diff options
Diffstat (limited to 'man2/sched_setaffinity.2')
| -rw-r--r-- | man2/sched_setaffinity.2 | 39 |
1 files changed, 20 insertions, 19 deletions
diff --git a/man2/sched_setaffinity.2 b/man2/sched_setaffinity.2 index 6538b44ec..9389e099d 100644 --- a/man2/sched_setaffinity.2 +++ b/man2/sched_setaffinity.2 @@ -12,7 +12,7 @@ .\" 2008-11-12, mtk, removed CPU_*() macro descriptions to a .\" separate CPU_SET(3) page. .\" -.TH sched_setaffinity 2 2023-02-05 "Linux man-pages 6.03" +.TH sched_setaffinity 2 2023-05-03 "Linux man-pages 6.05.01" .SH NAME sched_setaffinity, sched_getaffinity \- \ set and get a thread's CPU affinity mask @@ -134,9 +134,12 @@ capability in the user namespace of the thread .TP .B ESRCH The thread whose ID is \fIpid\fP could not be found. -.SH VERSIONS -The CPU affinity system calls were introduced in Linux kernel 2.5.8. -The system call wrappers were introduced in glibc 2.3. +.SH STANDARDS +Linux. +.SH HISTORY +Linux 2.5.8, +glibc 2.3. +.PP Initially, the glibc interfaces included a .I cpusetsize argument, typed as @@ -145,8 +148,6 @@ In glibc 2.3.3, the .I cpusetsize argument was removed, but was then restored in glibc 2.3.4, with type .IR size_t . -.SH STANDARDS -These system calls are Linux-specific. .SH NOTES After a call to .BR sched_setaffinity (), @@ -350,50 +351,50 @@ sys 12.07 #include <stdlib.h> #include <sys/wait.h> #include <unistd.h> - +\& int main(int argc, char *argv[]) { int parentCPU, childCPU; cpu_set_t set; unsigned int nloops; - +\& if (argc != 4) { fprintf(stderr, "Usage: %s parent\-cpu child\-cpu num\-loops\en", argv[0]); exit(EXIT_FAILURE); } - +\& parentCPU = atoi(argv[1]); childCPU = atoi(argv[2]); nloops = atoi(argv[3]); - +\& CPU_ZERO(&set); - +\& switch (fork()) { case \-1: /* Error */ err(EXIT_FAILURE, "fork"); - +\& case 0: /* Child */ CPU_SET(childCPU, &set); - +\& if (sched_setaffinity(getpid(), sizeof(set), &set) == \-1) err(EXIT_FAILURE, "sched_setaffinity"); - +\& for (unsigned int j = 0; j < nloops; j++) getppid(); - +\& exit(EXIT_SUCCESS); - +\& default: /* Parent */ CPU_SET(parentCPU, &set); - +\& if (sched_setaffinity(getpid(), sizeof(set), &set) == \-1) err(EXIT_FAILURE, "sched_setaffinity"); - +\& for (unsigned int j = 0; j < nloops; j++) getppid(); - +\& wait(NULL); /* Wait for child to terminate */ exit(EXIT_SUCCESS); } |