| /* |
| * 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 */ |