From: Mike Galbraith <efault@gmx.de>
To: Christoph Lameter <cl@linux-foundation.org>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Kernel Testers List <kernel-testers@vger.kernel.org>
Subject: Re: [Bug #11308] tbench regression on each kernel release from 2.6.22 -> 2.6.28
Date: Mon, 15 Sep 2008 12:44:00 +0200 [thread overview]
Message-ID: <1221475440.4784.39.camel@marge.simson.net> (raw)
In-Reply-To: <1221421907.4597.24.camel@marge.simson.net>
On Sun, 2008-09-14 at 21:51 +0200, Mike Galbraith wrote:
> On Sun, 2008-09-14 at 09:18 -0500, Christoph Lameter wrote:
> > Mike Galbraith wrote:
> > > Numbers from my Q6600 Aldi supermarket box (hm, your box is from different shelf)
> > >
> > My box is an 8p with recent quad core processors. 8G, 32bit Linux.
>
> Don't hold your breath, but after putting my network config of a very
> severe diet, I'm starting to see something resembling sensible results.
Turns off all netfilter options except tables, etc.
Since 2.6.22.19-cfs-v24.1 and 2.6.23.17-cfs-v24.1 schedulers are
identical, and these are essentially identical with 2.6.24.7, what I
read from numbers below is that cfs in 2.6.23 was somewhat less than
wonderful for either netperf or tbench, Something happened somewhere
other than the scheduler at 23->24 which cost us some performance, and
another something happened at 26->27. I'll likely go looking again..
and likely regret it again ;-)
Math ain't free is part of it, though apparently not much. For me,
tbench regression 22->27 is ~10%, and netperf regression is ~16%.
Data:
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 1204.14 MB/sec 4 procs .962
16384 87380 1 1 60.01 101799.85 .929
16384 87380 1 1 60.01 101659.41
16384 87380 1 1 60.01 101628.78
16384 87380 1 1 60.01 101700.53
wakeup granularity = 0 (make scheduler as preempt happy as 2.6.22 is)
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 1192.49 MB/sec 4 procs .953
16384 87380 1 1 60.00 91124.67 .866
16384 87380 1 1 60.00 93124.38
16384 87380 1 1 60.01 92249.69
16384 87380 1 1 60.01 91103.12
wakeup granularity = 0
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 1242.47 MB/sec 4 procs .993
16384 87380 1 1 60.00 101728.34 .931
16384 87380 1 1 60.00 101930.23
16384 87380 1 1 60.00 101803.15
16384 87380 1 1 60.00 101908.29
wakeup granularity = 0
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 1202.49 MB/sec 4 procs .961
16384 87380 1 1 60.00 94643.23 .868
16384 87380 1 1 60.00 94754.37
16384 87380 1 1 60.00 94909.77
16384 87380 1 1 60.00 95457.41
wakeup granularity = 0
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 1220.47 MB/sec 4 procs .975
16384 87380 1 1 60.00 94641.06 .867
16384 87380 1 1 60.00 94864.87
16384 87380 1 1 60.01 95033.81
16384 87380 1 1 60.00 94863.49
wakeup granularity = 0
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 1182.24 MB/sec 4 procs .945
16384 87380 1 1 60.00 93814.75 .854
16384 87380 1 1 60.00 94173.41
16384 87380 1 1 60.00 92925.24
16384 87380 1 1 60.00 93002.51
wakeup granularity = 0
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
2.6.27
Throughput 1088.17 MB/sec 4 procs .870
16384 87380 1 1 60.00 84225.59 .766
16384 87380 1 1 60.00 83362.65
16384 87380 1 1 60.00 84060.73
16384 87380 1 1 60.00 83462.72
wakeup granularity = 0
Throughput 1116.22 MB/sec 4 procs .892
16384 87380 1 1 60.00 92502.44 .841
16384 87380 1 1 60.01 92213.72
16384 87380 1 1 60.00 91445.86
16384 87380 1 1 60.00 91832.84
revert sched weight/asym changes, gran = 0
Throughput 1149.16 MB/sec 4 proc .918
16384 87380 1 1 60.00 94824.92 .868
16384 87380 1 1 60.01 94579.45
16384 87380 1 1 60.01 95284.94
16384 87380 1 1 60.01 95228.22
Weight/asym changes cost ~3%. Mysql+oltp agrees. Preempt happy loads
lose a bit, preempt haters gain a bit. Performance shift.
