Maya Mental Ray wont use Dual Processor

[poly-phobic]

u can try and render from the command line and explicitely tell MR to use 2 processors.

[liquid_tension]

can you explain me how this is done? please

[Randolph]

type (in the command line):

"render -h"
or
"render -r mr -help"

That will give you a list of parameters for the render command.

[liquid_tension]

i have tried that but i get an error message saying invalid flag -r

[Randolph]

Hmm, try "-renderer" instead. This flag determines which renderer you will use. Anyway, the first lines of "render -help" show the basic parameters.

[poly-phobic]

maya_renderwith_mr filename.mb

[skillet]

this doesn't really seem like the right answer but anyway

are'nt xeons hyperthreaded

try using four threads, instead of two

[TomD]

Ow, I can be wrong but I always thougt that Mental Ray for Maya was licenced for 1 processor only. If you want to use multiple processors you'd have to buy Mental Ray standalone.

[mimo8]

I also heard abbout something like that, but I think its a bit different.
mental ray in maya works with dual processors (I remember it cause the G5 has good benchmarks with mr ... it wouldnt have them just using one of its processors)

I think that the mr standalone just works for one processor and you need to get a second license for each new processor

hope I am right - correct me if I´m wrong
:shrug:

[dann_stubbs]

I also heard abbout something like that, but I think its a bit different.
mental ray in maya works with dual processors (I remember it cause the G5 has good benchmarks with mr ... it wouldnt have them just using one of its processors)

I think that the mr standalone just works for one processor and you need to get a second license for each new processor

hope I am right - correct me if I´m wrong
:shrug:

mental ray for maya can use two processors from the factory. since xeons are HT then they look like four processors.

your mental ray is using one physical processor (two virtual processors) so the other physical processor (the other two virtual processors) is not being used. so you are using just one = 100% of one processor.

if you turn off HT then you should see both processors go to 100% - this actually would probably yield better performance then the HT virtual second processor.

dann

[mimo8]

excuse my ignorance, but what does HT mean.
same like virtual memory?

does this count for every other dualprocessor as well?
how is it with apple G5´s?

thnx

[Randolph]

excuse my ignorance, but what does HT mean.
same like virtual memory?

does this count for every other dualprocessor as well?
how is it with apple G5´s?

thnx

HT stands for "HyperThreading". It's a special technology of Intel™ CPUs that uses the free resources of a processor during computing specific operations. So it's like a virtual second processor, and like a dual CPU system, it doesn't mean that it's twice as fast as a single CPU. If an application doesn't support dual CPU features, there's no advantege.
And because of it's an Intel thing, Macs aren't concerned.

[dann_stubbs]

excuse my ignorance, but what does HT mean.
same like virtual memory?

does this count for every other dualprocessor as well?
how is it with apple G5´s?

thnx

HT can add a 20% speed boost in certain operations. but not all things benefit from it.

in this case his two processor MR license is being used by the real processor and the virtual one - which could in theory only be 120%

if he turned off HT then the license would use the two physical processors - this could be a 180-190% utilization.

macs and amd are all exploring and developing dual or multi-core chips - so soon HT or a similar equivalant will be everywhere. there are situations where HT is actually slower then using non-HT. all depends...

dann

[skillet]

wether it is licensed for one two or whatever, I personally have dual amd processors.
And mental ray batch asks me wether or not I'd like to use up to 4 threads.

I choose four, don't really know if I gain anything from that or not.

to my knowledge amd mps aren't hyperthreaded.

anyway in your case choose four, and see what happens. if you can't choose four, then check your BIOS and see if you actually have the second one turned on.

[liquid_tension]

is it easy to turn of hyper thread on Xeon proccesors? I have no clue on how to do that, if anyone knows I would be thankful if can explain

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