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Alexey Dobriyan
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Oct 23, 2008
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Original file line number | Diff line number | Diff line change |
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--- | ||
refs/heads/master: 6c2f91e077f1b60e7f83b7ee044f965f469cfdb3 | ||
refs/heads/master: 5b3acc8de8b2bc459afae6e09ada45c7e5b11bbf |
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#include <linux/fs.h> | ||
#include <linux/init.h> | ||
#include <linux/pid_namespace.h> | ||
#include <linux/proc_fs.h> | ||
#include <linux/sched.h> | ||
#include <linux/seq_file.h> | ||
#include <linux/seqlock.h> | ||
#include <linux/time.h> | ||
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#define LOAD_INT(x) ((x) >> FSHIFT) | ||
#define LOAD_FRAC(x) LOAD_INT(((x) & (FIXED_1-1)) * 100) | ||
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static int loadavg_proc_show(struct seq_file *m, void *v) | ||
{ | ||
int a, b, c; | ||
unsigned long seq; | ||
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do { | ||
seq = read_seqbegin(&xtime_lock); | ||
a = avenrun[0] + (FIXED_1/200); | ||
b = avenrun[1] + (FIXED_1/200); | ||
c = avenrun[2] + (FIXED_1/200); | ||
} while (read_seqretry(&xtime_lock, seq)); | ||
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seq_printf(m, "%d.%02d %d.%02d %d.%02d %ld/%d %d\n", | ||
LOAD_INT(a), LOAD_FRAC(a), | ||
LOAD_INT(b), LOAD_FRAC(b), | ||
LOAD_INT(c), LOAD_FRAC(c), | ||
nr_running(), nr_threads, | ||
task_active_pid_ns(current)->last_pid); | ||
return 0; | ||
} | ||
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static int loadavg_proc_open(struct inode *inode, struct file *file) | ||
{ | ||
return single_open(file, loadavg_proc_show, NULL); | ||
} | ||
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static const struct file_operations loadavg_proc_fops = { | ||
.open = loadavg_proc_open, | ||
.read = seq_read, | ||
.llseek = seq_lseek, | ||
.release = single_release, | ||
}; | ||
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static int __init proc_loadavg_init(void) | ||
{ | ||
proc_create("loadavg", 0, NULL, &loadavg_proc_fops); | ||
return 0; | ||
} | ||
module_init(proc_loadavg_init); |
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