kernel-ark/fs/proc/softirqs.c
Keika Kobayashi d3d64df21d proc: export statistics for softirq to /proc
Export statistics for softirq in /proc/softirqs and /proc/stat.

1. /proc/softirqs
Implement /proc/softirqs which shows the number of softirq
for each CPU like /proc/interrupts.

2. /proc/stat
Add the "softirq" line to /proc/stat.
This line shows the number of softirq for all cpu.
The first column is the total of all softirqs and
each subsequent column is the total for particular softirq.

[kosaki.motohiro@jp.fujitsu.com: remove redundant for_each_possible_cpu() loop]
Signed-off-by: Keika Kobayashi <kobayashi.kk@ncos.nec.co.jp>
Reviewed-by: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Eric Dumazet <dada1@cosmosbay.com>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-18 13:03:41 -07:00

45 lines
994 B
C

#include <linux/init.h>
#include <linux/kernel_stat.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
/*
* /proc/softirqs ... display the number of softirqs
*/
static int show_softirqs(struct seq_file *p, void *v)
{
int i, j;
seq_printf(p, " ");
for_each_possible_cpu(i)
seq_printf(p, "CPU%-8d", i);
seq_printf(p, "\n");
for (i = 0; i < NR_SOFTIRQS; i++) {
seq_printf(p, "%8s:", softirq_to_name[i]);
for_each_possible_cpu(j)
seq_printf(p, " %10u", kstat_softirqs_cpu(i, j));
seq_printf(p, "\n");
}
return 0;
}
static int softirqs_open(struct inode *inode, struct file *file)
{
return single_open(file, show_softirqs, NULL);
}
static const struct file_operations proc_softirqs_operations = {
.open = softirqs_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
static int __init proc_softirqs_init(void)
{
proc_create("softirqs", 0, NULL, &proc_softirqs_operations);
return 0;
}
module_init(proc_softirqs_init);