"Matt Kitcat" <m...@elmtreecottages.co.uk> writes: > So I have done some very rough testing on an intel i5 4 core machine with an > Nvidia gt610 graphics card and 8 gb ram on Fedora 21 64 bit. > > To render a canon 40D raw file to openEXR 2900 pixel wide 2:235 aspect crop > with a default base curve it takes about 3.5 seconds with opencl=false in > darktablerc. > Weirdly it takes longer with opencl=true.
I'm not so surprised. I'm having a ~4X speedup with my graphics card compared to an i5, and according to http://gpuboss.com/gpus/Radeon-R9-270X-vs-GeForce-GT-610 it's 18X faster than yours for floating-point performance. If your goal is to maximize the performance for a batch with many images, I guess the optimal would still be to run a few images with OpenCL and the others on your CPU, to use both at the same time. But ultimately, if you want something really fast, you'll have to invest in a better GPU. -- Matthieu Moy http://www-verimag.imag.fr/~moy/ ------------------------------------------------------------------------------ Dive into the World of Parallel Programming The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/ _______________________________________________ Darktable-users mailing list Darktable-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/darktable-users
