Messages in this thread | | | Date | Wed, 7 May 2014 21:01:11 +0200 | From | Ingo Molnar <> | Subject | Re: [PATCH 2/3] perf tools: Cache dso data file descriptor |
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* 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/
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