1 /*
2 * Copyright © 2019 Intel Corporation
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
13 * Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
21 * IN THE SOFTWARE.
22 *
23 */
24
25 #ifndef IGT_GPU_POWER_H
26 #define IGT_GPU_POWER_H
27
28 #include <stdbool.h>
29 #include <stdint.h>
30
31 struct gpu_power {
32 int fd;
33 double scale;
34 };
35
36 struct gpu_power_sample {
37 uint64_t energy;
38 uint64_t time;
39 };
40
41 int gpu_power_open(struct gpu_power *power);
42 bool gpu_power_read(struct gpu_power *power, struct gpu_power_sample *s);
43 void gpu_power_close(struct gpu_power *power);
44
gpu_power_J(const struct gpu_power * p,const struct gpu_power_sample * p0,const struct gpu_power_sample * p1)45 static inline double gpu_power_J(const struct gpu_power *p,
46 const struct gpu_power_sample *p0,
47 const struct gpu_power_sample *p1)
48 {
49 return (p1->energy - p0->energy) * p->scale;
50 }
51
gpu_power_s(const struct gpu_power * p,const struct gpu_power_sample * p0,const struct gpu_power_sample * p1)52 static inline double gpu_power_s(const struct gpu_power *p,
53 const struct gpu_power_sample *p0,
54 const struct gpu_power_sample *p1)
55 {
56 return (p1->time - p0->time) * 1e-9;
57 }
58
gpu_power_W(const struct gpu_power * p,const struct gpu_power_sample * p0,const struct gpu_power_sample * p1)59 static inline double gpu_power_W(const struct gpu_power *p,
60 const struct gpu_power_sample *p0,
61 const struct gpu_power_sample *p1)
62 {
63 return gpu_power_J(p, p0, p1) / gpu_power_s(p, p0, p1);
64 }
65
66 #endif /* IGT_GPU_POWER_H */
67