Mark,
Guess you're too humble ;-)
At 17:23 20.11.2008, Mark Hahn wrote:
I'm happy for you, but to me, you're stacking
the deck by comparing to a quite old CPU. you
could break out the prices directly, but comparing 3x
GPU (modern? sounds like pci-express at least)
to a current entry-level cluster node (8
core2/shanghai cores at 2.4-3.4 GHz) be more appropriate.
at the VERY least, honesty requires comparing one GPU against all the cores
in a current CPU chip. with your numbers, I
expect that would change the speedup from 117 to
around 15. still very respectable.
I compiled the serial hmm version using the
default make file (gcc -O2 -g) and ran it on an
Opetron 2220 (2.8 GHz). Then I compiled the MPI
version using Intel compiler 10.1 (icc -axS -O3),
and ran it on a not-yet-to-be-released two socket
machine using 16 MPI process. The latter ran 145x
times faster. So soon, the 15x is below 1x...
So, YMWV!
Håkon
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