Messages in this thread | | | From | Tim Connors <> | Subject | Re: 2.5.47 scheduler problems? | Date | Mon, 18 Nov 2002 17:51:51 +1100 |
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In linux.kernel, you wrote: > Greetings, > > For testing swap throughput, I like to run make -j30 bzImage on my 500Mhz > PIII w. 128Mb ram. For testing interactivity, I fire up KDE, start a > smaller make -j, grab a window, and wave it around. > > With 2.4.20rc2+rc1aa1, running a -j10 build (not swapping) is very very > bad. However, if I set all tasks in the system to SCHED_FIFO or SCHED_RR > prior to this light make -j, I have a ~pretty smooth system. > > If I do the same in 2.5.47, I have no control of my box. Setting all tasks > to SCHED_FIFO or SCHED_RR prior to starting make -j10 bzImage, I can regain > control, but interactivity under load is basically not present.
Funny that.
> I used to be able to wave a window poorly at make -j25 (swapping heftily), > fairly smoothly at make -j20, and smoothly at make -j15 or below. This > with no SCHED_RR/SCHED_FIFO. (I haven't done much testing like this in > quite a while though)
Perhaps you should consider buying an extra 29 CPU's for you desktop?
-- TimC -- http://astronomy.swin.edu.au/staff/tconnors/
A Chemist who falls in acid is absorbed in work.
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