| /* |
| * 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. |
| */ |
| #ifndef ARM_COMPUTE_TEST_PMU |
| #define ARM_COMPUTE_TEST_PMU |
| |
| #include "arm_compute/core/Error.h" |
| |
| #include <cstdint> |
| #include <linux/perf_event.h> |
| #include <stdexcept> |
| #include <unistd.h> |
| |
| namespace arm_compute |
| { |
| namespace test |
| { |
| namespace framework |
| { |
| /** Class provides access to CPU hardware counters. */ |
| class PMU |
| { |
| public: |
| /** Default constructor. */ |
| PMU(); |
| |
| /** Create PMU with specified counter. |
| * |
| * This constructor automatically calls @ref open with the default |
| * configuration. |
| * |
| * @param[in] config Counter identifier. |
| */ |
| explicit PMU(uint64_t config); |
| |
| /** Default destructor. */ |
| ~PMU(); |
| |
| /** Get the counter value. |
| * |
| * @return Counter value casted to the specified type. */ |
| template <typename T> |
| T get_value() const; |
| |
| /** Open the specified counter based on the default configuration. */ |
| void open(uint64_t config); |
| |
| /** Open the specified configuration. */ |
| void open(const perf_event_attr &perf_config); |
| |
| /** Close the currently open counter. */ |
| void close(); |
| |
| /** Reset counter. */ |
| void reset(); |
| |
| private: |
| perf_event_attr _perf_config; |
| long _fd{ -1 }; |
| }; |
| |
| template <typename T> |
| T PMU::get_value() const |
| { |
| T value{}; |
| const ssize_t result = read(_fd, &value, sizeof(T)); |
| |
| ARM_COMPUTE_ERROR_ON_MSG(result == -1, "Can't get PMU counter value: %d", errno); |
| ARM_COMPUTE_UNUSED(result); |
| |
| return value; |
| } |
| } // namespace framework |
| } // namespace test |
| } // namespace arm_compute |
| #endif /* ARM_COMPUTE_TEST_PMU */ |