LuxCoreRender Forums

Hello,

I have updated to blender 2.92 and luxcore 2.5 (tried latest aswell) and it does not seem to be using my GPU as the CPU hits 100% and GPU is basically 10%.

I have the GPU set as I had in the older version of blender and I have got the latest nvidia drivers as of yesterday. I have run blender in debug mode but I am not really sure what I am looking for but it seems to mention my card and optix.

Am I missing something simple on this because for example if I use ATI render engine that happily uses the whole GPU and renders as quick as I would expect.

Not sure if this is any help but a snippit from the debug. all I am doing is rendering the basic cube

[LuxRays][1053.125] Total Optix memory usage: 2Kbytes
[LuxCore][1053.188] [PathOCLRenderEngine] OpenCL task count: 262144
[LuxCore][1053.188] [PathOCLBaseRenderEngine] OpenCL max. page memory size: 18014398509481983Kbytes
[LuxCore][1053.188] Compile Geometry
[LuxCore][1053.188] Scene geometry compilation time: 0ms
[LuxCore][1053.188] Compile 1 Textures
[LuxCore][1053.188] Texture evaluation ops count: 3
[LuxCore][1053.188] Texture evaluation max. stack size: 3
[LuxCore][1053.188] Textures compilation time: 0ms
[LuxCore][1053.188] Compile 1 Materials
[LuxCore][1053.188] Material evaluation ops count: 7
[LuxCore][1053.188] Material evaluation max. stack size: 8
[LuxCore][1053.188] Material compilation time: 0ms
[LuxCore][1053.188] Compile Lights
[LuxCore][1053.188] Lights compilation time: 0ms
[LuxCore][1053.188] Compile ImageMaps
[LuxCore][1053.188] Image maps page(s) count: 1
[LuxCore][1053.188] RGB channel page 0 size: 3072Kbytes
[LuxCore][1053.188] Image maps compilation time: 0ms
[LuxCore][1053.188] Always enabled OpenCL code:
[LuxCore][1053.188] Compile Geometry
[LuxCore][1053.188] Scene geometry compilation time: 0ms
[LuxCore][1053.188] Compile 1 Textures
[LuxCore][1053.188] Texture evaluation ops count: 3
[LuxCore][1053.188] Texture evaluation max. stack size: 3
[LuxCore][1053.203] Textures compilation time: 14ms
[LuxCore][1053.203] Compile 1 Materials
[LuxCore][1053.203] Material evaluation ops count: 7
[LuxCore][1053.203] Material evaluation max. stack size: 8
[LuxCore][1053.203] Material compilation time: 0ms
[LuxCore][1053.203] Compile Lights
[LuxCore][1053.203] Lights compilation time: 0ms
[LuxCore][1053.203] Compile ImageMaps
[LuxCore][1053.203] Image maps page(s) count: 1
[LuxCore][1053.203] RGB channel page 0 size: 3072Kbytes
[LuxCore][1053.203] Image maps compilation time: 0ms
[LuxCore][1053.203] Starting 1 OpenCL render threads
[LuxRays][1053.235] [Device NVIDIA GeForce RTX 2060 CUDAIntersect] RADIANCE_PER_PIXEL_NORMALIZEDs[0] buffer size: 32,400Kbytes
[LuxRays][1053.235] [Device NVIDIA GeForce RTX 2060 CUDAIntersect] NOISE buffer size: 8,100Kbytes
[LuxRays][1053.266] [Device NVIDIA GeForce RTX 2060 CUDAIntersect] RADIANCE_PER_PIXEL_NORMALIZEDs[0] buffer size: 32,400Kbytes
[LuxRays][1053.266] [Device NVIDIA GeForce RTX 2060 CUDAIntersect] Camera buffer size: 5,492bytes
[LuxRays][1053.266] [Device NVIDIA GeForce RTX 2060 CUDAIntersect] Normals buffer size: 288bytes
[LuxRays][1053.266] [Device NVIDIA GeForce RTX 2060 CUDAIntersect] UVs buffer size: 192bytes
