[Sidefx-houdini-list] VEX SOP threading

Frederic Servant frederic.servant at gmail.com
Thu Jul 31 06:49:40 EDT 2008


I concur that I've run into some issues with VEX SOP with multithreading on
9.1, and not only with pointclouds.

It's too bad because it's super-fast when it does work.

Cheers,
--
Frederic Servant
R&D Engineer
la maison
www.alamaison.fr


On Fri, Jul 18, 2008 at 3:21 PM, Olex P <hoknamahn at gmail.com> wrote:

> 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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