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authorKeika Kobayashi <kobayashi.kk@ncos.nec.co.jp>2009-06-18 03:25:55 +0400
committerLinus Torvalds <torvalds@linux-foundation.org>2009-06-19 00:03:41 +0400
commitd3d64df21d3d0de675a0d3ffa7c10514f3644b30 (patch)
tree7ea3c79d8adb2c0282327f9ce63208978857eb07 /fs/proc/stat.c
parent9d9b8fb0e5ebf4b0398e579f6061d4451fea3242 (diff)
downloadlinux-d3d64df21d3d0de675a0d3ffa7c10514f3644b30.tar.xz
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>
Diffstat (limited to 'fs/proc/stat.c')
-rw-r--r--fs/proc/stat.c15
1 files changed, 15 insertions, 0 deletions
diff --git a/fs/proc/stat.c b/fs/proc/stat.c
index 81e4eb60972e..7cc726c6d70a 100644
--- a/fs/proc/stat.c
+++ b/fs/proc/stat.c
@@ -29,6 +29,8 @@ static int show_stat(struct seq_file *p, void *v)
cputime64_t user, nice, system, idle, iowait, irq, softirq, steal;
cputime64_t guest;
u64 sum = 0;
+ u64 sum_softirq = 0;
+ unsigned int per_softirq_sums[NR_SOFTIRQS] = {0};
struct timespec boottime;
unsigned int per_irq_sum;
@@ -53,6 +55,13 @@ static int show_stat(struct seq_file *p, void *v)
sum += kstat_irqs_cpu(j, i);
}
sum += arch_irq_stat_cpu(i);
+
+ for (j = 0; j < NR_SOFTIRQS; j++) {
+ unsigned int softirq_stat = kstat_softirqs_cpu(j, i);
+
+ per_softirq_sums[j] += softirq_stat;
+ sum_softirq += softirq_stat;
+ }
}
sum += arch_irq_stat();
@@ -115,6 +124,12 @@ static int show_stat(struct seq_file *p, void *v)
nr_running(),
nr_iowait());
+ seq_printf(p, "softirq %llu", (unsigned long long)sum_softirq);
+
+ for (i = 0; i < NR_SOFTIRQS; i++)
+ seq_printf(p, " %u", per_softirq_sums[i]);
+ seq_printf(p, "\n");
+
return 0;
}