47 lines
1.0 KiB
C
47 lines
1.0 KiB
C
/* test-schedbatch.c - Create a process using SCHED_BATCH scheduler
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* policy and nice value.
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* Compile: gcc -o test-schedbatch -Wall test-schedbatch.c
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* Usage: ./test-schedbatch [ <NICE> ]
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*
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* Author: Mike Fleetwood
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* https://bugzilla.redhat.com/show_bug.cgi?id=741090
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*/
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#define _GNU_SOURCE
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#include <stdlib.h>
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#include <stdio.h>
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#include <errno.h>
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#include <sched.h>
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#include <sys/time.h>
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#include <sys/resource.h>
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/* Defined in Linux headers only */
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#ifndef SCHED_BATCH
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#define SCHED_BATCH 3
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#endif
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int main(int argc, const char *argv[])
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{
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int nice = 19;
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struct sched_param sp;
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char msg[50];
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if (argc >= 2) {
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nice = atoi(argv[1]);
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}
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sp.sched_priority = 0;
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#ifdef SCHED_BATCH
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if (sched_setscheduler(0, SCHED_BATCH, &sp)) {
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perror("sched_setscheduler(0,SCHED_BATCH,{.sched_priority=0}");
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}
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#endif /* SCHED_BATCH */
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if (setpriority(PRIO_PROCESS, 0, nice) || errno) {
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(void)snprintf(msg, sizeof(msg),
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"setpriority(PRIO_PROCESS, 0, %d)", nice);
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perror(msg);
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}
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while (1) {
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getchar();
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}
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}
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