Messages in this thread | | | Date | Mon, 24 Jan 2000 05:52:24 +0100 (CET) | From | Rik van Riel <> | Subject | Re: CPU swapping on Linux |
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On Sun, 23 Jan 2000, Mark Hahn wrote:
> > I've done the calculation by hand and, assuming 150MB/sec > > (which is very optimistic for my machine), I arrive at a > > cacheflush_time of 5.3msec, instead of the 0.3usec (whatever, > > I'm testing 2.2 now) the kernel used before. > > well, if you have a dual P5/120, your cache size for these > calculations should be 16 or 32K. that is, the CPU-private L1 > cache, not the shared L2 cache. so ~200us should be the right > answer...
Indeed, 200us -- not 0.2us :)
I really should stop doing calculations like this at 5 am :)
> out of curiosity, what does /proc/cpuinfo report for your cache > size under 2.3?
I don't have a 2.3 running atm (and won't reboot because of a download), but they are Pentia classic with 2x 8kB cache.
regards,
Rik -- The Internet is not a network of computers. It is a network of people. That is its real strength.
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