linux-kernel - Re: [RFC] AutoNUMA alpha6

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Date:	Tue, 20 Mar 2012 16:41:06 -0700
From:	Dan Smith <danms@...ibm.com>
To:	Andrea Arcangeli <aarcange@...hat.com>
Cc:	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...e.hu>, Paul Turner <pjt@...gle.com>,
	Suresh Siddha <suresh.b.siddha@...el.com>,
	Mike Galbraith <efault@....de>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	Lai Jiangshan <laijs@...fujitsu.com>,
	Bharata B Rao <bharata.rao@...il.com>,
	Lee Schermerhorn <Lee.Schermerhorn@...com>,
	Rik van Riel <riel@...hat.com>,
	Johannes Weiner <hannes@...xchg.org>,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [RFC] AutoNUMA alpha6

AA> Could you try my two trivial benchmarks I sent on lkml too?

I just got around to running your numa01 test on mainline, autonuma, and
numasched.  This is on a 2-socket, 6-cores-per-socket,
2-threads-per-core machine, with your test configured to run 24
threads. I also ran Peter's modified stream_d on all three as well, with
24 instances in parallel. I know it's already been pointed out that it's
not the ideal or end-all benchmark, but I figured it was still
worthwhile to see if the trend continued.

On your numa01 test:

  Autonuma is 22% faster than mainline
  Numasched is 42% faster than mainline

On Peter's modified stream_d test:

  Autonuma is 35% *slower* than mainline
  Numasched is 55% faster than mainline

I know that the "real" performance guys here are going to be posting
some numbers from more interesting benchmarks soon, but since nobody
had answered Andrea's question, I figured I'd do it.

-- 
Dan Smith
IBM Linux Technology Center

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