[openib-general] Re: RFC: SDP plans

[Jeremy Brown]

On Tue, Feb 28, 2006 at 11:22:39AM -0800, Bryan O'Sullivan wrote:
> On Tue, 2006-02-28 at 10:22 -0800, Ralph Campbell wrote:
> > Can you refresh my memory? What problem are you talking about?
> > This thread has quite a few messages about SDP but I don't
> > remember a discussion about bugs or libsdp.
> 
> At least someone within PathScale ended up measuring IPoIB performance
> when they thought they were measuring SDP performance, even though they
> used libsdp, and they didn't notice until the numbers got some scrutiny.
> This is what I want to avoid having end users run into.
> 
> Jeremy, was it you?  Do you remember what was wrong?

Yes... as you know, you need to give

       LD_PRELOAD=/usr/lib64/libsdp.so SIMPLE_LIBSDP=1

on the command line to get SDP. My previous error was to leave out
"SIMPLE_LIBSDP=1". When I left that out, it silently failed over to
IPoIB.

Jeremy