Re: How do you accurately determine a process' RAM usage?

[P@draigBrady.com]

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
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