Re:How FPGAs work, and why you'll buy one (2013)
by frozenport on Thursday April 16, 2015 @02:25PM
(#9389838)
>>Eventually, however, data communication costs get too high
Looks like the program is spending too much time in 'MPI_RECV'? Clearly the same time would be spent by any other hardware device, and raw compute power wont fix this. You need a faster interconnect. Indeed, among the few fixes for this problem are complicated changes to the algorithm, such a maintaining some kind of network routing scheme, which often involves complicated logic difficult to implement on anything but a CPU.
Looks like the program is spending too much time in 'MPI_RECV'? Clearly the same time would be spent by any other hardware device, and raw compute power wont fix this. You need a faster interconnect. Indeed, among the few fixes for this problem are complicated changes to the algorithm, such a maintaining some kind of network routing scheme, which often involves complicated logic difficult to implement on anything but a CPU.