR_NUM_BANKS)*2; /*every 'second' bank will be used*/ + /*banks above DR_NUM_BANKS are the uneven banks*/ + current_bank = ((current_bank < DR_NUM_BANKS) ? current_bank:(current_bank - DR_NUM_BANKS+1)); + current_device=current_bank/(DR_NUM_BANKS/DR_NUM_DEVS); + } + + + if (mem_access_details == true) + { + //fprintf(mem_accessfd," %09u %3d \n",physic_address,current_bank); + } + else + { + if (mem_access_output!=NULL) + { + //fprintf(mem_accessfd,"\n"); + } + } + total_access++; + + overlap=(int)(busy_until[current_bank] - curTick); + + if (cpu_ratio < 1.0) + { + corrected_overlap = overlap*((int)(1/cpu_ratio)); /* floor */ + } + else + { + corrected_overlap = (int) (overlap/cpu_ratio); + } + + if (current_bank == last_bank)/*same bank*/ + { + if ((lastCmdIsRead == cmdIsRead) && (cmdIsRead))/* RAR */ + { + lat = DR_T_RCD + DR_T_CAC + DR_T_PACKET; + worst_case++; + } + else if ((lastCmdIsRead == cmdIsRead) && (!cmdIsRead)) /* WAW */ + { + lat = DR_T_RCD + DR_T_CWD + DR_T_PACKET; + worst_case++; + } + else if ((lastCmdIsRead != cmdIsRead) && (cmdIsRead)) /* RAW */ + { + lat = DR_T_RCD + DR_T_CAC + DR_T_PACKET; + worst_case++; + } + else /* WAR */ + { + lat = DR_T_RCD + DR_T_CWD + DR_T_PACKET; + worst_case++; + } + } + else /* other bank */ + { + if ((lastCmdIsRead == cmdIsRead) && (cmdIsRead))/* RAR */ + { + if (corrected_overlap > DR_T_RAS + DR_T_RP - 2 * DR_T_PACKET) + { + lat = - DR_T_RAS + DR_T_RCD + DR_T_PACKET + DR_T_CAC; + best_case++; + full_overlapping++; + } + else if (corrected_overlap > 0) + { + lat = DR_T_RCD + DR_T_CAC + DR_T_PACKET - corrected_overlap; + in_between_case++; + partial_overlapping++; + } + else + { + lat = DR_T_RCD + DR_T_CAC + DR_T_PACKET; + worst_case++; + } + } + else if ((lastCmdIsRead == cmdIsRead) && (!cmdIsRead)) /* WAW */ + { + if (corrected_overlap > DR_T_RCD + DR_T_RTR + DR_T_RP) + { + lat = - DR_T_CWD - 2 * DR_T_PACKET + DR_T_RTR; + best_case++; + full_overlapping++; + } + else if (corrected_overlap > 0) + { + lat = DR_T_RCD + DR_T_CWD + DR_T_PACKET - corrected_overlap; + in_between_case++; + partial_overlapping++; + } + else + { + lat = DR_T_RCD + DR_T_CWD + DR_T_PACKET; + worst_case++; + } + } + else if ((lastCmdIsRead != cmdIsRead) && (cmdIsRead)) /* RAW */ + { + if (current_device == last_dev) /* same device */ + { + if (corrected_overlap > DR_T_RCD + DR_T_RP) + { + lat = DR_T_PACKET + DR_T_CAC - DR_T_RP; + best_case++; + partial_overlapping++; + } + else if (corrected_overlap > 0) + { + lat = DR_T_RCD + DR_T_CAC + DR_T_PACKET - corrected_overlap; + in_between_case++; + partial_overlapping++; + } + else + { + lat = DR_T_RCD + DR_T_CAC + DR_T_PACKET; + worst_case++; + } + } + else /* other device */ + { + if (corrected_overlap > DR_T_RCD + DR_T_RP + 2 * DR_T_PACKET) + { + lat = - DR_T_PACKET + DR_T_CAC - DR_T_RP; + best_case++; + partial_overlapping++; + } + else if (corrected_overlap > 0) + { + lat = DR_T_RCD + DR_T_CAC + DR_T_PACKET - corrected_overlap; + in_between_case++; + partial_overlapping++; + } + else + { + lat = DR_T_RCD + DR_T_CAC + DR_T_PACKET; + worst_case++; + } + } + } + else /* WAR */ + { + if (corrected_overlap > DR_T_RAS + DR_T_RP - 2 * DR_T_PACKET - (DR_T_CAC - DR_T_CWD)) + { + lat = - DR_T_RAS + DR_T_RCD + DR_T_PACKET + DR_T_CAC; + best_case++; + full_overlapping++; + } + else if (corrected_overlap > 0) + { + lat = DR_T_RCD + DR_T_CWD + DR_T_PACKET - corrected_overlap; + in_between_case++; + partial_overlapping++; + } + else + { + lat = DR_T_RCD + DR_T_CWD + DR_T_PACKET; + worst_case++; + } + } + } + + lat += chunks * DR_T_PACKET; /*every 128 bit need DR_NUM_CYCLES*/ + + /*fprintf(stderr,"%4d ",lat);debugging*/ + + if (cpu_ratio < 1.0) + { + lat = (lat+((int)(1/cpu_ratio)-1))/(int)(1/cpu_ratio); + } + else + { + temp = (int)(lat*cpu_ratio); + lat = (lat*cpu_ratio == temp)?temp:(temp+1); /*round up*/ + } + + lastCmdIsRead=cmdIsRead; + last_bank=current_bank; + last_dev = current_device; + + /*fprintf(stderr,"%4d \n",lat);debugging*/ + + if (overlap <= 0) /*memory interface is not busy*/ + { + busy_until[current_bank] = curTick+lat; + } + else/*the memory request will be satisfied temp cycles after curTick*/ + { + busy_until[current_bank] +=lat; + command_overlapping++; + lat+=overlap; + } + + /*fprintf(stderr,"%10.0f %10.0f %4d %4d \n",(double)busy_until, (double)curTick, overlap, lat);*/ + + if (cmdIsRead) + { + if (cpu_ratio < 1.0) + { + busy_until[current_bank] += abs(((DR_T_RAS - (DR_T_RCD + DR_T_PACKET + DR_T_CAC)) + 1)/((int)(1/cpu_ratio))); /* CPU clock cycles */ + } + else + { + busy_until[current_bank] += (int) abs(((DR_T_RAS - (DR_T_RCD + DR_T_PACKET + DR_T_CAC)) + 1)*cpu_ratio); /* CPU clock cycles */ + } + } + else /* !cmdIsRead */ + { + if (cpu_ratio < 1.0) + { + busy_until[current_bank] += abs((-DR_T_PACKET + DR_T_RTR + DR_T_RP - DR_T_CWD + 1)/((int)(1/cpu_ratio))); /* CPU clock cycles */ + } + else + { + busy_until[current_bank] += (int) abs((-DR_T_PACKET + DR_T_RTR + DR_T_RP - DR_T_CWD + 1)*cpu_ratio); /* CPU clock cycles */ + } + } + + // if((_cpu_num < num_cpus) && (_cpu_num >= 0)) + // cout <<"cpu id = " << _cpu_num << "current_bank = " << current_bank << endl; + // bank_access_profile[_cpu_num][current_bank]++; + return lat; + } + + /******************************************************************/ + + else if ((mem_type == "SDRAM") && (mem_actpolicy == "closed") && (memctrlpipe_enable == false)) + /* SDRAM closed-page without overlap, 7/99 MG */ + { + if (mem_access_output != NULL) + { + //fprintf(mem_accessfd,"\n"); + } + assert(chunks >0); + + if (cmdIsRead) + { + lat = act_lat + cas_lat; + } + else /* !cmdIsRead */ + { + lat = act_lat; + } + total_access++; + lat += chunks; + + overlap=(int)(busy_until[current_bank] - curTick); + lastCmdIsRead=cmdIsRead; + + if (cpu_ratio < 1.0) + { + lat = (lat+((int)(1/cpu_ratio)-1))/(int)(1/cpu_ratio); + } + else + { + temp = (int)(lat*cpu_ratio); + lat = (lat*cpu_ratio == temp)?temp:(temp+1); /*round up*/ + } + + if (overlap <= 0) /*memory interface is not busy*/ + { + busy_until[current_bank] = curTick+lat; + } + else/*the memory request will be satisfied temp cycles after curTick*/ + { + busy_until[current_bank] +=lat; + command_overlapping++; + lat+=overlap; + } + if (!cmdIsRead) + { + temp = (int)(((dpl_lat-1) + pre_lat)*cpu_ratio); + busy_until[current_bank] += (((dpl_lat-1) + pre_lat)*cpu_ratio == temp)?temp:(temp+1); + } + + // if((_cpu_num < num_cpus) && (_cpu_num >= 0)) + // cout <<"cpu id = " << _cpu_num << "current_bank = " << current_bank << endl; + // bank_access_profile[_cpu_num][current_bank]++; + return lat; + } + + /******************************************************************/ + + else if ((mem_type == "DRDRAM") && (mem_actpolicy == "closed") && (memctrlpipe_enable == false)) + /* DRDRAM closed-page without overlap */ + { + if (cmdIsRead) + { + lat = DR_T_RCD + DR_T_CAC + DR_T_PACKET; /* DR_T_RP + */ + } + else /* !cmdIsRead */ + { + lat = DR_T_RCD + DR_T_CWD + DR_T_PACKET; /* DR_T_RP + */ + } + total_access++; + overlap=(int)(busy_until[current_bank] - curTick); + lat += chunks * DR_T_PACKET; /*every 128 bit need DR_NUM_CYCLES*/ + + if (cpu_ratio < 1.0) + { + lat = (lat+((int)(1/cpu_ratio)-1))/(int)(1/cpu_ratio); + } + else + { + temp = (int)(lat*cpu_ratio); + lat = (lat*cpu_ratio == temp)?temp:(temp+1); /*round up*/ + } + + lastCmdIsRead=cmdIsRead; + + if (overlap <= 0) /*memory interface is not busy*/ + { + busy_until[current_bank] = curTick+lat; + } + else/*the memory request will be satisfied temp cycles after curTick*/ + { + busy_until[current_bank] += lat; + command_overlapping++; + lat+=overlap; + } + + if (cmdIsRead) + { + if (cpu_ratio < 1.0) + { + busy_until[current_bank] += abs(((DR_T_RAS - (DR_T_RCD + DR_T_PACKET + DR_T_CAC)) + 1)/((int)(1/cpu_ratio))); /* CPU clock cycles */ + } + else + { + busy_until[current_bank] += (int) abs(((DR_T_RAS - (DR_T_RCD + DR_T_PACKET + DR_T_CAC)) + 1)*cpu_ratio); /* CPU clock cycles */ + } + } + else /* !cmdIsRead */ + { + if (cpu_ratio < 1.0) + { + busy_until[current_bank] += abs((-DR_T_PACKET + DR_T_RTR + DR_T_RP - DR_T_CWD + 1)/((int)(1/cpu_ratio))); /* CPU clock cycles */ + } + else + { + busy_until[current_bank] += (int) abs((-DR_T_PACKET + DR_T_RTR + DR_T_RP - DR_T_CWD + 1)*cpu_ratio); /* CPU clock cycles */ + } + } + // if((_cpu_num < num_cpus) && (_cpu_num >= 0)) + // cout <<"cpu id = " << _cpu_num << "current_bank = " << current_bank << endl; + // bank_access_profile[_cpu_num][current_bank]++; + return lat; + } + + /******************************************************************/ + + else /*STD*/ + { + if (mem_access_output != NULL) + { + //fprintf(mem_accessfd,"\n"); + } + assert(chunks >0); + // if((_cpu_num < num_cpus) && (_cpu_num >= 0)) + // cout <<"cpu id = " << _cpu_num << "current_bank = " << current_bank << endl; + // bank_access_profile[_cpu_num][current_bank]++; + return(/* first chunk latency */act_lat + + (/* remainder chunk latency */cas_lat * (chunks - 1))); + } + +} + +/*end added by ar, MG*/ + +/*begin added by ar, MG*/ + +/* ================ helper functions ========================= */ + +/****** DRDRAM specific: shared sense amplifiers ******/ +/* precharges the adjacent banks and returns the number of them (1 or 2)*/ +int /*number of precharged banks*/ +DRAMMemory::prechargeBanksAround(int bank)/*access to bank */ +{ +int temp; + +temp=bank%DR_BANK_SAMP; + +if (temp == 0) /*bank 0, 16,32 ....*/ + { + if (active_row[bank+1]!=DR_NUM_ROWS) + { + precharge++; + active_row[bank+1]=DR_NUM_ROWS; + } + } +else + { + if (temp==DR_BANK_SAMP-1)/*banks 15,31 ...*/ + { + if (active_row[bank-1]!=DR_NUM_ROWS) + { + precharge++; + active_row[bank-1]=DR_NUM_ROWS; + } + } + else + { + if (active_row[bank-1]!=DR_NUM_ROWS) + { + precharge++; + active_row[bank-1]=DR_NUM_ROWS; + } + if (active_row[bank+1]!