Out of interest, why are all your cores running over 3.5GHz when you've only loaded CPU 7? When acpi-cpufreq/ondemand was working properly on my system, it would have had seven cores running near the minimum (0.8 GHz) and the loaded one running at turbo.
Has anything been patched in the ondemand governor for Ubuntu's 3.11 kernel? Since I can manually change the CPU frequencies, it might be that acpi-cpufreq has no issues, but the ondemand governor isn't detecting the increase in load on my system. And it looks like the problem doesn't carry across to the 'vanilla' 3.12. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1233479 Title: ondemand cpufreq governor does not scale CPU freq on Sandybridge Status in “linux” package in Ubuntu: Confirmed Bug description: I notice that turbostat shows all cpus stuck at the minimum 800MHz (see attached log) on my system, even after rebooting twice. I used "stress --cpu 8" to confirm that the frequencies remained at 800MHz even under load. It looks like the system is using the acpi-cpufreq driver with the ondemand governor (has the default been changed so it does not use intel p-state, as per https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1188647?). Edit: See comment #1 below - it looks like I can manually change the cpu freq, but the governor cannot. Also, switching to use intel pstate fixes the problem. The only unusual thing I had done prior to this was to boot into the weekly build of 3.12-rc3 just prior (this kernel kept the frequencies rather high, typically over 2GHz, ie using a lot more power than usual, so I rebooted back into the standard kernel). This is the contents of the files in /sys/devices/system/cpu/cpu0/cpufreq/: affected_cpus: 0 bios_limit: 2001000 cpuinfo_cur_freq: 800000 cpuinfo_max_freq: 2001000 cpuinfo_min_freq: 800000 cpuinfo_transition_latency: 10000 freqdomain_cpus: 0 1 2 3 4 5 6 7 related_cpus: 0 scaling_available_frequencies: 2001000 2000000 1900000 1800000 1700000 1600000 1500000 1400000 1300000 1200000 1100000 1000000 900000 800000 scaling_available_governors: conservative ondemand userspace powersave performance scaling_cur_freq: 800000 scaling_driver: acpi-cpufreq scaling_governor: ondemand scaling_max_freq: 2001000 scaling_min_freq: 800000 scaling_setspeed: <unsupported> stats: ProblemType: Bug DistroRelease: Ubuntu 13.10 Package: linux-image-3.11.0-9-generic 3.11.0-9.16 ProcVersionSignature: Ubuntu 3.11.0-9.16-generic 3.11.2 Uname: Linux 3.11.0-9-generic x86_64 ApportVersion: 2.12.5-0ubuntu1 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: rocko 2813 F.... pulseaudio Date: Tue Oct 1 10:13:24 2013 InstallationDate: Installed on 2012-08-25 (401 days ago) InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Alpha amd64 (20120724.2) MachineType: Dell Inc. Dell System XPS L502X MarkForUpload: True ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.11.0-9-generic root=UUID=67083065-b92e-4596-a218-817c1dfc8ae7 ro crashkernel=384M-2G:64M,2G-:128M quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-3.11.0-9-generic N/A linux-backports-modules-3.11.0-9-generic N/A linux-firmware 1.115 SourcePackage: linux UpgradeStatus: Upgraded to saucy on 2013-09-01 (30 days ago) dmi.bios.date: 05/29/2012 dmi.bios.vendor: Dell Inc. dmi.bios.version: A11 dmi.board.name: 0NJT03 dmi.board.vendor: Dell Inc. dmi.board.version: A00 dmi.chassis.type: 8 dmi.chassis.vendor: Dell Inc. dmi.chassis.version: 0.1 dmi.modalias: dmi:bvnDellInc.:bvrA11:bd05/29/2012:svnDellInc.:pnDellSystemXPSL502X:pvr:rvnDellInc.:rn0NJT03:rvrA00:cvnDellInc.:ct8:cvr0.1: dmi.product.name: Dell System XPS L502X dmi.sys.vendor: Dell Inc. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1233479/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
