linux-kernel - Re: [PATCH 2/3 v2] proc: Export statistics for softirq to /proc

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Message-ID: <4927EEBF.1060207@cosmosbay.com>
Date:	Sat, 22 Nov 2008 12:36:31 +0100
From:	Eric Dumazet <dada1@...mosbay.com>
To:	Keika Kobayashi <kobayashi.kk@...s.nec.co.jp>
CC:	linux-kernel@...r.kernel.org, akpm@...ux-foundation.org,
	h-shimamoto@...jp.nec.com
Subject: Re: [PATCH 2/3 v2] proc: Export statistics for softirq to /proc

Keika Kobayashi a écrit :
> 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.
> 
> Signed-off-by: Keika Kobayashi <kobayashi.kk@...s.nec.co.jp>
> Reviewed-by: Hiroshi Shimamoto <h-shimamoto@...jp.nec.com>
> ---
>  fs/proc/Makefile   |    1 +
>  fs/proc/softirqs.c |   57 ++++++++++++++++++++++++++++++++++++++++++++++++++++
>  fs/proc/stat.c     |   17 +++++++++++++++
>  3 files changed, 75 insertions(+), 0 deletions(-)
>  create mode 100644 fs/proc/softirqs.c
> 
> diff --git a/fs/proc/Makefile b/fs/proc/Makefile
> index 63d9651..11a7b5c 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 0000000..543f9d9
> --- /dev/null
> +++ b/fs/proc/softirqs.c
> @@ -0,0 +1,57 @@
> +#include <linux/init.h>
> +#include <linux/kernel_stat.h>
> +#include <linux/proc_fs.h>
> +#include <linux/seq_file.h>
> +
> +static const char *desc_array[] = {
> +	"HI",
> +	"TIMER",
> +	"NET_TX",
> +	"NET_RX",
> +	"BLOCK",
> +	"TASKLET",
> +	"SCHED",
> +#ifdef CONFIG_HIGH_RES_TIMERS
> +	"HRTIMER",
> +#endif
> +	"RCU"};
> +


You could use C99 initializers here

[HI_SOFTIRQ] = "HI",
[TIMER_SOFTIRQ] = "TIMER",
...

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