[ofa-general] GPFS node loses IB-connection
SEGERS Koen
Koen.SEGERS at VRT.BE
Wed May 23 08:39:06 PDT 2007
What value would you recommend then?
Koen
-----Oorspronkelijk bericht-----
Van: Scott Weitzenkamp (sweitzen) [mailto:sweitzen at cisco.com]
Verzonden: woensdag 23 mei 2007 17:38
Aan: SEGERS Koen; Hal Rosenstock
CC: Clive Hall (clivhall); general-bounces at lists.openfabrics.org;
general at lists.openfabrics.org
Onderwerp: RE: [ofa-general] GPFS node loses IB-connection
The boot time of the host doesn't matter for this timeout. While the
host is booting, the IB link is down anyway.
Scott
> -----Original Message-----
> From: SEGERS Koen [mailto:Koen.SEGERS at VRT.BE]
> Sent: Wednesday, May 23, 2007 8:20 AM
> To: Hal Rosenstock; Scott Weitzenkamp (sweitzen)
> Cc: Clive Hall (clivhall);
> general-bounces at lists.openfabrics.org; general at lists.openfabrics.org
> Subject: RE: [ofa-general] GPFS node loses IB-connection
>
> After a whole day of stresstesting with the MAD renicing turned on, we
> got the error once. So I think I should raise the timeout on
> the switch
> also.
>
> It takes about 2 minutes to boot the system. Do you agree
> that this is a
> good value for the timeout?
>
> Scott,
> Can you explain me the problem of the memlock?
>
> I saw that the SLES10 bug is only an issue in MVAPICH. Since we didn't
> install this, the bug is not related to us. This is correct, isn't it?
>
> Greetz
>
> Koen
>
> -----Oorspronkelijk bericht-----
> Van: Hal Rosenstock [mailto:halr at voltaire.com]
> Verzonden: woensdag 23 mei 2007 16:12
> Aan: Scott "Weitzenkamp (sweitzen)
> CC: SEGERS Koen; Clive Hall (clivhall);
> general-bounces at lists.openfabrics.org; general at lists.openfabrics.org
> Onderwerp: RE: [ofa-general] GPFS node loses IB-connection
>
> On Wed, 2007-05-23 at 09:51, Scott Weitzenkamp (sweitzen) wrote:
> > No C code changes, just a few config file changes (RENICE_IB_MAD=yes
> in
> > openib.conf,
>
> Does the host really not respond to MAD requests for over 10
> seconds in
> some cases ?
>
> -- Hal
>
> > memlock in /etc/security/limits.conf, fix /etc/hosts on
> > SLES10 for bug 267, etc.).
> >
> > Scott Weitzenkamp
> > SQA and Release Manager
> > Server Virtualization Business Unit
> > Cisco Systems
> >
> >
> > > -----Original Message-----
> > > From: SEGERS Koen [mailto:Koen.SEGERS at VRT.BE]
> > > Sent: Wednesday, May 23, 2007 6:48 AM
> > > To: Scott Weitzenkamp (sweitzen); Clive Hall (clivhall)
> > > Cc: Shirley Ma; Ami Perlmutter;
> > > general at lists.openfabrics.org;
> general-bounces at lists.openfabrics.org
> > > Subject: RE: [ofa-general] GPFS node loses IB-connection
> > >
> > > This far, all tests seem to work.
> > >
> > > Thanks for the help!
> > >
> > > Scott,
> > > Are there more bugfixes that cisco does in its rpms?
> > >
> > > Greetz
> > >
> > > Koen
> > >
> > > -----Oorspronkelijk bericht-----
> > > Van: Scott Weitzenkamp (sweitzen) [mailto:sweitzen at cisco.com]
> > > Verzonden: woensdag 23 mei 2007 0:39
> > > Aan: SEGERS Koen; Scott Weitzenkamp (sweitzen); Clive Hall
> (clivhall)
> > > CC: Shirley Ma; Ami Perlmutter; general at lists.openfabrics.org;
> > > general-bounces at lists.openfabrics.org
> > > Onderwerp: RE: [ofa-general] GPFS node loses IB-connection
> > >
> > > It's not so much pinging every 10 seconds as expecting a
> > > response within
> > > 10 seconds (Clive, correct me if I'm wrong).
> > >
> > > You only need to do 1) or 2), not both. Cisco configures 1)
> > > in the OFED
> > > binary RPMs we release at
> > > http://www.cisco.com/cgi-bin/tablebuild.pl/sfs-linux. I
> > > prefer to have
> > > the host be more responsive.
> > >
> > >
> > > Scott Weitzenkamp
> > > SQA and Release Manager
> > > Server Virtualization Business Unit
> > > Cisco Systems
> > >
> > >
> > > > -----Original Message-----
> > > > From: Koen Segers [mailto:koen.segers at VRT.BE]
> > > > Sent: Tuesday, May 22, 2007 3:35 PM
> > > > To: Scott Weitzenkamp (sweitzen)
> > > > Cc: Shirley Ma; Ami Perlmutter;
> > > > general at lists.openfabrics.org;
> general-bounces at lists.openfabrics.org
> > > > Subject: RE: [ofa-general] GPFS node loses IB-connection
> > > >
> > > > If I understand it wright, the switch is actually polling
> > > > (=pinging) the
> > > > interfaces every 10s. This means that when the interface is
> handling
> > > > other traffic, the poll can fail and the port could be
> > > > considered out of
> > > > service. My question is then: "How can the timeout be reached
> while
> > > > packets are being sent/received to/from the interface?"
