linux-kernel - Re: [PATCH 00/33] AutoNUMA27

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Date:	Mon, 8 Oct 2012 16:34:24 -0400
From:	Rik van Riel <riel@...hat.com>
To:	Andi Kleen <andi@...stfloor.org>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Andrea Arcangeli <aarcange@...hat.com>,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Peter Zijlstra <pzijlstr@...hat.com>,
	Ingo Molnar <mingo@...e.hu>, Mel Gorman <mel@....ul.ie>,
	Hugh Dickins <hughd@...gle.com>,
	Johannes Weiner <hannes@...xchg.org>,
	Hillf Danton <dhillf@...il.com>,
	Andrew Jones <drjones@...hat.com>,
	Dan Smith <danms@...ibm.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Paul Turner <pjt@...gle.com>, Christoph Lameter <cl@...ux.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>,
	Srivatsa Vaddagiri <vatsa@...ux.vnet.ibm.com>,
	Alex Shi <alex.shi@...el.com>,
	Mauricio Faria de Oliveira <mauricfo@...ux.vnet.ibm.com>,
	Konrad@...ux.intel.com, dshaks@...hat.com
Subject: Re: [PATCH 00/33] AutoNUMA27

On Fri, 05 Oct 2012 16:14:44 -0700
Andi Kleen <andi@...stfloor.org> wrote:

> IMHO needs a performance shot-out. Run both on the same 10 workloads
> and see who wins. Just a lot of of work. Any volunteers?

Here are some preliminary results from simple benchmarks on a
4-node, 32 CPU core (4x8 core) Dell PowerEdge R910 system.

For the simple linpack streams benchmark, both sched/numa and
autonuma are within the margin of error compared to manual
tuning of task affinity.  This is a big win, since the current
upstream scheduler has regressions of 10-20% when the system
runs 4 through 16 streams processes.

For specjbb, the story is more complicated. After fixing the
obvious bugs in sched/numa, and getting some basic cpu-follows-memory
code (not yet in -tip AFAIK), Larry, Peter and I, averaged results
look like this:

baseline: 	246019
manual pinning: 285481 (+16%)
autonuma:	266626 (+8%)
sched/numa:	226540 (-8%)

This is with newer sched/numa code than what is in -tip right now.
Once Peter pushes the fixes by Larry and me into -tip, as well as
his cpu-follows-memory code, others should be able to run tests
like this as well.

Now for some other workloads, and tests on 8 node systems, etc...


Full results for the specjbb run below:

BASELINE - disabling auto numa (matches RHEL6 within 1%)

[root@...f74 SPECjbb]# cat r7_36_auto27_specjbb4_noauto.txt
spec1.txt:           throughput =     243639.70 SPECjbb2005 bops
spec2.txt:           throughput =     249186.20 SPECjbb2005 bops
spec3.txt:           throughput =     247216.72 SPECjbb2005 bops
spec4.txt:           throughput =     244035.60 SPECjbb2005 bops

Manual NUMACTL results are:

[root@...f74 SPECjbb]# more r7_36_numactl_specjbb4.txt
spec1.txt:           throughput =     291430.22 SPECjbb2005 bops
spec2.txt:           throughput =     283550.85 SPECjbb2005 bops
spec3.txt:           throughput =     284028.71 SPECjbb2005 bops
spec4.txt:           throughput =     282919.37 SPECjbb2005 bops

AUTONUMA27 - 3.6.0-0.24.autonuma27.test.x86_64
[root@...f74 SPECjbb]# more r7_36_auto27_specjbb4.txt
spec1.txt:           throughput =     261835.01 SPECjbb2005 bops
spec2.txt:           throughput =     269053.06 SPECjbb2005 bops
spec3.txt:           throughput =     261230.50 SPECjbb2005 bops
spec3.txt:           throughput =     274386.81 SPECjbb2005 bops

Tuned SCHED_NUMA from Friday 10/4/2012 with fixes from Peter, Rik and 
Larry:

[root@...f74 SPECjbb]# more r7_36_schednuma_specjbb4.txt
spec1.txt:           throughput =     222349.74 SPECjbb2005 bops
spec2.txt:           throughput =     232988.59 SPECjbb2005 bops
spec3.txt:           throughput =     223386.03 SPECjbb2005 bops
spec4.txt:           throughput =     227438.11 SPECjbb2005 bops

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