Hi All- I was playing with this last night (don't normally compile on the mac) and found that using homebrew's llvm 3.8.1 seems to compile fine with -fopenmp. Running some OMP test code from https://gist.github.com/sethhillbrand/45dfb50e5a1865ad65bda1d6522778c5 shows expected result of 4 threads. I didn't get OpenMP errors when compiling KiCad although I didn't really notice a substantial difference in speed for the quick tests I was running. Maybe with more involved operations.
I'm not sure if this will require us to distribute a different libstdc++ with KiCad. Probably. Does that seem feasible to the packing team? -S 2018-03-01 7:23 GMT-08:00 Bernhard Stegmaier <stegma...@sw-systems.de>: > Hmm? > You keep everything as is (especially creating threads), but just put the > “#pragma …” before the for-loop. > So, there is one thread for the progress and one for the workers. > In the workers thread OpenMP (if there) takes care of adding additional > threads for parallelising the loop? > > Or, am I wrong with that? > > > On 1. Mar 2018, at 16:11, Jeff Young <j...@rokeby.ie> wrote: > > > > But then the progress reporter won’t work (and you’ve got no way to > cancel). > > > > Non-pooling parallel threads are sufficient for zone filling, aren’t > they? > > > > > >> On 1 Mar 2018, at 15:00, Bernhard Stegmaier <stegma...@sw-systems.de> > wrote: > >> > >> For now it would probably be fine to just restore the pragma for the > for loop optimisation. > >> Mac users are used to work single-threaded, all others would get back > multithreading here. > >> > >>> On 1. Mar 2018, at 15:58, Tomasz Wlostowski <tomasz.wlostow...@cern.ch> > wrote: > >>> > >>> On 01/03/18 15:43, Jeff Young wrote: > >>>> The purpose is it works on Mac. > >>>> > >>>> But it does appear I misread the std::max( omp_get_num_procs(), 2 ) > part. > >>>> > >>> > >>> Thanks Jeff! > >>> > >>> Be aware that neither std::thread nor std::async have any concept of > >>> thread pooling - we need to look for a suitable library or write or > own. > >>> > >>> Cheers, > >>> Tom > >>> > >>> _______________________________________________ > >>> 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 > >> > > > > > _______________________________________________ > 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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