How to set CPU affinity for a process from C or C++ in Linux?

by

You need to use sched_setaffinity(2).

For example, to run on CPUs 0 and 2 only:

#define _GNU_SOURCE
#include <sched.h>

cpu_set_t  mask;
CPU_ZERO(&mask);
CPU_SET(0, &mask);
CPU_SET(2, &mask);
int result = sched_setaffinity(0, sizeof(mask), &mask);

(0 for the first parameter means the current process, supply a PID if it’s some other process you want to control).

See also sched_getcpu(3).

More Related Contents:

  1. How to use sched_getaffinity and sched_setaffinity in Linux from C?
  2. How do I make this Linux program compile? [closed]
  3. Given an executable file, display its complete path [closed]
  4. Undefined reference to pthread_create in Linux
  5. Where is the header file on Linux? Why can’t I find ? [duplicate]
  6. Creating a daemon in Linux
  7. What is the behavior of printing NULL with printf’s %s specifier?
  8. What does malloc(0) return? [duplicate]
  9. strtok function thread safety
  10. Is it possible to determine the thread holding a mutex?
  11. What does __init mean in the Linux kernel code?
  12. How to use the addr2line command in Linux?
  13. How to execute a shell script from C in Linux?
  14. I do not understand how execlp() works in Linux
  15. How to get the current time in milliseconds from C in Linux?
  16. When to use pthread_exit() and when to use pthread_join() in Linux?
  17. Execute program from within a C program
  18. Beep on Linux in C
  19. Why does forking my process cause the file to be read infinitely
  20. What does a dot before the variable name in struct mean?
  21. How to do an atomic increment and fetch in C?
  22. Is this possible to customize printf?
  23. why C clock() returns 0
  24. CPU cache inhibition
  25. Check if process exists given its pid
  26. How do I reimplement (or wrap) a syscall function on Linux?
  27. How to use SO_KEEPALIVE option properly to detect that the client at the other end is down?
  28. Size of pid_t, uid_t, gid_t on Linux
  29. How to print exact value of the program counter in C
  30. How do I lock files using fopen()?

Leave a Comment