From a1b759a29b6601a6031c3326416f5d7540eec95d Mon Sep 17 00:00:00 2001 From: Andreas Sandberg Date: Fri, 27 Apr 2018 19:02:55 +0100 Subject: configs: Update the DRAM sweep script to use PyTrafficGen Instead of generating a text configuration, use the new Python-based traffic generator. Change-Id: I6fb88ec45b74bb87470aa265af18b5a2ff24c314 Signed-off-by: Andreas Sandberg Reviewed-by: Nikos Nikoleris Reviewed-on: https://gem5-review.googlesource.com/11519 Reviewed-by: Jason Lowe-Power --- configs/dram/sweep.py | 58 ++++++++++++++++++++++----------------------------- 1 file changed, 25 insertions(+), 33 deletions(-) (limited to 'configs/dram/sweep.py') diff --git a/configs/dram/sweep.py b/configs/dram/sweep.py index 8380f74e3..10ef7486d 100644 --- a/configs/dram/sweep.py +++ b/configs/dram/sweep.py @@ -1,4 +1,4 @@ -# Copyright (c) 2014-2015 ARM Limited +# Copyright (c) 2014-2015, 2018 ARM Limited # All rights reserved. # # The license below extends only to copyright in the software and shall @@ -37,6 +37,7 @@ from __future__ import print_function +import math import optparse import m5 @@ -55,6 +56,11 @@ from common import MemConfig parser = optparse.OptionParser() +dram_generators = { + "DRAM" : lambda x: x.createDram, + "DRAM_ROTATE" : lambda x: x.createDramRot, +} + # Use a single-channel DDR3-1600 x64 (8x8 topology) by default parser.add_option("--mem-type", type="choice", default="DDR3_1600_8x8", choices=MemConfig.mem_names(), @@ -67,7 +73,7 @@ parser.add_option("--rd_perc", type="int", default=100, help = "Percentage of read commands") parser.add_option("--mode", type="choice", default="DRAM", - choices=["DRAM", "DRAM_ROTATE"], + choices=dram_generators.keys(), help = "DRAM: Random traffic; \ DRAM_ROTATE: Traffic rotating across banks and ranks") @@ -127,11 +133,6 @@ else: # short enough to avoid hitting a refresh period = 250000000 -# this is where we go off piste, and print the traffic generator -# configuration that we will later use, crazy but it works -cfg_file_name = "configs/dram/sweep.cfg" -cfg_file = open(cfg_file_name, 'w') - # stay in each state as long as the dump/reset period, use the entire # range, issue transactions of the right DRAM burst size, and match # the DRAM maximum bandwidth to ensure that it is saturated @@ -159,32 +160,8 @@ max_addr = mem_range.end # enough max_stride = min(512, page_size) -# now we create the state by iterating over the stride size from burst -# size to the max stride, and from using only a single bank up to the -# number of banks available -nxt_state = 0 -for bank in range(1, nbr_banks + 1): - for stride_size in range(burst_size, max_stride + 1, burst_size): - cfg_file.write("STATE %d %d %s %d 0 %d %d " - "%d %d %d %d %d %d %d %d %d\n" % - (nxt_state, period, options.mode, options.rd_perc, - max_addr, burst_size, itt, itt, 0, stride_size, - page_size, nbr_banks, bank, options.addr_map, - options.mem_ranks)) - nxt_state = nxt_state + 1 - -cfg_file.write("INIT 0\n") - -# go through the states one by one -for state in range(1, nxt_state): - cfg_file.write("TRANSITION %d %d 1\n" % (state - 1, state)) - -cfg_file.write("TRANSITION %d %d 1\n" % (nxt_state - 1, nxt_state - 1)) - -cfg_file.close() - # create a traffic generator, and point it to the file we just created -system.tgen = TrafficGen(config_file = cfg_file_name) +system.tgen = PyTrafficGen() # add a communication monitor system.monitor = CommMonitor() @@ -204,7 +181,22 @@ root = Root(full_system = False, system = system) root.system.mem_mode = 'timing' m5.instantiate() -m5.simulate(nxt_state * period) + +def trace(): + generator = dram_generators[options.mode](system.tgen) + for bank in range(1, nbr_banks + 1): + for stride_size in range(burst_size, max_stride + 1, burst_size): + num_seq_pkts = int(math.ceil(float(stride_size) / burst_size)) + yield generator(period, + 0, max_addr, burst_size, int(itt), int(itt), + options.rd_perc, 0, + num_seq_pkts, page_size, nbr_banks, bank, + options.addr_map, options.mem_ranks) + yield system.tgen.createExit(0) + +system.tgen.start(trace()) + +m5.simulate() print("DRAM sweep with burst: %d, banks: %d, max stride: %d" % (burst_size, nbr_banks, max_stride)) -- cgit v1.2.3