linux-kernel - Re: (ondemand) CPU governor regression between 2.6.23 and 2.6.24

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Date:	Sat, 26 Jan 2008 19:46:51 +0100
From:	Toralf Förster <toralf.foerster@....de>
To:	Tomasz Chmielewski <mangoo@...g.org>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: (ondemand) CPU governor  regression between 2.6.23 and 2.6.24


The problem is the same as described here : http://lkml.org/lkml/2007/10/21/85
If I run dnetc even with lowest prority than the CPU stays at 600 MHz regardless
of any other load (eg. rsyncing, svn update, compiling, ...)

Stopping the dnetc process immediately speeds up the CPU up to 1.7 GHz.


Am Samstag, 26. Januar 2008 schrieben Sie:
> During the test, run top, and watch your CPU usage. Does it go above 80% 
> (the default for 
> /sys/devices/system/cpu/cpu0/cpufreq/ondemand/up_threshold).

No, instead I get :

 PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
 7294 dnetc     39  19   664  348  264 R 49.5  0.0   0:48.68 dnetc
 7310 tfoerste  20   0  1796  492  428 R 48.5  0.0   0:07.19 factor
 7050 root      20   0 96736 8872 3972 S  0.7  0.9   0:02.99 X


> What CPUFreq processor driver are you using?
I use the native kernel built-in ondemand governor. BTW, here are the settings:

n22 /sys/devices/system/cpu/cpu0/cpufreq/ondemand # tail -v *
==> ignore_nice_load <==
1

==> powersave_bias <==
0

==> sampling_rate <==
500000

==> sampling_rate_max <==
250000000

==> sampling_rate_min <==
250000

==> up_threshold <==
80


-- 
MfG/Sincerely

Toralf Förster
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