diff options
Diffstat (limited to 'src/sim')
| -rw-r--r-- | src/sim/ClockedObject.py | 29 | ||||
| -rw-r--r-- | src/sim/SConscript | 1 | ||||
| -rw-r--r-- | src/sim/clock_domain.cc | 2 | ||||
| -rw-r--r-- | src/sim/clocked_object.cc | 177 | ||||
| -rw-r--r-- | src/sim/clocked_object.hh | 59 | ||||
| -rw-r--r-- | src/sim/voltage_domain.cc | 2 |
6 files changed, 3 insertions, 267 deletions
diff --git a/src/sim/ClockedObject.py b/src/sim/ClockedObject.py index b933ea07a..2562f1f01 100644 --- a/src/sim/ClockedObject.py +++ b/src/sim/ClockedObject.py @@ -1,4 +1,4 @@ -# Copyright (c) 2012, 2015 ARM Limited +# Copyright (c) 2012 ARM Limited # All rights reserved. # # The license below extends only to copyright in the software and shall @@ -39,24 +39,6 @@ from m5.SimObject import SimObject from m5.params import * from m5.proxy import * -# Enumerate set of allowed power states that can be used by a clocked object. -# The list is kept generic to express a base minimal set. -# State definition :- -# Undefined: Invalid state, no power state derived information is available. -# On: The logic block is actively running and consuming dynamic and leakage -# energy depending on the amount of processing required. -# Clk_gated: The clock circuity within the block is gated to save dynamic -# energy, the power supply to the block is still on and leakage -# energy is being consumed by the block. -# Sram_retention: The SRAMs within the logic blocks are pulled into retention -# state to reduce leakage energy further. -# Off: The logic block is power gated and is not consuming any energy. -class PwrState(Enum): vals = ['UNDEFINED', - 'ON', - 'CLK_GATED', - 'SRAM_RETENTION', - 'OFF'] - class ClockedObject(SimObject): type = 'ClockedObject' abstract = True @@ -65,12 +47,3 @@ class ClockedObject(SimObject): # The clock domain this clocked object belongs to, inheriting the # parent's clock domain by default clk_domain = Param.ClockDomain(Parent.clk_domain, "Clock domain") - - # Provide initial power state, should ideally get redefined in startup - # routine - default_p_state = Param.PwrState("UNDEFINED", "Default Power State") - - p_state_clk_gate_min = Param.Latency('1ns', "Min value of the distribution") - p_state_clk_gate_max = Param.Latency('1s', "Max value of the distribution") - p_state_clk_gate_bins = Param.Unsigned('20', - "# bins in clk gated distribution") diff --git a/src/sim/SConscript b/src/sim/SConscript index e40c43f0c..3238301ed 100644 --- a/src/sim/SConscript +++ b/src/sim/SConscript @@ -69,7 +69,6 @@ Source('voltage_domain.cc') Source('linear_solver.cc') Source('system.cc') Source('dvfs_handler.cc') -Source('clocked_object.cc') if env['TARGET_ISA'] != 'null': SimObject('InstTracer.py') diff --git a/src/sim/clock_domain.cc b/src/sim/clock_domain.cc index 9865c4d11..1ccee7f1d 100644 --- a/src/sim/clock_domain.cc +++ b/src/sim/clock_domain.cc @@ -56,8 +56,6 @@ void ClockDomain::regStats() { - SimObject::regStats(); - using namespace Stats; // Expose the current clock period as a stat for observability in diff --git a/src/sim/clocked_object.cc b/src/sim/clocked_object.cc deleted file mode 100644 index 9a682a4ce..000000000 --- a/src/sim/clocked_object.cc +++ /dev/null @@ -1,177 +0,0 @@ -/* - * Copyright (c) 2015 ARM Limited - * All rights reserved - * - * The license below extends only to copyright in the software and shall - * not be construed as granting a license to any other intellectual - * property including but not limited to intellectual property relating - * to a hardware implementation of the functionality of the software - * licensed hereunder. You may use the software subject to the license - * terms below provided that you ensure that this notice is replicated - * unmodified and in its entirety in all distributions of the software, - * modified or unmodified, in source code or in binary form. - * - * 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: Akash Bagdia - * David Guillen Fandos - */ - -#include "sim/clocked_object.hh" - -#include "base/misc.hh" - -void -ClockedObject::serialize(CheckpointOut &cp) const -{ - unsigned int currPwrState = (unsigned int)_currPwrState; - - SERIALIZE_SCALAR(currPwrState); - SERIALIZE_SCALAR(prvEvalTick); -} - -void -ClockedObject::unserialize(CheckpointIn &cp) -{ - unsigned int currPwrState; - - UNSERIALIZE_SCALAR(currPwrState); - UNSERIALIZE_SCALAR(prvEvalTick); - - _currPwrState = Enums::PwrState(currPwrState); -} - -void -ClockedObject::pwrState(Enums::PwrState p) -{ - // Function should ideally be called only when there is a state change - if (_currPwrState == p) { - warn("ClockedObject: Already in the requested power state, request "\ - "ignored"); - return; - } - - // No need to compute stats if in the same tick, update state - // though. This can happen in cases like a) during start of the - // simulation multiple state changes happens in init/startup phase, - // b) one takes a decision to migrate state but decides to reverts - // back to the original state in the same tick if other conditions - // are not met elsewhere. Any state change related stats would have - // been recorded on previous call to the pwrState() function. - if (prvEvalTick == curTick()) { - warn("ClockedObject: More than one power state change request "\ - "encountered within the same simulation