[concurrency-interest] Matrix multiply with parallelized inner product

Tim Peierls tim at peierls.net
Mon Feb 4 19:15:14 EST 2008


On Feb 4, 2008 5:43 PM, Joe Bowbeer <joe.bowbeer at gmail.com> wrote:

> If you have a bunch of PAs using the same executor, I think the number
> of available processors is effectively reduced, and therefore the
> effectiveness of this heuristic is reduced.  It would be better to
> have each thread operate on larger chunks than to divide the work up
> into more tasks that will only have to wait for threads to become
> available.
>

How about, "Avoid nesting PA calls unless the number of processors available
dominates the parallelism opportunities in the outer level" ?

--tim
-------------- next part --------------
An HTML attachment was scrubbed...
URL: /pipermail/attachments/20080204/f47a1f82/attachment.html 


More information about the Concurrency-interest mailing list