1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66
|
#define _GNU_SOURCE
#include <sched.h>
#include <sys/types.h>
#include <sys/resource.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include "proc.h"
#include "die.h"
void cpu_affinity(int cpu)
{
int ret;
cpu_set_t cpu_bitmask;
CPU_ZERO(&cpu_bitmask);
CPU_SET(cpu, &cpu_bitmask);
ret = sched_setaffinity(getpid(), sizeof(cpu_bitmask),
&cpu_bitmask);
if (ret)
panic("Can't set this cpu affinity!\n");
}
int set_proc_prio(int priority)
{
int ret = setpriority(PRIO_PROCESS, getpid(), priority);
if (ret)
panic("Can't set nice val to %i!\n", priority);
return 0;
}
int set_sched_status(int policy, int priority)
{
int ret, min_prio, max_prio;
struct sched_param sp;
max_prio = sched_get_priority_max(policy);
min_prio = sched_get_priority_min(policy);
if (max_prio == -1 || min_prio == -1)
printf("Cannot determine scheduler prio limits!\n");
else if (priority < min_prio)
priority = min_prio;
else if (priority > max_prio)
priority = max_prio;
memset(&sp, 0, sizeof(sp));
sp.sched_priority = priority;
ret = sched_setscheduler(getpid(), policy, &sp);
if (ret) {
printf("Cannot set scheduler policy!\n");
return -EINVAL;
}
ret = sched_setparam(getpid(), &sp);
if (ret) {
printf("Cannot set scheduler prio!\n");
return -EINVAL;
}
return 0;
}
|