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-
-/*
- * Copyright (c) 1999-2008 Mark D. Hill and David A. Wood
- * 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.
- */
-
-/*
- * $Id: BarrierGenerator.C 1.3 2005/01/19 13:12:35-06:00 mikem@maya.cs.wisc.edu $
- *
- */
-
-#include "mem/ruby/tester/BarrierGenerator.hh"
-#include "mem/ruby/system/Sequencer.hh"
-#include "mem/ruby/system/System.hh"
-#include "mem/ruby/config/RubyConfig.hh"
-#include "mem/ruby/common/SubBlock.hh"
-#include "mem/ruby/tester/SyntheticDriver.hh"
-#include "mem/protocol/Chip.hh"
-
-BarrierGenerator::BarrierGenerator(NodeID node, SyntheticDriver& driver) :
- m_driver(driver)
-{
- m_status = BarrierGeneratorStatus_Thinking;
- m_last_transition = 0;
- m_node = node;
- m_counter = 0;
- proc_counter = 0;
- m_local_sense = false;
-
- m_total_think = 0;
- m_think_periods = 0;
-
- g_eventQueue_ptr->scheduleEvent(this, 1+(random() % 200));
-}
-
-BarrierGenerator::~BarrierGenerator()
-{
-}
-
-void BarrierGenerator::wakeup()
-{
- DEBUG_EXPR(TESTER_COMP, MedPrio, m_node);
- DEBUG_EXPR(TESTER_COMP, MedPrio, m_status);
-
- if (m_status == BarrierGeneratorStatus_Thinking) {
- m_barrier_done = false;
- m_local_sense = !m_local_sense;
- m_status = BarrierGeneratorStatus_Test_Pending;
- m_last_transition = g_eventQueue_ptr->getTime();
- initiateTest(); // Test
- } else if (m_status == BarrierGeneratorStatus_Test_Waiting) {
- m_status = BarrierGeneratorStatus_Test_Pending;
- m_last_transition = g_eventQueue_ptr->getTime();
- initiateTest(); // Test
- } else if (m_status == BarrierGeneratorStatus_Release_Waiting) {
- m_status = BarrierGeneratorStatus_Release_Pending;
- m_last_transition = g_eventQueue_ptr->getTime();
- initiateRelease(); // Test
- } else if (m_status == BarrierGeneratorStatus_StoreBarrierCounter_Waiting) {
- m_status = BarrierGeneratorStatus_StoreBarrierCounter_Pending;
- m_last_transition = g_eventQueue_ptr->getTime();
- initiateStoreCtr();
- } else if (m_status == BarrierGeneratorStatus_StoreFlag_Waiting) {
- m_status = BarrierGeneratorStatus_StoreFlag_Pending;
- m_last_transition = g_eventQueue_ptr->getTime();
- initiateStoreFlag();
- } else if (m_status == BarrierGeneratorStatus_Holding) {
- m_status = BarrierGeneratorStatus_Release_Pending;
- m_last_transition = g_eventQueue_ptr->getTime();
- initiateRelease(); // Release
- } else if (m_status == BarrierGeneratorStatus_Before_Swap) {
- m_status = BarrierGeneratorStatus_Swap_Pending;
- m_last_transition = g_eventQueue_ptr->getTime();
- initiateSwap();
- } else if (m_status == BarrierGeneratorStatus_SpinFlag_Ready) {
- m_status = BarrierGeneratorStatus_SpinFlag_Pending;
- m_last_transition = g_eventQueue_ptr->getTime();
- initiateLoadFlag();
- } else {
- WARN_EXPR(m_status);
- ERROR_MSG("Invalid status");
- }
-}
-
-void BarrierGenerator::performCallback(NodeID proc, SubBlock& data)
-{
- Address address = data.getAddress();
- assert(proc == m_node);
-
- DEBUG_EXPR(TESTER_COMP, LowPrio, proc);
- DEBUG_EXPR(TESTER_COMP, LowPrio, m_status);
- DEBUG_EXPR(TESTER_COMP, LowPrio, address);
- DEBUG_EXPR(TESTER_COMP, LowPrio, data);
-
- if (m_status == BarrierGeneratorStatus_Test_Pending) {
- uint8 dat = data.readByte();
- uint8 lock = dat >> 7;
