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New: cpufreq-info-008 only reports maximum "current frequency", contradict cpufreq stats and /proc/cpuinfo

Bug 33202 [email protected] 1 participant 8 messages Apr 13, 2011 – Jan 18, 2012

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https://bugzilla.kernel.org/show_bug.cgi?id=33202

Summary: cpufreq-info-008 only reports maximum "current
frequency", contradict cpufreq stats and /proc/cpuinfo
Product: Power Management
Version: 2.5
Kernel Version: 2.6.38.2-zen
Platform: All
OS/Version: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: cpufreq
AssignedTo: [email protected]
ReportedBy: [email protected]
Regression: No

Linux travelmate 2.6.38.2-zen #56 ZEN SMP Tue Apr 12 14:06:11 EEST 2011 i686 Intel(R) Core(TM) i3 CPU U 330 @ 1.20GHz GenuineIntel GNU/Linux

leho@travelmate ~ $ sudo cpufreq-info
cpufrequtils 008: cpufreq-info (C) Dominik Brodowski 2004-2009 Report errors and bugs to [email protected], please.
CPUs which run at the same hardware frequency: 0
CPUs which need to have their frequency coordinated by software: 0 maximum transition latency: 10.0 us.
hardware limits: 666 MHz - 1.20 GHz
available frequency steps: 1.20 GHz, 1.07 GHz, 933 MHz, 799 MHz, 666 MHz available cpufreq governors: ondemand, userspace, powersave, conservative,
performance
current policy: frequency should be within 666 MHz and 1.20 GHz.
The governor "conservative" may decide which speed to use within this range.
current CPU frequency is 1.20 GHz (asserted by call to hardware). cpufreq stats: 1.20 GHz:1.00%, 1.07 GHz:0.78%, 933 MHz:0.98%, 799 MHz:1.59%,
666 MHz:95.65% (9376)
analyzing CPU 1:
driver: acpi-cpufreq
CPUs which run at the same hardware frequency: 1
CPUs which need to have their frequency coordinated by software: 1 maximum transition latency: 10.0 us.
hardware limits: 666 MHz - 1.20 GHz
available frequency steps: 1.20 GHz, 1.07 GHz, 933 MHz, 799 MHz, 666 MHz available cpufreq governors: ondemand, userspace, powersave, conservative,
performance
current policy: frequency should be within 666 MHz and 1.20 GHz.
The governor "conservative" may decide which speed to use within this range.
current CPU frequency is 1.20 GHz (asserted by call to hardware). cpufreq stats: 1.20 GHz:0.51%, 1.07 GHz:0.44%, 933 MHz:0.85%, 799 MHz:1.46%,
666 MHz:96.73% (378)
analyzing CPU 2:
driver: acpi-cpufreq
CPUs which run at the same hardware frequency: 2
CPUs which need to have their frequency coordinated by software: 2 maximum transition latency: 10.0 us.
hardware limits: 666 MHz - 1.20 GHz
available frequency steps: 1.20 GHz, 1.07 GHz, 933 MHz, 799 MHz, 666 MHz available cpufreq governors: ondemand, userspace, powersave, conservative,
performance
current policy: frequency should be within 666 MHz and 1.20 GHz.
The governor "conservative" may decide which speed to use within this range.
current CPU frequency is 1.20 GHz (asserted by call to hardware). cpufreq stats: 1.20 GHz:0.82%, 1.07 GHz:0.67%, 933 MHz:0.97%, 799 MHz:1.48%,
666 MHz:96.05% (416)
analyzing CPU 3:
driver: acpi-cpufreq
CPUs which run at the same hardware frequency: 3
CPUs which need to have their frequency coordinated by software: 3 maximum transition latency: 10.0 us.
hardware limits: 666 MHz - 1.20 GHz
available frequency steps: 1.20 GHz, 1.07 GHz, 933 MHz, 799 MHz, 666 MHz available cpufreq governors: ondemand, userspace, powersave, conservative,
performance
current policy: frequency should be within 666 MHz and 1.20 GHz.
The governor "conservative" may decide which speed to use within this range.
current CPU frequency is 1.20 GHz (asserted by call to hardware). cpufreq stats: 1.20 GHz:0.20%, 1.07 GHz:0.20%, 933 MHz:0.47%, 799 MHz:0.70%,
666 MHz:98.43%

cat /proc/cpuinfo:
(234)
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 37
model name : Intel(R) Core(TM) i3 CPU U 330 @ 1.20GHz
stepping : 5
cpu MHz : 666.000
cache size : 3072 KB
physical id : 0
siblings : 4
core id : 0
cpu cores : 2
apicid : 0
initial apicid : 0
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 11
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov
pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx rdtscp lm constant_tsc arch_perfmon pebs bts xtopology nonstop_tsc aperfmperf pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm sse4_1 sse4_2 popcnt lahf_lm arat dts tpr_shadow vnmi flexpriority ept vpid
bogomips : 2400.28
clflush size : 64
cache_alignment : 64
address sizes : 36 bits physical, 48 bits virtual
power management:

processor : 1
vendor_id : GenuineIntel
cpu family : 6
model : 37
model name : Intel(R) Core(TM) i3 CPU U 330 @ 1.20GHz
stepping : 5
cpu MHz : 666.000
cache size : 3072 KB
physical id : 0
siblings : 4
core id : 0
cpu cores : 2
apicid : 1
initial apicid : 1
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 11
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov
pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx rdtscp lm constant_tsc arch_perfmon pebs bts xtopology nonstop_tsc aperfmperf pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm sse4_1 sse4_2 popcnt lahf_lm arat dts tpr_shadow vnmi flexpriority ept vpid
bogomips : 2400.11
clflush size : 64
cache_alignment : 64
address sizes : 36 bits physical, 48 bits virtual
power management:

