From: Nick Piggin <nickpiggin@yahoo.com.au>
To: Andi Kleen <ak@muc.de>
Cc: Darren Hart <dvhltc@us.ibm.com>,
lkml <linux-kernel@vger.kernel.org>, Ingo Molnar <mingo@elte.hu>
Subject: Re: sched_domains and Stream benchmark
Date: Tue, 27 Apr 2004 12:44:25 +1000 [thread overview]
Message-ID: <408DC909.7030605@yahoo.com.au> (raw)
In-Reply-To: <20040427023327.GB11321@colin2.muc.de>
Andi Kleen wrote:
>>I noticed your binary ran with N=2000000 which is only sufficient for a
>>2 proc 1 MB cache opteron box according to the documentation on the
>
>
> It does not seem to make any difference.
>
>
>>stream faq. I also noticed wide variation in results (25% or so) when
>>running with 4 threads on a 4 proc opteron on linux-2.6.5-mm5. Can you
>>provide me with the specs of the system you ran your tests on?
>
>
> Yes, mm5 is still broken because it has the "tuned to numasaurus" numa
> scheduler. Run it on a standard (non mm*) kernel or with Ingo's early
> load balance patch.
>
Now what is wrong with it? I thought you said it is OK
now that Ingo's balance-on-clone is implemented, and
that you also saw similar variation in results with
numasched?
next prev parent reply other threads:[~2004-04-27 2:44 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1N7xQ-7fh-29@gated-at.bofh.it>
2004-04-20 18:58 ` sched_domains and Stream benchmark Andi Kleen
2004-04-26 22:30 ` Darren Hart
2004-04-27 2:33 ` Andi Kleen
2004-04-27 2:44 ` Nick Piggin [this message]
2004-04-27 2:48 ` Andi Kleen
2004-04-27 2:54 ` Ingo Molnar
2004-04-27 16:47 ` Darren Hart
2004-04-27 21:03 ` Andi Kleen
2004-04-28 9:47 ` Zoltan Menyhart
2004-04-28 17:20 ` Andi Kleen
2004-04-20 17:43 Darren Hart
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