=DR_NUM_ROWS) + { + precharge++; + active_row[bank+1]=DR_NUM_ROWS; + } + } + } +return precharge; +} + + +#ifndef DOXYGEN_SHOULD_SKIP_THIS + +BEGIN_DECLARE_SIM_OBJECT_PARAMS(DRAMMemory) + + Param<std::string> file; + Param<Range<Addr> > range; + Param<Tick> latency; + /* additional params for dram protocol*/ + Param<int> cpu_ratio; + Param<std::string> mem_type; + Param<std::string> mem_actpolicy; + Param<std::string> memctrladdr_type; + Param<int> bus_width; + Param<int> act_lat; + Param<int> cas_lat; + Param<int> war_lat; + Param<int> pre_lat; + Param<int> dpl_lat; + Param<int> trc_lat; + Param<int> num_banks; + Param<int> num_cpus; + +END_DECLARE_SIM_OBJECT_PARAMS(DRAMMemory) + +BEGIN_INIT_SIM_OBJECT_PARAMS(DRAMMemory) + + INIT_PARAM_DFLT(file, "memory mapped file", ""), + INIT_PARAM(range, "Device Address Range"), + INIT_PARAM(latency, "Memory access latency"), + + /* additional params for dram protocol*/ + INIT_PARAM_DFLT(cpu_ratio,"ratio between CPU speed and memory bus speed",5), + INIT_PARAM_DFLT(mem_type,"type of DRAM","SDRAM"), + INIT_PARAM_DFLT(mem_actpolicy,"open / closed page policy","open"), + INIT_PARAM_DFLT(memctrladdr_type,"interleaved or direct mapping","interleaved"), + INIT_PARAM_DFLT(bus_width,"memory access bus width",16), + INIT_PARAM_DFLT(act_lat,"RAS to CAS delay",2), + INIT_PARAM_DFLT(cas_lat,"CAS delay",1), + INIT_PARAM_DFLT(war_lat,"write after read delay",2), + INIT_PARAM_DFLT(pre_lat,"precharge delay",2), + INIT_PARAM_DFLT(dpl_lat,"data in to precharge delay",2), + INIT_PARAM_DFLT(trc_lat,"row cycle delay",6), + INIT_PARAM_DFLT(num_banks,"Number of Banks",4), + INIT_PARAM_DFLT(num_cpus,"Number of CPUs connected to DRAM",4) + +END_INIT_SIM_OBJECT_PARAMS(DRAMMemory) + +CREATE_SIM_OBJECT(DRAMMemory) +{ + DRAMMemory::Params *p = new DRAMMemory::Params; + p->name = getInstanceName(); + p->addrRange = range; + p->latency = latency; + + /* additional params for dram */ + p->cpu_ratio = cpu_ratio; + p->bus_width = bus_width; + p->mem_type = mem_type; + p->mem_actpolicy = mem_actpolicy; + p->memctrladdr_type = memctrladdr_type; + p->act_lat = act_lat; + p->cas_lat = cas_lat; + p->war_lat = war_lat; + p->pre_lat = pre_lat; + p->dpl_lat = dpl_lat; + p->trc_lat = trc_lat; + p->num_banks = num_banks; + p->num_cpus = num_cpus; + + return new DRAMMemory(p); +} + +REGISTER_SIM_OBJECT("DRAMMemory", DRAMMemory) + +#endif // DOXYGEN_SHOULD_SKIP_THIS + + diff --git a/src/mem/dram.hh b/src/mem/dram.hh new file mode 100644 index 000000000..32d117596 --- /dev/null +++ b/src/mem/dram.hh @@ -0,0 +1,172 @@ +/* + * Copyright (c) 2003-2004 The Regents of The University of Michigan + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer; + * redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution; + * neither the name of the copyright holders nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * Authors: Ron Dreslinski + * Ali Saidi + */ + +/** + * @file + * Derrive a class from PhysicalMemory that support DRAM like timing access. + */ +#ifndef __MEM_DRAM_HH__ +#define __MEM_DRAM_HH__ + +#include "base/statistics.hh" +#include "mem/physical.hh" + +class DRAMMemory : public PhysicalMemory +{ + protected: + /* added for dram support */ + const int cpu_ratio; // ratio between CPU speed and memory bus speed + const int bus_width; // memory access bus width (in bytes) + /* memory access latency (<first_chunk> <inter_chunk>) */ + const std::string mem_type; + const std::string mem_actpolicy; + const std::string memctrladdr_type; + const int act_lat; + const int cas_lat; + const int war_lat; + const int pre_lat; + const int dpl_lat; + const int trc_lat; + const int num_banks; + const int num_cpus; + + int bank_size; + int num_rows; + int *active_row; + int last_bank; + int last_row; + Tick *busy_until; + int last_dev; + bool lastCmdIsRead; + int precharge; + + /* memory access statistics */ + int same_row_read_access; + int srr_after_read; + int srr_after_write; + int same_row_write_access; + int srw_after_read; + int srw_after_write; + + int same_bank_read_access; + int sbr_after_read; + int sbr_after_write; + int same_bank_write_access; + int sbw_after_read; + int sbw_after_write; + + int other_bank_read_access_hit; + int obr_after_read_hit; + int obr_after_write_hit; + int other_bank_write_access_hit; + int obw_after_read_hit; + int obw_after_write_hit; + // DR + // int other_bank_read_access_miss; + int obr_after_read_miss; + int obr_after_write_miss; + // DR + // int other_bank_write_access_miss; + int obw_after_read_miss; + int obw_after_write_miss; + + int total_access; + + int adjacent_access; + int adjacent_read; + int adjacent_write; + int command_overlapping; + int best_case; + int in_between_case; + int worst_case; + int full_overlapping; + int partial_overlapping; + + int mem_access_details; + int memctrlpipe_enable; + + Tick time_last_access; + + + Stats::Vector<> accesses; + Stats::Vector<> bytesRequested; + Stats::Vector<> bytesSent; + Stats::Vector<> compressedAccesses; + + Stats::Vector<> cycles_nCKE; + Stats::Vector<> cycles_all_precharge_CKE; + Stats::Vector<> cycles_all_precharge_nCKE; + Stats::Vector<> cycles_bank_active_nCKE; + Stats::Vector<> cycles_avg_ACT; + Stats::Vector<> cycles_read_out; + Stats::Vector<> cycles_write_in; + Stats::Vector<> cycles_between_misses; + Stats::Vector<> other_bank_read_access_miss; + Stats::Vector<> other_bank_write_access_miss; + Stats::Scalar<> total_latency; + Stats::Scalar<> total_icache_req; + Stats::Scalar<> total_arb_latency; + Stats::Formula avg_latency; + Stats::Formula avg_arb_latency; + Stats::Vector2d<> bank_access_profile; + + + protected: + Tick calculateLatency(Packet *pkt); + int prechargeBanksAround(int bank); + + public: + struct Params : public PhysicalMemory::Params + { + /* additional params for dram protocol*/ + int cpu_ratio; + int bus_width; + + std::string mem_type; /* DRDRAM, SDRAM */ + std::string mem_actpolicy; /* closed, open */ + std::string memctrladdr_type; /* interleaved, anythingelse */ + + int act_lat; + int cas_lat; + int war_lat; + int pre_lat; + int dpl_lat; + int trc_lat; + int num_banks; + int num_cpus; + + }; + virtual void regStats(); + DRAMMemory(Params *p); +}; + +#endif// __MEM_DRAM_HH__ + diff --git a/src/mem/packet.hh b/src/mem/packet.hh index a88c78a78..5d8308df7 100644 --- a/src/mem/packet.hh +++ b/src/mem/packet.hh @@ -223,7 +223,7 @@ class Packet bool isNoAllocate() { return (flags & NO_ALLOCATE) != 0; } bool isCompressed() { return (flags & COMPRESSED) != 0; } - bool nic_pkt() { assert("Unimplemented\n" && 0); } + bool nic_pkt() { assert("Unimplemented\n" && 0); return false; } /** Possible results of a packet's request. */ enum Result diff --git a/src/mem/physical.cc b/src/mem/physical.cc index 291c70d8c..f4fbd2fb1 100644 --- a/src/mem/physical.cc +++ b/src/mem/physical.cc @@ -54,25 +54,22 @@ using namespace std; using namespace TheISA; -PhysicalMemory::PhysicalMemory(const string &n, Tick latency) - : MemObject(n),base_addr(0), pmem_addr(NULL), port(NULL), lat(latency) +PhysicalMemory::PhysicalMemory(Params *p) + : MemObject(p->name), pmemAddr(NULL), port(NULL), lat(p->latency), _params(p) { - // Hardcoded to 128 MB for now. - pmem_size = 1 << 27; - - if (pmem_size % TheISA::PageBytes != 0) + if (params()->addrRange.size() % TheISA::PageBytes != 0) panic("Memory Size not divisible by page size\n"); int map_flags = MAP_ANON | MAP_PRIVATE; - pmem_addr = (uint8_t *)mmap(NULL, pmem_size, PROT_READ | PROT_WRITE, + pmemAddr = (uint8_t *)mmap(NULL, params()->addrRange.size(), PROT_READ | PROT_WRITE, map_flags, -1, 0); - if (pmem_addr == (void *)MAP_FAILED) { + if (pmemAddr == (void *)MAP_FAILED) { perror("mmap"); fatal("Could not mmap!\n"); } - page_ptr = 0; + pagePtr = 0; } void @@ -85,18 +82,18 @@ PhysicalMemory::init() PhysicalMemory::~PhysicalMemory() { - if (pmem_addr) - munmap(pmem_addr, pmem_size); + if (pmemAddr) + munmap(pmemAddr, params()->addrRange.size()); //Remove memPorts? } Addr PhysicalMemory::new_page() { - Addr return_addr = page_ptr << LogVMPageSize; - return_addr += base_addr; + Addr return_addr = pagePtr << LogVMPageSize; + return_addr += params()->addrRange.start; - ++page_ptr; + ++pagePtr; return return_addr; } @@ -107,20 +104,25 @@ PhysicalMemory::deviceBlockSize() return 0; } - Tick +PhysicalMemory::calculateLatency(Packet *pkt) +{ + return lat; +} + +void PhysicalMemory::doFunctionalAccess(Packet *pkt) { - assert(pkt->getAddr() + pkt->getSize() < pmem_size); + assert(pkt->getAddr() + pkt->getSize() < params()->addrRange.size()); switch (pkt->cmd) { case Packet::ReadReq: memcpy(pkt->getPtr<uint8_t>(), - pmem_addr + pkt->getAddr() - base_addr, + pmemAddr + pkt->getAddr() - params()->addrRange.start, pkt->getSize()); break; case Packet::WriteReq: - memcpy(pmem_addr + pkt->getAddr() - base_addr, + memcpy(pmemAddr + pkt->getAddr() - params()->addrRange.start, pkt->getPtr<uint8_t>(), pkt->getSize()); // temporary hack: will need to add real LL/SC implementation @@ -134,7 +136,6 @@ PhysicalMemory::doFunctionalAccess(Packet *pkt) } pkt->result = Packet::Success; - return lat; } Port * @@ -181,7 +182,7 @@ PhysicalMemory::getAddressRanges(AddrRangeList &resp, AddrRangeList &snoop) { snoop.clear(); resp.clear(); - resp.push_back(RangeSize(base_addr, pmem_size)); + resp.push_back(RangeSize(params()->addrRange.start, params()->addrRange.size())); } int @@ -195,7 +196,9 @@ PhysicalMemory::MemoryPort::recvTiming(Packet *pkt) { assert(pkt->result != Packet::Nacked); - Tick latency = memory->doFunctionalAccess(pkt); + Tick latency = memory->calculateLatency(pkt); + + memory->doFunctionalAccess(pkt); pkt->makeTimingResponse(); sendTiming(pkt, latency); @@ -206,7 +209,8 @@ PhysicalMemory::MemoryPort::recvTiming(Packet *pkt) Tick PhysicalMemory::MemoryPort::recvAtomic(Packet *pkt) { - return memory->doFunctionalAccess(pkt); + memory->doFunctionalAccess(pkt); + return memory->calculateLatency(pkt); } void @@ -232,7 +236,6 @@ PhysicalMemory::serialize(ostream &os) gzFile compressedMem; string filename = name() + ".physmem"; - SERIALIZE_SCALAR(pmem_size); SERIALIZE_SCALAR(filename); // write memory file @@ -248,7 +251,7 @@ PhysicalMemory::serialize(ostream &os) fatal("Insufficient memory to allocate compression state for %s\n", filename); - if (gzwrite(compressedMem, pmem_addr, pmem_size) != pmem_size) { + if (gzwrite(compressedMem, pmemAddr, params()->addrRange.size()) != params()->addrRange.size()) { fatal("Write failed on physical memory checkpoint file '%s'\n", filename); } @@ -269,12 +272,8 @@ PhysicalMemory::unserialize(Checkpoint *cp, const string §ion) const int chunkSize = 16384; - // unmap file that was mmaped in the constructor - munmap(pmem_addr, pmem_size); - string