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/**************************************************************************
*
* Copyright (C) 2016 Steven Toth <stoth@kernellabs.com>
* Copyright (C) 2016 Zodiac Inflight Innovations
* All Rights Reserved.
*
* 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, sub license, 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 NON-INFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS AND/OR ITS SUPPLIERS 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.
*
**************************************************************************/
#if HAVE_GALLIUM_EXTRA_HUD
/* Purpose:
* Reading /sys/devices/system/cpu/cpu?/cpufreq/scaling_???_freq
* cpu frequency (KHz), displaying on the HUD in Hz.
*/
#include "hud/hud_private.h"
#include "util/list.h"
#include "util/os_time.h"
#include "os/os_thread.h"
#include "util/u_memory.h"
#include <stdio.h>
#include <unistd.h>
#include <dirent.h>
#include <stdlib.h>
#include <errno.h>
#include <inttypes.h>
#include <sys/types.h>
#include <sys/stat.h>
struct cpufreq_info
{
struct list_head list;
int mode; /* CPUFREQ_MINIMUM, CPUFREQ_CURRENT, CPUFREQ_MAXIMUM */
char name[16]; /* EG. cpu0 */
int cpu_index;
/* EG. /sys/devices/system/cpu/cpu?/cpufreq/scaling_cur_freq */
char sysfs_filename[128];
uint64_t KHz;
uint64_t last_time;
};
static int gcpufreq_count = 0;
static struct list_head gcpufreq_list;
static mtx_t gcpufreq_mutex = _MTX_INITIALIZER_NP;
static struct cpufreq_info *
find_cfi_by_index(int cpu_index, int mode)
{
list_for_each_entry(struct cpufreq_info, cfi, &gcpufreq_list, list) {
if (cfi->mode != mode)
continue;
if (cfi->cpu_index == cpu_index)
return cfi;
}
return 0;
}
static int
get_file_value(const char *fn, uint64_t *KHz)
{
FILE *fh = fopen(fn, "r");
if (!fh) {
fprintf(stderr, "%s error: %s\n", fn, strerror(errno));
return -1;
}
int ret = fscanf(fh, "%" PRIu64 "", KHz);
fclose(fh);
return ret;
}
static void
query_cfi_load(struct hud_graph *gr)
{
struct cpufreq_info *cfi = gr->query_data;
uint64_t now = os_time_get();
if (cfi->last_time) {
if (cfi->last_time + gr->pane->period <= now) {
switch (cfi->mode) {
case CPUFREQ_MINIMUM:
case CPUFREQ_CURRENT:
case CPUFREQ_MAXIMUM:
get_file_value(cfi->sysfs_filename, &cfi->KHz);
hud_graph_add_value(gr, (uint64_t)cfi->KHz * 1000);
}
cfi->last_time = now;
}
} else {
/* initialize */
get_file_value(cfi->sysfs_filename, &cfi->KHz);
cfi->last_time = now;
}
}
/**
* Create and initialize a new object for a specific CPU.
* \param pane parent context.
* \param cpu_index CPU identifier Eg. 0 (CPU0)
* \param mode query CPUFREQ_MINIMUM | CURRENT | MAXIMUM statistic.
*/
void
hud_cpufreq_graph_install(struct hud_pane *pane, int cpu_index,
unsigned int mode)
{
struct hud_graph *gr;
struct cpufreq_info *cfi;
int num_cpus = hud_get_num_cpufreq(0);
if (num_cpus <= 0)
return;
cfi = find_cfi_by_index(cpu_index, mode);
if (!cfi)
return;
gr = CALLOC_STRUCT(hud_graph);
if (!gr)
return;
cfi->mode = mode;
switch(cfi->mode) {
case CPUFREQ_MINIMUM:
snprintf(gr->name, sizeof(gr->name), "%s-Min", cfi->name);
break;
case CPUFREQ_CURRENT:
snprintf(gr->name, sizeof(gr->name), "%s-Cur", cfi->name);
break;
case CPUFREQ_MAXIMUM:
snprintf(gr->name, sizeof(gr->name), "%s-Max", cfi->name);
break;
default:
return;
}
gr->query_data = cfi;
gr->query_new_value = query_cfi_load;
hud_pane_add_graph(pane, gr);
hud_pane_set_max_value(pane, 3000000 /* 3 GHz */);
}
static void
add_object(const char *name, const char *fn, int objmode, int cpu_index)
{
struct cpufreq_info *cfi = CALLOC_STRUCT(cpufreq_info);
strcpy(cfi->name, name);
strcpy(cfi->sysfs_filename, fn);
cfi->mode = objmode;
cfi->cpu_index = cpu_index;
list_addtail(&cfi->list, &gcpufreq_list);
gcpufreq_count++;
}
/**
* Initialize internal object arrays and display cpu freq HUD help.
* \param displayhelp true if the list of detected cpus should be
displayed on the console.
* \return number of detected CPU metrics (CPU count * 3)
*/
int
hud_get_num_cpufreq(bool displayhelp)
{
struct dirent *dp;
struct stat stat_buf;
char fn[128];
int cpu_index;
/* Return the number of CPU metrics we support. */
mtx_lock(&gcpufreq_mutex);
if (gcpufreq_count) {
mtx_unlock(&gcpufreq_mutex);
return gcpufreq_count;
}
/* Scan /sys/devices.../cpu, for every object type we support, create
* and persist an object to represent its different metrics.
*/
list_inithead(&gcpufreq_list);
DIR *dir = opendir("/sys/devices/system/cpu");
if (!dir) {
mtx_unlock(&gcpufreq_mutex);
return 0;
}
while ((dp = readdir(dir)) != NULL) {
/* Avoid 'lo' and '..' and '.' */
if (strlen(dp->d_name) <= 2)
continue;
if (sscanf(dp->d_name, "cpu%d\n", &cpu_index) != 1)
continue;
char basename[256];
snprintf(basename, sizeof(basename), "/sys/devices/system/cpu/%s", dp->d_name);
snprintf(fn, sizeof(fn), "%s/cpufreq/scaling_cur_freq", basename);
if (stat(fn, &stat_buf) < 0)
continue;
if (!S_ISREG(stat_buf.st_mode))
continue; /* Not a regular file */
snprintf(fn, sizeof(fn), "%s/cpufreq/scaling_min_freq", basename);
add_object(dp->d_name, fn, CPUFREQ_MINIMUM, cpu_index);
snprintf(fn, sizeof(fn), "%s/cpufreq/scaling_cur_freq", basename);
add_object(dp->d_name, fn, CPUFREQ_CURRENT, cpu_index);
snprintf(fn, sizeof(fn), "%s/cpufreq/scaling_max_freq", basename);
add_object(dp->d_name, fn, CPUFREQ_MAXIMUM, cpu_index);
}
closedir(dir);
if (displayhelp) {
list_for_each_entry(struct cpufreq_info, cfi, &gcpufreq_list, list) {
char line[128];
snprintf(line, sizeof(line), " cpufreq-%s-%s",
cfi->mode == CPUFREQ_MINIMUM ? "min" :
cfi->mode == CPUFREQ_CURRENT ? "cur" :
cfi->mode == CPUFREQ_MAXIMUM ? "max" : "undefined", cfi->name);
puts(line);
}
}
mtx_unlock(&gcpufreq_mutex);
return gcpufreq_count;
}
#endif /* HAVE_GALLIUM_EXTRA_HUD */
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