lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
Open Source and information security mailing list archives
| ||
|
Date: Wed, 8 Aug 2018 00:05:51 +0200 From: Gabriele Mazzotta <gabriele.mzt@...il.com> To: Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>, "Rafael J. Wysocki" <rafael@...nel.org> Cc: "Rafael J. Wysocki" <rjw@...ysocki.net>, Len Brown <lenb@...nel.org>, Viresh Kumar <viresh.kumar@...aro.org>, Linux PM <linux-pm@...r.kernel.org>, Linux Kernel Mailing List <linux-kernel@...r.kernel.org> Subject: Re: [PATCH] Revert "cpufreq: intel_pstate: Fix ->set_policy() interface for no_turbo" On 07/08/2018 23:22, Srinivas Pandruvada wrote: > On Tue, 2018-08-07 at 22:12 +0200, Gabriele Mazzotta wrote: >> On 07/08/2018 00:11, Srinivas Pandruvada wrote: >>> On Mon, 2018-08-06 at 23:50 +0200, Gabriele Mazzotta wrote: >>>> On 06/08/2018 18:49, Srinivas Pandruvada wrote: >>>>> On Mon, 2018-08-06 at 10:30 +0200, Rafael J. Wysocki wrote: >>>>>> On Sat, Aug 4, 2018 at 7:31 PM, Gabriele Mazzotta >>>>>> <gabriele.mzt@...il.com> wrote: >>>>>>> On 04/08/2018 17:29, Gabriele Mazzotta wrote: >>>>>>>> This change does not take into account that some BIOSes >>>>>>>> change >>>>>>>> MSR_IA32is getting notified via PPC >>>>>>>> change._MISC_ENABLE_TURBO_DISABLE depending on the power >>>>>>>> source. >>>>>>>> If the turbo is disabled when the system boots, >>>>>>>> policy.max_freq >>>>>>>> is set to pstate.max_pstate. However, if the BIOS later >>>>>>>> enables >>>>>>>> the turbo, the CPU will never be able to run at >>>>>>>> pstate.turbo_pstate. >>>>>>>> is getting notified via PPC change. >>>>>>>> Since now intel_pstate_set_policy() does its calculations >>>>>>>> using >>>>>>>> pstate.max_freq and pstate.turbo_freq, we can always >>>>>>>> calculate >>>>>>>> cpuinfo.max_freq using pstate.turbo_pstate, thus allowing >>>>>>>> system >>>>>>>> with varying MSR_IA32_MISC_ENABLE_TURBO_DISABLE to run at >>>>>>>> full >>>>>>>> speed when the turbo is enabled. >>>>>> >>>>>> Well, the problem with this approach is that always using >>>>>> pstate.turbo_pstate as the max causes the governor to >>>>>> overestimate >>>>>> the >>>>>> target frequency when the turbo range is not available (the >>>>>> target >>>>>> depends on the width of the entire available P-state range >>>>>> including >>>>>> turbo, so if the turbo range is not available, the number >>>>>> take >>>>>> into >>>>>> that computation is too large). >>>>>> >>>>>> Are we expected to get notified when the BIOS updates >>>>>> MSR_IA32_MISC_ENABLE_TURBO_DISABLE? >>>>> >>>>> Let's try this: >>>>> - boot with kernel command line >>>>> >>>>> intel_pstate=support_acpi_ppc dyndbg="file processor_perflib.c >>>>> +p" >>>>> dyndbg="file intel_pstate.c +p" >>> > Can you create a bugzilla? In this way easy to exchange attachments. > For example in