next prev parent reply other threads:[~2008-09-15 10:44 UTC|newest]
Thread overview: 191+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-09-12 18:59 2.6.27-rc6-git2: Reported regressions from 2.6.26 Rafael J. Wysocki
2008-09-12 18:59 ` [Bug #11207] VolanoMark regression with 2.6.27-rc1 Rafael J. Wysocki
2008-09-12 19:06 ` [Bug #11220] Screen stays black after resume Rafael J. Wysocki
2008-09-12 19:06 ` [Bug #11215] INFO: possible recursive locking detected ps2_command Rafael J. Wysocki
2008-09-12 19:06 ` [Bug #11210] libata badness Rafael J. Wysocki
2008-09-12 19:06 ` [Bug #11237] corrupt PMD after resume Rafael J. Wysocki
2008-09-12 19:06 ` [Bug #11230] Kconfig no longer outputs a .config with freshly updated defconfigs Rafael J. Wysocki
2008-09-12 19:06 ` [Bug #11224] Only three cores found on quad-core machine Rafael J. Wysocki
2008-09-12 19:06 ` [Bug #11264] Invalid op opcode in kernel/workqueue Rafael J. Wysocki
2008-09-12 19:06 ` [Bug #11271] BUG: fealnx in 2.6.27-rc1 Rafael J. Wysocki
2008-09-13 8:47 ` Jaswinder Singh
2008-09-12 19:06 ` [Bug #11272] BUG: parport_serial in 2.6.27-rc1 for NetMos Technology PCI 9835 Rafael J. Wysocki
2008-09-16 15:25 ` Jaswinder Singh
2008-09-12 19:06 ` [Bug #11276] build error: CONFIG_OPTIMIZE_INLINING=y causes gcc 4.2 to do stupid things Rafael J. Wysocki
2008-09-12 20:46 ` Randy Dunlap
2008-09-12 21:19 ` Rafael J. Wysocki
2008-09-17 14:26 ` Bjorn Helgaas
2008-09-12 19:06 ` [Bug #11340] LTP overnight run resulted in unusable box Rafael J. Wysocki
2008-09-12 19:06 ` [Bug #11336] 2.6.27-rc2:stall while mounting root fs Rafael J. Wysocki
2008-09-12 19:06 ` [Bug #11335] 2.6.27-rc2-git5 BUG: unable to handle kernel paging request Rafael J. Wysocki
2008-09-12 19:06 ` [Bug #11308] tbench regression on each kernel release from 2.6.22 -> 2.6.28 Rafael J. Wysocki
2008-09-12 22:05 ` Christoph Lameter
2008-09-13 11:44 ` Mike Galbraith
2008-09-13 11:57 ` Mike Galbraith
2008-09-14 6:24 ` Mike Galbraith
2008-09-14 7:02 ` Mike Galbraith
2008-09-14 14:18 ` Christoph Lameter
2008-09-14 19:51 ` Mike Galbraith
2008-09-15 10:44 ` Mike Galbraith [this message]
2008-09-16 12:28 ` Mike Galbraith
2008-09-16 14:07 ` Ilpo Järvinen
2008-09-17 4:39 ` Mike Galbraith
2008-09-17 5:01 ` Mike Galbraith
2008-09-17 10:40 ` Ingo Molnar
2008-09-17 11:41 ` Mike Galbraith
2008-09-17 12:49 ` Ingo Molnar
2008-09-17 13:11 ` Mike Galbraith
2008-09-17 13:36 ` Ilpo Järvinen
2008-09-17 13:57 ` Mike Galbraith
2008-09-17 17:04 ` Ilpo Järvinen
2008-09-18 7:12 ` Mike Galbraith
2008-09-18 7:25 ` Mike Galbraith
2008-09-18 7:58 ` Ilpo Järvinen
2008-09-17 14:47 ` Eric Dumazet
2008-09-17 14:50 ` Eric Dumazet
2008-09-17 18:16 ` Mike Galbraith
2008-09-12 19:06 ` [Bug #11357] Can not boot up with zd1211rw USB-Wlan Stick Rafael J. Wysocki
2008-09-12 19:06 ` [Bug #11358] net: forcedeth call restore mac addr in nv_shutdown path Rafael J. Wysocki
