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/*
Copyright (C) 2008- The University of Notre Dame
This software is distributed under the GNU General Public License.
See the file COPYING for details.
*/
#if defined(CCTOOLS_OPSYS_DARWIN)
#include <unistd.h>
#include <stdlib.h>
#include <sys/sysctl.h>
#include <sys/types.h>
void load_average_get(double *avg)
{
avg[0] = avg[1] = avg[2] = 0;
getloadavg(avg, 3);
}
int load_average_get_cpus()
{
int n;
size_t size = sizeof(n);
if(sysctlbyname("hw.physicalcpu", &n, &size, 0, 0) == 0) {
return n;
} else {
return 1;
}
}
#elif defined(CCTOOLS_OPSYS_LINUX)
#include <stdio.h>
#include <stdlib.h>
#include "stringtools.h"
#include "string_set.h"
void load_average_get(double *avg)
{
FILE *f;
avg[0] = avg[1] = avg[2] = 0;
f = fopen("/proc/loadavg", "r");
if(f) {
fscanf(f, "%lf %lf %lf", &avg[0], &avg[1], &avg[2]);
fclose(f);
}
}
int load_average_get_cpus()
{
struct string_set *cores;
cores = string_set_create(0, 0);
for (int i = 0; ; i++) {
char *p = string_format("/sys/devices/system/cpu/cpu%u/topology/thread_siblings", i);
FILE *f = fopen(p, "r");
free(p);
if (!f) break;
char line[1024];
int rc = fscanf(f, "%1023s", line);
fclose(f);
if (rc != 1) break;
string_set_push(cores, line);
}
int cpus = string_set_size(cores);
string_set_delete(cores);
if (cpus < 1) {
cpus = 1;
fprintf(stderr, "Unable to detect CPUs, falling back to 1\n");
}
return cpus;
}
#else
void load_average_get(double *avg)
{
avg[0] = avg[1] = avg[2] = 0;
}
int load_average_get_cpus()
{
return 1;
}
#endif
/* vim: set noexpandtab tabstop=4: */
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