107 lines
2.8 KiB
C++
107 lines
2.8 KiB
C++
/*
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* Copyright (c) 2017-2019 Arm Limited.
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*
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* SPDX-License-Identifier: MIT
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to
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* deal in the Software without restriction, including without limitation the
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* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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* sell copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#ifndef ARM_COMPUTE_TEST_PMU
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#define ARM_COMPUTE_TEST_PMU
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#include "arm_compute/core/Error.h"
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#include <cstdint>
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#include <errno.h>
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#include <linux/perf_event.h>
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#include <stdexcept>
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#include <sys/syscall.h>
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#include <unistd.h>
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namespace arm_compute
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{
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namespace test
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{
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namespace framework
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{
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/** Class provides access to CPU hardware counters. */
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class PMU
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{
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public:
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/** Default constructor. */
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PMU();
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/** Create PMU with specified counter.
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*
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* This constructor automatically calls @ref open with the default
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* configuration.
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*
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* @param[in] config Counter identifier.
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*/
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explicit PMU(uint64_t config);
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/** Default destructor. */
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~PMU();
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/** Get the counter value.
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*
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* @return Counter value casted to the specified type. */
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template <typename T>
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T get_value() const;
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/** Open the specified counter based on the default configuration.
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*
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* @param[in] config The default configuration.
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*/
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void open(uint64_t config);
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/** Open the specified configuration.
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*
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* @param[in] perf_config The specified configuration.
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*/
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void open(const perf_event_attr &perf_config);
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/** Close the currently open counter. */
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void close();
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/** Reset counter. */
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void reset();
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private:
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perf_event_attr _perf_config;
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long _fd{ -1 };
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};
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template <typename T>
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T PMU::get_value() const
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{
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T value{};
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const ssize_t result = read(_fd, &value, sizeof(T));
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if(result == -1)
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{
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ARM_COMPUTE_ERROR_VAR("Can't get PMU counter value: %d", errno);
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}
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return value;
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}
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} // namespace framework
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} // namespace test
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} // namespace arm_compute
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#endif /* ARM_COMPUTE_TEST_PMU */
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