2008-09-12 19:06 ` [Bug #11380] lockdep warning: cpu_add_remove_lock at:cpu_maps_update_begin+0x14/0x16 Rafael J. Wysocki
2008-09-12 19:06 ` [Bug #11343] SATA Cold Boot Problems with 2.6.27-rc[23] on nVidia 680i Rafael J. Wysocki
2008-09-12 19:06 ` [Bug #11398] hda_intel: IRQ timing workaround is activated for card #0. Suggest a bigger bdl_pos_adj Rafael J. Wysocki
2008-09-13 7:37 ` Frans Pop
2008-09-13 17:23 ` Takashi Iwai
2008-09-15 0:13 ` Rafael J. Wysocki
2008-09-12 19:06 ` [Bug #11404] BUG: in 2.6.23-rc3-git7 in do_cciss_intr Rafael J. Wysocki
2008-09-12 19:06 ` [Bug #11382] e1000e: 2.6.27-rc1 corrupts EEPROM/NVM Rafael J. Wysocki
2008-09-12 19:06 ` [Bug #11407] suspend: unable to handle kernel paging request Rafael J. Wysocki
2008-09-12 20:50 ` Vegard Nossum
2008-09-12 19:06 ` [Bug #11465] Linux-2.6.27-rc5, drm errors in log Rafael J. Wysocki
2008-09-12 19:06 ` [Bug #11463] sshd hangs on close Rafael J. Wysocki
2008-09-12 19:06 ` [Bug #11459] kernel crash after wifi connection established Rafael J. Wysocki
2008-09-12 19:06 ` [Bug #11442] btusb hibernation/suspend breakage in current -git Rafael J. Wysocki
2008-09-12 19:06 ` [Bug #11439] [2.6.27-rc4-git4] compilation warnings Rafael J. Wysocki
2008-09-12 19:06 ` [Bug #11471] GPE storm detected, kernel freezes Rafael J. Wysocki
2008-09-16 5:50 ` Zhang Rui
2008-09-12 19:06 ` [Bug #11485] 2.6.27-rc xen pvops regression? Rafael J. Wysocki
2008-09-12 19:06 ` [Bug #11500] /proc/net bug related to selinux Rafael J. Wysocki
2008-09-12 22:14 ` James Morris
2008-09-12 22:24 ` Andrew Morton
2008-09-13 0:15 ` James Morris
2008-09-13 19:37 ` Andrew Morton
2008-09-15 0:16 ` Rafael J. Wysocki
2008-09-15 13:05 ` Stephen Smalley
2008-09-15 13:42 ` Stephen Smalley
2008-09-17 19:50 ` Andrew Morton
2008-09-17 21:24 ` Paul Moore
2008-09-17 21:39 ` Eric W. Biederman
2008-09-17 22:11 ` Andrew Morton
2008-09-17 21:48 ` Andrew Morton
2008-09-17 22:12 ` Paul Moore
2008-09-17 22:24 ` Andrew Morton
2008-09-17 22:53 ` Eric W. Biederman
2008-09-17 22:32 ` Eric W. Biederman
2008-09-18 12:38 ` Stephen Smalley
2008-09-18 13:03 ` Stephen Smalley
2008-09-18 18:09 ` Eric W. Biederman
2008-09-18 18:34 ` Stephen Smalley
2008-09-19 16:58 ` david
2008-09-19 17:07 ` Stephen Smalley
2008-09-29 16:49 ` Stephen Smalley
2008-09-17 22:23 ` David Miller
2008-09-17 21:56 ` Eric W. Biederman
2008-09-12 19:06 ` [Bug #11501] Failed to open destination file: Permission deniedihex2fw Rafael J. Wysocki
2008-09-12 19:06 ` [Bug #11476] failure to associate after resume from suspend to ram Rafael J. Wysocki
2008-09-12 19:06 ` [Bug #11505] oltp ~10% regression with 2.6.27-rc5 on stoakley machine Rafael J. Wysocki
2008-09-12 19:06 ` [Bug #11506] oops during unmount - ext3? (2.6.27-rc5) Rafael J. Wysocki
2008-09-19 16:17 ` Marcin Slusarz
2008-09-12 19:06 ` [Bug #11507] usb: sometimes dead keyboard after boot Rafael J. Wysocki
