lkml.org 
[lkml]   [2000]   [Jan]   [24]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: CPU swapping on Linux
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.


-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.rutgers.edu
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 13:56    [W:0.185 / U:0.112 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site