New: scaling_cur_freq very different from cpuinfo_cur_freq on Acer Predator Helios 500 PH517-61-R0GX
https://bugzilla.kernel.org/show_bug.cgi?id=206517
Bug ID: 206517
Summary: scaling_cur_freq very different from cpuinfo_cur_freq
on Acer Predator Helios 500 PH517-61-R0GX
Product: Power Management
Version: 2.5
Kernel Version: 5.5.1
Hardware: All
OS: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: cpufreq
Assignee: [email protected]
Reporter: [email protected]
Regression: NoOn an Acer Predator Helios 500 PH517-61-R0GX, scaling_cur_freq values can vary greatly from cpuinfo_cur_freq:
$ sudo cat /sys/devices/system/cpu/*/cpufreq/cpuinfo_cur_freq 3200000 3200000 3200000 3200000 3200000 3200000 3200000 3200000 3200000 3200000 3200000 3200000 3200000 3200000 3200000 3200000 $ cat /sys/devices/system/cpu/*/cpufreq/scaling_cur_freq 548955 548955 548955 548955 548955 548955 548955 548955 548955 548955 548955 548955 548955 548955 548955 548955
Unfortunately, the performance I'm seeing on this box while compiling stuff makes me think scaling_cur_freq is reporting correctly and cpuinfo_cur_freq is telling lies.
This might be related to bug 203035
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[Bug 206517] scaling_cur_freq very different from cpuinfo_cur_freq on Acer Predator Helios 500 PH517-61-R0GX
https://bugzilla.kernel.org/show_bug.cgi?id=206517
Thomas Renninger ([email protected]) changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |[email protected]
--- Comment #1 from Thomas Renninger ([email protected]) --- Best use:
cpupower monitor
You can also measure workloads, e.g. when compiling something:
cpupower monitor make
Not sure what distro you are using and what the name of the package or whether cpupower is packaged there... The sources, even it's userspace is part of the kernel git repo:tools/power/cpupower
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[Bug 206517] scaling_cur_freq very different from cpuinfo_cur_freq on Acer Predator Helios 500 PH517-61-R0GX
In reply to [email protected]https://bugzilla.kernel.org/show_bug.cgi?id=206517
Zhang Rui ([email protected]) changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |NEEDINFO
CC| |[email protected]--- Comment #2 from Zhang Rui ([email protected]) ---
why I can not see this file /sys/devices/system/cpu/*/cpufreq/cpuinfo_cur_freq?
please run "turbostat -o ts.out sleep 10" while compiling, and see what frequency is reported there.
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[Bug 206517] scaling_cur_freq very different from cpuinfo_cur_freq on Acer Predator Helios 500 PH517-61-R0GX
In reply to [email protected]https://bugzilla.kernel.org/show_bug.cgi?id=206517
Zhang Rui ([email protected]) changed:
What |Removed |Added
----------------------------------------------------------------------------
Assignee|[email protected] |[email protected]
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