Re: [PATCH 0/5] futex: Wakeup optimizations

Mike Galbraith
2013-11-23T06:35:13Z

On Fri, 2013-11-22 at 21:55 -0800, Darren Hart wrote:
> On Fri, 2013-11-22 at 16:56 -0800, Davidlohr Bueso wrote:

> > This patchset has also been tested on smaller systems for a variety of
> > benchmarks, including java workloads, kernel builds and custom bang-the-hell-out-of
> > hb locks programs. So far, no functional or performance regressions have been seen.
> > Furthermore, no issues were found when running the different tests in the futextest
> > suite: http://git.kernel.org/cgit/linux/kernel/git/dvhart/futextest.git/
>
> Excellent. Would you be able to contribute any of these (C only please)
> to the stress test group?

FWIW, I plugged this series into an rt kernel (extra raciness) and beat
it up a bit on a 64 core box too. Nothing fell out, nor did futextest
numbers change outside variance (poor box has 8 whole gig ram, single
numa node, so kinda crippled/wimpy, and not good box for benchmarking).

What concerned me most about the series was 5/5.. looks like a great
idea to me, but the original thread did not have a happy ending.

-Mike