Re: Latest vfs scalability patch

Jens Axboe
2009-10-06T12:52:05Z

On Tue, Oct 06 2009, Peter Zijlstra wrote:
> On Tue, 2009-10-06 at 12:26 +0200, Jens Axboe wrote:
>
> > I did a quick perf analysis on that, but only on 8 clients (64 clients
> > basically causes perf to shit itself, it's just not functional).
>
> Even when used with -a so that you profile each cpu? I can imagine the
> cacheline contention from the inherited counters to render a 64 thread
> machine less than usable?

No, that's without -a. I used -a for perf top, and that has some impact
on performance while it's running, but millions of miles apart from what
it does without it :-)

--
Jens Axboe