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

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Date:	Sat, 29 Aug 2009 16:20:22 +0900
From:	Tatsuhiro Aoshima <tatsu.pc@...il.com>
To:	linux-kernel@...r.kernel.org
Cc:	tatsu.pc@...il.com, yoshfuji@...ux-ipv6.org,
	kosaki.motohiro@...fujitsu.com
Subject: [PATCH] proc: let task status file print utime and stime.

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.

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)
--
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