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/*
* Copyright (c) 2022 Arm Limited. All rights reserved.
* SPDX-License-Identifier: Apache-2.0
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "Profiler.hpp"
#include "log_macros.h"
#include <cstring>
namespace arm {
namespace app {
Profiler::Profiler()
: Profiler("Unknown")
{}
Profiler::Profiler(const char* name)
: m_name(name)
{}
bool Profiler::StartProfiling(const char* name)
{
if (name) {
this->SetName(name);
}
if (!this->m_started) {
hal_pmu_reset();
this->m_tstampSt.initialised = false;
hal_pmu_get_counters(&this->m_tstampSt);
if (this->m_tstampSt.initialised) {
if (this->m_profStats.count(this->m_name) == 0) {
this->m_profStats.insert(
std::pair<std::string, std::vector<Statistics>>(
this->m_name, std::vector<Statistics>(this->m_tstampSt.num_counters))
);
}
this->m_started = true;
return true;
}
}
printf_err("Failed to start profiler %s\n", this->m_name.c_str());
return false;
}
bool Profiler::StopProfiling()
{
if (this->m_started) {
this->m_tstampEnd.initialised = false;
hal_pmu_get_counters(&this->m_tstampEnd);
this->m_started = false;
if (this->m_tstampEnd.initialised) {
this->UpdateRunningStats(
this->m_tstampSt,
this->m_tstampEnd,
this->m_name);
return true;
}
}
printf_err("Failed to stop profiler %s\n", this->m_name.c_str());
return false;
}
bool Profiler::StopProfilingAndReset()
{
if (this->StopProfiling()) {
this->Reset();
return true;
}
printf_err("Failed to stop profiler %s\n", this->m_name.c_str());
return false;
}
void Profiler::Reset()
{
this->m_started = false;
this->m_profStats.clear();
memset(&this->m_tstampSt, 0, sizeof(this->m_tstampSt));
memset(&this->m_tstampEnd, 0, sizeof(this->m_tstampEnd));
}
void calcProfilingStat(uint64_t currentValue,
Statistics& data)
{
data.total += currentValue;
data.min = std::min(data.min, currentValue);
data.max = std::max(data.max, currentValue);
data.avrg = (static_cast<double>(data.total) / data.samplesNum);
}
void Profiler::GetAllResultsAndReset(std::vector<ProfileResult>& results)
{
for (const auto& item: this->m_profStats) {
auto name = item.first;
std::vector<Statistics> series = item.second;
ProfileResult result{};
result.name = item.first;
for (Statistics& stat : series) {
result.samplesNum = stat.samplesNum;
result.data.emplace_back(stat);
}
results.emplace_back(result);
}
this->Reset();
}
void printStatisticsHeader(uint32_t samplesNum) {
info("Number of samples: %" PRIu32 "\n", samplesNum);
info("%s\n", "Total / Avg./ Min / Max");
}
void Profiler::PrintProfilingResult(bool printFullStat) {
std::vector<ProfileResult> results{};
GetAllResultsAndReset(results);
for(ProfileResult& result: results) {
if (!result.data.empty()) {
info("Profile for %s:\n", result.name.c_str());
if (printFullStat) {
printStatisticsHeader(result.samplesNum);
}
}
for (Statistics &stat: result.data) {
if (printFullStat) {
info("%s %s: %" PRIu64 "/ %.0f / %" PRIu64 " / %" PRIu64 " \n",
stat.name.c_str(), stat.unit.c_str(),
stat.total, stat.avrg, stat.min, stat.max);
} else {
info("%s: %.0f %s\n", stat.name.c_str(), stat.avrg, stat.unit.c_str());
}
}
}
}
void Profiler::SetName(const char* str)
{
this->m_name = std::string(str);
}
void Profiler::UpdateRunningStats(pmu_counters start, pmu_counters end,
const std::string& name)
{
struct ProfilingUnit unit = {
.counters = end
};
if (end.num_counters != start.num_counters ||
!end.initialised || !start.initialised) {
printf_err("Invalid start or end counters\n");
return;
}
for (size_t i = 0; i < unit.counters.num_counters; ++i) {
if (unit.counters.counters[i].value < start.counters[i].value) {
warn("Overflow detected for %s\n", unit.counters.counters[i].name);
unit.counters.counters[i].value = 0;
} else {
unit.counters.counters[i].value -= start.counters[i].value;
}
}
for (size_t i = 0; i < this->m_profStats[name].size(); ++i) {
this->m_profStats[name][i].name = unit.counters.counters[i].name;
this->m_profStats[name][i].unit = unit.counters.counters[i].unit;
++this->m_profStats[name][i].samplesNum;
calcProfilingStat(
unit.counters.counters[i].value,
this->m_profStats[name][i]);
}
ProfileResult result{};
result.name = this->m_name;
result.samplesNum = this->m_profStats[name][0].samplesNum;
for (Statistics& stat : this->m_profStats[name]) {
result.data.emplace_back(stat);
}
}
} /* namespace app */
} /* namespace arm */
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