[openib-general] Re: PATCH] enhancement to rdma_bw and rdma_lat toutilize the RDMA CM

[Sagi Rotem]

If we will have a patch just to the pp routine as MST suggested it would
be nice , I could apply it to all other performance tests.
Sagi 

-----Original Message-----
From: openib-general-bounces at openib.org
[mailto:openib-general-bounces at openib.org] On Behalf Of Michael S.
Tsirkin
Sent: Tuesday, May 16, 2006 5:58 PM
To: Steve Wise
Cc: openib-general
Subject: [openib-general] Re: PATCH] enhancement to rdma_bw and rdma_lat
toutilize the RDMA CM

Quoting r. Steve Wise <swise at opengridcomputing.com>:
> Subject: Re: PATCH] enhancement to rdma_bw and rdma_lat to utilize the

> RDMA CM
> 
> On Tue, 2006-05-16 at 17:41 +0300, Michael S. Tsirkin wrote:
> > Quoting r. Steve Wise <swise at opengridcomputing.com>:
> > > Subject: PATCH] enhancement to rdma_bw and rdma_lat to utilize the

> > > RDMA CM
> > > 
> > > I don't know who maintains src/userspace/perftest, but here is a 
> > > patch set that enables rdma_bw and rdma_lat to use the RDMA_CM 
> > > with the addition of the -c or --cma flag.
> > > 
> > 
> > I'm worried that this makes the program too big. Maybe this should 
> > be another test rather than an option?
> > 
> 
> ok.  You want it as a separate pair of programs?

I guess we'll see once there's the minimum patch that only affects the
connection setup.  If the changes can be localised to just the pp
routines, then I think it still fits as part of the same test.

> > > The rkey/addr info is exchanged in the private data, and 
> > > SEND/RECV's are used to sync the client/server before and after
execution.
> > 
> > Do we really need SEND/RECV messages for this?
> > I think I get completion with error once the remote side has
disconnected. No?
> > 
> 
> perhaps.  I just thought it was cleaner to synch up at the end.  Just 
> like the non-cma version does over the TCP socket (see
> pp_client_exch_dest() / pp_server_exch_dest() at the end of the test).

Yes, using pp_client_exch_dest/pp_server_exch_dest now looks like not a
good idea. Need to think back to why do we need this at all.

--
MST
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