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Loading kernels tooo slow
Posted: Thu Jul 01, 2021 11:24 am
by zooropa
Hi. Is there anyway to speed up the loading kernel process ?
The amount of time I have to wait is really really long
Thank you
Re: Loading kernels tooo slow
Posted: Thu Jul 01, 2021 12:03 pm
by Dade
zooropa wrote: ↑Thu Jul 01, 2021 11:24 am
The amount of time I have to wait is really really long
It is one time operations. The kernel cache is stored in tmp directory on Windows, you may have some kind of file cleaner, erasing the content of the cache at each reboot. This is likely to be the source of your problem.
Re: Loading kernels tooo slow
Posted: Tue Jul 06, 2021 7:21 am
by kintuX
Could then be possible to just have a command for load/compile shaders using single GPU w/o running Blender and rendering a scene.
Something like Arnold's
'Pre-populate GPU Cache'?.
Pre-populate GPU Cache
This pre-populates the GPU program disk cache. Pre-population is optional, but once done, this allows subsequent GPU renders start faster. The cache is stored on disk, but if the NVIDIA driver is updated, or the GPU hardware configuration changed, the cache may be stale and need to be re-populated.
Note that pre-populating the cache may take 15 minutes or more to run.
Re: Loading kernels tooo slow
Posted: Tue Jul 06, 2021 9:06 am
by Dade
kintuX wrote: ↑Tue Jul 06, 2021 7:21 am
This pre-populates the GPU program disk cache. Pre-population is optional, but once done, this allows subsequent GPU renders start faster. The cache is stored on disk, but if the NVIDIA driver is updated, or the GPU hardware configuration changed, the cache may be stale and need to be re-populated.
It is already available in LuxCore API and exposed by LuxCoreUI executable (but not by BlendLuxCore).
Re: Loading kernels tooo slow
Posted: Tue Jul 06, 2021 10:18 pm
by B.Y.O.B.
kintuX wrote: ↑Tue Jul 06, 2021 7:21 am
Could then be possible to just have a command for load/compile shaders using single GPU w/o running Blender and rendering a scene.
I don't really see an advantage that would have over opening a simple cube scene and pressing render to trigger the kernel compilation.
Re: Loading kernels tooo slow
Posted: Wed Jul 07, 2021 7:19 pm
by kintuX
Dade wrote: ↑Tue Jul 06, 2021 9:06 am
kintuX wrote: ↑Tue Jul 06, 2021 7:21 am
This pre-populates the GPU program disk cache. Pre-population is optional, but once done, this allows subsequent GPU renders start faster. The cache is stored on disk, but if the NVIDIA driver is updated, or the GPU hardware configuration changed, the cache may be stale and need to be re-populated.
It is already available in LuxCore API and exposed by LuxCoreUI executable (but not by BlendLuxCore).
Sorry for my ignorance but is there any command line documentation/specs described, or which one specifically triggers it?
Re: Loading kernels tooo slow
Posted: Thu Jul 08, 2021 10:33 am
by Dade
kintuX wrote: ↑Wed Jul 07, 2021 7:19 pm
Dade wrote: ↑Tue Jul 06, 2021 9:06 am
It is already available in LuxCore API and exposed by LuxCoreUI executable (but not by BlendLuxCore).
Sorry for my ignorance but is there any command line documentation/specs described, or which one specifically triggers it?
This:
Re: Loading kernels tooo slow
Posted: Sun Jul 18, 2021 12:28 pm
by kintuX
Ran it & does Path OCL, so when I start with Blender it does it all over again for CUDA
Re: Loading kernels tooo slow
Posted: Thu Jul 22, 2021 9:02 am
by Dade
kintuX wrote: ↑Sun Jul 18, 2021 12:28 pm
Ran it & does Path OCL, so when I start with Blender it does it all over again for CUDA
Uh ? No, it uses the default devices: if you have CUDA, they are all CUDA devices (otherwise all OpenCL devices)
Re: Loading kernels tooo slow
Posted: Thu Jul 22, 2021 9:42 am
by B.Y.O.B.
It might be the default epsilon settings that are different between luxcoreui and BlendLuxCore.