Re: sysbench throughput degradation in 4.13+

From: Peter Zijlstra
Date: Fri Sep 22 2017 - 11:53:58 EST

On Fri, Sep 22, 2017 at 11:03:39AM -0400, Eric Farman wrote:
> Hi Peter, Rik,
> With OSS last week, I'm sure this got lost in the deluge, so here's a
> friendly ping.

Very much so, inbox is a giant trainwreck ;-)

> I picked up 4.14.0-rc1 earlier this week, and still see the
> degradation described above. Not really a surprise, since I don't see any
> other commits in this area beyond the ones I mentioned in my original note.
> Anyway, I'm unsure what else to try or what doc to pull to help debug this,
> and would appreciate your expertise here. We can repro this pretty easily
> as necessary to help get to the bottom of this.
> Many thanks in advance,

Could you describe your sysbench setup? Are you running it on mysql or
postgresql, what other options?