2008-09-12 19:06 ` [Bug #11512] sort-of regression due to "kconfig: speed up all*config + randconfig" Rafael J. Wysocki
2008-09-12 19:06 ` [Bug #11549] 2.6.27-rc5 acpi: EC Storm error message on bootup Rafael J. Wysocki
2008-09-12 19:06 ` [Bug #11516] severe performance degradation on x86_64 going from 2.6.26-rc9 -> 2.6.27-rc5 Rafael J. Wysocki
2008-09-12 19:06 ` [Bug #11548] kernel BUG at drivers/pci/intel-iommu.c:1373! Rafael J. Wysocki
2008-09-12 20:56 ` Chris Mason
2008-09-12 21:21 ` Rafael J. Wysocki
2008-09-12 19:06 ` [Bug #11547] build issue #565 for v2.6.27-rc5 : undefined reference to `ei_interrupt' in hp-plus.c Rafael J. Wysocki
2008-09-12 19:06 ` [Bug #11550] pnp: Huge number of "io resource overlap" messages Rafael J. Wysocki
2008-09-12 22:52 ` Rene Herman
2008-09-12 19:06 ` [Bug #11552] Disabling IRQ #23 Rafael J. Wysocki
2008-09-13 3:24 ` Justin Mattock
2008-09-12 19:06 ` [Bug #11554] Partition check considered as error is breaking mounting in 2.6.27 Rafael J. Wysocki
2008-09-13 23:37 ` Herton Ronaldo Krzesinski
2008-09-15 0:25 ` Rafael J. Wysocki
2008-09-12 19:06 ` [Bug #11553] Strange looking line from "ps aux" Rafael J. Wysocki
2008-09-13 8:51 ` Alan Jenkins
2008-09-12 19:06 ` [Bug #11551] Semi-repeatable hard lockup on 2.6.27-rc6 Rafael J. Wysocki
2008-09-12 19:06 ` [Bug #11559] 2.6.27-rc6: nohz + s2ram = need to press keys to get progress Rafael J. Wysocki
2008-09-12 19:06 ` [Bug #11557] Controlling backlight on thinkpad x60 Rafael J. Wysocki
2008-09-13 15:13 ` Matthew Garrett
2008-09-14 10:18 ` Pavel Machek
2008-09-12 19:06 ` [Bug #11556] e100: PCI wake-up handling rework causes "Error clearing wake event" Rafael J. Wysocki
-- strict thread matches above, loose matches on Subject: below --
2008-11-16 17:38 2.6.28-rc5: Reported regressions 2.6.26 -> 2.6.27 Rafael J. Wysocki
2008-11-16 17:40 ` [Bug #11308] tbench regression on each kernel release from 2.6.22 -> 2.6.28 Rafael J. Wysocki
2008-11-17 9:06 ` Ingo Molnar
2008-11-17 9:14 ` David Miller
2008-11-17 11:01 ` Ingo Molnar
2008-11-17 11:20 ` Eric Dumazet
2008-11-17 16:11 ` Ingo Molnar
2008-11-17 16:35 ` Eric Dumazet
2008-11-17 17:08 ` Ingo Molnar
2008-11-17 17:25 ` Ingo Molnar
2008-11-17 17:33 ` Eric Dumazet
2008-11-17 17:38 ` Linus Torvalds
2008-11-17 17:42 ` Eric Dumazet
2008-11-17 18:23 ` Ingo Molnar
2008-11-17 18:33 ` Linus Torvalds
2008-11-17 18:49 ` Ingo Molnar
2008-11-17 19:30 ` Eric Dumazet
2008-11-17 19:39 ` David Miller
2008-11-17 19:43 ` Eric Dumazet
2008-11-17 19:55 ` Linus Torvalds
2008-11-17 20:16 ` David Miller
2008-11-17 20:30 ` Linus Torvalds
2008-11-17 20:58 ` David Miller
2008-11-18 9:44 ` Nick Piggin
2008-11-18 15:58 ` Linus Torvalds
2008-11-19 4:31 ` Nick Piggin
2008-11-20 9:14 ` David Miller
2008-11-20 9:06 ` David Miller
2008-11-18 12:29 ` Mike Galbraith
2008-11-17 19:57 ` Ingo Molnar
2008-11-17 20:47 ` Ingo Molnar
