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/*
* Copyright (c) 2017 ARM Limited.
*
* SPDX-License-Identifier: MIT
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to
* deal in the Software without restriction, including without limitation the
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include "PMUCounter.h"
#include "Utils.h"
#define _GNU_SOURCE 1
#include <asm/unistd.h>
#include <csignal>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <fcntl.h>
#include <linux/hw_breakpoint.h>
#include <linux/perf_event.h>
#include <stdexcept>
#include <sys/ioctl.h>
#include <unistd.h>
namespace arm_compute
{
namespace test
{
namespace benchmark
{
CycleCounter::CycleCounter()
{
const pid_t pid = getpid();
struct perf_event_attr perf_config
{
};
memset(&perf_config, 0, sizeof(struct perf_event_attr));
perf_config.config = PERF_COUNT_HW_CPU_CYCLES;
perf_config.size = sizeof(struct perf_event_attr);
perf_config.type = PERF_TYPE_HARDWARE;
// The inherit bit specifies that this counter should count events of child
// tasks as well as the task specified
perf_config.inherit = 1;
// Enables saving of event counts on context switch for inherited tasks
perf_config.inherit_stat = 1;
_fd = syscall(__NR_perf_event_open, &perf_config, pid, -1, -1, 0);
if(_fd < 0)
{
throw std::runtime_error("perf_event_open for cycles failed");
}
}
std::string CycleCounter::id() const
{
return "Cycle Counter";
}
void CycleCounter::start()
{
ioctl(_fd, PERF_EVENT_IOC_RESET, 0);
ioctl(_fd, PERF_EVENT_IOC_ENABLE, 0);
}
void CycleCounter::stop()
{
ioctl(_fd, PERF_EVENT_IOC_DISABLE, 0);
read(_fd, &_cycles, sizeof(_cycles));
}
std::unique_ptr<Instrument::IMeasurement> CycleCounter::get_measurement() const
{
return ::arm_compute::test::cpp14::make_unique<Instrument::Measurement<long long>>(_cycles);
}
InstructionCounter::InstructionCounter()
{
const pid_t pid = getpid();
struct perf_event_attr perf_config
{
};
memset(&perf_config, 0, sizeof(struct perf_event_attr));
perf_config.config = PERF_COUNT_HW_INSTRUCTIONS;
perf_config.size = sizeof(struct perf_event_attr);
perf_config.type = PERF_TYPE_HARDWARE;
// The inherit bit specifies that this counter should count events of child
// tasks as well as the task specified
perf_config.inherit = 1;
// Enables saving of event counts on context switch for inherited tasks
perf_config.inherit_stat = 1;
_fd = syscall(__NR_perf_event_open, &perf_config, pid, -1, -1, 0);
if(_fd < 0)
{
throw std::runtime_error("perf_event_open for instructions failed");
}
}
std::string InstructionCounter::id() const
{
return "Instruction Counter";
}
void InstructionCounter::start()
{
ioctl(_fd, PERF_EVENT_IOC_RESET, 0);
ioctl(_fd, PERF_EVENT_IOC_ENABLE, 0);
}
void InstructionCounter::stop()
{
ioctl(_fd, PERF_EVENT_IOC_DISABLE, 0);
read(_fd, &_instructions, sizeof(_instructions));
}
std::unique_ptr<Instrument::IMeasurement> InstructionCounter::get_measurement() const
{
return std::unique_ptr<Instrument::IMeasurement>(new Instrument::Measurement<long long>(_instructions));
}
} // namespace benchmark
} // namespace test
} // namespace arm_compute
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