[LuxRays][1053.266] [Device NVIDIA GeForce RTX 2060 CUDAIntersect] Triangle normals buffer size: 144bytes
[LuxRays][1053.266] [Device NVIDIA GeForce RTX 2060 CUDAIntersect] Vertices buffer size: 288bytes
[LuxRays][1053.266] [Device NVIDIA GeForce RTX 2060 CUDAIntersect] Triangles buffer size: 144bytes
[LuxRays][1053.266] [Device NVIDIA GeForce RTX 2060 CUDAIntersect] Mesh description buffer size: 312bytes
[LuxRays][1053.266] [Device NVIDIA GeForce RTX 2060 CUDAIntersect] ImageMap descriptions buffer size: 32bytes
[LuxRays][1053.266] [Device NVIDIA GeForce RTX 2060 CUDAIntersect] ImageMaps buffer size: 3,072Kbytes
[LuxRays][1053.266] [Device NVIDIA GeForce RTX 2060 CUDAIntersect] Textures buffer size: 328bytes
[LuxRays][1053.266] [Device NVIDIA GeForce RTX 2060 CUDAIntersect] Texture evaluation ops buffer size: 24bytes
[LuxRays][1053.266] [Device NVIDIA GeForce RTX 2060 CUDAIntersect] Texture evaluation stacks buffer size: 3,072Kbytes
[LuxRays][1053.266] [Device NVIDIA GeForce RTX 2060 CUDAIntersect] Materials buffer size: 228bytes
[LuxRays][1053.266] [Device NVIDIA GeForce RTX 2060 CUDAIntersect] Material evaluation ops buffer size: 84bytes
[LuxRays][1053.266] [Device NVIDIA GeForce RTX 2060 CUDAIntersect] Material evaluation stacks buffer size: 8,192Kbytes
[LuxRays][1053.266] [Device NVIDIA GeForce RTX 2060 CUDAIntersect] Scene objects buffer size: 24bytes
[LuxRays][1053.266] [Device NVIDIA GeForce RTX 2060 CUDAIntersect] Lights buffer size: 688bytes
[LuxRays][1053.266] [Device NVIDIA GeForce RTX 2060 CUDAIntersect] Env. light indices buffer size: 4bytes
[LuxRays][1053.266] [Device NVIDIA GeForce RTX 2060 CUDAIntersect] Light offsets (Part I) buffer size: 4bytes
[LuxRays][1053.266] [Device NVIDIA GeForce RTX 2060 CUDAIntersect] Env. light distributions buffer size: 1,028Kbytes
[LuxRays][1053.266] [Device NVIDIA GeForce RTX 2060 CUDAIntersect] LightsDistribution buffer size: 24bytes
[LuxRays][1053.266] [Device NVIDIA GeForce RTX 2060 CUDAIntersect] InfiniteLightSourcesDistribution buffer size: 24bytes
[LuxRays][1053.266] [Device NVIDIA GeForce RTX 2060 CUDAIntersect] Ray buffer size: 12,288Kbytes
[LuxRays][1053.266] [Device NVIDIA GeForce RTX 2060 CUDAIntersect] RayHit buffer size: 5,120Kbytes
[LuxRays][1053.266] [Device NVIDIA GeForce RTX 2060 CUDAIntersect] GPUTaskConfiguration buffer size: 328bytes
[LuxRays][1053.266] [Device NVIDIA GeForce RTX 2060 CUDAIntersect] GPUTask buffer size: 169,984Kbytes
[LuxRays][1053.266] [Device NVIDIA GeForce RTX 2060 CUDAIntersect] GPUTaskDirectLight buffer size: 15,360Kbytes
[LuxRays][1053.266] [Device NVIDIA GeForce RTX 2060 CUDAIntersect] GPUTaskState buffer size: 100,352Kbytes
[LuxRays][1053.266] [Device NVIDIA GeForce RTX 2060 CUDAIntersect] GPUTask Stats buffer size: 1,024Kbytes
[LuxRays][1053.266] [Device NVIDIA GeForce RTX 2060 CUDAIntersect] SamplerSharedData buffer size: 8,109Kbytes
[LuxCore][1053.281] [PathOCLBaseRenderThread::0] Size of a Sample: 40bytes
[LuxRays][1053.281] [Device NVIDIA GeForce RTX 2060 CUDAIntersect] Sample buffer size: 10,240Kbytes
[LuxCore][1053.281] [PathOCLBaseRenderThread::0] Size of a SampleData: 8bytes
[LuxRays][1053.281] [Device NVIDIA GeForce RTX 2060 CUDAIntersect] SampleData buffer size: 2,048Kbytes
