[ewg] Re: [ofa-general] RE: Agenda for the OFED meeting today (Jan 5, 09)
jsquyres at cisco.com
Mon Jan 5 08:39:03 PST 2009
Would all MPI processes need to query the SM for each path that they
want to use in a QP?
On Jan 5, 2009, at 11:31 AM, John Russo wrote:
> Another suggestion for 1.5
> Implementation of SA queries for Path Records (using IBTA 1.2.1
> ServiceId field) in all OFED ULPs, especially for MPI
> The IBTA standard defines that the proper way to
> establish a connection is to get a PathRecord from the SM/SA and use
> it to define all the attributes of the communication path.
> Ideally the IBTA CM should then be used to establish the connection
> and QPs as well.
> At present, openmpi, mvapich1 and mvapich2 do not use PathRecords,
> but instead hard code attributes like the PKey, SL, etc.
> In some cases these hardcoded values can be overridden by
> configurable values such as PKey and SL, but such values must be
> uniform across all connections and must be provided per job (which
> can be error prone/tedious).
> At present opensm supports PKeys and SLs, however MPI
> cannot easily use these features.
> Other features, such as lash routing, in opensm do not work properly
> with MPI because the SL must be uniform across all connections, but
> for lash it will vary per route.
> Additionally, applications which do not use PathRecords will have
> difficulties with advanced features like IB routing, partitioning,
> etc. All of which are available or being worked on in opensm.
> From: ewg-bounces at lists.openfabrics.org [mailto:ewg-bounces at lists.openfabrics.org
> ] On Behalf Of Tziporet Koren
> Sent: Monday, January 05, 2009 1:00 AM
> To: ewg at lists.openfabrics.org
> Cc: general at lists.openfabrics.org
> Subject: [ewg] Agenda for the OFED meeting today (Jan 5, 09)
> Hello all,
> I hope we all had nice holidays and vacations, and now it’s the time
> to get back to business.
> Agenda for OFED meeting today:
> 1. Conclusions from OFED 1.4 release: Open discussion
> 2. Do we wish to have OFED 1.4.: Please send pros & cons before the
> 3. OFED 1.5: Schedule and features.
> This is what we presented in SC08 about 1.5:
> Preliminary Schedule:
> • Feature Freeze: 3/20/09
> • Alpha Release: 3/20/09
> • Beta Release: 4/20/09
> • RC1: 5/5/09
> • RC2-RCx: About every 2 weeks as needed
> • Release: June 2009
> • Kernel.org: 2.6.28 and 2.6.29
> • Multiple Event Queues to support Multi-core CPUs
> • NFS/RDMA – GA
> • RDS support for iWARP
> • OpenMPI 1.3
> • Add support/backports for RedHat EL 5.3 and EL 4.8, SLES 11
> • Support for Mellanox vNIC (EoIB) and FCoIB with BridgeX device
> • more TBD…
> We also presented the OS matrix but I suggest we will close this in
> the next meeting.
> My proposal:
> • Have the release in July and not June - so we will have more time
> for development
> • Stick to one kernel version base and not change in the middle
> since we saw that changing the kernel base caused a delay.
> We need to decide in the meeting if it is 2.6.29 or we should wait
> for 2.6.30.
> • Add IB over Eth - this is similar to iWARP but more like IB (e.g.
> including UD), and can work over ConnectX.
> Please send your suggestions to the list before the meeting if
> general mailing list
> general at lists.openfabrics.org
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