Possible Threading problem with -CURRENT / MySQL?
rwatson at freebsd.org
Wed Jun 16 06:43:14 GMT 2004
On Wed, 16 Jun 2004, Robert Watson wrote:
> On Wed, 16 Jun 2004, Robert Watson wrote:
> > Netperf-UP-giant 4902.41 14.3
> > Netperf-SMP-giant 2566.18 16.83
> > Netperf-UP-mpsafe 4799.35 22.04
> > Netperf-SMP-mpsafe 3022.51 18.06
> FYI, when I add ADAPTIVE_MUTEXES on this box, the mean of 3000 q/s goes
> to 4000 q/s on the netperf+smp+mpsafenet number.
> I'm off to bed now, but it seems like (at least in the HTT
> configuration), it makes a big difference. I'll run the remainder of
> that set with ADAPTIVE_MUTEXES tomorrow as well.
And switching to 4BSD from ULE takes the mean to 6426 q/s when combined
with netperf, smp, debug.mpsafenet=1, and adaptive mutexes.
(Keeping in mind that this mysql benchmark is basically an
inter-thread/process kernel IPC benchmark using UNIX domain sockets, since
the workload is fairly minimal in userspace, this makes reasonable sense).
Now I'm really going to bed.
Robert N M Watson FreeBSD Core Team, TrustedBSD Projects
robert at fledge.watson.org Senior Research Scientist, McAfee Research
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