processor : 2
vendor_id : GenuineIntel
cpu family : 6
model : 37
model name : Intel(R) Core(TM) i3 CPU U 330 @ 1.20GHz
stepping : 5
cpu MHz : 666.000
cache size : 3072 KB
physical id : 0
siblings : 4
core id : 2
cpu cores : 2
apicid : 4
initial apicid : 4
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 11
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov
pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx rdtscp lm constant_tsc arch_perfmon pebs bts xtopology nonstop_tsc aperfmperf pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm sse4_1 sse4_2 popcnt lahf_lm arat dts tpr_shadow vnmi flexpriority ept vpid
bogomips : 2400.08
clflush size : 64
cache_alignment : 64
address sizes : 36 bits physical, 48 bits virtual
power management:

processor : 3
vendor_id : GenuineIntel
cpu family : 6
model : 37
model name : Intel(R) Core(TM) i3 CPU U 330 @ 1.20GHz
stepping : 5
cpu MHz : 666.000
cache size : 3072 KB
physical id : 0
siblings : 4
core id : 2
cpu cores : 2
apicid : 5
initial apicid : 5
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 11
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov
pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx rdtscp lm constant_tsc arch_perfmon pebs bts xtopology nonstop_tsc aperfmperf pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm sse4_1 sse4_2 popcnt lahf_lm arat dts tpr_shadow vnmi flexpriority ept vpid
bogomips : 2398.58
clflush size : 64
cache_alignment : 64
address sizes : 36 bits physical, 48 bits virtual
power management:

at no point does cpufreq-info report a lower "current frequency". i also have a core i5 server in the room that has no such problem. as evident from cpufreq stats, majority of time is in fact spent in the frequency specified by governor so i'd say cpufreq-info is wrong here.

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#1 lore raw

[Bug 33202] cpufreq-info-008 only reports maximum "current frequency", contradicts cpufreq stats and /proc/cpuinfo

https://bugzilla.kernel.org/show_bug.cgi?id=33202

LK <[email protected]> changed:

What |Removed |Added
----------------------------------------------------------------------------

            Summary|cpufreq-info-008 only       |cpufreq-info-008 only
                   |reports maximum "current    |reports maximum "current
                   |frequency", contradict      |frequency", contradicts
                   |cpufreq stats and           |cpufreq stats and
                   |/proc/cpuinfo               |/proc/cpuinfo
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#2 lore raw

[Bug 33202] cpufreq-info 008 only reports maximum "current frequency", contradicts cpufreq stats and /proc/cpuinfo

In reply to [email protected]

https://bugzilla.kernel.org/show_bug.cgi?id=33202

LK <[email protected]> changed:

What |Removed |Added
----------------------------------------------------------------------------

            Summary|cpufreq-info-008 only       |cpufreq-info 008 only
                   |reports maximum "current    |reports maximum "current
                   |frequency", contradicts     |frequency", contradicts
                   |cpufreq stats and           |cpufreq stats and
                   |/proc/cpuinfo               |/proc/cpuinfo
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#3 lore raw

[Bug 33202] cpufreq-info 008 only reports maximum "current frequency", contradicts cpufreq stats and /proc/cpuinfo

In reply to [email protected]

https://bugzilla.kernel.org/show_bug.cgi?id=33202

Dominik Brodowski <[email protected]> changed:

What |Removed |Added
----------------------------------------------------------------------------
CC| |[email protected]

--- Comment #1 from Dominik Brodowski <[email protected]> 2011-04-13 10:54:58 --- Well, all cpufreq-info does is read out

/sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_cur_freq

or

/sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq

and then print the value being reported there. Do the values in those files change at all?

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#4 lore raw

[Bug 33202] cpufreq-info 008 only reports maximum "current frequency", contradicts cpufreq stats and /proc/cpuinfo

In reply to [email protected]

https://bugzilla.kernel.org/show_bug.cgi?id=33202

--- Comment #2 from LK <[email protected]> 2011-04-13 12:57:41 --- did watch -n 0.1 cat ...

/sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_cur_freq - does not change /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq - changes frequencies as expected

am i simply misunderstanding something here?

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#5 lore raw

[Bug 33202] cpufreq-info 008 only reports maximum "current frequency", contradicts cpufreq stats and /proc/cpuinfo

In reply to [email protected]

https://bugzilla.kernel.org/show_bug.cgi?id=33202

--- Comment #3 from Leho Kraav <[email protected]> 2011-04-14 15:18:44 --- after doing parameter changes, cpufreq-info now reports minimum frequencies as well. i may be able to produce a diff but it might be unlikely. im guessing this one can be closed until or if i get some more info.

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#6 lore raw

[Bug 33202] cpufreq-info 008 only reports maximum "current frequency", contradicts cpufreq stats and /proc/cpuinfo

In reply to [email protected]

https://bugzilla.kernel.org/show_bug.cgi?id=33202

Zhang Rui <[email protected]> changed:

What |Removed |Added
----------------------------------------------------------------------------

             Status|NEW                         |RESOLVED
                 CC|                            |[email protected]
         Resolution|                            |WILL_NOT_FIX

--- Comment #4 from Zhang Rui <[email protected]> 2012-01-18 03:27:03 --- (In reply to comment #3)

Quoted 2 lines

im guessing
this one can be closed until or if i get some more info.

Bug closed.

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#7 lore raw

[Bug 33202] cpufreq-info 008 only reports maximum "current frequency", contradicts cpufreq stats and /proc/cpuinfo

In reply to [email protected]

https://bugzilla.kernel.org/show_bug.cgi?id=33202

Zhang Rui <[email protected]> changed:

What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |CLOSED

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