| /* |
| * 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 |