listening sockets as non sockets

[Sepherosa Ziehau]

On Thu, Feb 23, 2017 at 7:27 AM, Gleb Smirnoff <glebius at freebsd.org> wrote:
> On Tue, Feb 21, 2017 at 09:58:45AM +0100, Julien Charbon wrote:
> J> > T> 1) The patch worked pretty okay, but the idea of separate file type is
> J> > T>    abandoned. With current filedescriptor code it is almost impossible
> J> > T>    to racelessly switch fileops and f_data.
> J> > T>    For more details read the commit message, URL below.
> J> > T>
> J> > T> 2) I moved the work to git. It allows for easier code sharing.
> J> > T>
> J> > T> https://github.com/glebius/FreeBSD/commit/3a52df429889ea9c6e61013f6913aad95939f159
> J> >
> J> > The current 'solisten' branch at https://github.com/glebius/FreeBSD has
> J> > been running successfully for 48 hours at Netflix. But as mentioned before,
> J> > our connection rate is pretty low.
> J> >
> J> > So, testing from Julien and Hiren will be much appreciated.
> J>
> J>  Sound good, I will have spare time to get performance results on our
> J> side w/ and w/o your change before the end of this week.
>
> Thanks, Julien! Looking forward for your results. Meanwhile, the code has
> been running for a week on a single Netflix box. And for 24 hours on a
> set of boxes as A/B test against non-patched code. Since our connection
> rate is low, and we never seen accept_mtx to be a major problem in our
> profiling, the A/B test didn't show any statistically significant
> improvements. But my biased eye of course sees some improvements in the
> graphs :)

You can use this to force clients to generate 1 request/connection
(--connreqs 1) to test the accept queue contention for HTTP workload:
https://github.com/sepherosa/wrk

Checkout the sephe/wrk branch.  pkg install wrk.  Then gmake in the
checked out directory.

Thanks,
sephe

-- 
Tomorrow Will Never Die