CPU swapping on Linux

[Rik van Riel]

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
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