tick"); - _currPwrState = p; - return; - } - - // Record stats for previous state. - computeStats(); - - _currPwrState = p; - - numPwrStateTransitions++; -} - -void -ClockedObject::computeStats() -{ - // Calculate time elapsed from last (valid) state change - Tick elapsed_time = curTick() - prvEvalTick; - - pwrStateResidencyTicks[_currPwrState] += elapsed_time; - - // Time spent in CLK_GATED state, this might change depending on - // transition to other low power states in respective simulation - // objects. - if (_currPwrState == Enums::PwrState::CLK_GATED) { - pwrStateClkGateDist.sample(elapsed_time); - } - - prvEvalTick = curTick(); -} - -std::vector<double> -ClockedObject::pwrStateWeights() const -{ - // Get residency stats - std::vector<double> ret; - Stats::VCounter residencies; - pwrStateResidencyTicks.value(residencies); - - // Account for current state too! - Tick elapsed_time = curTick() - prvEvalTick; - residencies[_currPwrState] += elapsed_time; - - ret.resize(Enums::PwrState::Num_PwrState); - for (unsigned i = 0; i < Enums::PwrState::Num_PwrState; i++) - ret[i] = residencies[i] / - (pwrStateResidencyTicks.total() + elapsed_time); - - return ret; -} - -void -ClockedObject::regStats() -{ - SimObject::regStats(); - - using namespace Stats; - - numPwrStateTransitions - .name(params()->name + ".numPwrStateTransitions") - .desc("Number of power state transitions") - ; - - // Each sample is time in ticks - unsigned num_bins = std::max(params()->p_state_clk_gate_bins, 10U); - pwrStateClkGateDist - .init(params()->p_state_clk_gate_min, params()->p_state_clk_gate_max, - (params()->p_state_clk_gate_max / num_bins)) - .name(params()->name + ".pwrStateClkGateDist") - .desc("Distribution of time spent in the clock gated state") - .flags(pdf) - ; - - pwrStateResidencyTicks - .init(Enums::PwrState::Num_PwrState) - .name(params()->name + ".pwrStateResidencyTicks") - .desc("Cumulative time (in ticks) in various power states") - ; - for (int i = 0; i < Enums::PwrState::Num_PwrState; i++) { - pwrStateResidencyTicks.subname(i, Enums::PwrStateStrings[i]); - } - - numPwrStateTransitions = 0; - - /** - * For every stats dump, the power state residency and other distribution - * stats should be computed just before the dump to ensure correct stats - * value being reported for current dump window. It avoids things like - * having any unreported time spent in a power state to be forwarded to the - * next dump window which might have rather unpleasant effects (like - * perturbing the distribution stats). - */ - registerDumpCallback(new ClockedObjectDumpCallback(this)); -} diff --git a/src/sim/clocked_object.hh b/src/sim/clocked_object.hh index 1ba5ca617..b9a2481ec 100644 --- a/src/sim/clocked_object.hh +++ b/src/sim/clocked_object.hh @@ -1,5 +1,5 @@ /* - * Copyright (c) 2012-2013, 2015 ARM Limited + * Copyright (c) 2012-2013 ARM Limited * Copyright (c) 2013 Cornell University * All rights reserved * @@ -37,8 +37,6 @@ * * Authors: Andreas Hansson * Christopher Torng - * Akash Bagdia - * David Guillen Fandos */ /** @@ -49,10 +47,8 @@ #ifndef __SIM_CLOCKED_OBJECT_HH__ #define __SIM_CLOCKED_OBJECT_HH__ -#include "base/callback.hh" #include "base/intmath.hh" #include "base/misc.hh" -#include "enums/PwrState.hh" #include "params/ClockedObject.hh" #include "sim/core.hh" #include "sim/clock_domain.hh" @@ -237,58 +233,7 @@ class ClockedObject { public: ClockedObject(const ClockedObjectParams *p) - : SimObject(p), Clocked(*p->clk_domain), - _currPwrState(p->default_p_state), - prvEvalTick(0) - { } - - /** Parameters of ClockedObject */ - typedef ClockedObjectParams Params; - const Params* params() const - { return reinterpret_cast<const Params*>(_params); } - - void serialize(CheckpointOut &cp) const override; - void unserialize(CheckpointIn &cp) override; - - inline Enums::PwrState pwrState() const - { return _currPwrState; } - - inline std::string pwrStateName() const - { return Enums::PwrStateStrings[_currPwrState]; } - - /** Returns the percentage residency for each power state */ - std::vector<double> pwrStateWeights() const; - - /** - * Record stats values like state residency by computing the time - * difference from previous update. Also, updates the previous - * evaluation tick once all stats are recorded. - * Usually called on power state change and stats dump callback. - */ - void computeStats(); - - void pwrState(Enums::PwrState); - void regStats(); - - protected: - - /** To keep track of the current power state */ - Enums::PwrState _currPwrState; - - Tick prvEvalTick; - - Stats::Scalar numPwrStateTransitions; - Stats::Distribution pwrStateClkGateDist; - Stats::Vector pwrStateResidencyTicks; - -}; - -class ClockedObjectDumpCallback : public Callback -{ - ClockedObject *co; - public: - ClockedObjectDumpCallback(ClockedObject *co_t) : co(co_t) {} - virtual void process() { co->computeStats(); }; + : SimObject(p), Clocked(*p->clk_domain) { } }; #endif //__SIM_CLOCKED_OBJECT_HH__ diff --git a/src/sim/voltage_domain.cc b/src/sim/voltage_domain.cc index 61715dfbc..b82efda33 100644 --- a/src/sim/voltage_domain.cc +++ b/src/sim/voltage_domain.cc @@ -128,8 +128,6 @@ VoltageDomain::startup() { void VoltageDomain::regStats() { - SimObject::regStats(); - currentVoltage .method(this, &VoltageDomain::voltage) .name(params()->name + ".voltage") |