https://bugzilla.kernel.org/show_bug.cgi?id=46211
Summary: CPU frequency in /proc/cpuspeed incorrect on Intel
Turbo CPUs or if overclocked
Product: ACPI
Version: 2.5
Kernel Version: 3.6.0-rc1+
Platform: All
OS/Version: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: Power-Processor
AssignedTo: acpi_power-proces...@kernel-bugs.osdl.org
ReportedBy: dr.die...@gmail.com
Regression: No
When CPU is in standard Turbo mode /proc/cpuinfo and turbostat -v do not
display the same value.
If CPU is overclocked /proc/cpuinfo is not correct on any speedstep, idle or at
max. turbostat is correct when overclocked.
A bit of info here:
https://bugzilla.redhat.com/show_bug.cgi?id=746372
I don't understand the underlying principles but /proc/cpuinfo should be fixed
by using the methods used in turbostat or some other method like the one listed
at the bottom of this link:
http://code.google.com/p/i7z/
My testing was done on a Fedora 17 64bit box with mainline kernels, Asus MB and
an Intel(R) Core(TM) i5-2500K CPU @ 3.30GHz overclocked to 4.4Ghz.
Happy and willing to test any and all patches.
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