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/*
* Copyright (c) 2017-2019 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 <errno.h>
#include <linux/perf_event.h>
#include <stdexcept>
#include <sys/syscall.h>
#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.
*
* @param[in] config The default configuration.
*/
void open(uint64_t config);
/** Open the specified configuration.
*
* @param[in] perf_config 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));
if(result == -1)
{
ARM_COMPUTE_ERROR_VAR("Can't get PMU counter value: %d", errno);
}
return value;
}
} // namespace framework
} // namespace test
} // namespace arm_compute
#endif /* ARM_COMPUTE_TEST_PMU */
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