[concurrency-interest] Matrix multiply with parallelized inner product

Hanson Char hanson.char at gmail.com
Mon Feb 4 01:01:08 EST 2008


Hi Tim,

In the wiki example "Matrix multiply with parallelized inner product"

  http://artisans-serverintellect-com.si-eioswww6.com/default.asp?W42

"It is much, much slower than the version that just parallelizes the
outer loop."

Did you know this as a fact prior to benchmarking ?  Does this mean
too much parallelism via PA would result in slower performance ?  If
so, any guideline/recipe as to what extent should one go about using
PA without causing such slowdown (besides trial-and-error) ?

Regards,
Hanson


More information about the Concurrency-interest mailing list