[ofw] ***SPAM*** error between Linux and Windows 2003

[Fab Tillier]

Actually, that's not quite true.  If you use an app that uses the RDMA CM then Stan is correct, due to there not being an RDMA CM in the Windows stack.  However if an app is using the IB CM directly, things will interop just fine if the application keeps its wire protocol the same.

-Fab

From: ofw-bounces at lists.openfabrics.org [mailto:ofw-bounces at lists.openfabrics.org] On Behalf Of Smith, Stan
Sent: Monday, March 31, 2008 10:25 AM
To: Ben Shapiro; ofw at lists.openfabrics.org
Subject: RE: [ofw] ***SPAM*** error between Linux and Windows 2003

Plain and simple - Linux and Windows can not successfully communicate over IB QPs unless you are using the DAPL socket CM provider.
The problem is differences in the CM wire protocols between Linux & Windows; specifically format and handling of private data.

If your application were to exchange QP information over sockets and both sides set identical QP attributes, and transitioned QP states manually (all of what a CM does), then you can communicate Linux to Windows over IB QPs. Not a recommended approach, highly prone to errors.

This problem is being addressed by Sean Hefty as he is migrating a variant of Linux rdma_cm into the Windows IB stack.
The work is ongoing and not scheduled to be ready until Aug/Sept. time frame.

stan.

________________________________
From: ofw-bounces at lists.openfabrics.org [mailto:ofw-bounces at lists.openfabrics.org] On Behalf Of Ben Shapiro
Sent: Monday, March 31, 2008 5:58 AM
To: ofw at lists.openfabrics.org
Subject: [ofw] ***SPAM*** error between Linux and Windows 2003
Has anyone run into  this problem before:

> I was attempting to do some Infiniband testing between a Windows 2003
> server and a SLES10 box using ib_send_bw. I got some error
> messages/statuses. Is there any documentation out there where I could
> look up the error messages?
>
> I tried it both ways and here are the error message I got (not sure
> which was which way):
>
> Completion wth error at client:
>
> Failed status 12: wr_id 1 syndrom 0x81 Scnt=300 ccnt=0
>
> Completion wth error at client:
>
> Failed status 9: wr_id 1 syndrom 0x81
> Scnt=1000 ccnt=0
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