a928a438b8
Used cppclean to help identify useless includes and removed them. This involved erroneously included headers, but also cases where forward declarations could have been used rather than a full include.
264 lines
9 KiB
C++
264 lines
9 KiB
C++
/*
|
|
* Copyright (c) 2013-2014 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: Vasileios Spiliopoulos
|
|
* Akash Bagdia
|
|
* Stephan Diestelhorst
|
|
*/
|
|
|
|
#include "sim/dvfs_handler.hh"
|
|
|
|
#include <set>
|
|
#include <utility>
|
|
|
|
#include "base/misc.hh"
|
|
#include "base/trace.hh"
|
|
#include "debug/DVFS.hh"
|
|
#include "params/DVFSHandler.hh"
|
|
#include "sim/clock_domain.hh"
|
|
#include "sim/eventq_impl.hh"
|
|
#include "sim/stat_control.hh"
|
|
#include "sim/voltage_domain.hh"
|
|
|
|
//
|
|
//
|
|
// DVFSHandler methods implementation
|
|
//
|
|
|
|
DVFSHandler::DVFSHandler(const Params *p)
|
|
: SimObject(p),
|
|
sysClkDomain(p->sys_clk_domain),
|
|
enableHandler(p->enable),
|
|
_transLatency(p->transition_latency)
|
|
{
|
|
// Check supplied list of domains for sanity and add them to the
|
|
// domain ID -> domain* hash
|
|
for (auto dit = p->domains.begin(); dit != p->domains.end(); ++dit) {
|
|
SrcClockDomain *d = *dit;
|
|
DomainID domain_id = d->domainID();
|
|
|
|
fatal_if(sysClkDomain == d, "DVFS: Domain config list has a "\
|
|
"system clk domain entry");
|
|
fatal_if(domain_id == SrcClockDomain::emptyDomainID,
|
|
"DVFS: Controlled domain %s needs to have a properly "\
|
|
" assigned ID.\n", d->name());
|
|
|
|
auto entry = std::make_pair(domain_id, d);
|
|
bool new_elem = domains.insert(entry).second;
|
|
fatal_if(!new_elem, "DVFS: Domain %s with ID %d does not have a "\
|
|
"unique ID.\n", d->name(), domain_id);
|
|
|
|
// Create a dedicated event slot per known domain ID
|
|
UpdateEvent *event = &updatePerfLevelEvents[domain_id];
|
|
event->domainIDToSet = d->domainID();
|
|
|
|
// Add domain ID to the list of domains
|
|
domainIDList.push_back(d->domainID());
|
|
}
|
|
UpdateEvent::dvfsHandler = this;
|
|
}
|
|
|
|
DVFSHandler *DVFSHandler::UpdateEvent::dvfsHandler;
|
|
|
|
DVFSHandler::DomainID
|
|
DVFSHandler::domainID(uint32_t index) const
|
|
{
|
|
fatal_if(index >= numDomains(), "DVFS: Requested index out of "\
|
|
"bound, max value %d\n", (domainIDList.size() - 1));
|
|
|
|
assert(domains.find(domainIDList[index]) != domains.end());
|
|
|
|
return domainIDList[index];
|
|
}
|
|
|
|
bool
|
|
DVFSHandler::validDomainID(DomainID domain_id) const
|
|
{
|
|
assert(isEnabled());
|
|
// This is ensure that the domain id as requested by the software is
|
|
// availabe in the handler.
|
|
if (domains.find(domain_id) != domains.end())
|
|
return true;
|
|
warn("DVFS: invalid domain ID %d, the DVFS handler does not handle this "\
|
|
"domain\n", domain_id);
|
|
return false;
|
|
}
|
|
|
|
bool
|
|
DVFSHandler::perfLevel(DomainID domain_id, PerfLevel perf_level)
|
|
{
|
|
assert(isEnabled());
|
|
|
|
DPRINTF(DVFS, "DVFS: setPerfLevel domain %d -> %d\n", domain_id, perf_level);
|
|
|
|
auto d = findDomain(domain_id);
|
|
if (!d->validPerfLevel(perf_level)) {
|
|
warn("DVFS: invalid performance level %d for domain ID %d, request "\
|
|
"ignored\n", perf_level, domain_id);
|
|
return false;
|
|
}
|
|
|
|
UpdateEvent *update_event = &updatePerfLevelEvents[domain_id];
|
|
// Drop an old DVFS change request once we have established that this is a
|
|
// reasonable request
|
|
if (update_event->scheduled()) {
|
|
DPRINTF(DVFS, "DVFS: Overwriting the previous DVFS event.\n");
|
|
deschedule(update_event);
|
|
}
|
|
|
|
update_event->perfLevelToSet = perf_level;
|
|
|
|
// State changes that restore to the current state (and / or overwrite a not
|
|
