From mboxrd@z Thu Jan 1 00:00:00 1970
From: bugzilla-daemon@bugzilla.kernel.org
Subject: [Bug 19702] i5-450M CPU gets stuck in low/lowest state
Date: Mon, 1 Nov 2010 10:49:16 GMT
Message-ID: <201011011049.oA1AnGLM015691@demeter2.kernel.org>
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https://bugzilla.kernel.org/show_bug.cgi?id=19702
--- Comment #35 from Peter Ganzhorn 2010-11-01 10:49:11 ---
# dmesg | grep acpi-cpufreq
acpi-cpufreq: average (aperf/mperf) accounting disabled by user
acpi-cpufreq: average (aperf/mperf) accounting disabled by user
This patch actually *FIXED* the problem for me.
Please give me some instructions on how to use cpufreq-aperf - how do I use the
tool? When running it, it gives me an output like this (with the patched
kernel):
# cpufreq-aperf
CPU Average freq(KHz) Time in C0 Time in Cx C0 percentage
000 0500250 00 sec 041 ms 00 sec 958 ms 04
001 0460230 00 sec 056 ms 00 sec 943 ms 05
000 0500250 00 sec 045 ms 00 sec 954 ms 04
001 0620310 00 sec 056 ms 00 sec 943 ms 05
000 0480240 00 sec 033 ms 00 sec 966 ms 03
001 0520260 00 sec 054 ms 00 sec 945 ms 05
000 0580290 00 sec 109 ms 00 sec 890 ms 10
001 0580290 00 sec 123 ms 00 sec 876 ms 12
000 0560280 00 sec 179 ms 00 sec 820 ms 17
001 0540270 00 sec 239 ms 00 sec 760 ms 23
Do I have to create load on one or both cpu cores? Do I have to pass particular
options? And if I just have to run it, how long should I run it?
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