[Sidefx-houdini-list] VEX SOP threading

Olex P hoknamahn at gmail.com
Fri Jul 18 09:21:15 EDT 2008


I've seen wrong results for _some_ SOPs.

On Thu, Jul 17, 2008 at 3:28 PM, P. Alex Lim <list at poh-yee.com> wrote:

> Hi Peter, Hi Simons,
>
> Thank you for the heads up on the possible issue with other operations
> such as the point cloud! :) Much appreciated! This will save me some
> headaches! :)
>
> Take care,
> Alex
>
>
> Simon Kapeniak wrote:
> > I can confirm that operations on point clouds make troubles for threading
> > (what is apparently mentioned in Help). Besides those cases VEX works for
> me
> > fine in MT mode.
> >
> > 2008/7/17 Simon Barrick <simon at primalpictures.com>:
> >
> >
> >> I've seen problems using point clouds but not other things, why not just
> >> try and see? If the result is the same as one thread then you're good to
> >> go.
> >>
> >> -----Original Message-----
> >> From: sidefx-houdini-list-bounces at sidefx.com
> >> [mailto:sidefx-houdini-list-bounces at sidefx.com] On Behalf Of Peter
> >> Bowmar
> >> Sent: 17 July 2008 05:04
> >> To: sidefx-houdini-list at sidefx.com
> >> Subject: Re: [Sidefx-houdini-list] VEX SOP threading
> >>
> >> Hey Alex,
> >>
> >> I've seen trouble with VEX SOP Threading as recently as 9.1 (incorrect
> >> results) so I'd urge caution on that...
> >>
> >> Cheers,
> >>
> >> Peter B
> >>
> >> 2008/7/16 P. Alex Lim <list at poh-yee.com>:
> >>
> >>> Hi everyone.
> >>>
> >>> Is the threading in VEX SOP pretty safe to use these days? I have a
> >>> large set of data where without threading took about 490-550ms to
> >>> process. After I changed the option to "1 per processor" or "4
> >>> threads", the processing time dropped to ~250ms. Pretty cool.
> >>>
> >>> Anyways, had to ask because I seemed to still had it in mind from long
> >>>
> >>> long time ago to not change this or I'd be asking for trouble...
> >>>
> >>> Much thanks!
> >>> Alex
> >>>
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> >>>
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