https://bugzilla.novell.com/show_bug.cgi?id=829019 https://bugzilla.novell.com/show_bug.cgi?id=829019#c1 --- Comment #1 from Antoine Ginies 2013-07-11 09:26:55 UTC --- with 3.10.0-2.gc5ad3f9-desktop and intel_pstate: linux-hewl:/sys/devices/system/cpu/cpu0/cpufreq # cat cpuinfo_min_freq 800000 linux-hewl:/sys/devices/system/cpu/cpu0/cpufreq # cat cpuinfo_max_freq 3500000 linux-hewl:/sys/devices/system/cpu/intel_pstate # cat no_turbo 0 linux-hewl:/sys/devices/system/cpu/intel_pstate # cat max_perf_pct 100 linux-hewl:/sys/devices/system/cpu/intel_pstate # cat min_perf_pct 22 -- 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=829019 https://bugzilla.novell.com/show_bug.cgi?id=829019#c Jeff Mahoney changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |jeffm@suse.com AssignedTo|kernel-maintainers@forge.pr |trenn@suse.com |ovo.novell.com | -- 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=829019 https://bugzilla.novell.com/show_bug.cgi?id=829019#c4 Jari Kuittinen changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |jk0bugs@gmail.com --- Comment #4 from Jari Kuittinen 2013-07-20 22:20:39 UTC --- It is a known kernel bug indeed. Appending intel_pstate=disable to kernel boot arguments on 13.1 milestone 3 x86_64 fixes acpi_cpufreq (and removes the chance to use TurboBoost), resulting in the same behavior as in previous releases. -- 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=829019 https://bugzilla.novell.com/show_bug.cgi?id=829019#c6 Antoine Ginies changed: What |Removed |Added ---------------------------------------------------------------------------- Status|ASSIGNED |RESOLVED Resolution| |UPSTREAM --- Comment #6 from Antoine Ginies 2013-08-29 10:14:25 UTC --- My CPU is no more in boost mode. -- 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=829019 https://bugzilla.novell.com/show_bug.cgi?id=829019#c8 --- Comment #8 from Antoine Ginies 2013-08-29 12:30:28 UTC --- By default with the bugged kernel, and the governor in powersave mode, my cpu was in boost mode. This doesnt appear anymore. Version of the kernel: Linux linux-hewl.site 3.11.0-rc6-1.g7ee85be-desktop #1 SMP PREEMPT Wed Aug 21 09:21:00 UTC 2013 (7ee85be) x86_64 x86_64 x86_64 GNU/Linux I am in powersave governor, so my CPU was stuck at ~700Mz linux-hewl:~ # cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor powersave my cmdline: linux-hewl:/sys/devices/system/cpu/cpu0/cpufreq # cat /proc/cmdline BOOT_IMAGE=/boot/vmlinuz-3.11.0-rc6-1.g7ee85be-desktop root=UUID=d54299b5-7e7e-4a41-b1ff-3d2bd763c8c2 resume=/dev/disk/by-id/ata-HITACHI_HTS727550A9E364_J3320082GSY7JA-part1 splash=silent quiet showopts i915.i915_enable_rc6=1 i915.i915_enable_fbc=1 i915.lvds_downclock=1 pcie_aspm if i switch the gorvernor to perfomance, and set no_turbo to 1, then i do the cat /dev/zero > /dev/null, my CPU switch to boost mode: |Nehalem || SandyBridge || Mperf || Idle_Stats CPU | C3 | C6 | PC3 | PC6 || C7 | PC2 | PC7 || C0 | Cx | Freq || POLL | C1-S | C1E- | C3-S | C6-S | C7-S 0| 0.27| 0.00| 0.00| 0.00|| 97.93| 0.00| 0.00|| 0.63| 99.37| 3324|| 0.00| 0.20| 0.18| 0.29| 0.00| 98.66 1| 0.27| 0.00| 0.00| 0.00|| 97.93| 0.00| 0.00|| 0.11| 99.89| 3251|| 0.00| 0.00| 0.00| 0.00| 0.00| 99.88 2| 0.00| 0.00| 0.00| 0.00|| 98.57| 0.00| 0.00|| 0.98| 99.02| 3339|| 0.00| 0.00| 0.05| 0.00| 0.00| 98.92 3| 0.00| 0.00| 0.00| 0.00|| 98.57| 0.00| 0.00|| 0.12| 99.88| 3300|| 0.00| 0.00| 0.00| 0.00| 0.00| 99.86 4| 0.00| 0.00| 0.00| 0.00|| 99.39| 0.00| 0.00|| 0.37| 99.63| 3305|| 0.00| 0.00| 0.01| 0.00| 0.00| 99.59 5| 0.00| 0.00| 0.00| 0.00|| 99.39| 0.00| 0.00|| 0.06| 99.94| 3304|| 0.00| 0.00| 0.00| 0.00| 0.00| 99.94 6| 0.00| 0.00| 0.00| 0.00|| 0.00| 0.00| 0.00|| 0.00|100.00| 3202|| 0.00| 0.00| 0.00| 0.00| 0.00|100.00 7| 0.00| 0.00| 0.00| 0.00|| 0.00| 0.00| 0.00|| 99.52| 0.48| 3471|| 0.00| 0.00| 0.00| 0.00| 0.00| 0.00 I have done some test with the no_turbo parameter, setting it to 1 and 0, and CPU freq was 2.4Mz or ~ 3.4Mz, so it works. So the bug is resolved. PS: i have previously checked the CPU freq with /proc/cpuinfo -- 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=829019 https://bugzilla.novell.com/show_bug.cgi?id=829019#c10 --- Comment #10 from Thomas Renninger 2013-08-29 12:51:36 UTC --- Thanks for clarification. So the state of the bug is correct and mainline kernel works as expected.

i have previously checked the CPU freq with /proc/cpuinfo Yes, this does not work. Boost mode can not be read out immediately from HW, It has to be calculated between 2 reads over a specific time (by default 1 sec with cpupower monitor).

-> keeping resovled upstream state of the bug, everything is fine, at least in latest mainline kernel. -- 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.