diff options
author | Keika Kobayashi <kobayashi.kk@ncos.nec.co.jp> | 2009-06-18 03:25:55 +0400 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-06-19 00:03:41 +0400 |
commit | d3d64df21d3d0de675a0d3ffa7c10514f3644b30 (patch) | |
tree | 7ea3c79d8adb2c0282327f9ce63208978857eb07 /fs | |
parent | 9d9b8fb0e5ebf4b0398e579f6061d4451fea3242 (diff) | |
download | linux-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')
-rw-r--r-- | fs/proc/Makefile | 1 | ||||
-rw-r--r-- | fs/proc/softirqs.c | 44 | ||||
-rw-r--r-- | fs/proc/stat.c | 15 |
3 files changed, 60 insertions, 0 deletions
diff --git a/fs/proc/Makefile b/fs/proc/Makefile index 63d965193b22..11a7b5c68153 100644 --- a/fs/proc/Makefile +++ b/fs/proc/Makefile @@ -18,6 +18,7 @@ proc-y += meminfo.o proc-y += stat.o proc-y += uptime.o proc-y += version.o +proc-y += softirqs.o proc-$(CONFIG_PROC_SYSCTL) += proc_sysctl.o proc-$(CONFIG_NET) += proc_net.o proc-$(CONFIG_PROC_KCORE) += kcore.o diff --git a/fs/proc/softirqs.c b/fs/proc/softirqs.c new file mode 100644 index 000000000000..1807c2419f17 --- /dev/null +++ b/fs/proc/softirqs.c @@ -0,0 +1,44 @@ +#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); 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; } |