From: "Martin J. Bligh" <Martin.Bligh@us.ibm.com>
To: Andrea Arcangeli <andrea@suse.de>
Cc: Andrew Morton <akpm@zip.com.au>,
Martin Schwidefsky <schwidefsky@de.ibm.com>,
linux-kernel@vger.kernel.org, Alan Cox <alan@lxorguk.ukuu.org.uk>,
Rik van Riel <riel@conectiva.com.br>
Subject: Re: Bug with shared memory.
Date: Mon, 20 May 2002 10:23:05 -0700 [thread overview]
Message-ID: <221520000.1021915385@flay> (raw)
In-Reply-To: <20020520163724.GI21806@dualathlon.random>
>> I've been benchmarking rmap 13 against mainline (2.4.19-pre7)
>> and with the latest lock breakup changes performance now seems
>> to be about equivalent to mainline (for kernel compile on NUMA-Q).
>> Those changes reduced system time from 650s to 160s. The only
>
> How much are you swapping in your workload? (as said the fast paths are
> hurted a little so it's expected that it's almost as fast as mainline
> with a kernel compile, similar to the fact we also add anon pages to the
> lru list). I think you're only exercising the fast paths in your
> workload, not the memory balancing that is the whole point of the change.
No swapping. We fixed the horrendous locking problem we were seeing,
but this was only one test - obviously others are needed. But I think we're
in agreement that it's time to give it a beating and see what happens ;-)
M.
next prev parent reply other threads:[~2002-05-20 17:24 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-05-14 15:13 Bug with shared memory Martin Schwidefsky
2002-05-14 19:33 ` Andrew Morton
2002-05-15 22:42 ` Mike Kravetz
2002-05-15 23:07 ` Andrew Morton
2002-05-17 17:53 ` Bill Davidsen
2002-05-17 20:07 ` Mike Kravetz
2002-05-17 20:29 ` Anton Blanchard
2002-05-20 4:30 ` Andrea Arcangeli
2002-05-20 5:21 ` Andrew Morton
2002-05-20 11:34 ` Andrey Savochkin
2002-05-20 14:15 ` Andrea Arcangeli
2002-05-20 19:24 ` Rik van Riel
2002-05-20 23:46 ` Andrea Arcangeli
2002-05-21 0:14 ` Martin J. Bligh
2002-05-21 1:40 ` Andrea Arcangeli
2002-05-20 16:22 ` Martin J. Bligh
2002-05-20 19:38 ` Rik van Riel
2002-05-20 20:06 ` William Lee Irwin III
2002-05-20 16:13 ` Martin J. Bligh
2002-05-20 16:37 ` Andrea Arcangeli
2002-05-20 17:23 ` Martin J. Bligh [this message]
2002-05-20 17:32 ` William Lee Irwin III
2002-05-24 7:33 ` inode highmem imbalance fix [Re: Bug with shared memory.] Andrea Arcangeli
2002-05-24 7:51 ` William Lee Irwin III
2002-05-24 8:04 ` Andrew Morton
2002-05-24 15:20 ` Andrea Arcangeli
2002-05-24 11:47 ` Ed Tomlinson
2002-05-30 11:25 ` Denis Lunev
2002-05-30 17:59 ` Andrea Arcangeli
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