/fs/proc/loadavg.c

https://bitbucket.org/cyanogenmod/android_kernel_asus_tf300t · C · 47 lines · 40 code · 7 blank · 0 comment · 0 complexity · 98278127584d8d1356648982bf704e56 MD5 · raw file

  1. #include <linux/fs.h>
  2. #include <linux/init.h>
  3. #include <linux/pid_namespace.h>
  4. #include <linux/proc_fs.h>
  5. #include <linux/sched.h>
  6. #include <linux/seq_file.h>
  7. #include <linux/seqlock.h>
  8. #include <linux/time.h>
  9. #define LOAD_INT(x) ((x) >> FSHIFT)
  10. #define LOAD_FRAC(x) LOAD_INT(((x) & (FIXED_1-1)) * 100)
  11. static int loadavg_proc_show(struct seq_file *m, void *v)
  12. {
  13. unsigned long avnrun[3];
  14. unsigned long time_avnrun = avg_nr_running();
  15. get_avenrun(avnrun, FIXED_1/200, 0);
  16. seq_printf(m, "%lu.%02lu %lu.%02lu %lu.%02lu %ld/%d %d %lu.%02lu\n",
  17. LOAD_INT(avnrun[0]), LOAD_FRAC(avnrun[0]),
  18. LOAD_INT(avnrun[1]), LOAD_FRAC(avnrun[1]),
  19. LOAD_INT(avnrun[2]), LOAD_FRAC(avnrun[2]),
  20. nr_running(), nr_threads,
  21. task_active_pid_ns(current)->last_pid,
  22. LOAD_INT(time_avnrun), LOAD_FRAC(time_avnrun));
  23. return 0;
  24. }
  25. static int loadavg_proc_open(struct inode *inode, struct file *file)
  26. {
  27. return single_open(file, loadavg_proc_show, NULL);
  28. }
  29. static const struct file_operations loadavg_proc_fops = {
  30. .open = loadavg_proc_open,
  31. .read = seq_read,
  32. .llseek = seq_lseek,
  33. .release = single_release,
  34. };
  35. static int __init proc_loadavg_init(void)
  36. {
  37. proc_create("loadavg", 0, NULL, &loadavg_proc_fops);
  38. return 0;
  39. }
  40. module_init(proc_loadavg_init);