Peter and Deke both said thats not the case anymore and that using the hyper threads since westmer i7 came out would be just as fast. To which I said what you just said. I just wanted to verify it. In fact even in comp in the GUI 8 is faster then 16. So either Peter and Deke are wrong or Mac threading isn't on par with the other platforms.
Randy S. Little http://reel.rslittle.com http://imdb.com/name/nm2325729/ <http://www.linkedin.com/in/rslittle> On Fri, Feb 3, 2012 at 16:42, Nathan Rusch <[email protected]> wrote: > I would actually *expect* the two separate instances of 8 threads > apiece to outperform a single instance using 16, for a couple reasons: > > 1) Not everything in Nuke is multithreaded. Throwing more threads at some > things won’t get you anywhere, but throwing (effectively) two machines at > them will. > > 2) There have been test results both from within The Foundry (albeit some > time ago) and from end users reporting performance degradation when trying > to get Nuke to make full use of virtual CPUs. Single-threaded operators > notwithstanding, a performance increase using two 8-thread processes (even > though they’re technically utilizing the virtual cores) could be the result > of letting the OS kernel handle the CPU scheduling for the virtual cores > between the two processes. > > -Nathan > > > *From:* Randy Little <[email protected]> > *Sent:* Friday, February 03, 2012 4:07 PM > *To:* Nuke user discussion <[email protected]> > *Subject:* Re: [Nuke-users] Threads > > dual quad xeon 8 cores real 8 virtual. (westmers?) running 2 instances > with 8 shouldn't be faster then a single 16 especially if you take all the > extra memory and i/o thats happening since its doubled. (this just goes > back to that previous thread where they where asking to change the default > threads to include the virtual cores. > > Randy S. Little > http://reel.rslittle.com > http://imdb.com/name/nm2325729/ > > > > > On Fri, Feb 3, 2012 at 15:54, Nathan Rusch <[email protected]>wrote: > >> How many physical cores do you have? >> >> -Nathan >> >> >> *From:* Randy Little <[email protected]> >> *Sent:* Friday, February 03, 2012 3:47 PM >> *To:* Nuke user discussion <[email protected]> >> *Subject:* [Nuke-users] Threads >> >> ok after the previous conversation I did some test here. on current >> gen xeon MACS. literally I can render 2 of the same comp with interleaved >> frames significantly faster then the same comp set to 16 threads. Its not >> even close. LIke 30% faster to render 2 instances of nuke on the same comp >> with 8 threads vs one version on 16. Are we still having threading issues >> on the Mac side. >> >> Randy S. Little >> http://www.rslittle.com <http://reel.rslittle.com> >> >> >> ------------------------------ >> _______________________________________________ >> Nuke-users mailing list >> [email protected], http://forums.thefoundry.co.uk/ >> http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users >> >> _______________________________________________ >> Nuke-users mailing list >> [email protected], http://forums.thefoundry.co.uk/ >> http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users >> > > > ------------------------------ > _______________________________________________ > Nuke-users mailing list > [email protected], http://forums.thefoundry.co.uk/ > http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users > > > _______________________________________________ > Nuke-users mailing list > [email protected], http://forums.thefoundry.co.uk/ > http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users >
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