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// SPDX-License-Identifier: GPL-3.0-or-later
#include "../libnetdata.h"
// ----------------------------------------------------------------------------
// system functions
// to retrieve settings of the system
unsigned int system_hz;
void os_get_system_HZ(void) {
long ticks;
if ((ticks = sysconf(_SC_CLK_TCK)) == -1) {
netdata_log_error("Cannot get system clock ticks");
}
system_hz = (unsigned int) ticks;
}
static inline unsigned long cpuset_str2ul(char **s) {
unsigned long n = 0;
char c;
for(c = **s; c >= '0' && c <= '9' ; c = *(++*s)) {
n *= 10;
n += c - '0';
}
return n;
}
unsigned long os_read_cpuset_cpus(const char *filename, long system_cpus) {
static char *buf = NULL;
static size_t buf_size = 0;
if(!buf) {
buf_size = 100U + 6 * system_cpus + 1; // taken from kernel/cgroup/cpuset.c
buf = mallocz(buf_size);
}
int ret = read_txt_file(filename, buf, buf_size);
if(!ret) {
char *s = buf;
unsigned long ncpus = 0;
// parse the cpuset string and calculate the number of cpus the cgroup is allowed to use
while (*s) {
if (isspace((uint8_t)*s)) {
s++;
continue;
}
unsigned long n = cpuset_str2ul(&s);
ncpus++;
if(*s == ',') {
s++;
continue;
}
if(*s == '-') {
s++;
unsigned long m = cpuset_str2ul(&s);
ncpus += m - n; // calculate the number of cpus in the region
}
s++;
}
if(!ncpus)
return 0;
return ncpus;
}
return 0;
}
// =====================================================================================================================
// os_type
#if defined(OS_LINUX)
const char *os_type = "linux";
#endif
#if defined(OS_FREEBSD)
const char *os_type = "freebsd";
#endif
#if defined(OS_MACOS)
const char *os_type = "macos";
#endif
#if defined(OS_WINDOWS)
const char *os_type = "windows";
#endif
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