[LuxCore][1053.281] [PathOCLBaseRenderThread::0] Size of a SampleResult: 428bytes
[LuxRays][1053.281] [Device NVIDIA GeForce RTX 2060 CUDAIntersect] SampleResult buffer size: 109,568Kbytes
[LuxRays][1053.281] [Device NVIDIA GeForce RTX 2060 CUDAIntersect] PathInfo buffer size: 27,648Kbytes
[LuxRays][1053.281] [Device NVIDIA GeForce RTX 2060 CUDAIntersect] DirectLightVolumeInfo buffer size: 11,264Kbytes
[LuxRays][1053.281] [Device NVIDIA GeForce RTX 2060 CUDAIntersect] Pixel Filter Distribution buffer size: 33Kbytes
[LuxCore][1053.281] [PathOCLBaseRenderThread::0] Compiling kernels
[LuxRays][1053.281] [PathOCL kernel] Compiler options: -D LUXRAYS_OPENCL_KERNEL -D SLG_OPENCL_KERNEL -D RENDER_ENGINE_PATHOCL -D PARAM_RAY_EPSILON_MIN=1e-05f -D PARAM_RAY_EPSILON_MAX=0.1f -D LUXRAYS_CUDA_DEVICE -D LUXRAYS_OS_WINDOWS --use_fast_math
[LuxRays][1053.281] [PathOCL kernel] Compiling kernels
[LuxRays][1053.328] [PathOCL kernel] Program cached
[LuxCore][1053.328] [PathOCLBaseRenderThread::0] Compiling Film_Clear Kernel
[LuxCore][1053.328] [PathOCLBaseRenderThread::0] Compiling InitSeed Kernel
[LuxCore][1053.328] [PathOCLBaseRenderThread::0] Compiling Init Kernel
[LuxCore][1053.328] [PathOCLBaseRenderThread::0] Compiling AdvancePaths_MK_RT_NEXT_VERTEX Kernel
[LuxCore][1053.328] [PathOCLBaseRenderThread::0] Compiling AdvancePaths_MK_HIT_NOTHING Kernel
[LuxCore][1053.328] [PathOCLBaseRenderThread::0] Compiling AdvancePaths_MK_HIT_OBJECT Kernel
[LuxCore][1053.328] [PathOCLBaseRenderThread::0] Compiling AdvancePaths_MK_RT_DL Kernel
[LuxCore][1053.328] [PathOCLBaseRenderThread::0] Compiling AdvancePaths_MK_DL_ILLUMINATE Kernel
[LuxCore][1053.328] [PathOCLBaseRenderThread::0] Compiling AdvancePaths_MK_DL_SAMPLE_BSDF Kernel
[LuxCore][1053.328] [PathOCLBaseRenderThread::0] Compiling AdvancePaths_MK_GENERATE_NEXT_VERTEX_RAY Kernel
[LuxCore][1053.328] [PathOCLBaseRenderThread::0] Compiling AdvancePaths_MK_SPLAT_SAMPLE Kernel
[LuxCore][1053.328] [PathOCLBaseRenderThread::0] Compiling AdvancePaths_MK_NEXT_SAMPLE Kernel
[LuxCore][1053.328] [PathOCLBaseRenderThread::0] Compiling AdvancePaths_MK_GENERATE_CAMERA_RAY Kernel
[LuxCore][1053.328] [PathOCLBaseRenderThread::0] AdvancePaths_MK_* workgroup size: 32
[LuxCore][1053.328] [PathOCLBaseRenderThread::0] Kernels compilation time: 46ms
[LuxCore][1053.328] Starting 8 native render threads
Session started in 0.3 s
[LuxCore][1053.422] Film hardware image pipeline
[LuxCore][1054.219] Film hardware device used: NVIDIA GeForce RTX 2060 CUDAIntersect (Type: CUDA_GPU)
[LuxRays][1054.219] [Device NVIDIA GeForce RTX 2060 CUDAIntersect] IMAGEPIPELINE buffer size: 24,300Kbytes
[LuxRays][1054.391] [Device NVIDIA GeForce RTX 2060 CUDAIntersect] Merge buffer size: 32,400Kbytes
[LuxRays][1054.391] [MergeSampleBuffersOCL] Compiler options: -D LUXRAYS_OPENCL_KERNEL -D SLG_OPENCL_KERNEL -D LUXRAYS_CUDA_DEVICE -D LUXRAYS_OS_WINDOWS --use_fast_math
[LuxRays][1054.391] [MergeSampleBuffersOCL] Compiling kernels
[LuxRays][1054.406] [MergeSampleBuffersOCL] Program cached
[LuxCore][1054.406] [MergeSampleBuffersOCL] Compiling Film_MergeBufferInitialize Kernel
[LuxCore][1054.406] [MergeSampleBuffersOCL] Compiling Film_MergeRADIANCE_PER_PIXEL_NORMALIZED Kernel
