Chaos Corona Forum

Chaos Corona for 3ds Max => [Max] Bug Reporting => [Max] Resolved Bugs => Topic started by: SaY on 2015-10-12, 20:58:28

Title: 64 threads limit
Post by: SaY on 2015-10-12, 20:58:28

Right now if you try to render with a pair of e5-2699V3 (72 threads), corona would use only 50% of the CPU. It renders fine with HT off, but it means loosing 15-20% of speed.
Is it possible to make Corona to use more than 64 threads? Cinebench works fine with all 72 threads. Chaosgroup seems to have resolved the issue in the latest builds of Vray.
Thank you.

Title: Re: 64 threads limit
Post by: romullus on 2015-10-12, 21:22:12

There was discussion about this problem while ago. You may want to read this: https://forum.corona-renderer.com/index.php/topic,5859.0.html

Title: Re: 64 threads limit
Post by: SaY on 2015-10-13, 16:19:59

Thanks. Yes, I read that post. That's workaround, not a solution.
Also, running a second DR server on a render node won't work.
Latest Vray builds work with more than 64 threads, they fixed it since than.

Title: Re: 64 threads limit
Post by: Ondra on 2015-10-20, 20:50:29

Should be fixed in todays daily, can you give it a try?

Title: Re: 64 threads limit
Post by: SaY on 2015-10-28, 21:05:38

Ondra, thanks for fixing it.
I installed 1.3 RC5 - works great so far. All 72 threads are at 100%
About 25% performance increase. My test scene gives me 20M rays/s, vs 15M with HT off.

Title: Re: 64 threads limit
Post by: arqrenderz on 2015-10-28, 21:17:13

can you share the test scene??

Title: Re: 64 threads limit
Post by: SaY on 2015-10-28, 21:21:53

Sorry, I can't - client had me sign NDA. Its just a current work scene, not a dedicated test - if thats what you were asking.