Also running a self-compiled 2.6.35-rc3, it is amazing on my Atom netbook, but Load Balancing ticks are still skyrocketing on my Athlon II dual core. Do I need to enable any config option I have missed? (Used the mainline kernel PPA on the Atom, compiled myself for the Athlon II to include a custom fix.) Maybe I need to retry with the Maverick config.
2010/9/7 Sidnei da Silva <524...@bugs.launchpad.net>: > @Andy: > > I'm running a fully-up-to-date Maverick, and still getting tons of > wakeups from load balancing ticks. It's consistently the top one, at: > > 28.1% (200.1) [kernel scheduler] Load balancing tick > > That's with: > > Linux sidnei-laptop 2.6.35-20-generic #29-Ubuntu SMP Fri Sep 3 > 14:55:28 UTC 2010 x86_64 GNU/Linux > > -- > Tens of wakes per second in "[kernel scheduler] Load balancing tick" on Core > 2 Duo even with only 1 core enabled > https://bugs.launchpad.net/bugs/524281 > You received this bug notification because you are a direct subscriber > of the bug. > > Status in “linux” package in Ubuntu: Triaged > Status in Arch Linux: New > Status in “linux-2.6” package in Debian: Incomplete > > Bug description: > powertop reports many wakes per second (quantity depending on system) in > "[kernel scheduler] Load balancing tick" task, rising with little load, on > many kinds of multi-core (?) systems (original report was on a Core 2 Duo > processor (T6500) with a single core enabled (multicore disabled in BIOS)). > > Cause of the problem: > With kernel 2.6.32, there came a patch to the scheduler that introduced this > problem (that was backported to some other versions as well). Even though > this problem occurred first in Lucid, it is NOT specific to Lucid or Ubuntu > at all (Debian bug report at > http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=521944, reproducable in Arch > Linux as well). Work is ongoing to get things straight in kernel, but it will > take a long time until this reaches Ubuntu (see > http://lkml.org/lkml/2010/7/6/172). > > Workarounds that DO NOT work (may improve situation but not solve it): > - maxcpus=1 > - noapic > - nosmp > - nolapic > - use mainline kernel > > Workarounds that DO (probably) work: > - tip version of kernel > (git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip.git, from > http://lkml.org/lkml/2010/7/8/75) > - use maverick's kernel with applied patches > (https://launchpad.net/~brian-rogers/+archive/power, from comment #80) > > ProblemType: Bug > AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.21. > Architecture: i386 > ArecordDevices: > **** List of CAPTURE Hardware Devices **** > card 0: Intel [HDA Intel], device 0: ALC269 Analog [ALC269 Analog] > Subdevices: 1/1 > Subdevice #0: subdevice #0 > AudioDevicesInUse: > USER PID ACCESS COMMAND > /dev/snd/controlC0: etrusco 1606 F.... pulseaudio > etrusco 15151 F.... foobar2000.exe > CRDA: Error: [Errno 2] No such file or directory > Card0.Amixer.info: > Card hw:0 'Intel'/'HDA Intel at 0xfddf8000 irq 22' > Mixer name : 'Realtek ALC269' > Components : 'HDA:10ec0269,1b0a4009,00100004 > HDA:11c11040,1b0a4007,00100200' > Controls : 19 > Simple ctrls : 11 > Card1.Amixer.info: > Card hw:1 'HDMI'/'HDA ATI HDMI at 0xfebec000 irq 17' > Mixer name : 'ATI R6xx HDMI' > Components : 'HDA:1002aa01,00aa0100,00100100' > Controls : 4 > Simple ctrls : 1 > Card1.Amixer.values: > Simple mixer control 'IEC958',0 > Capabilities: pswitch pswitch-joined penum > Playback channels: Mono > Mono: Playback [on] > Date: Fri Feb 19 05:25:42 2010 > DistroRelease: Ubuntu 10.04 > EcryptfsInUse: Yes > MachineType: Philco PHN10XXX. > Package: linux-image-2.6.32-13-generic 2.6.32-13.18 > ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.32-13-generic > root=UUID=d482e94f-9370-4ad2-9536-986541003db5 ro acpi.power_nocheck=1 > acpi_osi=linux radeon.blacklist=yes > ProcEnviron: > LANG=en_US.UTF-8 > SHELL=/bin/bash > ProcVersionSignature: Ubuntu 2.6.32-13.18-generic > Regression: No > RelatedPackageVersions: linux-firmware 1.29 > Reproducible: Yes > RfKill: > 0: phy0: Wireless LAN > Soft blocked: no > Hard blocked: no > SourcePackage: linux > TestedUpstream: No > Uname: Linux 2.6.32-13-generic i686 > dmi.bios.date: 06/01/2009 > dmi.bios.vendor: American Megatrends Inc. > dmi.bios.version: 1.01 > dmi.board.asset.tag: To Be Filled By O.E.M. > dmi.board.vendor: PEGATRON CORP. > dmi.board.version: To be filled by O.E.M. > dmi.chassis.asset.tag: To Be Filled By O.E.M. > dmi.chassis.type: 10 > dmi.chassis.vendor: PEGATRON CORP. > dmi.chassis.version: To Be Filled By O.E.M. > dmi.modalias: > dmi:bvnAmericanMegatrendsInc.:bvr1.01:bd06/01/2009:svnPhilco:pnPHN10XXX.:pvr1.01:rvnPEGATRONCORP.:rn:rvrTobefilledbyO.E.M.:cvnPEGATRONCORP.:ct10:cvrToBeFilledByO.E.M.: > dmi.product.name: PHN10XXX. > dmi.product.version: 1.01 > dmi.sys.vendor: Philco > > > > To unsubscribe from this bug, go to: > https://bugs.launchpad.net/ubuntu/+source/linux/+bug/524281/+subscribe > -- Tens of wakes per second in "[kernel scheduler] Load balancing tick" on Core 2 Duo even with only 1 core enabled https://bugs.launchpad.net/bugs/524281 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