2008-11-17 20:56 ` Eric Dumazet
2008-11-17 22:08 ` Ingo Molnar
2008-11-17 22:15 ` Eric Dumazet
2008-11-17 22:26 ` Ingo Molnar
2008-11-17 22:39 ` Eric Dumazet
2008-11-18 5:23 ` David Miller
2008-11-18 8:45 ` Ingo Molnar
2008-11-17 22:19 ` Ingo Molnar
2008-11-17 19:36 ` David Miller
2008-11-17 19:31 ` David Miller
2008-11-17 19:47 ` Linus Torvalds
2008-11-17 19:51 ` David Miller
2008-11-17 19:53 ` Ingo Molnar
2008-11-17 22:47 ` Ingo Molnar
2008-11-17 19:21 ` David Miller
2008-11-17 19:48 ` Linus Torvalds
2008-11-17 19:52 ` David Miller
2008-11-17 19:57 ` Linus Torvalds
2008-11-17 20:18 ` David Miller
2008-11-19 19:43 ` Christoph Lameter
2008-11-19 20:14 ` Ingo Molnar
2008-11-20 23:52 ` Christoph Lameter
2008-11-21 8:30 ` Ingo Molnar
2008-11-21 8:51 ` Eric Dumazet
2008-11-21 9:05 ` David Miller
2008-11-21 12:51 ` Eric Dumazet
2008-11-21 9:18 ` Ingo Molnar
2008-11-21 9:03 ` David Miller
2008-11-21 16:11 ` Christoph Lameter
2008-11-21 18:06 ` Christoph Lameter
2008-11-21 18:16 ` Eric Dumazet
2008-11-21 18:19 ` Eric Dumazet
2008-11-09 19:40 2.6.28-rc3-git6: Reported regressions 2.6.26 -> 2.6.27 Rafael J. Wysocki
2008-11-09 19:43 ` [Bug #11308] tbench regression on each kernel release from 2.6.22 -> 2.6.28 Rafael J. Wysocki
2008-11-02 16:47 2.6.28-rc2-git7: Reported regressions 2.6.26 -> 2.6.27 Rafael J. Wysocki
2008-11-02 16:49 ` [Bug #11308] tbench regression on each kernel release from 2.6.22 -> 2.6.28 Rafael J. Wysocki
2008-10-25 21:04 2.6.28-rc1-git1: Reported regressions 2.6.26 -> 2.6.27 Rafael J. Wysocki
2008-10-25 21:07 ` [Bug #11308] tbench regression on each kernel release from 2.6.22 -> 2.6.28 Rafael J. Wysocki
2008-10-04 17:28 2.6.27-rc8-git7: Reported regressions from 2.6.26 Rafael J. Wysocki
2008-10-04 17:32 ` [Bug #11308] tbench regression on each kernel release from 2.6.22 -> 2.6.28 Rafael J. Wysocki
2008-09-21 18:52 2.6.27-rc6-git6: Reported regressions from 2.6.26 Rafael J. Wysocki
2008-09-21 18:54 ` [Bug #11308] tbench regression on each kernel release from 2.6.22 -> 2.6.28 Rafael J. Wysocki
2008-09-06 21:24 2.6.27-rc5-git8: Reported regressions from 2.6.26 Rafael J. Wysocki
2008-09-06 21:30 ` [Bug #11308] tbench regression on each kernel release from 2.6.22 -> 2.6.28 Rafael J. Wysocki
2008-08-30 19:46 2.6.27-rc5-git2: Reported regressions from 2.6.26 Rafael J. Wysocki
2008-08-30 19:50 ` [Bug #11308] tbench regression on each kernel release from 2.6.22 -> 2.6.28 Rafael J. Wysocki
2008-08-23 18:07 2.6.27-rc4-git1: Reported regressions from 2.6.26 Rafael J. Wysocki
2008-08-23 18:10 ` [Bug #11308] tbench regression on each kernel release from 2.6.22 -> 2.6.28 Rafael J. Wysocki
2008-08-16 19:00 2.6.27-rc3-git3: Reported regressions from 2.6.26 Rafael J. Wysocki
2008-08-16 19:02 ` [Bug #11308] tbench regression on each kernel release from 2.6.22 -> 2.6.28 Rafael J. Wysocki
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