Incorrect amount of buckets with DR

V-Ray V-Ray for 3ds Max General
1

Hi all,
i ve got a little problem here with DR and amount of buckets rendering.
3 same machines
intel i7 960 with 12Ghz RAM

thwo rendernodes show both 8 buckets, but the workstation where i run the DR from only shows 4. WHY?

i ve checked, i have all cores checked in the performance rollout…

any ideas? Vlado?

thanks for help

Martin

2

are all of the threads on your workstation rendering? or only half?

3

If you type in the MaxScript listener, renderers.current.system_numThreads what do you get as result?

Best regards,
Vlado

4

only half :frowning:
i will type in the line in maxscript listener as soon as the render finishes and let you guys know
priority settings on the workstation machine are set to NORMAL
and MAXEs afinity is with all the cores checked
may this be because of some settign in BIOS???

its weird co when i use that workstation as a server when rendering through backburner, it uses all 8 cores…it just doesnt when used as the workstation to run the DR from

Thanks

Martin

5

It may be that you have an old scene, where the number of threads was explicitly specified through MaxScript (that’s why I asked). Setting this value to 0 will cause V-Ray to use all cores again.

Best regards,
Vlado

6

the scene is brand new but prepared on a machine with 4 cores…may that be the cause???
will try that line u suggested anyway when it finishes.
Thanks a lot…will keep you posted

7

Hi Vlado,
it shows only 4 cores when i put the line in the listener.

How do i set the value to 0?

Thanks

8

Just write renderers.current.system_numThreads=0 and press Enter.

Best regards,
Vlado

9

great Vlado
THANK YOU!

10

Vlado, this point makes me wonder if its worth exposing num threads in the actual settings dialog as part of the setup. Like most renders, such option would be handy to address problems.

11

i second that request please :slight_smile:

12

or just make it default, and when you open a scene it checks this value and asks to set it to 0 or not

13

weird thing is that i have never ever set in this old scene anything through maxscript to use only 50% of the buckets!
i hardly use maxscript listener…
so this thing just happened :)…the old scene was done in max 9…now i used 2011 to rework it…
whats also strange is that through Backburner or DR…it always uses all the buckets!..but when u render locally, it uses 50% :slight_smile:

14

It’s not that strange… V-Ray specifically ignores this option on the render slaves and for backburner :slight_smile:

Best regards,
Vlado

15

OK Vlado thanks for explanation :slight_smile:

16

Hey Vrayfolks,
I have a dual Xeon X5670 Six Core sitting in the rack for DR Rendering and Backburner. Where the other standard single i7-quadcores show up 8 buckets (4cores with hyperthreading, I suppose) the dual xeon only shows 12 buckets. Shouldn´t it be 24 buckets (2 processors six cores each, hypertreading supported and enabled…)?
Matthias

17

I’ve just read in another thread that some one had a similar issue and it was a bios setting where one of the two cpus was in a different numa group. Not sure if its related to your xeon but worth checking it out.

Yes with two 6 core xeons you should get 24 hyperthreaded cores in total.

18

Hmmm, update: when backburning (without dr), it’s the correct count (24 buckets). I’ll do some other test scenes with local rendering and dr spawning.
Matthias