// yet completed in-flight request) will be squashed
|
|
if (d->perfLevel() == perf_level) {
|
|
DPRINTF(DVFS, "DVFS: Ignoring ineffective performance level change "\
|
|
"%d -> %d\n", d->perfLevel(), perf_level);
|
|
return false;
|
|
}
|
|
|
|
// At this point, a new transition will certainly take place -> schedule
|
|
Tick when = curTick() + _transLatency;
|
|
DPRINTF(DVFS, "DVFS: Update for perf event scheduled for %ld\n", when);
|
|
|
|
schedule(update_event, when);
|
|
return true;
|
|
}
|
|
|
|
void
|
|
DVFSHandler::UpdateEvent::updatePerfLevel()
|
|
{
|
|
// Perform explicit stats dump for power estimation before performance
|
|
// level migration
|
|
Stats::dump();
|
|
Stats::reset();
|
|
|
|
// Update the performance level in the clock domain
|
|
auto d = dvfsHandler->findDomain(domainIDToSet);
|
|
assert(d->perfLevel() != perfLevelToSet);
|
|
|
|
d->perfLevel(perfLevelToSet);
|
|
}
|
|
|
|
double
|
|
DVFSHandler::voltageAtPerfLevel(DomainID domain_id, PerfLevel perf_level) const
|
|
{
|
|
VoltageDomain *d = findDomain(domain_id)->voltageDomain();
|
|
assert(d);
|
|
PerfLevel n = d->numVoltages();
|
|
if (perf_level < n)
|
|
return d->voltage(perf_level);
|
|
|
|
// Request outside of the range of the voltage domain
|
|
if (n == 1) {
|
|
DPRINTF(DVFS, "DVFS: Request for perf-level %i for single-point "\
|
|
"voltage domain %s. Returning voltage at level 0: %.2f "\
|
|
"V\n", perf_level, d->name(), d->voltage(0));
|
|
// Special case for single point voltage domain -> same voltage for
|
|
// all points
|
|
return d->voltage(0);
|
|
}
|
|
|
|
warn("DVFSHandler %s reads illegal voltage level %u from "\
|
|
"VoltageDomain %s. Returning 0 V\n", name(), perf_level, d->name());
|
|
return 0.;
|
|
}
|
|
|
|
void
|
|
DVFSHandler::serialize(CheckpointOut &cp) const
|
|
{
|
|
//This is to ensure that the handler status is maintained during the
|
|
//entire simulation run and not changed from command line during checkpoint
|
|
//and restore
|
|
SERIALIZE_SCALAR(enableHandler);
|
|
|
|
// Pull out the hashed data structure into easy-to-serialise arrays;
|
|
// ensuring that the data associated with any pending update event is saved
|
|
std::vector<DomainID> domain_ids;
|
|
std::vector<PerfLevel> perf_levels;
|
|
std::vector<Tick> whens;
|
|
for (const auto &ev_pair : updatePerfLevelEvents) {
|
|
DomainID id = ev_pair.first;
|
|
const UpdateEvent *event = &ev_pair.second;
|
|
|
|
assert(id == event->domainIDToSet);
|
|
domain_ids.push_back(id);
|
|
perf_levels.push_back(event->perfLevelToSet);
|
|
whens.push_back(event->scheduled() ? event->when() : 0);
|
|
}
|
|
SERIALIZE_CONTAINER(domain_ids);
|
|
SERIALIZE_CONTAINER(perf_levels);
|
|
SERIALIZE_CONTAINER(whens);
|
|
}
|
|
|
|
void
|
|
DVFSHandler::unserialize(CheckpointIn &cp)
|
|
{
|
|
bool temp = enableHandler;
|
|
|
|
UNSERIALIZE_SCALAR(enableHandler);
|
|
|
|
if (temp != enableHandler) {
|
|
warn("DVFS: Forcing enable handler status to unserialized value of %d",
|
|
enableHandler);
|
|
}
|
|
|
|
// Reconstruct the map of domain IDs and their scheduled events
|
|
std::vector<DomainID> domain_ids;
|
|
std::vector<PerfLevel> perf_levels;
|
|
std::vector<Tick> whens;
|
|
UNSERIALIZE_CONTAINER(domain_ids);
|
|
UNSERIALIZE_CONTAINER(perf_levels);
|
|
UNSERIALIZE_CONTAINER(whens);
|
|
|
|
for (size_t i = 0; i < domain_ids.size(); ++i) {;
|
|
UpdateEvent *event = &updatePerfLevelEvents[domain_ids[i]];
|
|
|
|
event->domainIDToSet = domain_ids[i];
|
|
event->perfLevelToSet = perf_levels[i];
|
|
|
|
// Schedule all previously scheduled events
|
|
if (whens[i])
|
|
schedule(event, whens[i]);
|
|
}
|
|
UpdateEvent::dvfsHandler = this;
|
|
}
|
|
|
|
DVFSHandler*
|
|
DVFSHandlerParams::create()
|
|
{
|
|
return new DVFSHandler(this);
|
|
}
|