Awesome!  And again I commend your thorough performance measurements.

--matt


On Wed, Nov 27, 2013 at 12:15 PM, Ned Bass <[email protected]> wrote:

> On Fri, Nov 22, 2013 at 02:07:48PM -0800, Ned Bass wrote:
> > Thanks, it's good to get confirmation that this was the problem.  I will
> > post updated results with the fix in place.
> >
> > Ned
>
> New benchmark results with patch 4347 are now available:
>
> https://github.com/nedbass/zfs/wiki/ZFS-Write-Throttle-Patch-Benchmarks
>
> The patch completely erased the problem I was seeing at high thread
> counts.  The new IO scheduler is a clear winner for many of the tests,
> and performs equally in the others.  This is very encouraging!  I also
> corrected the anomalous jumps in some of the performance curves of the
> original read tests, which were due to a flaw in my test scripts.
>
> For comparison, the original results are still available here:
>
>
> https://github.com/nedbass/zfs/wiki/**BROKEN**----ZFS-Write-Throttle-Patch-Benchmarks
>
> Ned
>
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