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d3d64df21d
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>
44 lines
994 B
C
44 lines
994 B
C
#include <linux/init.h>
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#include <linux/kernel_stat.h>
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#include <linux/proc_fs.h>
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#include <linux/seq_file.h>
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/*
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* /proc/softirqs ... display the number of softirqs
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*/
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static int show_softirqs(struct seq_file *p, void *v)
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{
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int i, j;
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seq_printf(p, " ");
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for_each_possible_cpu(i)
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seq_printf(p, "CPU%-8d", i);
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seq_printf(p, "\n");
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for (i = 0; i < NR_SOFTIRQS; i++) {
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seq_printf(p, "%8s:", softirq_to_name[i]);
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for_each_possible_cpu(j)
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seq_printf(p, " %10u", kstat_softirqs_cpu(i, j));
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seq_printf(p, "\n");
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}
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return 0;
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}
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static int softirqs_open(struct inode *inode, struct file *file)
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{
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return single_open(file, show_softirqs, NULL);
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}
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static const struct file_operations proc_softirqs_operations = {
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.open = softirqs_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_softirqs_init(void)
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{
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proc_create("softirqs", 0, NULL, &proc_softirqs_operations);
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return 0;
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}
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module_init(proc_softirqs_init);
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