Search found 56 matches

by hobold
Sat Nov 23, 2013 7:37 am
Forum: General Development
Topic: 64 core cpu from intel
Replies: 13
Views: 17982

Re: 64 core cpu from intel

FP64 are only for lazy people working in HPC field, true man uses FP32 :lol: Sorry for derailing further, but that reminds me of a quote attributed to Alan Turing. My memory is hazy, but it went something like this: "Floating point arithmetic is for people who cannot keep track of the position of t...
by hobold
Fri Nov 22, 2013 2:50 pm
Forum: General Development
Topic: 64 core cpu from intel
Replies: 13
Views: 17982

Re: 64 core cpu from intel

Xeon Phi cores are _lot_ slower than today average Xeon cores, I assume that the performance will be awful if you don't use (directly or by OpenCL) the new AVX instructions. Indeed they are slow. Microprocessor experts outside Intel are currently puzzled how the future chip can hit the announced 3 ...
by hobold
Fri Nov 22, 2013 10:50 am
Forum: General Development
Topic: 64 core cpu from intel
Replies: 13
Views: 17982

Re: 64 core cpu from intel

Will this new CPU let regular threaded CPU code run on all the cores? If so that should be a lot faster than using a GPU since CPU code cannot run on a GPU. Some of the Knights Landing models will be able to boot standard PC operating systems, and will be able to serve as a host CPU of the computer...
by hobold
Thu Nov 21, 2013 5:12 pm
Forum: General Development
Topic: 64 core cpu from intel
Replies: 13
Views: 17982

Re: 64 core cpu from intel

Intel will probably publish quite a few case studies and benchmarks with hand tuned AVX-512 code. But if there should ever be a healthy third party software market, then we'll probably see a familiar phenomenon: features usually trump performance. Only some niche applications, which need the speed t...
by hobold
Sun Nov 10, 2013 11:38 am
Forum: General Development
Topic: raytracing bezier patches..
Replies: 5
Views: 6705

Re: raytracing bezier patches..

Bezier spline patches have been in use in graphics for a while, so they are well understood. I wouldn't say that they are the best known type of curved surface, because "best" can mean different things to different people. If you are starting from scratch, you might want to look into subdivision sur...
by hobold
Sat Nov 09, 2013 4:54 pm
Forum: General Development
Topic: newbie (languages)
Replies: 3
Views: 3460

Re: newbie (languages)

If you plan to eventually port the renderer core to the GPU, then try to keep the critical data structures regular and simple. Arrays of identical structs tend to be more amenable to data-parallel processing than more variable organizations of data like hash tables or trees with many different types...
by hobold
Sat Sep 14, 2013 3:27 pm
Forum: Visuals, Tools, Demos & Sources
Topic: giga rays on intel phi
Replies: 24
Views: 27666

Re: giga rays on intel phi

Strange, I would have expected exactly the opposite result :?: I mean, MIC should be less sensible to thread divergence. May be cache, play an important role here :?: Or maybe raw memory bandwidth, and particularly scatter/gather performance, could be the relevant bottleneck here. As far as I know,...
by hobold
Sat Aug 10, 2013 4:02 pm
Forum: Links & Papers
Topic: Ray Tracing is the Future and ever will be
Replies: 23
Views: 25012

Re: Ray Tracing is the Future and ever will be

Moore's Law hasn't really fallen off yet, unless you're only looking at serial performance. True, the 10Ghz processors that were promised with Pentium 4 never materialized, but then came dual-core and quad-core CPUs, not to mention the explosion of GPU performance. Path tracing maps well to paralle...
by hobold
Sat Aug 10, 2013 12:31 am
Forum: Links & Papers
Topic: Ray Tracing is the Future and ever will be
Replies: 23
Views: 25012

Re: Ray Tracing is the Future and ever will be

With gpu speed increasing by say 50% each generation of 1.5 years, it would take about 13 years before path tracing can be done in real time on a gpu. This is assuming that Moore's Law was still in effect. But it has slowed down considerably since the days of 90 nanometer structure sizes (that is t...
by hobold
Tue Jul 23, 2013 2:50 pm
Forum: General Development
Topic: Quadrics kinda sorta work for real time
Replies: 34
Views: 25212

Re: Quadrics kinda sorta work for real time

It turns out that bivariate spline basis functions are not strictly limited to the two dimensional setting (i.e. height fields): http://vectorizer.org/boar/eartorus.png The basic idea is the same as Metaballs. In this example, there would be one ellipsoid component in the center, and a cylindrical c...