the above command line I was expecting boot up traces > from intel_pstate (I need full dmesg). From the log with PPC=6 should > correspond to 1.6GHz from acpi dump. > Even after power is connected the PPC is still requesting to be 6. > > I will attach some test patch to bugzilla after checking the full > dmesg. Done: https://bugzilla.kernel.org/show_bug.cgi?id=200759 Gabriele > > turbostat log shoes that turbo was disabled on unplug but it is getting > notified via some PPC change. > > Thanks, > Srinivas > >>> Interesting output. >>> Can you run ? >>> # turbostat --debug >>> in both plugged and unplugged state. >> >> This is the output of turbostat while plugged in, with >> intel_pstate=support_acpi_ppc in the cmdline: >> >> turbostat version 18.06.20 - Len Brown <lenb@...nel.org> >> CPUID(0): GenuineIntel 13 CPUID levels; family:model:stepping >> 0x6:45:1 (6:69:1) >> CPUID(1): SSE3 MONITOR - EIST TM2 TSC MSR ACPI-TM HT TM >> CPUID(6): APERF, TURBO, DTS, PTM, No-HWP, No-HWPnotify, No-HWPwindow, >> No-HWPepp, No-HWPpkg, EPB >> cpu0: MSR_IA32_MISC_ENABLE: 0x00850089 (TCC EIST MWAIT PREFETCH >> TURBO) >> CPUID(7): No-SGX >> cpu0: MSR_MISC_PWR_MGMT: 0x00400000 (ENable-EIST_Coordination >> DISable-EPB DISable-OOB) >> RAPL: 17476 sec. Joule Counter Range, at 15 Watts >> cpu0: MSR_PLATFORM_INFO: 0x8083df3011800 >> 8 * 100.0 = 800.0 MHz max efficiency frequency >> 24 * 100.0 = 2400.0 MHz base frequency >> cpu0: MSR_IA32_POWER_CTL: 0x0004005d (C1E auto-promotion: DISabled) >> cpu0: MSR_TURBO_RATIO_LIMIT: 0x1b1b1b1e >> 27 * 100.0 = 2700.0 MHz max turbo 4 active cores >> 27 * 100.0 = 2700.0 MHz max turbo 3 active cores >> 27 * 100.0 = 2700.0 MHz max turbo 2 active cores >> 30 * 100.0 = 3000.0 MHz max turbo 1 active cores >> cpu0: MSR_CONFIG_TDP_NOMINAL: 0x00000012 (base_ratio=18) >> cpu0: MSR_CONFIG_TDP_LEVEL_1: 0x0008005c (PKG_MIN_PWR_LVL1=0 >> PKG_MAX_PWR_LVL1=0 LVL1_RATIO=8 PKG_TDP_LVL1=92) >> cpu0: MSR_CONFIG_TDP_LEVEL_2: 0x001800c8 (PKG_MIN_PWR_LVL2=0 >> PKG_MAX_PWR_LVL2=0 LVL2_RATIO=24 PKG_TDP_LVL2=200) >> cpu0: MSR_CONFIG_TDP_CONTROL: 0x00000000 ( lock=0) >> cpu0: MSR_TURBO_ACTIVATION_RATIO: 0x00000011 (MAX_NON_TURBO_RATIO=17 >> lock=0) >> cpu0: MSR_PKG_CST_CONFIG_CONTROL: 0x1e008407 (UNdemote-C3, UNdemote- >> C1, demote-C3, demote-C1, locked, pkg-cstate-limit=7 (pc9)) >> cpu0: POLL: CPUIDLE CORE POLL IDLE >> cpu0: C1: MWAIT 0x00 >> cpu0: C1E: MWAIT 0x01 >> cpu0: C3: MWAIT 0x10 >> cpu0: C6: MWAIT 0x20 >> cpu0: C7s: MWAIT 0x32 >> cpu0: C8: MWAIT 0x40 >> cpu0: C9: MWAIT 0x50 >> cpu0: C10: MWAIT 0x60 >> cpu0: cpufreq driver: intel_pstate >> cpu0: cpufreq governor: powersave >> cpufreq intel_pstate no_turbo: 0 >> cpu0: MSR_MISC_FEATURE_CONTROL: 0x00000000 (L2-Prefetch L2-Prefetch- >> pair L1-Prefetch L1-IP-Prefetch) >> cpu0: MSR_IA32_ENERGY_PERF_BIAS: 0x00000006 (balanced) >> cpu0: MSR_CORE_PERF_LIMIT_REASONS, 0x1d210020 (Active: Auto-HWP, ) >> (Logged: MultiCoreTurbo, PkgPwrL2, PkgPwrL1, Amps, Auto-HWP, PROCHOT, >> ) >> cpu0: MSR_GFX_PERF_LIMIT_REASONS, 0x1c010000 (Active: ) (Logged: >> PROCHOT, PkgPwrL1, PkgPwrL2, ) >> cpu0: MSR_RING_PERF_LIMIT_REASONS, 0x0d010000 (Active: ) (Logged: >> PROCHOT, Amps, PkgPwrL1, PkgPwrL2, ) >> cpu0: MSR_RAPL_POWER_UNIT: 0x000a0e03 (0.125000 Watts, 0.000061 >> Joules, 0.000977 sec.) >> cpu0: MSR_PKG_POWER_INFO: 0x00000078 (15 W TDP, RAPL 0 - 0 W, >> 0.000000 sec.) >> cpu0: MSR_PKG_POWER_LIMIT: 0x420078001480c8 (UNlocked) >> cpu0: PKG Limit #1: ENabled (25.000000 Watts, 1.000000 sec, clamp >> DISabled) >> cpu0: PKG Limit #2: DISabled (15.000000 Watts, 0.002441* sec, clamp >> DISabled) >> cpu0: MSR_PP0_POLICY: 0 >> cpu0: MSR_PP0_POWER_LIMIT: 0x00000000 (UNlocked) >> cpu0: Cores Limit: DISabled (0.000000 Watts, 0.000977 sec, clamp >> DISabled) >> cpu0: MSR_PP1_POLICY: 0 >> cpu0: MSR_PP1_POWER_LIMIT: 0x00000000 (UNlocked) >> cpu0: GFX Limit: DISabled (0.000000 Watts, 0.000977 sec, clamp >> DISabled) >> cpu0: MSR_IA32_TEMPERATURE_TARGET: 0x00640000 (100 C) >> cpu0: MSR_IA32_PACKAGE_THERM_STATUS: 0x882d0808 (55 C) >> cpu0: MSR_IA32_PACKAGE_THERM_INTERRUPT: 0x00000003 (100 C, 100 C) >> cpu0: MSR_IA32_THERM_STATUS: 0x882d0808 (55 C +/- 1) >> cpu0: MSR_IA32_THERM_INTERRUPT: 0x00000013 (100 C, 100 C) >> cpu2: MSR_IA32_THERM_STATUS: 0x88300808 (52 C +/- 1) >> cpu2: MSR_IA32_THERM_INTERRUPT: 0x00000013 (100 C, 100 C) >> cpu0: MSR_PKGC3_IRTL: 0x00008842 (valid, 67584 ns) >> cpu0: MSR_PKGC6_IRTL: 0x00008873 (valid, 117760 ns) >> cpu0: MSR_PKGC7_IRTL: 0x00008891 (valid, 148480 ns) >> cpu0: MSR_PKGC8_IRTL: 0x000088e4 (valid, 233472 ns) >> cpu0: MSR_PKGC9_IRTL: 0x00008945 (valid, 332800 ns) >> cpu0: MSR_PKGC10_IRTL: 0x00009003 (valid, 3 ns) >> >> >> And this is what I get after I unplug the laptop: >> >> turbostat version 18.06.20 - Len Brown <lenb@...nel.org> >> CPUID(0): GenuineIntel 13 CPUID levels; family:model:stepping >> 0x6:45:1 (6:69:1) >> CPUID(1): SSE3 MONITOR - EIST TM2 TSC MSR ACPI-TM HT TM >> CPUID(6): APERF, No-TURBO, DTS, PTM, No-HWP, No-HWPnotify, No- >> HWPwindow, No-HWPepp, No-HWPpkg, EPB >> cpu3: MSR_IA32_MISC_ENABLE: 0x4000850089 (TCC EIST MWAIT PREFETCH No- >> TURBO) >> CPUID(7): No-SGX >> cpu3: MSR_MISC_PWR_MGMT: 0x00400000 (ENable-EIST_Coordination >> DISable-EPB DISable-OOB) >> RAPL: 17476 sec. Joule Counter Range, at 15 Watts >> cpu3: MSR_PLATFORM_INFO: 0x8083df3011800 >> 8 * 100.0 = 800.0 MHz max efficiency frequency >> 24 * 100.0 = 2400.0 MHz base frequency >> cpu3: MSR_IA32_POWER_CTL: 0x0004005d (C1E auto-promotion: DISabled) >> cpu3: MSR_TURBO_RATIO_LIMIT: 0x1b1b1b1e >> 27 * 100.0 = 2700.0 MHz max turbo 4 active cores >> 27 * 100.0 = 2700.0 MHz max turbo 3 active cores >> 27 * 100.0 = 2700.0 MHz max turbo 2 active