Thanks a lot for your reply.
Thanks and Regards
Sparsh Mittal
On Tue, Feb 12, 2013 at 4:53 PM, David P Grove <gro...@us.ibm.com> wrote:
> Sparsh Mittal <sparsh0mit...@gmail.com> wrote on 02/11/2013 03:08:09 PM:
>
> >
> > Thanks. This is really great and works well.
> >
> > I have small questions.
> > 1. So, should I set X10_NTHREADS to numberOfThreads or
> > (numberOfThreads+1) to also account for main thread?
> > 2. Can we do it through program itself, since I want to run for
> > different number of threads.
> >
> >
>
> Usually we recommend setting X10_NTHREADS so that you create 1 worker
> thread per core. Eg, if you have an 8 core machine, reasonable
> combinations are:
> X10_NPLACES=1; X10_NTHREADS=8
> X10_NPLACES=2; X10_NTHREADS=4
> X10_NPLACES=4; X10_NTHREADS=2
> X10_NPLACES=8; X10_NTHREADS=1
> (for more machines, use similar logic...8 machine with 4 cores each, one
> reasonable setting would be X10_NPLACES=16; X10_NTHREADS=2).
>
> It is possible to adjust these settings programmatically by calling
> methods of x10.lang.Runtime, but this is not recommend for normal usage (it
> might interact badly with the heuristics used by the X10 runtime to
> dynamically adjust the size of the thread pool when threads block/unblock
> to try to keep X10_NTHREADS active worker threads).
>
> --dave
>
>
>
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