Search found 15 matches

by voxelium
Tue Jan 21, 2014 4:02 pm
Forum: Links & Papers
Topic: Stackless MBVH Traversal for CPU, MIC and GPU Ray Tracing
Replies: 15
Views: 16257

Re: Stackless MBVH Traversal for CPU, MIC and GPU Ray Tracin

Paper/code or it didn't happen! ;) I'm also using single-ray MBVH on CPU & MIC, but for me it's better than MBVH/RS even for first bounce rays: http://www.cs.ubbcluj.ro/~afra/publications/afra2013tr_mbvh8.pdf A ~20% speedup sounds perfectly reasonable (what about multi-threaded perf though?), bu...
by voxelium
Tue Jan 21, 2014 12:15 pm
Forum: Links & Papers
Topic: Stackless MBVH Traversal for CPU, MIC and GPU Ray Tracing
Replies: 15
Views: 16257

Re: Stackless MBVH Traversal for CPU, MIC and GPU Ray Tracin

Whoa, a magnitude of performance behind? Compared to what exactly?
by voxelium
Thu Nov 21, 2013 1:32 pm
Forum: Links & Papers
Topic: Stackless MBVH Traversal for CPU, MIC and GPU Ray Tracing
Replies: 15
Views: 16257

Stackless MBVH Traversal for CPU, MIC and GPU Ray Tracing

Stackless Multi-BVH Traversal for CPU, MIC and GPU Ray Tracing Attila T. Áfra and László Szirmay-Kalos Computer Graphics Forum (2013) http://voxelium.wordpress.com/2013/11/21/stackless-multi-bvh-traversal-for-cpu-mic-and-gpu-ray-tracing/ Personal copy: http://cg.iit.bme.hu/~afra/publications/afra201...
by voxelium
Mon Sep 16, 2013 10:06 am
Forum: Visuals
Topic: giga rays on intel phi
Replies: 24
Views: 23021

Re: giga rays on intel phi

Dade wrote:There is a Quadro card with 12GB of ram, what is the larger memory configuration available for Xeon Phi ?

16 GB: http://ark.intel.com/products/75799/Int ... Hz-61-core
by voxelium
Mon Sep 09, 2013 11:03 pm
Forum: Visuals
Topic: giga rays on intel phi
Replies: 24
Views: 23021

Re: giga rays on intel phi

jbikker wrote:By the way, I'm not sure how the phi will behave with divergent rays

In my experience, the Phi handles incoherent rays pretty well: https://twitter.com/attila_afra/status/ ... to/1/large
by voxelium
Fri Sep 06, 2013 10:58 am
Forum: Links & Papers
Topic: Faster Incoherent Ray Traversal Using 8-Wide AVX Instruction
Replies: 2
Views: 4554

Re: Faster Incoherent Ray Traversal Using 8-Wide AVX Instruc

Thanks! Not sure about the GPU, I think it's worth investigating, but going beyond 8-way branching is probably not a good idea.
by voxelium
Thu Sep 05, 2013 10:59 am
Forum: Links & Papers
Topic: Faster Incoherent Ray Traversal Using 8-Wide AVX Instruction
Replies: 2
Views: 4554

Faster Incoherent Ray Traversal Using 8-Wide AVX Instruction

http://voxelium.wordpress.com/2013/08/14/faster-incoherent-ray-traversal-using-8-wide-avx-instructions/

Unfortunately the improvement is small compared to SSE, but at least it's consistently faster and easy to implement.
by voxelium
Thu Sep 05, 2013 10:53 am
Forum: Visuals
Topic: giga rays on intel phi
Replies: 24
Views: 23021

Re: giga rays on intel phi

Impressive performance! Are your kernels publicly available somewhere?

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