[Bf-cycles] Houdini export to Cyles

[Mohamed Sakr]

are you sure that tile size is correct? if tile size is 16 or 32, CPU will
be faster than GPU, make tile size 256 x 256 for CUDA

On Fri, Dec 11, 2015 at 12:47 PM, Guillaume Rouault <
guillaume.rouault.fx at gmail.com> wrote:

> oups, I should have tested it on the same scene ... actually it's not that
> fast at all ... I have a core i7-2600k 3.40GHz , and it computes with
> cycles somewhere around 30% faster than my Nvidia GTX 580. I don't know
> if that is normal. Are there some benchmarks somewhere ?
>
> It makes me think about another thing I don't understand :
> Is it an "either or" situation with Cuda and OpenCL ? (i.e when typing
>     cycles.exe --help
> devides listed are :
> -cpu
> -opencl
> -multi
> yet, on my system listed devices are:
> -cpu
> -cuda
>
> How do I get access to openCL capabilities ?
> And could it be faster than Cuda ?
>
> Guillaume
>
>
> On Wed, Dec 9, 2015 at 12:23 PM, Guillaume Rouault <
> guillaume.rouault.fx at gmail.com> wrote:
>
>> Thank you so much Nathan
>> I copy all the .cubin files in a lib directory along cycles.exe , ( I
>> wouldn't have guessed it in a million years :) ) and it works nicely. I
>> have a pretty "crappy" GTX 580, and it's already pretty fast.
>>
>> thanks again
>>
>> Guillaume
>>
>> On Wed, Dec 9, 2015 at 11:57 AM, Nathan Letwory <nathan at mcneel.com>
>> wrote:
>>
>>> -----BEGIN PGP SIGNED MESSAGE-----
>>> Hash: SHA256
>>>
>>> Hi,
>>>
>>> You probably need to ensure cycles.exe can find the lib/ directory
>>> containing the .cubin files. AFAIK by default that'd be a lib/
>>> directory in the directory where your cycles.exe is.
>>>
>>> /Nathan
>>>
>>> On 09/12/2015 12:51, Guillaume Rouault wrote:
>>> > Hi everyone, I have successfully compile a working version of
>>> > cycles. using last availaible sources. I can render the examples
>>> > scenes, no problems, runs fine.
>>> >
>>> > But when I type : cycles.exe --list-devices I can only see my cpu.
>>> > Does that mean there something wrong the compilation process ?
>>>
>>> - --
>>> Nathan Letwory
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>>
>>
>
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