Messages

1

Hardware / Re: Performance Issue on new workstation Xeon Gold

« on: 2018-05-30, 13:38:06 »

Webhallen (they built this machine) are looking in to this issue at the moment and they are reporting back to me. The blender test did show similar results. I was also thinking about relation to a certain instrucion set, but it does not seem to be the case. The last test they did recently was to test the same blender scene but with the fans set to run at 100% and it actually helped. Now they are testing with Corona again and I am waiting to get results from them. They are also in contact with intel, since this seem to be related to temperature in the end. I will be back with more information soon.

2

[Max] I need help! / Re: Rendering performance issue - Corona Bitmap vs Max Bitmap

« on: 2018-05-24, 13:56:06 »

Question: is the render fast in the beginning and slows down after some time? By the looks of the statistics from your screenshots, there is a huge gap between rays/s total and rays/s actual, which could be the case if the render starts at a very high performance level and then drops. That is a problem I have with a new workstation:

https://forum.corona-renderer.com/index.php?topic=20453.0

I was thinking ot could be the same issue, although I have no solution yet.

3

Hardware / Re: Performance Issue on new workstation Xeon Gold

« on: 2018-05-23, 19:31:40 »

Thank you for your reply. I will try with an exported scene to Corona Standalone and then I will also try a scene with blender as soon as I can, since I don't have Vray. Will be back with results tomorrow.

4

Hardware / Performance Issue on new workstation Xeon Gold

« on: 2018-05-23, 15:06:54 »

Hello, I am experiencing a really strange performance issue on my new workstation. It starts at the renderer performance level I expect in comparison to my old workstation, around 275% faster. But after a few minutes, it drops to a fraction of where it started, about 27% of the render performance of the old workstation.

• In activity monitor, I see no signs of thermal throttling. The CPUs are at 2.9 GHz all the time. (Or maybe thermal throttling doesn't appear in activity monitor?)
• The CPUs are all on 100% workload
• The CPUs all have sufficient power supply.
• The CPU temperatures start at 50° celcius.
• The temperatures increase to 69°, but performance start dropping after only a few minutes and CPUs are not even above 55° when performance level starts to drop.
• When looking at rays/s it starts at 3.5 million, drops to 380 000 after about 4 minutes.
• Old workstation starts at 1.38 million and stays there throughout the whole render time.
• After 1 hour and 24 minutes, the new workstations made 6 passes, the old one 16!
• It show similar results on ART render. Hardware related?


Specs on new workstation:
• Asus Sage C621 Motherboard. 2x LGA 3647 Socket.
• Dual Xeon Gold 6142, 16 cores 2.6 GHz.
• 128GB 2667 MHz ECC RAM
• GTX 1080ti
• 2TB Samsung Evo Pro
• Windows 10
• 3ds max 2019
• Corona Renderer 1.7 hotfix 4

Specs on old workstation:
• Mac Pro late 2013 (Darth Vader's Coffee Machine)
• Single Xeon E5-2697v2, 12 cores, 2.66 GHz.
• 64GB ECC RAM
• AMD FirePro D700
• 1TB PCIe Flash
• Windows 10
• 3ds max 2019
• Corona Renderer 1.7 hotfix 4


Any suggestions?