Messages in this thread | | | Subject | Re: [tbench regression fixes]: digging out smelly deadmen. | From | Mike Galbraith <> | Date | Sat, 25 Oct 2008 07:53:05 +0200 |
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On Fri, 2008-10-24 at 22:15 -0700, David Miller wrote: > From: Mike Galbraith <efault@gmx.de> > Date: Sat, 25 Oct 2008 06:05:01 +0200 > > > My test data indicates (to me anyway) that there is another source of > > localhost throughput loss in .27. In that data, there is no hrtick > > overhead since I didn't have highres timers enabled, and computational > > costs added in .27 were removed. Dunno where it lives, but it does > > appear to exist. > > Disabling TSO on loopback doesn't fix that bit for you?
No. Those numbers are with TSO/GSO disabled.
I did a manual 100% sched and everything related revert to 26 scheduler, and had ~the same result as these numbers. 27 with 100% revert actually performed a bit _worse_ for me than 27 with it's overhead.. which puzzles me greatly.
-Mike
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