[Beowulf] Setting up new benchmark
diep at xs4all.nl
Fri Jan 27 18:38:14 PST 2012
No worries - when by mid februari all components from ebay arrived
and i've setup a small cluster here
i hope to write some MPI benchmarks that do all sorts of latency
tests which i'll attach GPL header to,
and which should measure from latency to bandwidth using RDMA reads
with all cores of every node busy.
Will be interesting then to compare it all.
Maybe several over here want to benchmark.
When i first designed the latency benchmark, later on Paul Hsieh
managed to make the ideas implementation a bit more efficient.
I jumped with a random generator through the memory, Paul Hsieh had
optimized it to just jumping random.
Dieter Buerssner then wrote the test for single cpu to compare
whether it was similar to output i got - which appeared to be the case.
Setting up random pattern took very long though - then i optimized to
setup the random pattern to O ( n log n ).
The advantage of all this is that one really sees the impact with all
cores at the same time, whereas most tests use a total idle cluster
and test 1 microtiny thing.
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