Re: [Caml-list] OC4MC : OCaml for Multicore architectures

[kcheung@math.carleton.ca]

> On Thursday 24 September 2009 01:01:58 you wrote:

> No problem. I'll be happy to get anything working!
>
> Following your advice, it seems to work perfectly now:

I'm not too familiar with concurrency in ocaml.
How does OC4MC compare with JoCaml?

>
> $ ./matmul.th 500 1
> Temp de calcul: utime 2.324145, stime 0.020001, rtime 2.325608
> $ ./matmul.th 500 2
> Temp de calcul: utime 1.780111, stime 0.000000, rtime 0.890797
> $ ./matmul.th 500 3
> Temp de calcul: utime 1.784111, stime 0.004000, rtime 0.608895
> $ ./matmul.th 500 4
> Temp de calcul: utime 1.764110, stime 0.004000, rtime 0.451214
> $ ./matmul.th 500 5
> Temp de calcul: utime 1.768111, stime 0.000000, rtime 0.393285
> $ ./matmul.th 500 6
> Temp de calcul: utime 1.924120, stime 0.004001, rtime 0.333215
> $ ./matmul.th 500 7
> Temp de calcul: utime 1.788112, stime 0.000000, rtime 0.302328
> $ ./matmul.th 500 8
> Temp de calcul: utime 1.992124, stime 0.000000, rtime 0.290383
>
> Wow! 2.6x faster on 2 cores is good. ;-)
>
> That's a really fantastic piece of work. I'll do my best to study it and
> write
> literature about it. May I ask, can you give a rough overview of the
> design?
> For example, is there a separate nursery per thread so each thread can
> allocate a certain amount before incurring a global pause? Do you have any
> ideas for libraries built on top of this, such as a task parallel library
> using work-stealing deques?
>
> Thanks very much!!!
>
> --
> Dr Jon Harrop, Flying Frog Consultancy Ltd.
> http://www.ffconsultancy.com/?e
>
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