On Aug 13, 2007, at 11:28 AM, Pavel Shamis (Pasha) wrote:
> Jeff Squyres wrote:
>> I guess reading the graph that Pasha sent is difficult; Pasha -- can
>> you send the actual numbers?
> Ok here is the numbers on my machines:
> 0 bytes
> mvapich with header caching: 1.56
> mvapich without header caching: 1.79
> ompi 1.2: 1.59
> So on zero bytes ompi not so bad. Also we can see that header caching
> decrease the mvapich latency on 0.23
> 1 bytes
> mvapich with header caching: 1.58
> mvapich without header caching: 1.83
> ompi 1.2: 1.73
> And here ompi make some latency jump.
> In mvapich the header caching decrease the header size from 56bytes to
> What is the header size (pml + btl) in ompi ?
The match header size is 16 bytes, so it looks like ours is already
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