New: ondemand is slow
https://bugzilla.kernel.org/show_bug.cgi?id=19672
Summary: ondemand is slow
Product: Power Management
Version: 2.5
Kernel Version: 2.6.35
Platform: All
OS/Version: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: cpufreq
AssignedTo: [email protected]
ReportedBy: [email protected]
Regression: No
I find ondemand is allot slower than conservative for cpu bound tasks. My understanding is that performance wise, ondemand should be on par or slightly faster than conservative.
My chip is an intel core 2 duo, I think 4300. I am using 2.6.35 from Ubuntu.
On the kraken benchmark, ondemand completes in 34216.6ms +/- 2.3% where as
conservative completes in 25699.3ms +/- 5.6%
Again, it is my understanding that ondemand should not have this much of a slowdown.
Signature · 3 lines
Configure bugmail: https://bugzilla.kernel.org/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are the assignee for the bug.
[Bug 19672] ondemand is slow
https://bugzilla.kernel.org/show_bug.cgi?id=19672
Florian Mickler <[email protected]> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
CC| |[email protected]
Resolution| |CODE_FIX--- Comment #1 from Florian Mickler <[email protected]> 2011-01-24 13:01:27 --- a fix for this has been merged in .37-rc1:
commit 3f78a9f7fcee0e9b44a15f39ac382664e301fad5
Author: David C Niemi <[email protected]> Date: Wed Oct 6 16:54:24 2010 -0400
[CPUFREQ] add sampling_down_factor tunable to improve ondemand performance
Signature · 3 lines
Configure bugmail: https://bugzilla.kernel.org/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are the assignee for the bug.
[Bug 19672] ondemand is slow
In reply to [email protected]https://bugzilla.kernel.org/show_bug.cgi?id=19672
Florian Mickler <[email protected]> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |CLOSED
Signature · 3 lines
Configure bugmail: https://bugzilla.kernel.org/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are the assignee for the bug.