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From: Anton Blanchard <anton@linuxcare.com.au>
To: "Stephen C. Tweedie" <sct@redhat.com>
Cc: torvalds@transmeta.com, linux-kernel@vger.kernel.org
Subject: Re: [PATCH]: Only one memory zone for sparc64
Date: Sat, 17 Mar 2001 13:45:51 +1100	[thread overview]
Message-ID: <20010317134551.A3403@linuxcare.com> (raw)
In-Reply-To: <20010315191352.D1598@linuxcare.com> <20010316121654.C1771@redhat.com>
In-Reply-To: <20010316121654.C1771@redhat.com>; from sct@redhat.com on Fri, Mar 16, 2001 at 12:16:54PM +0000

 
> I'd be surprised if dbench was anything other than disk-bound on most
> systems.  On any of my machines, the standard error of a single dbench
> run is *way* larger than 1%, and I'd expect to have to run the
> benchmark a dozen times to get a confidence interval small enough to
> detect a 1% performance change: are your runs repeatable enough to be
> this sensitive to the effect of the allocator?

With 2G RAM and:

kill -STOP <kupdated>
echo "90 64 64 256 5120 30720 95 0 0" > /proc/sys/vm/bdflush

I dont do one single disk interrupt for a dbench 60 :)
At this stage dbench runs become more repeatable.

Anton

      reply	other threads:[~2001-03-17  2:51 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2001-03-15  8:13 [PATCH]: Only one memory zone for sparc64 Anton Blanchard
2001-03-15 12:36 ` Rik van Riel
2001-03-16 12:16 ` Stephen C. Tweedie
2001-03-17  2:45   ` Anton Blanchard [this message]

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