[Bug 883616] New: ondemand cpu frequency scaling with "ignore_nice_load" doesn't work anymore
https://bugzilla.novell.com/show_bug.cgi?id=883616 https://bugzilla.novell.com/show_bug.cgi?id=883616#c0 Summary: ondemand cpu frequency scaling with "ignore_nice_load" doesn't work anymore Classification: openSUSE Product: openSUSE 13.1 Version: Final Platform: x86-64 OS/Version: openSUSE 13.1 Status: NEW Severity: Normal Priority: P5 - None Component: Kernel AssignedTo: kernel-maintainers@forge.provo.novell.com ReportedBy: madworm_de.novell@spitzenpfeil.org QAContact: qa-bugs@suse.de Found By: --- Blocker: --- Created an attachment (id=595371) --> (http://bugzilla.novell.com/attachment.cgi?id=595371) hwinfo --all User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:29.0) Gecko/20100101 Firefox/29.0 This used to work some time ago, now it doesn't. If "/sys/devices/system/cpu/cpufreq/ondemand/ignore_nice_load" is set to 1, the cpu frequency hits bottom rock and stays there, irrespective of processes that run with normal priority and should cause the cpu frequency to go up. CPU: AMD Athlon(tm) 64 X2 Dual Core Processor 5000+ kernel: Linux linuxbox 3.11.10-11-desktop #1 SMP PREEMPT Mon May 12 13:37:06 UTC 2014 (3d22b5f) x86_64 x86_64 x86_64 GNU/Linux --- The scaling still works on my laptop (same kernel, intel cpu), so that might be a hint. Reproducible: Always Steps to Reproduce: 1. 2. 3. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.
https://bugzilla.novell.com/show_bug.cgi?id=883616 https://bugzilla.novell.com/show_bug.cgi?id=883616#c1 Takashi Iwai <tiwai@suse.com> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |NEEDINFO CC| |tiwai@suse.com InfoProvider| |trenn@suse.com --- Comment #1 from Takashi Iwai <tiwai@suse.com> 2014-07-31 14:31:15 UTC --- Thomas, is this expected behavior? -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.
https://bugzilla.novell.com/show_bug.cgi?id=883616 https://bugzilla.novell.com/show_bug.cgi?id=883616#c2 Thomas Renninger <trenn@suse.com> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEEDINFO |ASSIGNED CC| |bpetkov@suse.com, | |trenn@suse.com InfoProvider|trenn@suse.com | AssignedTo|kernel-maintainers@forge.pr |trenn@suse.com |ovo.novell.com | --- Comment #2 from Thomas Renninger <trenn@suse.com> 2014-08-01 09:35:05 UTC --- Oh dear. Latest Intel HW does not use the ondemand governor anymore and there this feature is gone anyway. But on this one it should still work. But it has really low prio... -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.
https://bugzilla.novell.com/show_bug.cgi?id=883616 https://bugzilla.novell.com/show_bug.cgi?id=883616#c3 Chris Norris <chris@dukla.net> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |chris@dukla.net --- Comment #3 from Chris Norris <chris@dukla.net> 2014-08-17 19:01:37 UTC --- Yup, noticed the same problem. And also with conservative governor. A simple echo 1 > /sys/devices/system/cpu/cpufreq/ondemand/ignore_nice_load means you drop to min frequency forever (or until you change back). AMD Athlon(tm) Dual Core Processor 4850e (fam: 0f, model: 6b, stepping: 02) chris@Nserver:~> uname -a Linux Nserver 3.11.10-21-desktop #1 SMP PREEMPT Mon Jul 21 15:28:46 UTC 2014 (9a9565d) x86_64 x86_64 x86_64 GNU/Linux chris@Nserver:~> lsb_release -a LSB Version: n/a Distributor ID: openSUSE project Description: openSUSE 13.1 (Bottle) (x86_64) Release: 13.1 Codename: Bottle -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.
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