From: Mike Galbraith <efault@gmx.de>
To: David Miller <davem@davemloft.net>
Cc: rjw@sisk.pl, mingo@elte.hu, s0mbre@tservice.net.ru,
a.p.zijlstra@chello.nl, linux-kernel@vger.kernel.org,
netdev@vger.kernel.org
Subject: Re: [tbench regression fixes]: digging out smelly deadmen.
Date: Sat, 25 Oct 2008 08:53:43 +0200 [thread overview]
Message-ID: <1224917623.4929.15.camel@marge.simson.net> (raw)
In-Reply-To: <1224914333.3822.18.camel@marge.simson.net>
On Sat, 2008-10-25 at 07:58 +0200, Mike Galbraith wrote:
> On Fri, 2008-10-24 at 22:16 -0700, David Miller wrote:
> > If not, please bisect this.
>
> (oh my <fword> gawd:)
>
> I spent long day manweeks trying to bisect and whatnot. It's immune to
> my feeble efforts, and my git-foo.
but..
(tbench/netperf numbers were tested with gcc-4.1 at this time in log, I
went back and re-measured ring-test because I switched compilers)
2.6.22.19-up
ring-test - 1.204 us/cycle = 830 KHz (gcc-4.1)
ring-test - doorstop (gcc-4.3)
netperf - 147798.56 rr/s = 295 KHz (hmm, a bit unstable, 140K..147K rr/s)
tbench - 374.573 MB/sec
2.6.22.19-cfs-v24.1-up
ring-test - 1.098 us/cycle = 910 KHz (gcc-4.1)
ring-test - doorstop (gcc-4.3)
netperf - 140039.03 rr/s = 280 KHz = 3.57us - 1.10us sched = 2.47us/packet network
tbench - 364.191 MB/sec
2.6.23.17-up
ring-test - 1.252 us/cycle = 798 KHz (gcc-4.1)
ring-test - 1.235 us/cycle = 809 KHz (gcc-4.3)
netperf - 123736.40 rr/s = 247 KHz sb 268 KHZ / 134336.37 rr/s
tbench - 355.906 MB/sec
2.6.23.17-cfs-v24.1-up
ring-test - 1.100 us/cycle = 909 KHz (gcc-4.1)
ring-test - 1.074 us/cycle = 931 KHz (gcc-4.3)
netperf - 135847.14 rr/s = 271 KHz sb 280 KHz / 140039.03 rr/s
tbench - 364.511 MB/sec
2.6.24.7-up
ring-test - 1.100 us/cycle = 909 KHz (gcc-4.1)
ring-test - 1.068 us/cycle = 936 KHz (gcc-4.3)
netperf - 122300.66 rr/s = 244 KHz sb 280 KHz / 140039.03 rr/s
tbench - 341.523 MB/sec
2.6.25.17-up
ring-test - 1.163 us/cycle = 859 KHz (gcc-4.1)
ring-test - 1.129 us/cycle = 885 KHz (gcc-4.3)
netperf - 132102.70 rr/s = 264 KHz sb 275 KHz / 137627.30 rr/s
tbench - 361.71 MB/sec
..in 25, something happened that dropped my max context switch rate from
~930 KHz to ~885 KHz. Maybe I'll have better luck trying to find that.
