Dual GPU, syphon, HAP4k, stalling, need help please

Post your questions here and we'll all try to help.
Post Reply
jiaju1993
Met Resolume in a bar the other day
Posts: 9
Joined: Thu Oct 17, 2019 02:13

Dual GPU, syphon, HAP4k, stalling, need help please

Post by jiaju1993 »

Dear all:

I am using dual nvidia 1070 (z370) + 8700k, macOS: 10.13.6, using arena 6.1.1 for mac

I am using 3 monitors on each graphic card, total 6, (each 1920x1080), playing hap video, 4k

when using arena alone, the video played quite smooth, without any problem.

but when using syphon output to other app, the video is stalling, even can be noticed just in arena preview window

if using just one GPU, the stalling is disappeared, all went well again.

Please help~~ is it my hardware's problem, or syphon is not support two nvidia gpu cards?

Zoltán
Team Resolume
Posts: 7088
Joined: Thu Jan 09, 2014 13:08
Location: Székesfehérvár, Hungary

Re: Dual GPU, syphon, HAP4k, stalling, need help please

Post by Zoltán »

Dual nvidia hackintosh... you're brave :shock:

Any reason you're not using the latest 6.1.4 Arena?
Software developer, Sound Engineer,
Control Your show with ”Enter” - multiple Resolume servers at once - SMPTE/MTC column launch
try for free: http://programs.palffyzoltan.hu

jiaju1993
Met Resolume in a bar the other day
Posts: 9
Joined: Thu Oct 17, 2019 02:13

Re: Dual GPU, syphon, HAP4k, stalling, need help please

Post by jiaju1993 »

Sorry, I did not notice the newer version, will try it tomorrow.

Meanwhile, i used windows 10 and arena 6.1.1 for win, spout to another app, if using dual Nvidia 1070 output, got stalling too, but smooth with single GPU output

I will try 6.1.4 and 7, but i don't think that is the answer.

Zoltán
Team Resolume
Posts: 7088
Joined: Thu Jan 09, 2014 13:08
Location: Székesfehérvár, Hungary

Re: Dual GPU, syphon, HAP4k, stalling, need help please

Post by Zoltán »

Yeah, it's probably the apps rendering and sharing the textures on different GPU-s.
Do you have both programs assigned to the same GPU for sure?

Alternatively if your other app supports NDI, you could try that as a workaround.
Software developer, Sound Engineer,
Control Your show with ”Enter” - multiple Resolume servers at once - SMPTE/MTC column launch
try for free: http://programs.palffyzoltan.hu

User avatar
Oaktown
Resolume honorary member
Posts: 2837
Joined: Tue May 08, 2012 15:19
Location: Oakland, CA

Re: Dual GPU, syphon, HAP4k, stalling, need help please

Post by Oaktown »

The 8700K is probably your bottleneck:
Intel 8700K Expansion Options
Scalability:1S Only
PCI Express Revision: 3.0
PCI Express Configurations: Up to 1x16, 2x8, 1x8+2x4
Max # of PCI Express Lanes: 16

jiaju1993
Met Resolume in a bar the other day
Posts: 9
Joined: Thu Oct 17, 2019 02:13

Re: Dual GPU, syphon, HAP4k, stalling, need help please

Post by jiaju1993 »

You mean the number of PCIe lanes ? I am using x8 + x8 now. maybe x16 + x16 should work?

User avatar
Oaktown
Resolume honorary member
Posts: 2837
Joined: Tue May 08, 2012 15:19
Location: Oakland, CA

Re: Dual GPU, syphon, HAP4k, stalling, need help please

Post by Oaktown »

The issue is that your main GPU (the one with the UI) is doing the rendering for both GPUs, and right now you're using it at half speed so in essence, it's doing twice the work with half the power so you're at 25% return on your investment!

The ideal way to do what you're trying to do would be to use a Datapath FX4 or even an older X4 so that you can get UI, +2 from GPU, +1 from GPU to 4 on Datapath.

Also, do yourself a favor and convert all your media to DXV3!

jiaju1993
Met Resolume in a bar the other day
Posts: 9
Joined: Thu Oct 17, 2019 02:13

Re: Dual GPU, syphon, HAP4k, stalling, need help please

Post by jiaju1993 »

for that, Datapath FX4 is not directly sold in my country, using some agent to buy needs at least 3k us dollars for one

I am now trying quadhead2go, but it still not releases 1.0 firmware (0.9 beta is also works, btw)

for now, I will try PCIe4.0 8x+8x while waiting the 1.0 firmware

jiaju1993
Met Resolume in a bar the other day
Posts: 9
Joined: Thu Oct 17, 2019 02:13

Re: Dual GPU, syphon, HAP4k, stalling, need help please

Post by jiaju1993 »

also, if not using spout to other app, the video is played quit smooth by arena when using six output (dual GPU)

so it is not the first gpu do twice while bandwidth 50%

BTW: using newest version of arena, still get stalling

I think is the apps i use to receive spout / syphon, did not process video data / texture like arena, which using main GPU alone

Post Reply