[ewg] RE: SC'09 BOF - Meeting notes and Final Slides

[Sean Hefty]

>can't anyone get async modify QP today on any platform by just doing the
>operation in another thread (or thread pool)?  It seems that the
>operations themselves are heavy enough that thread dispatch, locking etc
>is going to be significant overhead.

On WinOF this is basically how things are implemented anyway.  The lower level
drivers are ports of the Linux drivers and do everything synchronously.  The
kernel uverbs equivalent just queues the modify calls to a kernel thread pool.
It's not as efficient as it could be, since it ends up adding two context
switches, but works.

I could try adding threads to the librdmacm, move the modify calls to those
threads, and see if there's any difference.

- Sean