Re: Parallelization on Dell Workstations

Tim Prince <timothyprince@xxxxxxxxxxxxx> writes:

If the processes on a single node send messages among themselves on
shared memory, and don't involve more messages to other nodes than in a
hybrid model, there is nothing to be gained in savings on
communication.

Of course. The problem was among other things that most of the
communication was not intra-node traffic.

We face similar issues in attempting to get good performance with 8-core
nodes, when performance per core is not as high as in 4-core nodes,
additional message traffic among nodes will limit cluster performance at
a smaller number of nodes.

Contention of the CPU-memory link, I presume?


Sebastian
.