linux-kernel - Re: [PATCH] proc: let task status file print utime and stime.

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Message-ID: <20090817023802.GF5039@cr0.nay.redhat.com>
Date:	Mon, 17 Aug 2009 10:38:02 +0800
From:	Amerigo Wang <xiyou.wangcong@...il.com>
To:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Tatsuhiro Aoshima <tatsu.pc@...il.com>,
	YOSHIFUJI Hideaki <yoshfuji@...ux-ipv6.org>
Subject: Re: [PATCH] proc: let task status file print utime and stime.

On Sat, Aug 15, 2009 at 11:36:41PM +0900, KOSAKI Motohiro wrote:
>From: Tatsuhiro Aoshima <tatsu.pc@...il.com>
>Subject: [PATCH] proc: let task status file print utime and stime.
>
>The task status file in proc file system did not contain
>user-time and system-time. Thus, users could not get
>those information of running task easily. I think
>these values should be provived in human readable format.
>By this patch, users can get stime and utime very easily.


Why? /proc/<pid>/stat already has these.


>
>Signed-off-by: Tatsuhiro Aoshima <tatsu.pc@...il.com>
>Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@...ux-ipv6.org>
>Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
>---
> fs/proc/array.c |   11 +++++++++--
> 1 files changed, 9 insertions(+), 2 deletions(-)
>
>diff --git a/fs/proc/array.c b/fs/proc/array.c
>index 725a650..29afa68 100644
>--- a/fs/proc/array.c
>+++ b/fs/proc/array.c
>@@ -162,6 +162,7 @@ static inline void task_state(struct seq_file *m, struct pid_namespace *ns,
> 	struct fdtable *fdt = NULL;
> 	const struct cred *cred;
> 	pid_t ppid, tpid;
>+	struct timeval utime, stime;
> 
> 	rcu_read_lock();
> 	ppid = pid_alive(p) ?
>@@ -173,6 +174,8 @@ static inline void task_state(struct seq_file *m, struct pid_namespace *ns,
> 			tpid = task_pid_nr_ns(tracer, ns);
> 	}
> 	cred = get_cred((struct cred *) __task_cred(p));
>+	cputime_to_timeval(task_utime(p), &utime);
>+	cputime_to_timeval(task_stime(p), &stime);
> 	seq_printf(m,
> 		"State:\t%s\n"
> 		"Tgid:\t%d\n"
>@@ -180,13 +183,17 @@ static inline void task_state(struct seq_file *m, struct pid_namespace *ns,
> 		"PPid:\t%d\n"
> 		"TracerPid:\t%d\n"
> 		"Uid:\t%d\t%d\t%d\t%d\n"
>-		"Gid:\t%d\t%d\t%d\t%d\n",
>+		"Gid:\t%d\t%d\t%d\t%d\n"
>+		"Utime:\t%lu.%06lu\n"
>+		"Stime:\t%lu.%06lu\n",
> 		get_task_state(p),
> 		task_tgid_nr_ns(p, ns),
> 		pid_nr_ns(pid, ns),
> 		ppid, tpid,
> 		cred->uid, cred->euid, cred->suid, cred->fsuid,
>-		cred->gid, cred->egid, cred->sgid, cred->fsgid);
>+		cred->gid, cred->egid, cred->sgid, cred->fsgid,
>+		(unsigned long) utime.tv_sec, (unsigned long) utime.tv_usec,
>+		(unsigned long) stime.tv_sec, (unsigned long) stime.tv_usec);
> 
> 	task_lock(p);
> 	if (p->files)
>-- 
>1.4.4.4
>
>
>
>--
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