filename; - UNSERIALIZE_SCALAR(pmem_size); UNSERIALIZE_SCALAR(filename); filename = cp->cptDir + "/" + filename; @@ -291,11 +290,15 @@ PhysicalMemory::unserialize(Checkpoint *cp, const string §ion) fatal("Insufficient memory to allocate compression state for %s\n", filename); + // unmap file that was mmaped in the constructor + // This is done here to make sure that gzip and open don't muck with our + // nice large space of memory before we reallocate it + munmap(pmemAddr, params()->addrRange.size()); - pmem_addr = (uint8_t *)mmap(NULL, pmem_size, PROT_READ | PROT_WRITE, + pmemAddr = (uint8_t *)mmap(NULL, params()->addrRange.size(), PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE, -1, 0); - if (pmem_addr == (void *)MAP_FAILED) { + if (pmemAddr == (void *)MAP_FAILED) { perror("mmap"); fatal("Could not mmap physical memory!\n"); } @@ -306,19 +309,19 @@ PhysicalMemory::unserialize(Checkpoint *cp, const string §ion) fatal("Unable to malloc memory to read file %s\n", filename); /* Only copy bytes that are non-zero, so we don't give the VM system hell */ - while (curSize < pmem_size) { + while (curSize < params()->addrRange.size()) { bytesRead = gzread(compressedMem, tempPage, chunkSize); - if (bytesRead != chunkSize && bytesRead != pmem_size - curSize) + if (bytesRead != chunkSize && bytesRead != params()->addrRange.size() - curSize) fatal("Read failed on physical memory checkpoint file '%s'" " got %d bytes, expected %d or %d bytes\n", - filename, bytesRead, chunkSize, pmem_size-curSize); + filename, bytesRead, chunkSize, params()->addrRange.size()-curSize); assert(bytesRead % sizeof(long) == 0); for (int x = 0; x < bytesRead/sizeof(long); x++) { if (*(tempPage+x) != 0) { - pmem_current = (long*)(pmem_addr + curSize + x * sizeof(long)); + pmem_current = (long*)(pmemAddr + curSize + x * sizeof(long)); *pmem_current = *(tempPage+x); } } @@ -352,8 +355,11 @@ END_INIT_SIM_OBJECT_PARAMS(PhysicalMemory) CREATE_SIM_OBJECT(PhysicalMemory) { - - return new PhysicalMemory(getInstanceName(), latency); + PhysicalMemory::Params *p = new PhysicalMemory::Params; + p->name = getInstanceName(); + p->addrRange = range; + p->latency = latency; + return new PhysicalMemory(p); } REGISTER_SIM_OBJECT("PhysicalMemory", PhysicalMemory) diff --git a/src/mem/physical.hh b/src/mem/physical.hh index b549c1f8b..1489e6700 100644 --- a/src/mem/physical.hh +++ b/src/mem/physical.hh @@ -80,19 +80,28 @@ class PhysicalMemory : public MemObject const PhysicalMemory &operator=(const PhysicalMemory &specmem); protected: - Addr base_addr; - Addr pmem_size; - uint8_t *pmem_addr; + uint8_t *pmemAddr; MemoryPort *port; - int page_ptr; + int pagePtr; Tick lat; public: Addr new_page(); - uint64_t size() { return pmem_size; } + uint64_t size() { return params()->addrRange.size(); } + + struct Params + { + std::string name; + Range<Addr> addrRange; + Tick latency; + }; + + protected: + Params *_params; public: - PhysicalMemory(const std::string &n, Tick latency); + const Params *params() const { return _params; } + PhysicalMemory(Params *p); virtual ~PhysicalMemory(); public: @@ -102,9 +111,9 @@ class PhysicalMemory : public MemObject void virtual init(); unsigned int drain(Event *de); - private: - Tick doFunctionalAccess(Packet *pkt); - + protected: + void doFunctionalAccess(Packet *pkt); + virtual Tick calculateLatency(Packet *pkt); void recvStatusChange(Port::Status status); public: |