I've been working for the MVAPICH project for around three years.
Since
this thread is discussing MVAPICH, I thought I should post to this
thread. Galen's description of MVAPICH is not accurate. MVAPICH uses
RDMA for short message to deliver performance benefits to the
applications. However, it needs to be designed properly to handle
scalability while delivering best performance. Since MVAPICH-0.9.6
(released on 6th December, 2005), MVAPICH has been supporting a new
mode
of operation which is called ADAPTIVE_RDMA_FAST_PATH (the basic
RDMA_FAST_PATH is also supported).
This new design uses RDMA for short message transfer in an intelligent
and adaptive manner. Using this mode, the memory allocation of
MVAPICH
is no longer static. Instead its dynamic. Its an implementation of
the
short message RDMA implementation for a limited set of peers (user
controllable) which Galen is suggesting. MVAPICH already supports this
feature. This also means that in the paper Galen mentions, the
comparison results in Figures 4 through 7 have to be re-evaluated to
make the paper and the results accurate.
I'm not sure how my results and description is not accurate, I was
comparing using
MVAPICH0.9.5-118 which is detailed in my experimental setup.
This was done before your release of MVAPICH-0.9.6.
I do think it is good that you have addressed these shortcomings
however and appreciate the clarification.
Thanks,
Galen
Hope this helps.
Thanks,
Sayantan.
--
http://www.cse.ohio-state.edu/~surs
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