/fs/proc/loadavg.c
C | 47 lines | 40 code | 7 blank | 0 comment | 0 complexity | 98278127584d8d1356648982bf704e56 MD5 | raw file
Possible License(s): LGPL-2.0, AGPL-1.0, GPL-2.0
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 10#define LOAD_INT(x) ((x) >> FSHIFT) 11#define LOAD_FRAC(x) LOAD_INT(((x) & (FIXED_1-1)) * 100) 12 13static int loadavg_proc_show(struct seq_file *m, void *v) 14{ 15 unsigned long avnrun[3]; 16 unsigned long time_avnrun = avg_nr_running(); 17 18 get_avenrun(avnrun, FIXED_1/200, 0); 19 20 seq_printf(m, "%lu.%02lu %lu.%02lu %lu.%02lu %ld/%d %d %lu.%02lu\n", 21 LOAD_INT(avnrun[0]), LOAD_FRAC(avnrun[0]), 22 LOAD_INT(avnrun[1]), LOAD_FRAC(avnrun[1]), 23 LOAD_INT(avnrun[2]), LOAD_FRAC(avnrun[2]), 24 nr_running(), nr_threads, 25 task_active_pid_ns(current)->last_pid, 26 LOAD_INT(time_avnrun), LOAD_FRAC(time_avnrun)); 27 return 0; 28} 29 30static int loadavg_proc_open(struct inode *inode, struct file *file) 31{ 32 return single_open(file, loadavg_proc_show, NULL); 33} 34 35static const struct file_operations loadavg_proc_fops = { 36 .open = loadavg_proc_open, 37 .read = seq_read, 38 .llseek = seq_lseek, 39 .release = single_release, 40}; 41 42static int __init proc_loadavg_init(void) 43{ 44 proc_create("loadavg", 0, NULL, &loadavg_proc_fops); 45 return 0; 46} 47module_init(proc_loadavg_init);