| Re: [AD] user-defined events |
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On Friday 17 October 2008, Peter Wang wrote:
> On 2008-10-17, Thomas Fjellstrom <tfjellstrom@xxxxxxxxxx> wrote:
> > On Friday 17 October 2008, Peter Wang wrote:
> > > That's the whole point of using atomic ops. Although it's true I
> > > haven't stress tested it on a multi-core machine yet (or at all).
> >
> > Not entirely. The main point is to lock stuff between processes and
> > threads afaik. So nothing can happen between the separate events. having
> > more than one cpu changes things a bit, now multiple things CAN happen at
> > once, each cpu can even call one of those functions at the same time. Are
> > those asm ops system global locks? or just cpu local?
>
> Please see http://en.wikipedia.org/wiki/Atomic_operations
> and http://en.wikipedia.org/wiki/Fetch-and-add
Good good. Though the x86 platform doesn't have "perfect" actual atomic ops.
At least from what I've heard. But Its probably not important.
> Peter
>
>
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--
Thomas Fjellstrom
tfjellstrom@xxxxxxxxxx