Paolo Bonzini wrote: > >>> Some programs, like 'msgmerge' from GNU gettext, already pay >>> attention to the OMP_NUM_THREADS variable - a convention shared >>> by all programs that rely on OpenMP. Can you make the 'sort' >>> program use the same convention? >> >> I am not working on the multi-threaded sort, but if somebody asks I can >> make it read OMP_NUM_THREADS. >> If is is already used by other GNU programs, then it seems a good idea >> to use this value when --threads is not specified on the command line. > > I agree. This also implies that no OMP_NUM_THREADS and no --threads > _will_ activate threading by default. > > Of course this should only apply if its effect is not externally > observable; if I have a very small file B and a very large file A, and I > can get > > $ md5sum --threads A B > abcdabcdabcdabcdabcdabcdabcdabcd B > 12341234123412341234123412341234 A > > Then the option would be necessary.
Good point Paolo. I think that's another argument for splitting separate files to different threads. cheers, Pádraig.
