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cpu_dev.c
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cpu_dev.c
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/*************************************************************************************************************
This file is part of HWMonitor.
HWMonitor is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
HWMonitor is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with HWMonitor. If not, see <http://www.gnu.org/licenses/>.
*************************************************************************************************************/
#include <memory.h>
#include "cpu_dev.h"
#include "utils.h"
#include "allocators.h"
void cpu_dev_release_cb(void* p) {
zfree(p);
}
void cpu_dev_get(cpu_dev_t** cpu_dev) {
*cpu_dev = zalloc(sizeof(cpu_dev_t));
cpu_dev_t* cpu = *cpu_dev;
string* stat_s = NULL;
string_init(&stat_s);
file_read_line("/proc/stat", stat_s);
string_strip(stat_s);
list_t* cpu_stats = NULL;
string_split(stat_s, ' ', &cpu_stats);
string_release(stat_s);
list_iter_t* stat_it = NULL;
list_iter_init(cpu_stats, &stat_it);
list_iter_next(stat_it);
string* stat = NULL;
u64 istats[10];
u64 idx = 0;
while ((stat = list_iter_next(stat_it))) {
string_to_u64(stat, &istats[idx++]);
}
cpu->user = istats[0];
cpu->nice = istats[1];
cpu->system = istats[2];
cpu->idle = istats[3];
cpu->iowait = istats[4];
cpu->irc = istats[5];
cpu->softirc = istats[6];
cpu->steal = istats[7];
cpu->guest = istats[8];
cpu->guest_nice = istats[9];
list_iter_release(stat_it);
list_release(cpu_stats, true);
}
double cpu_dev_diff_usage(cpu_dev_t* a, cpu_dev_t* b) {
u64 prev_idle = a->idle + a->iowait;
u64 idle = b->idle + b->iowait;
u64 prev_non_idle = a->user + a->nice + a->system + a->irc + a->softirc + a->steal;
u64 non_idle = b->user + b->nice + b->system + b->irc + b->softirc + b->steal;
u64 prev_total = prev_idle + prev_non_idle;
u64 total = idle + non_idle;
u64 totald = total - prev_total;
u64 idled = idle - prev_idle;
double usage = (double)(totald - idled) / (double)totald;
return usage;
}
void cpu_info_release_cb(void* p) {
if (!p)
return;
cpu_info_t* cpui = (cpu_info_t*)p;
if (cpui->name)
string_release(cpui->name);
if (cpui->clock)
string_release(cpui->clock);
zfree(cpui);
}
void cpu_info_get(cpu_info_t** cpu_info) {
*cpu_info = zalloc(sizeof(cpu_info_t));
cpu_info_t* cpu = *cpu_info;
string* info_s = NULL;
string_init(&info_s);
file_read_all_buffered_s("/proc/cpuinfo", info_s);
list_t* lines = NULL;
string_split(info_s, '\n', &lines);
list_iter_t* lines_it = NULL;
list_iter_init(lines, &lines_it);
string* line;
u64 n_cpu = 0;
while ((line = list_iter_next(lines_it))) {
if (string_starts_with(line, "model name") == ST_OK) {
if (n_cpu > 0)
continue;
string_crop_tail(line, strlen("model name\t:"));
string_strip(line);
string_dub(line, &cpu->name);
}
if (string_starts_with(line, "cpu MHz") == ST_OK) {
if (n_cpu++ > 0)
continue;
string_crop_tail(line, strlen("cpu MHz\t: "));
string_strip(line);
string_dub(line, &cpu->clock);
}
}
cpu->cores = n_cpu;
list_iter_release(lines_it);
list_release(lines, true);
string_release(info_s);
}