From: Andreas Kinzler <ml-ak@posteo.de>
To: andrew Cooper <andrew.cooper3@citrix.com>, xen-devel@lists.xen.org
Subject: Re: serious performance regression in Xen 4.2.4 and 4.2.5
Date: Thu, 19 Feb 2015 17:24:44 +0100 [thread overview]
Message-ID: <54E60E4C.3000407@posteo.de> (raw)
In-Reply-To: <54E5C703.7080703@citrix.com>
On 19.02.2015 12:20, Andrew Cooper wrote:
>Is it perhaps
>http://xenbits.xen.org/gitweb/?p=xen.git;a=commitdiff;h=f1e0df14412ccc6933a68eda66ac5b7d89186b62
>There are a number of correctness fixes in that range which will
>adversely affect performance.
I now reverted:
http://xenbits.xen.org/gitweb/?p=xen.git;a=commit;h=f1e0df14412ccc6933a68eda66ac5b7d89186b62
http://xenbits.xen.org/gitweb/?p=xen.git;a=commit;h=644e6c5c7106d276fb750daf6e07de0034b2e76a
http://xenbits.xen.org/gitweb/?p=xen.git;a=commit;h=0fffcffeb594741d5027c8c0d05900b951f997b2
and benchmark times improve but are no longer reproducable (either 3:36 or 5:09 instead of 6:xx with untouched 4.2.4).
Xen 4.3.3/4.4.1/4.5.0 have performance nearly identical to 4.2.3.
System:
Mainboard Supermicro X9SCM-F, BIOS 2.1
Adaptec 5405, one Raid 0
Xeon E3-1230
16 GB ECC non-registered
dom0 kernel is mostly vanilla 3.10.44
VT-d is turned off in the BIOS
"linux compile" HVM has 2 vCPUs and 2000 MB RAM
Regards Andreas
next prev parent reply other threads:[~2015-02-19 16:24 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-02-19 11:08 serious performance regression in Xen 4.2.4 and 4.2.5 Andreas Kinzler
2015-02-19 11:20 ` Andrew Cooper
2015-02-19 16:24 ` Andreas Kinzler [this message]
2015-02-19 13:08 ` Malcolm Crossley
2015-02-19 14:21 ` Jan Beulich
2015-02-19 14:26 ` Malcolm Crossley
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