First, thanks for your answer! On Saturday 8 July 2006 23:13, Richard Fish wrote:
> Well, I would first upgrade my cooling fans so the processor couldn't > overheat! :-) Upgrading cooling fan in a laptop isn't the easiest thing to do! :) > But you could also enable "CPU freqency scaling" in the kernel, with > the ondemand governor, and use the various settings in > /sys/devices/system/cpu/cpu0/cpufreq to control the clock speed and > behavior of the system. You can use scaling_max_freq to specify the > maximum frequency of the processor so that it will not overheat or > throttle, no matter what the load is, and the > ondemand/ignore_nice_load setting will tell the governor not to > increase the clock speed for niced processes. This is better, but still affects the system as a whole, and higly depends on the capabilities of your CPU. What I really was looking for is something that can be configured per-process, to be able to limit only the CPU eaters. Though not exactly what I was looking for, the ondemand/ignore_nice_load approach is probably the closest to what I want, although it still requires to be running at reduced CPU frequency. While certainly avoiding overheating, IIUC the governors.txt file all the system runs at reduced speed, but the CPU-intensive tasks (if suitably reniced) do not make the CPU increase its frequency. And we're still talking about CPU speed, not % usage. I guess that truly limiting per-process CPU usage to a maximum percentage would require some modification to the kernel scheduuling code, After another bit of googling, I found this http://www.tls-technologies.com/CPU/cpu-main.html but unfortunately that is only for the 2.4 kernel. Thanks for the answer, -- [email protected] mailing list
