Messages in this thread | | | Date | Thu, 7 Jan 1999 09:35:41 -0800 (PST) | From | Linus Torvalds <> | Subject | Re: Results: 2.2.0-pre5 vs arcavm10 vs arcavm9 vs arcavm7 |
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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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