From mboxrd@z Thu Jan  1 00:00:00 1970
From: Andi Kleen <andi@firstfloor.org>
Subject: Re: [RFC] [PATCH procfs] Add process age
Date: Mon, 26 Jul 2010 09:47:45 +0200
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Cc: Alexey Dobriyan <adobriyan@gmail.com>,
	torvalds@linux-foundation.org, linux-kernel@vger.kernel.org,
	linux-fsdevel@vger.kernel.org
To: dave.bueso@gmail.com
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In-Reply-To: <1279910830.1851.5.camel@cowboy> (Davidlohr Bueso's message of
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Davidlohr Bueso <dave.bueso@gmail.com> writes:

> On Fri, 2010-07-23 at 21:35 +0300, Alexey Dobriyan wrote:
>> On Fri, Jul 23, 2010 at 01:47:51PM -0400, Davidlohr Bueso wrote:
>> > This patch exports a process's age, in seconds, adding a /proc/#/age file.
>> 
>> What for?
>
> I have not found any straight way to get the run time of a processes,
> without having to interpret the start_time entry in /proc/#/stat and
> manually subtract the uptime from it.

That sounds like something an user space program should simply do.
Perhaps you can add it as a new optional "-o" field in "ps" ?

-Andi

-- 
ak@linux.intel.com -- Speaking for myself only.