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acpicpu slowing down computer [was Re: firefox slowness -- X server problem?]
On Wed, Aug 18, 2010 at 07:10:21PM +0200, Jens Rehsack wrote:
> I've read something regarding a select() change on current@. When this was
> introduced first time, my firefox or xchat was unbearably slow, even switching
> between tabs of my gnome-terminal takes up to two seconds.
> When the codes was taken out for analysis, it was fast again, came back,
> slow again. I currently play around with Xen, and subjective feeling,
> running a Xen system is slightly faster than native (except compiling
> Probably it's a hallucination (because the pausing when switching context
> is extremely nerving), but I hadn't time to take a deeper look.
Following your comment, I tried switching kernels, leaving the
Going back to a kernel from 20100702, firefox was fast again.
I looked at the dmesg differences and found that I had enabled acpicpu
in the meantime. I rebuilt a kernel using sources from yesterday, but
disabling acpicpu, and firefox is still fast; with a kernel from
yesterday and acpicpu enabled, it is slow.
So, my original diagnosis was incorrect. It seems to be acpicpu
related, at least for me.
During boot, I always get:
aibs0: warning over limit on 'MB Temperature'
aibs0: warning under limit on 'CHASSIS1 FAN Speed'
aibs0: warning under limit on 'CHASSIS2 FAN Speed'
aibs0: warning under limit on 'CHASSIS3 FAN Speed'
aibs0: warning under limit on 'POWER FAN Speed'
but envstat output right (no acpicpu) now looks ok:
Current CritMax WarnMax WarnMin CritMin Unit
Vcore Voltage: 0.936 1.600 0.800 V
+3.3 Voltage: 3.216 3.630 2.970 V
+5 Voltage: 4.878 5.500 4.500 V
+12 Voltage: 12.137 13.800 10.200 V
CPU Temperature: 49.000 75.000 60.000 degC
MB Temperature: 46.000 75.000 45.000 degC
CPU FAN Speed: 1318 7200 600 RPM
CHASSIS1 FAN Speed: 0 7200 600 RPM
CHASSIS2 FAN Speed: 0 7200 600 RPM
CHASSIS3 FAN Speed: 0 7200 600 RPM
POWER FAN Speed: 0 7200 RPM
cpu0 temperature: 53.000 degC
cpu1 temperature: 51.000 degC
cpu2 temperature: 53.000 degC
cpu3 temperature: 49.000 degC
The CPU is
cpu0: "Intel(R) Xeon(R) CPU W3520 @ 2.67GHz"
but it's often misregnized by NetBSD with a higher clockrate:
cpu0: Intel Core i7 (Nehalem) (686-class), 3207.40 MHz, id 0x106a5
(both lines from the same cpuctl output).
If someone wants more information, just let me know.
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