- if (lock == 1) {
- // Locked - keep spinning
- m_status = BarrierGeneratorStatus_Test_Waiting;
- m_last_transition = g_eventQueue_ptr->getTime();
- g_eventQueue_ptr->scheduleEvent(this, waitTime());
- } else {
- // Unlocked - try the swap
- m_driver.recordTestLatency(g_eventQueue_ptr->getTime() - m_last_transition);
- m_status = BarrierGeneratorStatus_Before_Swap;
- m_last_transition = g_eventQueue_ptr->getTime();
- g_eventQueue_ptr->scheduleEvent(this, waitTime());
- }
- } else if (m_status == BarrierGeneratorStatus_Swap_Pending) {
- m_driver.recordSwapLatency(g_eventQueue_ptr->getTime() - m_last_transition);
- uint8 dat = data.readByte();
- uint8 lock = dat >> 7;
- if (lock == 1) {
- // We failed to aquire the lock
- m_status = BarrierGeneratorStatus_Test_Waiting;
- m_last_transition = g_eventQueue_ptr->getTime();
- g_eventQueue_ptr->scheduleEvent(this, waitTime());
- } else {
- // We acquired the lock
- dat = dat | 0x80;
- data.writeByte(dat);
- m_status = BarrierGeneratorStatus_StoreBarrierCounter_Waiting;
- m_last_transition = g_eventQueue_ptr->getTime();
- DEBUG_MSG(TESTER_COMP, HighPrio, "Acquired");
- DEBUG_EXPR(TESTER_COMP, HighPrio, proc);
- DEBUG_EXPR(TESTER_COMP, HighPrio, g_eventQueue_ptr->getTime());
- // g_eventQueue_ptr->scheduleEvent(this, holdTime());
-
- g_eventQueue_ptr->scheduleEvent(this, 1);
-
- // initiateLoadCtr();
- }
- } else if (m_status == BarrierGeneratorStatus_StoreBarrierCounter_Pending) {
-
- // if value == p, reset counter and set local sense flag
- uint8 ctr = data.readByte();
- //uint8 sense = ctr >> 4;
- ctr = ctr & 0x0F;
-
- ctr++;
- data.writeByte( ctr | 0x80); // store counter and lock
-
- //cout << m_node << " incremented Barrier_ctr to " << (int)ctr << ", " << data << "\n";
-
- if (ctr == (uint8) 16) {
-
- data.writeByte( 0x0 );
- m_status = BarrierGeneratorStatus_StoreFlag_Waiting;
- m_barrier_done = true;
-
- g_eventQueue_ptr->scheduleEvent(this, 1);
- }
- else {
-
- m_status = BarrierGeneratorStatus_Release_Waiting;
- g_eventQueue_ptr->scheduleEvent(this, 1);
- }
- } else if (m_status == BarrierGeneratorStatus_StoreFlag_Pending) {
-
- // write flag
- if (m_local_sense) {
- data.writeByte( 0x01 );
- }
- else {
- data.writeByte( 0x00 );
- }
-
- m_status = BarrierGeneratorStatus_Release_Waiting;
- g_eventQueue_ptr->scheduleEvent(this, 1);
-
- } else if (m_status == BarrierGeneratorStatus_Release_Pending) {
- m_driver.recordReleaseLatency(g_eventQueue_ptr->getTime() - m_last_transition);
- // We're releasing the lock
- uint8 dat = data.readByte();
- dat = dat & 0x7F;
- data.writeByte(dat);
-
- if (m_barrier_done) {
- m_counter++;
- proc_counter++;
- if (m_counter < g_tester_length) {
- m_status = BarrierGeneratorStatus_Thinking;
- m_last_transition = g_eventQueue_ptr->getTime();
- g_eventQueue_ptr->scheduleEvent(this, thinkTime());
- } else {
-
- m_driver.reportDone(proc_counter, m_node);
- m_last_transition = g_eventQueue_ptr->getTime();
- }
- }
- else {
- m_status = BarrierGeneratorStatus_SpinFlag_Ready;
- m_last_transition = g_eventQueue_ptr->getTime();
- g_eventQueue_ptr->scheduleEvent(this, waitTime());
- }
- } else if (m_status == BarrierGeneratorStatus_SpinFlag_Pending) {
-
- uint8 sense = data.readByte();
-
