Re: Results: 2.2.0-pre5 vs arcavm10 vs arcavm9 vs arcavm7

[Linus Torvalds <torvalds@transmeta.com>]

On Wed, 6 Jan 1999, Steve Bergman wrote:
> 
> Here are my latest numbers.  This is timing a complete kernel compile  (make
> clean;make depend;make;make modules;make modules_install)  in 16MB memory with
> netscape, kde, and various daemons running.  I unknowningly had two more daemons
> running in the background this time than last so the numbers can't be compared
> directly with my last test (Which I think I only sent to Andrea).  But all of
> these numbers are consistent with *each other*.
> 
> 
> kernel		Time	Maj pf	Min pf  Swaps
> ----------	-----	------	------	-----
> 2.2.0-pre5		18:19	522333	493803	27984
> arcavm10		19:57	556299	494163	12035
> arcavm9		19:55	553783	494444	12077
> arcavm7		18:39	538520	493287	11526

Don't look too closely at the "swaps" number - I think pre-5 just changed
accounting a bit. A lot of the "swaps" are really just dropping a virtual
mapping (that is later picked up again from the page cache or the swap
cache). 

Basically, pre-5 uses the page cache and the swap cache more actively as a
"victim cache", and that inflates the "swaps" number simply due to the
accounting issues. 

I guess I shouldn't count the simple "drop_pte" operation as a swap at
all, because it doesn't involve any IO.

		Linus

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