e9fcfb3c16
Change-Id: I049f2e97ad00d76341c2aeeaa02279862a8a4d71 Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/25416 Maintainer: Gabe Black <gabeblack@google.com> Tested-by: kokoro <noreply+kokoro@google.com> Reviewed-by: Daniel Carvalho <odanrc@yahoo.com.br>
133 lines
4.5 KiB
Python
133 lines
4.5 KiB
Python
# Copyright (c) 2017 ARM Limited
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# All rights reserved.
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#
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# The license below extends only to copyright in the software and shall
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# not be construed as granting a license to any other intellectual
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# property including but not limited to intellectual property relating
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# to a hardware implementation of the functionality of the software
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# licensed hereunder. You may use the software subject to the license
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# terms below provided that you ensure that this notice is replicated
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# unmodified and in its entirety in all distributions of the software,
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# modified or unmodified, in source code or in binary form.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions are
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# met: redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer;
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# redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution;
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# neither the name of the copyright holders nor the names of its
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# contributors may be used to endorse or promote products derived from
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# this software without specific prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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# This configuration file extends the example ARM big.LITTLE(tm)
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# with example power models.
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from __future__ import print_function
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from __future__ import absolute_import
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import argparse
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import os
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import m5
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from m5.objects import MathExprPowerModel, PowerModel
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import fs_bigLITTLE as bL
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class CpuPowerOn(MathExprPowerModel):
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# 2A per IPC, 3pA per cache miss
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# and then convert to Watt
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dyn = "voltage * (2 * ipc + " \
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"3 * 0.000000001 * dcache.overall_misses / sim_seconds)"
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st = "4 * temp"
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class CpuPowerOff(MathExprPowerModel):
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dyn = "0"
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st = "0"
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class CpuPowerModel(PowerModel):
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pm = [
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CpuPowerOn(), # ON
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CpuPowerOff(), # CLK_GATED
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CpuPowerOff(), # SRAM_RETENTION
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CpuPowerOff(), # OFF
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]
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class L2PowerOn(MathExprPowerModel):
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# Example to report l2 Cache overall_accesses
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# The estimated power is converted to Watt and will vary based on the size of the cache
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dyn = "overall_accesses*0.000018000"
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st = "(voltage * 3)/10"
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class L2PowerOff(MathExprPowerModel):
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dyn = "0"
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st = "0"
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class L2PowerModel(PowerModel):
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# Choose a power model for every power state
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pm = [
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L2PowerOn(), # ON
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L2PowerOff(), # CLK_GATED
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L2PowerOff(), # SRAM_RETENTION
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L2PowerOff(), # OFF
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]
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def main():
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parser = argparse.ArgumentParser(
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description="Generic ARM big.LITTLE configuration with "\
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"example power models")
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bL.addOptions(parser)
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options = parser.parse_args()
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if options.cpu_type != "timing":
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m5.fatal("The power example script requires 'timing' CPUs.")
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root = bL.build(options)
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# Wire up some example power models to the CPUs
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for cpu in root.system.descendants():
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if not isinstance(cpu, m5.objects.BaseCPU):
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continue
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cpu.default_p_state = "ON"
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cpu.power_model = CpuPowerModel()
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# Example power model for the L2 Cache of the bigCluster
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for l2 in root.system.bigCluster.l2.descendants():
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if not isinstance(l2, m5.objects.Cache):
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continue
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l2.default_p_state = "ON"
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l2.power_model = L2PowerModel()
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bL.instantiate(options)
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print("*" * 70)
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print("WARNING: The power numbers generated by this script are "
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"examples. They are not representative of any particular "
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"implementation or process.")
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print("*" * 70)
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# Dumping stats periodically
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m5.stats.periodicStatDump(m5.ticks.fromSeconds(0.1E-3))
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bL.run()
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if __name__ == "__m5_main__":
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main()
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