From: Ingo Molnar <mingo@elte.hu>
To: Linus Torvalds <torvalds@transmeta.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>,
Linux Kernel List <linux-kernel@vger.kernel.org>,
linux-mm@kvack.org, Marcelo Tosatti <marcelo@conectiva.com.br>,
Rik van Riel <riel@conectiva.com.br>,
Szabolcs Szakacsits <szaka@f-secure.com>
Subject: [patch] swap-speedup-2.4.3-B3
Date: Tue, 24 Apr 2001 07:44:45 +0200 (CEST) [thread overview]
Message-ID: <Pine.LNX.4.30.0104240714200.1227-100000@elte.hu> (raw)
In-Reply-To: <Pine.LNX.4.30.0104231707350.31693-200000@elte.hu>
the latest swap-speedup patch can be found at:
http://people.redhat.com/mingo/swap-speedup/swap-speedup-2.4.3-B3
(the patch is against 2.4.4-pre6 or 2.4.3-ac13.)
-B3 includes Marcelo's patch for another area that blocks unnecesserily on
locked swapcache pages: async swapcache readahead. Marcello did some tests
which shows that this fix brought some nice improvements too.
"make -j32 bzImage" using 128MB mem, 128MB swap, 4 CPUs:
stock 2.4.3-ac13
----------------
real 4m0.678s
user 4m2.870s
sys 0m38.920s
swap-speedup-A2
---------------
real 3m24.190s
user 4m1.070s
sys 0m31.950s
swap-speedup-B3 (A2 + Marcelo's swapin-readahead non-blocking patch)
---------------
real 3m7.410s
user 4m0.940s
sys 0m28.680s
ie. for this kernel compile test:
swap-speedup-A2 is a 18% speedup relative to stock 2.4.3-ac13
swap-speedup-B3 is a 28% speedup relative to stock 2.4.3-ac13
and the amount of CPU time spent in the kernel has been reduced
significantly as well.
I believe all the correctness and SMP-locking issues have been taken care
of in -B3 as well.
Ingo
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next prev parent reply other threads:[~2001-04-24 5:44 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-04-23 9:20 [patch] swap-speedup-2.4.3-A1, massive swapping speedup Ingo Molnar
2001-04-23 15:33 ` Rik van Riel
2001-04-23 16:05 ` [patch] swap-speedup-2.4.3-A2 Ingo Molnar
2001-04-23 17:17 ` Linus Torvalds
2001-04-23 16:54 ` Ingo Molnar
2001-04-24 5:44 ` Ingo Molnar [this message]
2001-04-24 16:38 ` [patch] swap-speedup-2.4.3-B3 Linus Torvalds
2001-04-25 2:28 ` Marcelo Tosatti
2001-04-23 16:53 ` [patch] swap-speedup-2.4.3-A1, massive swapping speedup Jonathan Morton
2001-04-23 17:10 ` Linus Torvalds
2001-04-23 22:13 ` Marcelo Tosatti
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