cores >> 30 * 100.0 = 3000.0 MHz max turbo 1 active cores >> cpu3: MSR_CONFIG_TDP_NOMINAL: 0x00000012 (base_ratio=18) >> cpu3: MSR_CONFIG_TDP_LEVEL_1: 0x0008005c (PKG_MIN_PWR_LVL1=0 >> PKG_MAX_PWR_LVL1=0 LVL1_RATIO=8 PKG_TDP_LVL1=92) >> cpu3: MSR_CONFIG_TDP_LEVEL_2: 0x001800c8 (PKG_MIN_PWR_LVL2=0 >> PKG_MAX_PWR_LVL2=0 LVL2_RATIO=24 PKG_TDP_LVL2=200) >> cpu3: MSR_CONFIG_TDP_CONTROL: 0x00000000 ( lock=0) >> cpu3: MSR_TURBO_ACTIVATION_RATIO: 0x00000011 (MAX_NON_TURBO_RATIO=17 >> lock=0) >> cpu3: MSR_PKG_CST_CONFIG_CONTROL: 0x1e008407 (UNdemote-C3, UNdemote- >> C1, demote-C3, demote-C1, locked, pkg-cstate-limit=7 (pc9)) >> cpu3: POLL: CPUIDLE CORE POLL IDLE >> cpu3: C1: MWAIT 0x00 >> cpu3: C1E: MWAIT 0x01 >> cpu3: C3: MWAIT 0x10 >> cpu3: C6: MWAIT 0x20 >> cpu3: C7s: MWAIT 0x32 >> cpu3: C8: MWAIT 0x40 >> cpu3: C9: MWAIT 0x50 >> cpu3: C10: MWAIT 0x60 >> cpu3: cpufreq driver: intel_pstate >> cpu3: cpufreq governor: powersave >> cpufreq intel_pstate no_turbo: 1 >> cpu3: MSR_MISC_FEATURE_CONTROL: 0x00000000 (L2-Prefetch L2-Prefetch- >> pair L1-Prefetch L1-IP-Prefetch) >> cpu0: MSR_IA32_ENERGY_PERF_BIAS: 0x00000006 (balanced) >> cpu0: MSR_CORE_PERF_LIMIT_REASONS, 0x1d210000 (Active: ) (Logged: >> MultiCoreTurbo, PkgPwrL2, PkgPwrL1, Amps, Auto-HWP, PROCHOT, ) >> cpu0: MSR_GFX_PERF_LIMIT_REASONS, 0x1c010000 (Active: ) (Logged: >> PROCHOT, PkgPwrL1, PkgPwrL2, ) >> cpu0: MSR_RING_PERF_LIMIT_REASONS, 0x0d010000 (Active: ) (Logged: >> PROCHOT, Amps, PkgPwrL1, PkgPwrL2, ) >> cpu0: MSR_RAPL_POWER_UNIT: 0x000a0e03 (0.125000 Watts, 0.000061 >> Joules, 0.000977 sec.) >> cpu0: MSR_PKG_POWER_INFO: 0x00000078 (15 W TDP, RAPL 0 - 0 W, >> 0.000000 sec.) >> cpu0: MSR_PKG_POWER_LIMIT: 0x420078001480c8 (UNlocked) >> cpu0: PKG Limit #1: ENabled (25.000000 Watts, 1.000000 sec, clamp >> DISabled) >> cpu0: PKG Limit #2: DISabled (15.000000 Watts, 0.002441* sec, clamp >> DISabled) >> cpu0: MSR_PP0_POLICY: 0 >> cpu0: MSR_PP0_POWER_LIMIT: 0x00000000 (UNlocked) >> cpu0: Cores Limit: DISabled (0.000000 Watts, 0.000977 sec, clamp >> DISabled) >> cpu0: MSR_PP1_POLICY: 0 >> cpu0: MSR_PP1_POWER_LIMIT: 0x00000000 (UNlocked) >> cpu0: GFX Limit: DISabled (0.000000 Watts, 0.000977 sec, clamp >> DISabled) >> cpu0: MSR_IA32_TEMPERATURE_TARGET: 0x00640000 (100 C) >> cpu0: MSR_IA32_PACKAGE_THERM_STATUS: 0x882f0808 (53 C) >> cpu0: MSR_IA32_PACKAGE_THERM_INTERRUPT: 0x00000003 (100 C, 100 C) >> cpu0: MSR_IA32_THERM_STATUS: 0x882f0808 (53 C +/- 1) >> cpu0: MSR_IA32_THERM_INTERRUPT: 0x00000013 (100 C, 100 C) >> cpu2: MSR_IA32_THERM_STATUS: 0x88300808 (52 C +/- 1) >> cpu2: MSR_IA32_THERM_INTERRUPT: 0x00000013 (100 C, 100 C) >> cpu3: MSR_PKGC3_IRTL: 0x00008842 (valid, 67584 ns) >> cpu3: MSR_PKGC6_IRTL: 0x00008873 (valid, 117760 ns) >> cpu3: MSR_PKGC7_IRTL: 0x00008891 (valid, 148480 ns) >> cpu3: MSR_PKGC8_IRTL: 0x000088e4 (valid, 