Title: Fractal Extreme updated, 4K video Post by: panzerboy on January 23, 2016, 03:30:51 AM https://randomascii.wordpress.com/2016/01/20/making-a-4k-fractal-movie-with-fractal-extreme/
Title: Re: Fractal Extreme updated, 4K video Post by: Kalles Fraktaler on January 23, 2016, 10:36:13 AM Nice. But if perturbation and SIMD were used, the time to render this move, on that 20-core monster machine, would go from 5.7 days to minutes!!
Title: Re: Fractal Extreme updated, 4K video Post by: simon.snake on January 23, 2016, 12:20:53 PM Long ago before perturbation theory came about, I purchased a license for Fractal eXtreme as it was one of the fastest (if not the fastest) fractal explorer on the market.
However, it's disappointing in that it looks like an almost 20 year old program. It certainly could do with a major overhaul, and get dragged into the modern era. It needs to have improved colour palette options, allow each fractal window to have its own palette, allow users to include other fractal types without requiring Visual Studio, and have a perturbation method. These things would allow the program to be much more useful. Title: Re: Fractal Extreme updated, 4K video Post by: Kalles Fraktaler on January 30, 2016, 01:06:31 PM I tried this location in Kalles Fraktaler on my dualcore laptop. 5 times less pixels were rendered (3840x3840 instead of 3840x2160 with 3x3 antialias) but 5 times less cpu cores were used (4 instead of 20), so that's about equal.
It took 6 hours. That's "only" 22 times faster. But the location, which almost only gooing along the edge needles, does not require a lot of iterations, so the speed up of Kalles Fraktaler is not that obvious on this location. I challenge anyone with the ability to do a render in Mandel Machine! I am unfortunately not able to do that, but I hope someone else is able. The location is attached. Title: Re: Fractal Extreme updated, 4K video Post by: panzerboy on January 30, 2016, 05:50:56 PM Nice. But if perturbation and SIMD were used, the time to render this move, on that 20-core monster machine, would go from 5.7 days to minutes!! I've always thought Fractal Extreme does use SIMD (SSE2) but I cant find any evidence of this online. (Googles Fractal Extreme SSE2) Okay found it! http://www.cygnus-software.com/whybuyfx/releasenotes.htm Version 1.9 October 2003 "Optimization: Fractal eXtreme will now automatically detect if you have an SSE2 capable CPU (such as a Pentium 4) and will use SSE2 instructions for better performance. The speedup varies between 0% and 130%!!" I seem to recall you were using a decimal extended precision library for Kalles Fraktaler. Is that still the case? I wonder how much of a speedup Fractal Extreme's SSE2 extended precision would make? Not much because KF doesn't spend much time calculating reference points at full precision? Title: Re: Fractal Extreme updated, 4K video Post by: Kalles Fraktaler on January 30, 2016, 07:18:50 PM The full precision calculations in Kalles Fraktaler is much slower than in FX and MM. So it is lucky that few pixels need full precision. Hardware 80-bit long double is used from 1e600 and an own data type is used beyond 1e4900. I assume the render mentioned by Bruce was made on a SIMD enabled machine so that was used for his render? |