> > > >
> > > > Anyway, what timeout-value would you recommend for us? And why?
> > > >
> > > > To recapitulate: these are the actions I'll take tomorrow
> > > > 1) change the MAD niceness of the servers
> > > > 2) change the timeout on the switches
> > > >
> > > > Are these changes sufficient for the HCA's to keep
> their ports in
> > > > PORT_ACTIVE state?
> > > >
> > > > Regards,
> > > >
> > > > Koen
> > > >
> > > > On Tue, 2007-05-22 at 12:59 -0700, Scott Weitzenkamp
> > > (sweitzen) wrote:
> > > > > Yes, you can tune it. Here's an example via the switch CLI:
> > > > >
> > > > > SFS-7000D(config)# ib sm subnet-prefix fe:80:00:00:00:00:00:00
> > > > > node-timeout <value>
> > > > >
> > > > > The default is 10 seconds, it can be configured up to
> > > 2000 seconds.
> > > > > If a HCA is completely unresponsive for longer than the
> > > node-timeout
> > > > > value, then we consider that HCA out of service.
> > > > >
> > > > > Scott Weitzenkamp
> > > > > SQA and Release Manager
> > > > > Server Virtualization Business Unit
> > > > > Cisco Systems
> > > > >
> > > > >
> > > > >
> > > > >
> > > > ______________________________________________________________
> > > > > From: Shirley Ma [mailto:xma at us.ibm.com]
> > > > > Sent: Tuesday, May 22, 2007 11:30 AM
> > > > > To: koen.segers at VRT.BE
> > > > > Cc: Ami Perlmutter; general at lists.openfabrics.org;
> > > > > general-bounces at lists.openfabrics.org; Scott
> Weitzenkamp
> > > > > (sweitzen)
> > > > > Subject: RE: [ofa-general] GPFS node loses
> IB-connection
> > > > >
> > > > >
> > > > >
> > > > > Koen,
> > > > >
> > > > > So it is most likely you hit the same bug as
> 229 (Scott
> > > > > pointed out earlier). The same workaround might
> > > work for you
> > > > > by renicing ib_mad as Scott suggested.
> > > > >
> > > > > I think this should be a SM query timeout
> tunable value
> in
> > > > > Cisco SM. Am I right, Scott?
> > > > >
> > > > > Thanks
> > > > > Shirley Ma
> > > > >
> > > > >
> > > > > Inactive hide details for Koen Segers
> > > > <koen.segers at VRT.BE>Koen
> > > > > Segers <koen.segers at VRT.BE>
> > > > >
> > > > >
> > > > > Koen Segers
> > > > <koen.segers at VRT.BE>
> > > > >
> > > > > 05/22/07 11:14 AM
> > > > > Please respond to
> > > > > koen.segers at VRT.BE
> > > > >
> > > > >
> > > > > To
> > > > >
> > > > > Shirley
> > > > > Ma/Beaverton/IBM at IBMUS
> > > > >
> > > > > cc
> > > > >
> > > > > Ami Perlmutter
> > > > > <amip at dev.mellanox.co.il>,
> > > > general at lists.openfabrics.org,
> general-bounces at lists.openfabrics.org
> > > > >
> > > > > Subject
> > > > >
> > > > > RE:
> > > > > [ofa-general]
> > > > > GPFS node loses
> > > > > IB-connection
> > > > >
> > > > >
> > > > >
> > > > > Hi,
> > > > >
> > > > > It is the Cisco SM.
> > > > >
> > > > > SFS-7000P> show version
> > > > >
> > > > >
> > > > >
> > > > ==============================================================
> > > > ==================
> > > > > System Version Information
> > > > >
> > > > ==============================================================
> > > > ==================
> > > > > system-version : SFS-7000P TopspinOS
> > > 2.9.0 releng
> > > > > #147
> > > > > 10/25/2006 02:01:32
> > > > > contact : tac at cisco.com
> > > > > name : SFS-7000P
> > > > > location : 170 West Tasman Drive,
> > > > San Jose, CA
> > > > > 95134
> > > > > up-time : 11(d):7(h):49(m):3(s)
> > > > > last-change : none
> > > > > last-config-save : none
> > > > > action : none
> > > > > result : none
> > > > > oper-mode : normal
> > > > >
> > > > > There is also a command that gives the SM version,
> > > > but I can't
> > > > > find it
> > > > > right now.
> > > > >
> > > > > On Tue, 2007-05-22 at 09:45 -0700, Shirley Ma wrote:
> > > > > > Hello Koen,
> > > > > >
> > > > > > From the switch log, it looks a SM issue to me.
> > > > The node was
> > > > > kicked
> > > > > > out of the membership. Which SM you are
> using in your
> > > > > fabric?
> > > > > >
> > > > > > Thanks
> > > > > > Shirley Ma
> > > > > >
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