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 */
show_softirqs(struct seq_file * p,void * v)9 static 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
softirqs_open(struct inode * inode,struct file * file)27 static int softirqs_open(struct inode *inode, struct file *file)
28 {
29 return single_open(file, show_softirqs, NULL);
30 }
31
32 static 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
proc_softirqs_init(void)39 static int __init proc_softirqs_init(void)
40 {
41 proc_create("softirqs", 0, NULL, &proc_softirqs_operations);
42 return 0;
43 }
44 fs_initcall(proc_softirqs_init);
45