Added to to-do list. Benchmark mysteries I'm going to have to leave
alone, they've kicked my little butt quite thoroughly ;-)
-Mike
next prev parent reply other threads:[~2008-10-25 6:54 UTC|newest]
Thread overview: 94+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-10-09 23:17 [tbench regression fixes]: digging out smelly deadmen Evgeniy Polyakov
2008-10-10 5:40 ` Peter Zijlstra
2008-10-10 8:09 ` Evgeniy Polyakov
2008-10-10 9:15 ` Ingo Molnar
2008-10-10 11:31 ` Evgeniy Polyakov
2008-10-10 11:40 ` Ingo Molnar
2008-10-10 13:25 ` Evgeniy Polyakov
2008-10-10 11:42 ` Ingo Molnar
2008-10-10 11:55 ` Evgeniy Polyakov
2008-10-10 11:57 ` Ingo Molnar
2008-10-24 22:25 ` Rafael J. Wysocki
2008-10-24 23:31 ` David Miller
2008-10-25 4:05 ` Mike Galbraith
2008-10-25 5:15 ` David Miller
2008-10-25 5:53 ` Mike Galbraith
2008-10-25 11:13 ` Rafael J. Wysocki
2008-10-26 3:55 ` David Miller
2008-10-26 11:33 ` Rafael J. Wysocki
2008-10-25 3:37 ` Mike Galbraith
2008-10-25 5:16 ` David Miller
2008-10-25 5:58 ` Mike Galbraith
2008-10-25 6:53 ` Mike Galbraith [this message]
2008-10-25 7:24 ` David Miller
2008-10-25 7:52 ` Mike Galbraith
2008-10-25 23:10 ` Jiri Kosina
2008-10-26 8:46 ` Mike Galbraith
2008-10-26 9:00 ` Peter Zijlstra
2008-10-26 9:11 ` Andrew Morton
2008-10-26 9:27 ` Evgeniy Polyakov
2008-10-26 9:34 ` Andrew Morton
2008-10-26 10:05 ` Evgeniy Polyakov
2008-10-27 2:34 ` David Miller
2008-10-27 9:30 ` Ingo Molnar
2008-10-27 9:57 ` David Miller
2008-10-26 10:23 ` Mike Galbraith
2008-10-26 19:03 ` Jiri Kosina
2008-10-27 9:29 ` Mike Galbraith
2008-10-27 10:42 ` Jiri Kosina
2008-10-27 11:27 ` Ingo Molnar
2008-10-27 11:33 ` Alan Cox
2008-10-27 12:06 ` Mike Galbraith
2008-10-27 13:42 ` Jiri Kosina
2008-10-27 14:17 ` Mike Galbraith
2008-10-27 18:33 ` Ingo Molnar
2008-10-27 19:39 ` Evgeniy Polyakov
2008-10-27 19:48 ` David Miller
2008-10-28 10:24 ` Mike Galbraith
2008-10-28 10:37 ` Ingo Molnar
2008-10-28 10:57 ` Mike Galbraith
2008-10-28 11:02 ` Ingo Molnar
2008-10-28 14:00 ` Mike Galbraith
2008-10-28 15:22 ` Mike Galbraith
2008-10-29 9:14 ` Evgeniy Polyakov
2008-10-29 9:50 ` Evgeniy Polyakov
2008-11-01 12:51 ` Paolo Ciarrocchi
2008-10-29 9:59 ` Nick Piggin
2008-10-26 9:15 ` Mike Galbraith
2008-10-25 7:19 ` David Miller
2008-10-25 7:33 ` Mike Galbraith
2008-10-27 17:26 ` Rick Jones
2008-10-27 19:11 ` Mike Galbraith
2008-10-27 19:18 ` Rick Jones
2008-10-27 19:44 ` Mike Galbraith
2008-10-26 11:29 ` Evgeniy Polyakov
2008-10-26 12:23 ` Evgeniy Polyakov
2008-10-30 18:15 ` Stephen Hemminger
2008-10-30 18:40 ` Evgeniy Polyakov
2008-10-30 18:43 ` Eric Dumazet
2008-10-30 18:56 ` Eric Dumazet
2008-10-30 19:01 ` Ilpo Järvinen
2008-10-31 7:52 ` David Miller
2008-10-31 9:40 ` Ilpo Järvinen
2008-10-31 9:51 ` David Miller
2008-10-31 10:42 ` Ilpo Järvinen
2008-10-31 10:45 ` Eric Dumazet
2008-10-31 11:01 ` Ilpo Järvinen
2008-10-31 11:10 ` Eric Dumazet
2008-10-31 11:15 ` Ilpo Järvinen
2008-10-31 19:57 ` Stephen Hemminger
2008-10-31 20:10 ` Evgeniy Polyakov
2008-10-31 21:03 ` Eric Dumazet
2008-10-31 21:18 ` Evgeniy Polyakov
2008-10-31 23:51 ` David Miller
2008-10-31 23:56 ` Stephen Hemminger
2008-11-01 0:16 ` Jay Vosburgh
2008-11-02 4:40 ` David Miller
2008-11-04 2:13 ` [PATCH net-next-2.6] bonding, net: Move last_rx update into bonding recv logic Jay Vosburgh
2008-11-04 2:17 ` David Miller
2008-10-10 10:13 ` [tbench regression fixes]: digging out smelly deadmen Mike Galbraith
2008-10-11 13:13 ` Evgeniy Polyakov
2008-10-11 14:39 ` Peter Zijlstra
2008-10-11 18:13 ` Mike Galbraith
2008-10-12 6:02 ` Mike Galbraith
2008-10-12 6:33 ` Mike Galbraith
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