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module/cpu: use get_nprocs() to retrieve the CPU count

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Daniel Eklöf 2022-04-07 13:21:41 +02:00
parent 43de7c8da8
commit fce2787bdf
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GPG key ID: 5BBD4992C116573F
1 changed files with 4 additions and 28 deletions
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32
modules/cpu.c
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@ -10,6 +10,8 @@
#include <sys/time.h> #include <sys/time.h>
#include <time.h> #include <time.h>
#include <sys/sysinfo.h>
#define LOG_MODULE "cpu" #define LOG_MODULE "cpu"
#define LOG_ENABLE_DBG 0 #define LOG_ENABLE_DBG 0
#define SMALLEST_INTERVAL 500 #define SMALLEST_INTERVAL 500
@ -55,34 +57,8 @@ description(struct module *mod)
static uint32_t static uint32_t
get_cpu_nb_cores() get_cpu_nb_cores()
{ {
uint32_t nb_cores = 0; int nb_cores = get_nprocs();
FILE *fp = NULL; LOG_DBG("CPU count: %d", nb_cores);
char *line = NULL;
size_t len = 0;
ssize_t read;
fp = fopen("/proc/cpuinfo", "r");
if (NULL == fp) {
LOG_ERRNO("unable to open /proc/cpuinfo");
return 0;
}
while ((read = getline(&line, &len, fp)) != -1) {
if (strncmp(line, "siblings", sizeof("siblings") - 1) == 0) {
char *pos = (char *)memchr(line, ':', read);
if (pos == NULL) {
LOG_ERR("unable to parse siblings field to find the number of cores");
return 0;
}
errno = 0;
nb_cores = strtoul(pos + 1, NULL, 10);
if (errno == ERANGE) {
LOG_ERR("number of cores is out of range");
}
break;
}
}
fclose(fp);
free(line);
return nb_cores; return nb_cores;
} }