233472 ns) >> cpu3: MSR_PKGC9_IRTL: 0x00008945 (valid, 332800 ns) >> cpu3: MSR_PKGC10_IRTL: 0x00009003 (valid, 3 ns) >> >> >> MSR_CORE_PERF_LIMIT_REASONS seems to have a different value >> when plugged in depending on how the laptop booted. I don't >> know if this is relevant, but this is what I noticed. >> >> Right after a reboot while plugged in, I get: >> cpu0: MSR_CORE_PERF_LIMIT_REASONS, 0x1d201000 (Active: >> MultiCoreTurbo, ) (Logged: MultiCoreTurbo, PkgPwrL2, PkgPwrL1, Amps, >> Auto-HWP, ) >> If unplug and replug, I get: >> cpu0: MSR_CORE_PERF_LIMIT_REASONS, 0x1d210020 (Active: Auto-HWP, ) >> (Logged: MultiCoreTurbo, PkgPwrL2, PkgPwrL1, Amps, Auto-HWP, PROCHOT, >> ) >> >> If the laptop booted while unplgged, I constantly get: >> cpu0: MSR_CORE_PERF_LIMIT_REASONS, 0x14000000 (Active: ) (Logged: >> MultiCoreTurbo, PkgPwrL1, ) >> >> >>> Also output of acpidump? >> >> You can find it here: >> https://bugzilla.kernel.org/attachment.cgi?id=178381 >> >>> >>>> Plugged -> Unplugged: >>>> >>>> [ 40.046116] CPU 0: _PPC is 6 - frequency limited >>>> [ 40.046128] intel_pstate: policy->max > max non turbo >>>> frequency >>>> [ 40.046131] intel_pstate: set_policy cpuinfo.max 3000000 >>>> policy- >>>>> max 3000000 >>>> >>>> [ 40.046134] intel_pstate: cpu:0 max_state 30 min_policy_perf:8 >>>> max_policy_perf:30 >>>> [ 40.046137] intel_pstate: cpu:0 global_min:8 global_max:30 >>>> [ 40.046140] intel_pstate: cpu:0 max_perf_ratio:30 >>>> min_perf_ratio:8 >>>> [ 40.162173] CPU 0: _PPC is 6 - frequency limited >>>> [ 40.162186] intel_pstate: policy->max > max non turbo >>>> frequency >>>> [ 40.162190] intel_pstate: set_policy cpuinfo.max 3000000 >>>> policy- >>>>> max 3000000 >>>> >>>> [ 40.162194] intel_pstate: cpu:0 max_state 30 min_policy_perf:8 >>>> max_policy_perf:30 >>>> [ 40.162197] intel_pstate: cpu:0 global_min:8 global_max:30 >>>> [ 40.162200] intel_pstate: cpu:0 max_perf_ratio:30 >>>> min_perf_ratio:8 >>>> [ 40.162215] CPU 0: _PPC is 6 - frequency limited >>>> [ 40.162220] intel_pstate: policy->max > max non turbo >>>> frequency >>>> [ 40.162223] intel_pstate: set_policy cpuinfo.max 3000000 >>>> policy- >>>>> max 3000000 >>>> >>>> [ 40.162226] intel_pstate: cpu:0 max_state 30 min_policy_perf:8 >>>> max_policy_perf:30 >>>> [ 40.162228] intel_pstate: cpu:0 global_min:8 global_max:30 >>>> [ 40.162230] intel_pstate: cpu:0 max_perf_ratio:30 >>>> min_perf_ratio:8 >>>> [ 40.162237] CPU 0: _PPC is 6 - frequency limited >>>> [ 40.162241] intel_pstate: policy->max > max non turbo >>>> frequency >>>> [ 40.162243] intel_pstate: set_policy cpuinfo.max 3000000 >>>> policy- >>>>> max 3000000 >>>> >>>> [ 40.162245] intel_pstate: cpu:0 max_state 30 min_policy_perf:8 >>>> max_policy_perf:30 >>>> [ 40.162247] intel_pstate: cpu:0 global_min:8 global_max:30 >>>> [ 40.162249] intel_pstate: cpu:0 