Wouldn't it make sense to check for OMP and enable it if it's found? I'm currently looking into autoconf to figure out a way to do this. Are you willing to take the patch if I do that?
Regards, Elias On 4 April 2014 22:30, Juergen Sauermann <juergen.sauerm...@t-online.de>wrote: > Hi Elias, > > if you ./configure nothing then MULTICORE will be #undef'ed and that > means OMP will be disabled. This is the default for backward compatibility > so that GNU APL still compiles even if you don't have OMP installed. > > For the behavior that you expect below, > > .,/configure CORE_COUNT_WANTED=all > > is the way to go. > > /// Jürgen > > > > On 04/04/2014 04:15 PM, Elias Mårtenson wrote: > > Cool, thanks for this! > > Can you clarify one thing: If you don't specify anything on the command > line, and also not specify anything at runtime, what will the default be? > > Casually, I'd expect it to be set to OMP enabled, with the core count = > the number of cores on the machine. > > Regards, > Elias > > > On 4 April 2014 21:58, Juergen Sauermann > <juergen.sauerm...@t-online.de>wrote: > >> Hi, >> >> I have added a few functions to support multi-core/open MP programming >> for GNU APL, (see SVN 184. >> >> 1. ./configure >> >> You can now ./configure static and dynamic core counts: >> >> >> ./configure CORE_COUNT_WANTED=N with N>0 >> >> static maximum core count. Will >> >> #define MULTICORE 1 >> #define STATIC_CORE_COUNT N >> >> >> ./configure CORE_COUNT_WANTED=0 >> >> no openMP support. Will >> >> #undef MULTICORE >> #define STATIC_CORE_COUNT 1 >> >> >> ./configure CORE_COUNT_WANTED=-1 or =all >> >> dynamic core count using all available cores. Will >> >> #define MULTICORE 1 >> #undef STATIC_CORE_COUNT >> >> >> ./configure CORE_COUNT_WANTED=-2 or =argv >> >> dynamic core count set by command line option --cc N. >> Same as =all if --cc is not given. Will >> >> #define MULTICORE 1 >> #undef STATIC_CORE_COUNT >> >> >> ./configure CORE_COUNT_WANTED=-3 or =syl >> >> dynamic core count set in APL by ⎕SYL Will >> >> #define MULTICORE 1 >> #undef STATIC_CORE_COUNT >> >> The interpreter is started with core count 1. >> Eg. ⎕SYL[26]←2 will set core count to 2. >> >> ⎕SYL[24;] is the core count used in in ./configure (read-only) >> ⎕SYL[25;] is the core count detected by pthread_getaffinity_np() >> (read-only) >> ⎕SYL[26;] is the current core count (read-only unless >> CORE_COUNT_WANTED=syl) >> >> >> --------------------------------------------------------------------------------- >> >> In the interpreter code, the above #defines become available by: >> >> #include "Common.hh" >> >> That also declares the following functions/macros: >> >> CoreCount core_count() // return number of cores that will be used >> CoreCount max_cores() // return number of cores detected by >> pthread_getaffinity_np() >> CoreCount setup_cores(CoreCount new_count) // set new core count, return >> min ( new_count, max_cores ) >> >> if STATIC_CORE_COUNT is #defined then core_count() is a macro expanding >> to max ( CORE_COUNT_WANTED, 1). >> In that case, max_cores() cores will be used and not core_count() cores! >> >> ./configure checks for presence of omp.h and libgomp and sets CXX flags >> in Makefiles. >> >> omp.h is #included by Common.hh if present and needed (ie. if MULTICORE >> is 1) >> >> >> /// Jürgen >> >> >> >> >> > >
