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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_RAPL_H
#define IGT_RAPL_H
#include <stdbool.h>
#include <stdint.h>
struct rapl {
uint64_t power, type;
double scale;
int fd;
};
struct power_sample {
uint64_t energy;
uint64_t time;
};
int rapl_open(struct rapl *r, const char *domain);
static inline int cpu_power_open(struct rapl *r)
{
return rapl_open(r, "cpu");
}
static inline int gpu_power_open(struct rapl *r)
{
return rapl_open(r, "gpu");
}
static inline int pkg_power_open(struct rapl *r)
{
return rapl_open(r, "pkg");
}
static inline bool rapl_valid(struct rapl *r)
{
return r->fd >= 0;
}
static inline int ram_power_open(struct rapl *r)
{
return rapl_open(r, "ram");
}
static inline bool rapl_read(struct rapl *r, struct power_sample *s)
{
return read(r->fd, s, sizeof(*s)) == sizeof(*s);
}
static inline void rapl_close(struct rapl *r)
{
close(r->fd);
r->fd = -1;
}
static inline double power_J(const struct rapl *r,
const struct power_sample *p0,
const struct power_sample *p1)
{
return (p1->energy - p0->energy) * r->scale;
}
static inline double power_s(const struct rapl *r,
const struct power_sample *p0,
const struct power_sample *p1)
{
return (p1->time - p0->time) * 1e-9;
}
static inline double power_W(const struct rapl *r,
const struct power_sample *p0,
const struct power_sample *p1)
{
return power_J(r, p0, p1) / power_s(r, p0, p1);
}
#endif /* IGT_RAPL_H */
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