[LuxCore][1054.406] [MergeSampleBuffersOCL] Compiling Film_MergeRADIANCE_PER_SCREEN_NORMALIZED Kernel
[LuxCore][1054.406] [MergeSampleBuffersOCL] Compiling Film_MergeBufferFinalize Kernel
[LuxCore][1054.406] [MergeSampleBuffersOCL] Kernels compilation time: 14ms
[LuxRays][1055.031] [LinearToneMap] Compiler options: -D LUXRAYS_OPENCL_KERNEL -D SLG_OPENCL_KERNEL -D LUXRAYS_CUDA_DEVICE -D LUXRAYS_OS_WINDOWS --use_fast_math
[LuxRays][1055.031] [LinearToneMap] Compiling kernels
[LuxRays][1055.031] [LinearToneMap] Program cached
[LuxCore][1055.031] [AutoLinearToneMap] Compiling LinearToneMap_Apply Kernel
[LuxCore][1055.031] [LinearToneMap] Kernels compilation time: 0ms
Recommended clamp value: 2.520476954350759
[LuxRays][1058.344] [LinearToneMap] Compiler options: -D LUXRAYS_OPENCL_KERNEL -D SLG_OPENCL_KERNEL -D LUXRAYS_CUDA_DEVICE -D LUXRAYS_OS_WINDOWS --use_fast_math
[LuxRays][1058.344] [LinearToneMap] Compiling kernels
[LuxRays][1058.344] [LinearToneMap] Program cached
[LuxCore][1058.344] [AutoLinearToneMap] Compiling LinearToneMap_Apply Kernel
[LuxCore][1058.344] [LinearToneMap] Kernels compilation time: 0ms
[LuxRays][1058.344] [Device NVIDIA GeForce RTX 2060 CUDAIntersect] Gamma table buffer size: 16Kbytes
[LuxRays][1058.344] [GammaCorrectionPlugin] Compiler options: -D LUXRAYS_OPENCL_KERNEL -D SLG_OPENCL_KERNEL -D LUXRAYS_CUDA_DEVICE -D LUXRAYS_OS_WINDOWS --use_fast_math
[LuxRays][1058.344] [GammaCorrectionPlugin] Compiling kernels
[LuxRays][1058.360] [GammaCorrectionPlugin] Program cached
[LuxCore][1058.360] [GammaCorrectionPlugin] Compiling GammaCorrectionPlugin_Apply Kernel
[LuxCore][1058.360] [GammaCorrectionPlugin] Kernels compilation time: 16ms
[LuxCore][1058.578] Noise estimation: first pass
[LuxCore][1062.594] Noise estimation: Error mean = 0.00180671
[LuxRays][1063.485] [Optix][4][DISK CACHE] Closed database: "C:\Users....\AppData\Local\NVIDIA\OptixCache\cache7.db"
[LuxRays][1063.485] [Optix][4][DISK CACHE] Cache data size: "90.6 MiB"
[LuxCore][1063.500] [NVIDIA GeForce RTX 2060 CUDAIntersect] Memory used for hardware image pipeline: 56700Kbytes

What are you using to check the GPU workload ? On Windows, you have to select GPU computing workload, not normal gfx related one.

I am just using task manager to see if the GPU is being used as it was taking longer then before to render things. I have selected all the GPU option in blender as I used to do.

mardymarvin wrote: ↑Mon May 10, 2021 6:35 pm I am just using task manager to see if the GPU is being used as it was taking longer then before to render things. I have selected all the GPU option in blender as I used to do.

What about GPUz

Well that will teach me for relying on a microsoft product I guess I just thought that it would show if the GPU is being used like when watching videos or like the radeon pro render it goes upto 100%. I have used GPUz thanks sharlybg and that does in deed show that the GPU is being 100% utilised when only the standard task manager show 10%. So I guess microsoft and radeon pro render must report usage differently to CPUz and how luxcore is using the card.

Thanks to all for help and advice

You need to switch one of the GPU diagrams to Cuda: