Re: [suse-amd64] Strange system process takeover

Hi Guys, On Monday 15 Dec 2003 6:34 am, Andreas Jaeger wrote:

Jeremy Sonander writes:

...

Hello,

I have a Suse Linux 9.0 64 bit Linux installation running on an AMD Athlon 64 3200 processor.

I find when I first start a cpu intensive run of one of our software tools, it starts off with over 90 percent of the cpu. However after a few minutes its fraction of the CPU drains away to under 20%.

Can you run as root "rccpufreqd high" before and check whether that changes anything? We have cpufreqd running which throttles down your CPU to save power and reduce noise. It could give a bad interaction for you. If it does, disable cpufreqd or configure it differently (via /etc/sysconfig),

I had cpufreqd disabled since it locked up the machine. However I find if I start it and enter this command straight away, the system continues running. However load graphs still show something taking over the cpu. I think you are on the right track though since the speed decrease occurs much more slowly when the computer is first turned on and still cold which suggests power management. I notice two more clues. 1 Top shows the user program as having 95% of the cpu as you would hope. KPM shows a much lower percentage that corresponds to the load graph. Currently 37% of the cpu consumed by the only intentionally running program. 2 Its not related to running 32 bit code, since setiathome excutables for x86_64 also show the problem. Is there anything else I should try. I have legacy usb turned off in the bios. Jeremy.

Andreas

-- Jeremy Sonander. Saros Technology Limited. The Spirella Building, Bridge Road, Letchworth, SG6 4ET. Tel 01462 476111, Fax 01462 476112. For Support email support@saros.co.uk