lkml.org 
[lkml]   [2014]   [May]   [7]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH 2/3] perf tools: Cache dso data file descriptor

* Jiri Olsa <jolsa@redhat.com> wrote:

> On Sun, Apr 27, 2014 at 11:36:35PM +0900, Namhyung Kim wrote:
> > 2014-04-17 (목), 19:39 +0200, Jiri Olsa:
> > > Keeping the data file description open for the whole life
> > > of the dso object.
> >
> > I suspect there might be an issue for reporting very large data file
> > with this approach - like open file limit?
>
> I've got as high as ~200 openned file descriptors for
> ~2GB data of system wide monitoring

Note that 200 open file descriptors in themselves are not a
scalability problem on Linux, as long as perf doesn't walk them
linearly anywhere.

I think we are reasonably fast even with a million open files in a
singe process, or so.

Thanks,

Ingo
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2014-05-07 21:21    [W:0.132 / U:0.856 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site