52 строки
1.2 KiB
C
52 строки
1.2 KiB
C
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#include <linux/fs.h>
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#include <linux/init.h>
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#include <linux/pid_namespace.h>
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#include <linux/proc_fs.h>
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#include <linux/sched.h>
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#include <linux/seq_file.h>
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#include <linux/seqlock.h>
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#include <linux/time.h>
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#define LOAD_INT(x) ((x) >> FSHIFT)
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#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)
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{
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int a, b, c;
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unsigned long seq;
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do {
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seq = read_seqbegin(&xtime_lock);
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a = avenrun[0] + (FIXED_1/200);
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b = avenrun[1] + (FIXED_1/200);
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c = avenrun[2] + (FIXED_1/200);
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} while (read_seqretry(&xtime_lock, seq));
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seq_printf(m, "%d.%02d %d.%02d %d.%02d %ld/%d %d\n",
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LOAD_INT(a), LOAD_FRAC(a),
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LOAD_INT(b), LOAD_FRAC(b),
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LOAD_INT(c), LOAD_FRAC(c),
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nr_running(), nr_threads,
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task_active_pid_ns(current)->last_pid);
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return 0;
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}
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static int loadavg_proc_open(struct inode *inode, struct file *file)
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{
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return single_open(file, loadavg_proc_show, NULL);
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}
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static const struct file_operations loadavg_proc_fops = {
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.open = loadavg_proc_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = single_release,
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};
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static int __init proc_loadavg_init(void)
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{
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proc_create("loadavg", 0, NULL, &loadavg_proc_fops);
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return 0;
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}
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module_init(proc_loadavg_init);
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