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xen-devel
Re: [Xen-devel] Poor HVM performance with 8 vcpus
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To: |
George Dunlap <George.Dunlap@xxxxxxxxxxxxx> |
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Subject: |
Re: [Xen-devel] Poor HVM performance with 8 vcpus |
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From: |
Juergen Gross <juergen.gross@xxxxxxxxxxxxxx> |
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Date: |
Wed, 07 Oct 2009 13:45:27 +0200 |
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Cc: |
Ian Pratt <Ian.Pratt@xxxxxxxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>, Tim Deegan <Tim.Deegan@xxxxxxxxxx>, James Harper <james.harper@xxxxxxxxxxxxxxxx> |
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Wed, 07 Oct 2009 04:45:54 -0700 |
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v=1; a=rsa-sha256; c=simple/simple; d=ts.fujitsu.com; i=juergen.gross@xxxxxxxxxxxxxx; q=dns/txt; s=s1536b; t=1254915960; x=1286451960; h=from:sender:reply-to:subject:date:message-id:to:cc: mime-version:content-transfer-encoding:content-id: content-description:resent-date:resent-from:resent-sender: resent-to:resent-cc:resent-message-id:in-reply-to: references:list-id:list-help:list-unsubscribe: list-subscribe:list-post:list-owner:list-archive; z=From:=20Juergen=20Gross=20<juergen.gross@xxxxxxxxxxxxxx> |Subject:=20Re:=20[Xen-devel]=20Poor=20HVM=20performance =20with=208=20vcpus|Date:=20Wed,=2007=20Oct=202009=2013:4 5:27=20+0200|Message-ID:=20<4ACC7F57.2040702@xxxxxxxxxxxx om>|To:=20George=20Dunlap=20<George.Dunlap@xxxxxxxxxxxxx> |CC:=20"xen-devel@xxxxxxxxxxxxxxxxxxx"=20<xen-devel@lists .xensource.com>,=20=0D=0A=20Ian=20Pratt=20<Ian.Pratt@xxxx itrix.com>,=0D=0A=20James=20Harper=20<james.harper@bendig oit.com.au>,=20=0D=0A=20Tim=20Deegan=20<Tim.Deegan@citrix .com>|MIME-Version:=201.0|Content-Transfer-Encoding:=207b it|In-Reply-To:=20<de76405a0910070311q6c879be0wd4f33d8108 235d8b@xxxxxxxxxxxxxx>|References:=20<4ACC3B49.4060500@ts .fujitsu.com>=09<4FA716B1526C7C4DB0375C6DADBC4EA342A68E5C 92@xxxxxxxxxxxxxxxxxxxxxxxxx>=09<AEC6C66638C05B468B556EA5 48C1A77D0177D81F@trantor>=09<20091007091254.GA20579@whitb y.uk.xensource.com>=09<4ACC6219.4010305@xxxxxxxxxxxxxx> =20<de76405a0910070311q6c879be0wd4f33d8108235d8b@xxxxxxxx il.com>; bh=EcbuSviQHxf8AaE1uqBijBxjtj0rMVwhOxRGarrBNXk=; b=AJ+dLdQa/555uq2dKWlkz79z3AHayIzOeBTbyBiaZOJV+zJtVAwNPFDC xkBXyS0w1MdClQT50NQ+veYCpy+ZvY+0pYIDSTH3zhrnB9vcQZH7Wb35g uc0kGYv5vrCY4KwmX9Qn9p2hXc5P8X1ftflaXBtQPSLKjEydxH73IfNRz 9MGoUyf5nvS49+KzKzUVlnm/rCCQkOPtebUddjrbyaQ+hh7P/WPKrNrdC 6NE9dZbIceoaSIWM0XFxjF38kzoSg; |
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George Dunlap wrote:
> Jeurgen,
>
> I think this problem is a good candidate for xentrace/xenalyze. If
> you take a 30-second trace (xentrace -D -e all -T 30
> /tmp/[traceid].trace) while the benchmark is at its heaviest, and then
> analyze it using xenalyze
> (http://xenbits.xensource.com/ext/xenalyze.hg), it should show up
> whether the shadow performance is due to brute-force search or
> something else.
>
> If you're using 3.3, you'll have to apply the back-patch to xenalyze
> to make it work properly.
Patches don't apply cleanly, build fails with error even without patches due
to incorrect format strings.
Juergen
--
Juergen Gross Principal Developer Operating Systems
TSP ES&S SWE OS6 Telephone: +49 (0) 89 636 47950
Fujitsu Technolgy Solutions e-mail: juergen.gross@xxxxxxxxxxxxxx
Otto-Hahn-Ring 6 Internet: ts.fujitsu.com
D-81739 Muenchen Company details: ts.fujitsu.com/imprint.html
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