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/*
* Copyright © 2019 Intel Corporation
*
* 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 (including the next
* paragraph) 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 IGT_GPU_POWER_H
#define IGT_GPU_POWER_H
#include <stdbool.h>
#include <stdint.h>
struct gpu_power {
int fd;
double scale;
};
struct gpu_power_sample {
uint64_t energy;
uint64_t time;
};
int gpu_power_open(struct gpu_power *power);
bool gpu_power_read(struct gpu_power *power, struct gpu_power_sample *s);
void gpu_power_close(struct gpu_power *power);
static inline double gpu_power_J(const struct gpu_power *p,
const struct gpu_power_sample *p0,
const struct gpu_power_sample *p1)
{
return (p1->energy - p0->energy) * p->scale;
}
static inline double gpu_power_s(const struct gpu_power *p,
const struct gpu_power_sample *p0,
const struct gpu_power_sample *p1)
{
return (p1->time - p0->time) * 1e-9;
}
static inline double gpu_power_W(const struct gpu_power *p,
const struct gpu_power_sample *p0,
const struct gpu_power_sample *p1)
{
return gpu_power_J(p, p0, p1) / gpu_power_s(p, p0, p1);
}
#endif /* IGT_GPU_POWER_H */
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