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--- Begin Message ---
Package: tpctl
Severity: normal
-------- Forwarded Message --------
From: James McCaw <[EMAIL PROTECTED]>
To: Thomas Hood <[EMAIL PROTECTED]>
Subject: Re: tpctl: apmiser maxes out the cpu load
Date: Mon, 07 Feb 2005 22:08:10 +1100
Hi Thomas,
Ahhh, I just uncovered a rather amusing bug while trying to test other
settings. "--term" and "--trendiness" are reported in reverse in
syslog...I don't know if it is just your syslog output (and the
behaviour of apmiser is correct) or if the actual values are reversed.
To see what I mean, just set --term=4 in /etc/default/apmiser and then
watch your syslog. You will see that trendiness has changed, term is
unchanged. Vice-versa if you set trendiness. :-)
Anyway, that seems to make it rather difficult to diagnose what else
makes a difference - what I can tell you is that, playing with lots of
different settings, the CPU load experienced is directly related to how
often apmiser wants to switch power mode. So if syslog reports fewer
changes, my load is lower. Whenever there is a switch, I get a big spike
in CPU load.
This seems to be similar to the ibam problems my machine displays -
talking to the bios with tpctl calls is incredibly expensive. It seems
unique to IBM T20s...oh well. Anecdotally, the problem was so bad with
ibam that it reduced my battery time from 2.1hrs down to just 1hr...all
through regular tpctl probes. :-( I resolved the problem by
significantly reducing how often ibam queried the bios.
Hope that extra info helps.
Regards,
James
Thomas Hood wrote:
> On Tue, 2005-02-01 at 14:34 +1100, James McCaw wrote:
>
> > When apmiser is enabled on my IBM Thinkpad T20 the cpu load is so high that
> > apmiser continually switches between saving power and setting the cpu to
> > its highest performance option. This obviously renders the program useless.
> >
>
>
> Thanks for the report. Are there any other settings that render apmiser
> non-useless on your machine? See the apmiser man page.
>
>
--
James McCaw
School of Physics
University of Melbourne, VIC 3010, AUSTRALIA
Phone: (613) 8344 7129
Email: [EMAIL PROTECTED]
--
Thomas Hood <[EMAIL PROTECTED]>
--- End Message ---
--- Begin Message ---
This package has been removed from Debian unstable. I'm therefore
closing this bug report. The package has been removed because it's
obsolete (see #415126).
--
Martin Michlmayr
http://www.cyrius.com/
--- End Message ---
