[ewg] Re: [ofa-general] RE: Agenda for the OFED meeting today (Jan 5, 09)

[Jeff Squyres]

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  
> meeting
>
> 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
> Features:
>
> 	• 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  
> possible
>
> Tziporet
>
>
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-- 
Jeff Squyres
Cisco Systems