From: Mike Galbraith <efault@gmx.de>
To: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Evgeniy Polyakov <s0mbre@tservice.net.ru>,
netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
Ingo Molnar <mingo@elte.hu>, David Miller <davem@davemloft.net>
Subject: Re: [tbench regression fixes]: digging out smelly deadmen.
Date: Sat, 11 Oct 2008 20:13:50 +0200 [thread overview]
Message-ID: <1223748830.4598.16.camel@marge.simson.net> (raw)
In-Reply-To: <1223735947.8485.33.camel@twins>
On Sat, 2008-10-11 at 16:39 +0200, Peter Zijlstra wrote:
> That said, we can probably still avoid the division for the top level
> stuff, because the sum of the top level weights is still invariant
> between all tasks.
Less math would be nice of course...
> I'll have a stab at doing so... I initially didn't do this because my
> first try gave some real ugly code, but we'll see - these numbers are a
> very convincing reason to try again.
...but the numbers I get on Q6600 don't pin the tail on the math donkey.
Update to UP test log.
2.6.27-final-up
ring-test - 1.193 us/cycle = 838 KHz (gcc-4.3)
tbench - 337.377 MB/sec tso/gso on
tbench - 340.362 MB/sec tso/gso off
netperf - 120751.30 rr/s tso/gso on
netperf - 121293.48 rr/s tso/gso off
2.6.27-final-up
patches/revert_weight_and_asym_stuff.diff
ring-test - 1.133 us/cycle = 882 KHz (gcc-4.3)
tbench - 340.481 MB/sec tso/gso on
tbench - 343.472 MB/sec tso/gso off
netperf - 119486.14 rr/s tso/gso on
netperf - 121035.56 rr/s tso/gso off
2.6.28-up
ring-test - 1.149 us/cycle = 870 KHz (gcc-4.3)
tbench - 343.681 MB/sec tso/gso off
netperf - 122812.54 rr/s tso/gso off
My SMP log, updated to account for TSO/GSO monkey-wrench.
(<bleep> truckload of time <bleep> wasted chasing unbisectable
<bleepity-bleep> tso gizmo. <bleep!>)
SMP config, same as UP kernels tested, except SMP.
tbench -t 60 4 localhost followed by four 60 sec netperf
TCP_RR pairs, each pair on it's own core of my Q6600.
2.6.22.19
Throughput 1250.73 MB/sec 4 procs 1.00
16384 87380 1 1 60.01 111272.55 1.00
16384 87380 1 1 60.00 104689.58
16384 87380 1 1 60.00 110733.05
16384 87380 1 1 60.00 110748.88
2.6.22.19-cfs-v24.1
Throughput 1213.21 MB/sec 4 procs .970
16384 87380 1 1 60.01 108569.27 .992
16384 87380 1 1 60.01 108541.04
16384 87380 1 1 60.00 108579.63
16384 87380 1 1 60.01 108519.09
2.6.23.17
Throughput 1200.46 MB/sec 4 procs .959
16384 87380 1 1 60.01 95987.66 .866
16384 87380 1 1 60.01 92819.98
16384 87380 1 1 60.01 95454.00
16384 87380 1 1 60.01 94834.84
2.6.23.17-cfs-v24.1
Throughput 1238.68 MB/sec 4 procs .990
16384 87380 1 1 60.01 105871.52 .969
16384 87380 1 1 60.01 105813.11
16384 87380 1 1 60.01 106106.31
16384 87380 1 1 60.01 106310.20
2.6.24.7
Throughput 1204 MB/sec 4 procs .962
16384 87380 1 1 60.00 99599.27 .910
16384 87380 1 1 60.00 99439.95
16384 87380 1 1 60.00 99556.38
16384 87380 1 1 60.00 99500.45
2.6.25.17
Throughput 1223.16 MB/sec 4 procs .977
16384 87380 1 1 60.00 101768.95 .930
16384 87380 1 1 60.00 101888.46
16384 87380 1 1 60.01 101608.21
16384 87380 1 1 60.01 101833.05
2.6.26.5
Throughput 1183.47 MB/sec 4 procs .945
16384 87380 1 1 60.00 100837.12 .922
16384 87380 1 1 60.00 101230.12
16384 87380 1 1 60.00 100868.45
16384 87380 1 1 60.00 100491.41
numbers above here are gcc-4.1, below gcc-4.3
2.6.26.6
Throughput 1177.18 MB/sec 4 procs
16384 87380 1 1 60.00 100896.10
16384 87380 1 1 60.00 100028.16
16384 87380 1 1 60.00 101729.44
16384 87380 1 1 60.01 100341.26
TSO/GSO off
2.6.27-final
Throughput 1177.39 MB/sec 4 procs
16384 87380 1 1 60.00 98830.65
16384 87380 1 1 60.00 98722.47
16384 87380 1 1 60.00 98565.17
16384 87380 1 1 60.00 98633.03
2.6.27-final
patches/revert_weight_and_asym_stuff.diff
Throughput 1167.67 MB/sec 4 procs
16384 87380 1 1 60.00 97003.05
16384 87380 1 1 60.00 96758.42
16384 87380 1 1 60.00 96432.01
16384 87380 1 1 60.00 97060.98
2.6.28.git
Throughput 1173.14 MB/sec 4 procs
16384 87380 1 1 60.00 98449.33
16384 87380 1 1 60.00 98484.92
16384 87380 1 1 60.00 98657.98
16384 87380 1 1 60.00 98467.39
next prev parent reply other threads:[~2008-10-11 18:14 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
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 [this message]
2008-10-12 6:02 ` Mike Galbraith
2008-10-12 6:33 ` Mike Galbraith
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