I mean dual quad not dual core. Randy S. Little http://reel.rslittle.com http://imdb.com/name/nm2325729/ <http://www.linkedin.com/in/rslittle>
On Fri, Feb 3, 2012 at 20:57, Randy Little <[email protected]> wrote: > Im not talking about turning HT off Im talking about setting Nuke to 16 > from 8 on dual core. I tested it on 3 boxes with different comps and on > none was it faster to set nuke to use more the the max real cores. but it > was faster to run 2 instances set to 8 each to render. I don't recall this > being the case on z800's running linux. > > Randy S. Little > http://reel.rslittle.com > http://imdb.com/name/nm2325729/ > <http://www.linkedin.com/in/rslittle> > > > > On Fri, Feb 3, 2012 at 20:46, Diogo Girondi <[email protected]>wrote: > >> >From what I've seen these new procs run faster with HT on. The old dual >> core Xeons (circa 2007) on the other hand use to be faster with the HT >> turned off. At least with Nuke from the tests I did at the time. >> >> On Sat, Feb 4, 2012 at 12:47 AM, Deke Kincaid <[email protected]>wrote: >> >>> I just said that someone on Ars-technica did a test and found that >>> using hyperthreading was faster then not using it. Not that I tested >>> it. >>> >>> -deke >>> >>> On Fri, Feb 3, 2012 at 16:59, Randy Little <[email protected]> wrote: >>> > 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/ >>> > >>> > >>> > >>> > >>> > 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 >>> >> Sent: Friday, February 03, 2012 4:07 PM >>> >> To: Nuke user discussion >>> >> 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 >>> >>> Sent: Friday, February 03, 2012 3:47 PM >>> >>> To: Nuke user discussion >>> >>> 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 >>> >>> >>> >>> >>> >>> ________________________________ >>> >>> _______________________________________________ >>> >>> 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 >>> > >>> > >>> > >>> > _______________________________________________ >>> > 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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