-
- if (sense != m_local_sense) {
- m_status = BarrierGeneratorStatus_SpinFlag_Ready;
- m_last_transition = g_eventQueue_ptr->getTime();
- g_eventQueue_ptr->scheduleEvent(this, waitTime());
- }
- else {
- m_counter++;
- proc_counter++;
- if (m_counter < g_tester_length) {
- m_status = BarrierGeneratorStatus_Thinking;
- m_last_transition = g_eventQueue_ptr->getTime();
- g_eventQueue_ptr->scheduleEvent(this, thinkTime());
- } else {
- m_driver.reportDone(proc_counter, m_node);
- m_status = BarrierGeneratorStatus_Done;
- m_last_transition = g_eventQueue_ptr->getTime();
- }
- }
-
- } else {
- WARN_EXPR(m_status);
- ERROR_MSG("Invalid status");
- }
-}
-
-int BarrierGenerator::thinkTime()
-{
- int ret;
- float ratio = g_think_fudge_factor;
-
- // return 400;
-
- if (ratio == 0) {
- return g_think_time;
- }
-
- int r = random();
- int x = (int) ( (float)g_think_time*ratio*2.0);
- int mod = r % x;
-
-
- int rand = ( mod+1 - ((float)g_think_time*ratio) );
-
- ret = (g_think_time + rand);
-
- m_total_think += ret;
- m_think_periods++;
-
- return ret;
-}
-
-int BarrierGenerator::waitTime() const
-{
- return g_wait_time;
-}
-
-
-void BarrierGenerator::initiateTest()
-{
- DEBUG_MSG(TESTER_COMP, MedPrio, "initiating Test");
- sequencer()->makeRequest(CacheMsg(Address(0x40), CacheRequestType_LD, Address(1), AccessModeType_UserMode, 1, PrefetchBit_No, 0, false));
-}
-
-void BarrierGenerator::initiateSwap()
-{
- DEBUG_MSG(TESTER_COMP, MedPrio, "initiating Swap");
- sequencer()->makeRequest(CacheMsg(Address(0x40), CacheRequestType_ATOMIC, Address(2), AccessModeType_UserMode, 1, PrefetchBit_No, 0, false));
-}
-
-void BarrierGenerator::initiateRelease()
-{
- DEBUG_MSG(TESTER_COMP, MedPrio, "initiating Release");
- sequencer()->makeRequest(CacheMsg(Address(0x40), CacheRequestType_ST, Address(3), AccessModeType_UserMode, 1, PrefetchBit_No, 0, false));
-}
-
-void BarrierGenerator::initiateLoadCtr()
-{
- DEBUG_MSG(TESTER_COMP, MedPrio, "initiating load of barrier counter");
- sequencer()->makeRequest(CacheMsg(Address(0x40), CacheRequestType_LD, Address(3), AccessModeType_UserMode, 1, PrefetchBit_No, 0, false));
-}
-
-void BarrierGenerator::initiateStoreCtr()
-{
- DEBUG_MSG(TESTER_COMP, MedPrio, "initiating load of barrier counter");
- sequencer()->makeRequest(CacheMsg(Address(0x40), CacheRequestType_ST, Address(3), AccessModeType_UserMode, 1, PrefetchBit_No, 0, false));
-}
-
-void BarrierGenerator::initiateStoreFlag()
-{
- DEBUG_MSG(TESTER_COMP, MedPrio, "initiating load of barrier counter");
- sequencer()->makeRequest(CacheMsg(Address(0x00), CacheRequestType_ST, Address(3), AccessModeType_UserMode, 1, PrefetchBit_No, 0, false));
-}
-
-void BarrierGenerator::initiateLoadFlag()
-{
- DEBUG_MSG(TESTER_COMP, MedPrio, "initiating load of barrier counter");
- sequencer()->makeRequest(CacheMsg(Address(0x00), CacheRequestType_LD, Address(3), AccessModeType_UserMode, 1, PrefetchBit_No, 0, false));
-}
-
-
-Sequencer* BarrierGenerator::sequencer() const
-{
- return g_system_ptr->getChip(m_node/RubyConfig::numberOfProcsPerChip())->getSequencer(m_node%RubyConfig::numberOfProcsPerChip());
-}
-
-void BarrierGenerator::print(ostream& out) const
-{
-}
-
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