From mboxrd@z Thu Jan 1 00:00:00 1970 From: Christoffer Dall Subject: Re: Dom0 crash with apache bench (ab) Date: Tue, 28 Jul 2015 17:00:50 +0200 Message-ID: References: <20150728145022.GE26623@x230.dumpdata.com> <1438095319.11600.165.camel@citrix.com> Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============6860915096488304807==" Return-path: In-Reply-To: <1438095319.11600.165.camel@citrix.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xen.org Errors-To: xen-devel-bounces@lists.xen.org To: Ian Campbell Cc: xen-devel@lists.xen.org List-Id: xen-devel@lists.xenproject.org --===============6860915096488304807== Content-Type: multipart/alternative; boundary=001a113592566e62e3051bf0bc4c --001a113592566e62e3051bf0bc4c Content-Type: text/plain; charset=UTF-8 On Tue, Jul 28, 2015 at 4:55 PM, Ian Campbell wrote: > On Tue, 2015-07-28 at 10:50 -0400, Konrad Rzeszutek Wilk wrote: > > On Tue, Jul 28, 2015 at 03:09:31PM +0200, Christoffer Dall wrote: > > > Hi, > > > > > > I've been doing some performance comparisons lately, and wanted to > > > compare > > > the performance overhead of using Xen with apache bench, but > > > unfortunately > > > the Dom0 kernel crashes when hitting it with ab from a remote machine. > > > Most other workloads seem to be stable, however, I do see similar > > > crashes > > > if hitting Dom0 mysql with a mysql benchmark with a high level of > > > parallelism. > > > > > > I use a 10G Mellanox MX354A Dual port FDR CX3 adapter for networking on > > > a > > > Dell PowerEdge R320 system with a Xeon E5-2450 and 16 GB of RAM. > > > > > > Interestingly, we had a similarly looking issue on arm64 recently, but > > > that > > > was fixed with an APM-soecific fix to the hypervisor, so I am guessing > > > this > > > is unrelated, see: > > > http://lists.xenproject.org/archives/html/xen-devel/2015 > > > -03/msg02731.html > > > and the fix: > > > > http://xenbits.xen.org/gitweb/?p=xen.git;a=commit;h=50dcb3de603927db2fd > > > 87ba09e29c817415aaa44 > > > > > > I have tried with several Linux versions, v3.13, v3.18, v4.0-rc4, and > > > v4.1, > > > same issue. I have tried with Xen 4.5-0 release, and the Ubuntu > > > packaged > > > Xen 4.4 release, same issue. > > > > > > Examples of crash: > > > http://pastebin.ubuntu.com/11953498/ > > > http://pastebin.ubuntu.com/11953443/ > > > > 4.0-rc4? > > > > Have you tried 4.1? > > According to the previous paragraph, yes he has. > > yes, I have. Just for clarify, I used 4.0-rc4 because that's a branch which contained arm64 PCI support and has been used for other measurements, so this was simply my 'working tree'. Thanks, -Christoffer --001a113592566e62e3051bf0bc4c Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable


On Tue, Jul 28, 2015 at 4:55 PM, Ian Campbell <ian.campbell@citr= ix.com> wrote:
On Tue, 2015-07-28 at 10:50 -0400, Konrad Rze= szutek Wilk wrote:
> On Tue, Jul 28, 2015 at 03:09:31PM +0200, Christoffer Dall wrote:
> > Hi,
> >
> > I've been doing some performance comparisons lately, and want= ed to
> > compare
> > the performance overhead of using Xen with apache bench, but
> > unfortunately
> > the Dom0 kernel crashes when hitting it with ab from a remote mac= hine.
> > Most other workloads seem to be stable, however, I do see similar=
> > crashes
> > if hitting Dom0 mysql with a mysql benchmark with a high level of=
> > parallelism.
> >
> > I use a 10G Mellanox MX354A Dual port FDR CX3 adapter for network= ing on
> > a
> > Dell PowerEdge R320 system with a Xeon E5-2450 and 16 GB of RAM.<= br> > >
> > Interestingly, we had a similarly looking issue on arm64 recently= , but
> > that
> > was fixed with an APM-soecific fix to the hypervisor, so I am gue= ssing
> > this
> > is unrelated, see:
> > http://lists.xenproject.org/archiv= es/html/xen-devel/2015
> > -03/msg02731.html
> > and the fix:
> > http://xenbit= s.xen.org/gitweb/?p=3Dxen.git;a=3Dcommit;h=3D50dcb3de603927db2fd
> > 87ba09e29c817415aaa44
> >
> > I have tried with several Linux versions, v3.13, v3.18, v4.0-rc4,= and
> > v4.1,
> > same issue.=C2=A0 I have tried with Xen 4.5-0 release, and the Ub= untu
> > packaged
> > Xen 4.4 release, same issue.
> >
> > Examples of crash:
> > http://pastebin.ubuntu.com/11953498/
> > http://pastebin.ubuntu.com/11953443/
>
> 4.0-rc4?
>
> Have you tried 4.1?

According to the previous paragraph, yes he has.

y= es, I have.=C2=A0 Just for clarify, I used 4.0-rc4 because that's a bra= nch which contained arm64 PCI support and has been used for other measureme= nts, so this was simply my 'working tree'.

Thanks,
-Christoffer=C2=A0
--001a113592566e62e3051bf0bc4c-- --===============6860915096488304807== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel --===============6860915096488304807==--