I read the small section about it in the wiki and have seen your outcome. Having experience with not only OpenMP but threading/multiprocessing in general (OpenCL, OpenMPI and GoRoutines), I will give the code a look. I'll then let you know if I give it a go.
Regards, Carl On Mon, Jan 13, 2014 at 3:04 AM, Maciej Sumiński <maciej.sumin...@cern.ch>wrote: > On 01/10/2014 08:45 PM, Vesa Solonen wrote: > >> 10/01/14 19:35, Maciej Sumiński kirjoitti: >> >> the board that I recommended for testing the GAL >>> (http://www.ohwr.org/attachments/download/2187/wrs.kicad_pcb), when you >>> drag the biggest IC in the middle, as it contains the greatest number of >>> nets connected. After being dropped you may observe a freeze for a short >>> time, it is the ratsnest algorithm going - we have to decide if it is >>> acceptable. >>> >> >> While the big redesign/rewrite of Kicad core is going on, it might be a >> good moment to think some radical moves. Designing all computationally >> intensive parts with multi core processors, de facto available >> SIMD/Vector instructions and OpenCL in mind. >> >> As an example instruct the compiler to autovectorize just that ratsnest >> calculation. Or the previous plus function written to support multiple >> threads. Running the UI thread and processing threads separate, say the >> ratsnest being constantly iterated in the background when it changes. >> >> Just by GCC autovectorization its easy to get ten times more comparing >> or multiplying performane. >> >> -Vesa >> > > I fully support the idea, in fact I have dreamed about this too ( > http://www.ohwr.org/projects/cern-kicad/wiki/ratsnest-gal# > Possible-upgrades). I had a short try with OpenMP, but I did not get any > better results, so it seems that I could have done it wrong. > If there are volunteers who have some experience with parallelization I am > very eager to cooperate to speed up some of computations. The ratsnest > algorithm is a perfect place to start with. It is performed on per net > basis, so they are all independent to each other. > > Regards, > Orson > > _______________________________________________ > Mailing list: https://launchpad.net/~kicad-developers > Post to : kicad-developers@lists.launchpad.net > Unsubscribe : https://launchpad.net/~kicad-developers > More help : https://help.launchpad.net/ListHelp >
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