[ofa-general] Re: minutes from socket over RDMA discussion at workshop

Michael S. Tsirkin mst at dev.mellanox.co.il
Wed May 2 13:23:17 PDT 2007


> Quoting Rick Jones <rick.jones2 at hp.com>:
> Subject: Re: minutes from socket over RDMA discussion at workshop
> 
> Michael S. Tsirkin wrote:
> >>Quoting Rick Jones <rick.jones2 at hp.com>:
> >>Subject: Re: minutes from socket over RDMA discussion at workshop
> >>
> >>
> >>>>The OFED is whatever is in RHEL5 - someone said that might be 1.1.
> >>>
> >>>
> >>>So you are not comparing apples to apples:
> >>>SPD uses buffers of 64K, IPoIB datagram mode - 2K.
> >>
> >>I won't dispute that, I'll just say it is what people running RHEL5 will 
> >>see out of the box.
> >
> >
> >OK but when some people say "IPoIB gives same BW as SDP" they mean 1.2.
> 
> Fair enough.  The joy of moving targets :)
> 
> >>>Report the problem, people'll try to help.
> >>
> >>I thought I had, albeit perhaps too tangentially.  Anyway, I'm running on 
> >>a Debian 4.0 with a 2.6.21.1 kernel on it (from a kernel.org tar) now and 
> >>will try a contemporary 1.2 on that.  It seems there is already some OFED 
> >>stuff in the 2.6.21.1 kernel, so if there are suggestions on how to 
> >>remove that for a successful 1.2 install, or other suggestions on how to 
> >>have a successful 1.2 install on 2.6.21.1 I'm all ears.  When it comes to 
> >>manipulating bits here I'm still on the very steep part of the learning 
> >>curve.
> >
> >
> >OFED should really do that for you automatically,
> >and will even try to put it all back on uninstall.
> 
> I'll likely be trying later this afternoon (US Pacific time).

I'm afraid I'm going offline now.

-- 
MST



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