LXR linux/fs/proc/softirqs.c

   1#include <linux/init.h>
   2#include <linux/kernel_stat.h>
   3#include <linux/proc_fs.h>
   4#include <linux/seq_file.h>
   5
   6/*
   7 * /proc/softirqs  ... display the number of softirqs
   8 */
   9static int show_softirqs(struct seq_file *p, void *v)
  10{
  11        int i, j;
  12
  13        seq_puts(p, "                    ");
  14        for_each_possible_cpu(i)
  15                seq_printf(p, "CPU%-8d", i);
  16        seq_putc(p, '\n');
  17
  18        for (i = 0; i < NR_SOFTIRQS; i++) {
  19                seq_printf(p, "%12s:", softirq_to_name[i]);
  20                for_each_possible_cpu(j)
  21                        seq_printf(p, " %10u", kstat_softirqs_cpu(i, j));
  22                seq_putc(p, '\n');
  23        }
  24        return 0;
  25}
  26
  27static int softirqs_open(struct inode *inode, struct file *file)
  28{
  29        return single_open(file, show_softirqs, NULL);
  30}
  31
  32static const struct file_operations proc_softirqs_operations = {
  33        .open           = softirqs_open,
  34        .read           = seq_read,
  35        .llseek         = seq_lseek,
  36        .release        = single_release,
  37};
  38
  39static int __init proc_softirqs_init(void)
  40{
  41        proc_create("softirqs", 0, NULL, &proc_softirqs_operations);
  42        return 0;
  43}
  44module_init(proc_softirqs_init);
  45