[ewg] RDS problematic on RC2

[Richard Frank]

<<
If the TCP part is entirely non-working, it might be better
to disable it for now rather than have it crash the machine.
So far, I have never gotten it to function correctly and it
crashes some machines almost immediately.
>>

My vote is to disable TCP support (return not supported) - at least for now - and possibly remove this support. Even when it is running the performance we see precludes its use.
 







Johann George wrote:
>> That's a remote invalid request error. Were you testing
>> with RDMA or without?
>>     
>
> We were using the version that runs over IB.
>
>   
>> What user application were you using for testing?
>>     
>
> qperf.  Unfortunately the version that is included in OFED
> 1.3 RC2 is old due to a problem that Vlad just discovered
> yesterday.  We hope to have that fixed shortly and the
> updated version will be part of the nightly builds.  In the
> meantime, you can download it from the repository and build
> it:
>
>     git clone git://git.openfabrics.org/~johann/qperf
>     cd qperf
>     ./autogen.sh
>     ./configure
>     make
>
> To run it, on one machine (the server), run it with no
> arguments.  On the other machine, run:
>
>     qperf server_nodename rds_bw
>
> where server_nodename is replaced by the hostname of the
> server.  This test gives bandwidth statistics for RDS.  It
> worked well with RC1 but fails with RC2.
>
>   
>> Yes, the TCP part of RDS isn't being looked after very much,
>> unfortunately.
>>     
>
> If the TCP part is entirely non-working, it might be better
> to disable it for now rather than have it crash the machine.
> So far, I have never gotten it to function correctly and it
> crashes some machines almost immediately.
>
> If it is helpful, we may be able to set up a VPN so you can
> log onto the machines and experience the problem with the
> RDMA version and the crash with TCP.
>
> Johann
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