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67 lines
2.1 KiB
67 lines
2.1 KiB
/*
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* Copyright © 2019 Intel Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is 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 (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* 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
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* THE 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
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*
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*/
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#ifndef IGT_GPU_POWER_H
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#define IGT_GPU_POWER_H
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#include <stdbool.h>
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#include <stdint.h>
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struct gpu_power {
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int fd;
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double scale;
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};
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struct gpu_power_sample {
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uint64_t energy;
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uint64_t time;
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};
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int gpu_power_open(struct gpu_power *power);
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bool gpu_power_read(struct gpu_power *power, struct gpu_power_sample *s);
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void gpu_power_close(struct gpu_power *power);
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static inline double gpu_power_J(const struct gpu_power *p,
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const struct gpu_power_sample *p0,
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const struct gpu_power_sample *p1)
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{
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return (p1->energy - p0->energy) * p->scale;
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}
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static inline double gpu_power_s(const struct gpu_power *p,
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const struct gpu_power_sample *p0,
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const struct gpu_power_sample *p1)
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{
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return (p1->time - p0->time) * 1e-9;
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}
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static inline double gpu_power_W(const struct gpu_power *p,
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const struct gpu_power_sample *p0,
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const struct gpu_power_sample *p1)
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{
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return gpu_power_J(p, p0, p1) / gpu_power_s(p, p0, p1);
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}
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#endif /* IGT_GPU_POWER_H */
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