[phobos] std.parallelism: Request for review/comment

[Lars Tandle Kyllingstad]

I ran my calculation on an 8-core at work, by the way, and it was very enjoyable to see a manyfold speed-up just by changing a few lines of code.

We should definitely get this into Phobos.

-Lars

----- Reply message -----
From: "David Simcha" <dsimcha at gmail.com>
Date: Tue, Aug 31, 2010 14:13
Subject: [phobos] std.parallelism:  Request for review/comment
To: "Discuss the phobos library for D" <phobos at puremagic.com>

  On 8/31/2010 6:22 AM, Lars Tandle Kyllingstad wrote:
> Point (3) is pretty cool.  I just used your module for my current
> project at work, and the ability to get the index made the code a lot
> nicer.
>
> Another question:  Why have you chosen the default number of work units
> to be just two units per thread?  In my experience, it's not uncommon
> that calculations are harder on some parts of the range than others, and
> then there is a risk of some cores running out of work to do.  I'd think
> that having more work units, 3-4 per thread, say, would allow for better
> distribution of work between cores.
>
> -Lars

Good point.  I should probably change this, as the more I think about it 
the more I realize that I never use the default for the reason you 
mention.  It seemed like a good idea in iteration 1, and then I just 
never reconsidered.
_______________________________________________
phobos mailing list
phobos at puremagic.com
http://lists.puremagic.com/mailman/listinfo/phobos
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.puremagic.com/pipermail/phobos/attachments/20100831/66eaafd6/attachment.html>