[Webkit-unassigned] [Bug 43903] Speeding up SVG filters with multicore (SMP) support

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=43903





--- Comment #39 from Zoltan Herczeg <zherczeg at webkit.org>  2011-04-07 11:52:08 PST ---
(In reply to comment #38)
> What I'm saying is that libdispatch changes the number of threads dynamically. It's not determined at the time tasks are scheduled.

I understand that, still I don't see a problem here. Basically even with libdispatch, you need to create those small tasks, isn't it? And their number is fixed when you created them, and they were executed somehow (doesn't matter how).

http://developer.apple.com/library/mac/#documentation/General/Conceptual/ConcurrencyProgrammingGuide/ConcurrencyandApplicationDesign/ConcurrencyandApplicationDesign.html#//apple_ref/doc/uid/TP40008091-CH100-SW1

Even with libdispatch, you determine the number of sub-tasks (since you create them), and their number is never infinte. Thus, the ParrallelJobs returns the number you passed as maxThreads, you create those sub-tasks, and libdispatch execute them.

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