mirror of
https://github.com/tiagovignatti/intel-gpu-tools.git
synced 2025-11-04 03:58:27 +00:00
8a8717eee3
The power metter was not showing up due to an erroneous check for a failure to open the i915 perf interface. Reported-by: Marius Vlad <marius.c.vlad@intel.com> Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
147 lines
3.3 KiB
C
147 lines
3.3 KiB
C
/*
|
|
* Copyright © 2013 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.
|
|
*
|
|
*/
|
|
|
|
#include <stdint.h>
|
|
#include <stdlib.h>
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
#include <fcntl.h>
|
|
#include <time.h>
|
|
#include <errno.h>
|
|
|
|
#include "perf.h"
|
|
#include "power.h"
|
|
#include "debugfs.h"
|
|
|
|
/* XXX Is this exposed through RAPL? */
|
|
|
|
static int perf_open(void)
|
|
{
|
|
struct perf_event_attr attr;
|
|
|
|
memset(&attr, 0, sizeof (attr));
|
|
|
|
attr.type = i915_type_id();
|
|
if (attr.type == 0)
|
|
return -1;
|
|
attr.config = I915_PERF_ENERGY;
|
|
|
|
attr.read_format = PERF_FORMAT_TOTAL_TIME_ENABLED;
|
|
return perf_event_open(&attr, -1, 0, -1, 0);
|
|
}
|
|
|
|
int power_init(struct power *power)
|
|
{
|
|
char buf[4096];
|
|
int fd, len;
|
|
|
|
memset(power, 0, sizeof(*power));
|
|
|
|
power->fd = perf_open();
|
|
if (power->fd != -1)
|
|
return 0;
|
|
|
|
sprintf(buf, "%s/i915_energy_uJ", debugfs_dri_path);
|
|
fd = open(buf, 0);
|
|
if (fd < 0)
|
|
return power->error = errno;
|
|
|
|
len = read(fd, buf, sizeof(buf));
|
|
close(fd);
|
|
|
|
if (len < 0)
|
|
return power->error = errno;
|
|
|
|
buf[len] = '\0';
|
|
if (strtoull(buf, 0, 0) == 0)
|
|
return power->error = EINVAL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static uint64_t file_to_u64(const char *name)
|
|
{
|
|
char buf[4096];
|
|
int fd, len;
|
|
|
|
sprintf(buf, "%s/%s", debugfs_dri_path, name);
|
|
fd = open(buf, 0);
|
|
if (fd < 0)
|
|
return 0;
|
|
|
|
len = read(fd, buf, sizeof(buf)-1);
|
|
close(fd);
|
|
|
|
if (len < 0)
|
|
return 0;
|
|
|
|
buf[len] = '\0';
|
|
|
|
return strtoull(buf, 0, 0);
|
|
}
|
|
|
|
static uint64_t clock_ms_to_u64(void)
|
|
{
|
|
struct timespec tv;
|
|
|
|
if (clock_gettime(CLOCK_MONOTONIC, &tv) < 0)
|
|
return 0;
|
|
|
|
return (uint64_t)tv.tv_sec * 1000 + tv.tv_nsec / 1000000;
|
|
}
|
|
|
|
int power_update(struct power *power)
|
|
{
|
|
struct power_stat *s = &power->stat[power->count++&1];
|
|
struct power_stat *d = &power->stat[power->count&1];
|
|
uint64_t d_time;
|
|
|
|
if (power->error)
|
|
return power->error;
|
|
|
|
if (power->fd != -1) {
|
|
uint64_t data[2];
|
|
int len;
|
|
|
|
len = read(power->fd, data, sizeof(data));
|
|
if (len < 0)
|
|
return power->error = errno;
|
|
|
|
s->energy = data[0];
|
|
s->timestamp = data[1] / (1000*1000);
|
|
} else {
|
|
s->energy = file_to_u64("i915_energy_uJ");
|
|
s->timestamp = clock_ms_to_u64();
|
|
}
|
|
|
|
if (power->count == 1)
|
|
return EAGAIN;
|
|
|
|
d_time = s->timestamp - d->timestamp;
|
|
power->power_mW = (s->energy - d->energy) / d_time;
|
|
power->new_sample = 1;
|
|
return 0;
|
|
}
|