Hi<br><br>I was happy to see the 'Speeding up Parallel GROMACS' paper. I'd like to try<br>the GROMACS patch for better all-to-all, as well as the all-to-all test program referred<br>to on the paper. I can't find it on the GROMACS site.
<br><br>We've got a Cisco 6500 and when I run tcpdump during MPI runs I see a huge amount<br>of TCP lost packets with retransmits, and tcptrace confirms there are a large number of restransmits.<br>I am trying to get our network admins to test the flow control setting option on our 16-processor cluster.
<br><br>Dave<br>