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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
13 static int loadavg_proc_show(struct seq_file *m, void *v)
14 {
15 unsigned long avnrun[3];
16
17 get_avenrun(avnrun, FIXED_1/200, 0);
18
19 seq_printf(m, "%lu.%02lu %lu.%02lu %lu.%02lu %ld/%d %d\n",
20 LOAD_INT(avnrun[0]), LOAD_FRAC(avnrun[0]),
21 LOAD_INT(avnrun[1]), LOAD_FRAC(avnrun[1]),
22 LOAD_INT(avnrun[2]), LOAD_FRAC(avnrun[2]),
23 nr_running(), nr_threads,
24 task_active_pid_ns(current)->last_pid);
25 return 0;
26 }
27
28 static int loadavg_proc_open(struct inode *inode, struct file *file)
29 {
30 return single_open(file, loadavg_proc_show, NULL);
31 }
32
33 static const struct file_operations loadavg_proc_fops = {
34 .open = loadavg_proc_open,
35 .read = seq_read,
36 .llseek = seq_lseek,
37 .release = single_release,
38 };
39
40 static int __init proc_loadavg_init(void)
41 {
42 proc_create("loadavg", 0, NULL, &loadavg_proc_fops);
43 return 0;
44 }
45 module_init(proc_loadavg_init);