max_perf_ratio:30 >>>> min_perf_ratio:8 >>>> [ 40.162257] CPU 0: _PPC is 6 - frequency limited >>>> [ 40.162261] intel_pstate: policy->max > max non turbo >>>> frequency >>>> [ 40.162263] intel_pstate: set_policy cpuinfo.max 3000000 >>>> policy- >>>>> max 3000000 >>>> >>>> [ 40.162265] intel_pstate: cpu:0 max_state 30 min_policy_perf:8 >>>> max_policy_perf:30 >>>> [ 40.162267] intel_pstate: cpu:0 global_min:8 global_max:30 >>>> [ 40.162269] intel_pstate: cpu:0 max_perf_ratio:30 >>>> min_perf_ratio:8 >>>> >>>> Unplugged -> Plugged: >>>> >>>> [ 52.648535] CPU 0: _PPC is 6 - frequency limited >>>> [ 52.648553] intel_pstate: set_policy cpuinfo.max 3000000 >>>> policy- >>>>> max 1700000 >>>> >>>> [ 52.648558] intel_pstate: cpu:0 max_state 17 min_policy_perf:8 >>>> max_policy_perf:17 >>>> [ 52.648562] intel_pstate: cpu:0 global_min:8 global_max:30 >>>> [ 52.648566] intel_pstate: cpu:0 max_perf_ratio:17 >>>> min_perf_ratio:8 >>>> [ 52.648583] CPU 0: _PPC is 6 - frequency limited >>>> [ 52.648590] intel_pstate: set_policy cpuinfo.max 3000000 >>>> policy- >>>>> max 1700000 >>>> >>>> [ 52.648595] intel_pstate: cpu:0 max_state 17 min_policy_perf:8 >>>> max_policy_perf:17 >>>> [ 52.648598] intel_pstate: cpu:0 global_min:8 global_max:30 >>>> [ 52.648602] intel_pstate: cpu:0 max_perf_ratio:17 >>>> min_perf_ratio:8 >>>> [ 52.656093] CPU 0: _PPC is 6 - frequency limited >>>> [ 52.656111] intel_pstate: set_policy cpuinfo.max 3000000 >>>> policy- >>>>> max 1700000 >>>> >>>> [ 52.656116] intel_pstate: cpu:0 max_state 17 min_policy_perf:8 >>>> max_policy_perf:17 >>>> [ 52.656120] intel_pstate: cpu:0 global_min:8 global_max:30 >>>> [ 52.656123] intel_pstate: cpu:0 max_perf_ratio:17 >>>> min_perf_ratio:8 >>>> [ 52.775577] CPU 0: _PPC is 6 - frequency limited >>>> [ 52.775594] intel_pstate: set_policy cpuinfo.max 3000000 >>>> policy- >>>>> max 1700000 >>>> >>>> [ 52.775598] intel_pstate: cpu:0 max_state 17 min_policy_perf:8 >>>> max_policy_perf:17 >>>> [ 52.775601] intel_pstate: cpu:0 global_min:8 global_max:30 >>>> [ 52.775604] intel_pstate: cpu:0 max_perf_ratio:17 >>>> min_perf_ratio:8 >>>> [ 53.028620] CPU 0: _PPC is 6 - frequency limited >>>> [ 53.028637] intel_pstate: set_policy cpuinfo.max 3000000 >>>> policy- >>>>> max 1700000 >>>> >>>> [ 53.028643] intel_pstate: cpu:0 max_state 17 min_policy_perf:8 >>>> max_policy_perf:17 >>>> [ 53.028647] intel_pstate: cpu:0 global_min:8 global_max:30 >>>> [ 53.028651] intel_pstate: cpu:0 max_perf_ratio:17 >>>> min_perf_ratio:8 >>>> >>>>> and send dmesg after you change power sources. >>>>> >>>>> - Also try with >>>>> intel_pstate=disable dyndbg="file processor_perflib.c +p" >>>> >>>> Nothing gets printed with this one. >>>> >>>> Thanks, >>>> Gabriele >>>> >>>>> and send dmesg. >>>>> >>>>> Thanks, >>>>> Srinivas >>>>> >>>>>
Powered by blists - more mailing lists