From: Nick Piggin <piggin@cyberone.com.au>
To: Linus Torvalds <torvalds@osdl.org>, Andrew Morton <akpm@osdl.org>
Cc: linux-kernel <linux-kernel@vger.kernel.org>
Subject: lmbench context switch regression
Date: Wed, 05 Nov 2003 23:28:32 +1100 [thread overview]
Message-ID: <3FA8ECF0.8020800@cyberone.com.au> (raw)
Hi,
I'm seeing quite a large context switch speed regression as reported
by lmbench when I patched from test9 to test9-mm2.
The obvious thing I can see from the patch is the PF_DEAD finish_task_switch
change. I don't have time to investigate further tonight though.
lmbench two 0 sized processes context switch times go from around 1.80us to
2.60us on my PIII 650 (UP).
next reply other threads:[~2003-11-05 12:28 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-11-05 12:28 Nick Piggin [this message]
2003-11-05 23:16 ` lmbench context switch regression Nick Piggin
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