From: P@draigBrady.com
To: Andrew Morton <akpm@osdl.org>
Cc: linux-kernel@vger.kernel.org
Subject: Re: How do you accurately determine a process' RAM usage?
Date: Thu, 07 Jul 2005 09:26:31 +0100 [thread overview]
Message-ID: <42CCE737.70802@draigBrady.com> (raw)
In-Reply-To: <20050706181623.3729d208.akpm@osdl.org>
Andrew Morton wrote:
> Calculating this stuff accurately is very expensive. You'll get a better
> answer using proc-pid-smaps.patch from -mm, but even that won't tell you
> things about sharing levels of the pages.
Great, thanks! I'll play around with this:
http://kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.13-rc1/2.6.13-rc1-mm1/broken-out/proc-pid-smaps.patch
Looks like it's been stable for 4 months?
Given that it's an independent /proc/$pid/smaps file,
it only needs to be queried when required and so
I wouldn't worry too much about cost. `top` wouldn't use it
for e.g., but specialised tools like mine would.
--
Pádraig Brady - http://www.pixelbeat.org
--
next prev parent reply other threads:[~2005-07-07 8:29 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-07-06 18:55 How do you accurately determine a process' RAM usage? P
2005-07-07 1:16 ` Andrew Morton
2005-07-07 8:26 ` P [this message]
2005-07-07 8:40 ` Andrew Morton
2005-07-07 10:42 ` Hugh Dickins
2005-07-12 9:44 ` P
2005-07-19 20:09 ` Mauricio Lin
2005-07-20 14:34 ` P
2005-07-20 15:32 ` Mauricio Lin
2005-07-20 15:48 ` P
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