Messages in this thread | | | Date | Sun, 5 Oct 2008 16:01:37 +0400 | From | Evgeniy Polyakov <> | Subject | Re: 2.6.27-rc8-git7: Reported regressions from 2.6.26 |
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On Sun, Oct 05, 2008 at 01:02:20PM +0200, Rafael J. Wysocki (rjw@sisk.pl) wrote: > > Just for the reference, this one regresses from the 2.6.23. > > Still, tbench results from 2.6.26 are better than from 2.6.27-rc. > That's why it's still on the list, but if you think that's not relevant, please > let me know and I'll drop it.
I meant it continuously regresses from .23 including 26-27 timeframe. There were at least two changes in 26-27 which caused tbench regression in this particular time interval. One of them enabled TSO over loopback by default, so one can turn it off via ethtools or this patch: http://marc.info/?l=linux-netdev&m=122263663631600&w=2
another (hopefully) one I'm trying to find out, which is a bit complex and slow, since e1000 driver changes in the middle of the 26-27 timeframe does not allow my testing machines to boot.
So, there is a regression (partially resolved), but it is only part of the problem.
-- Evgeniy Polyakov
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