Oops, forgot the link: http://git.savannah.gnu.org/gitweb/?p=autoconf-archive.git;a=blob_plain;f=m4/ax_openmp.m4
Regards, Elias On 4 April 2014 22:53, Elias Mårtenson <loke...@gmail.com> wrote: > OK, I understand. > > I did find this, which is probably a good thing to use. It includes the > correct detection mechanism for Solaris as well. > > Regards, > Elias > > > On 4 April 2014 22:50, Juergen Sauermann <juergen.sauerm...@t-online.de>wrote: > >> Hi, >> >> maybe later if the stuff is more stable. The autoconf checks are >> already there, its just a matter of changing the default later on. >> >> /// Jürgen >> >> >> >> On 04/04/2014 04:31 PM, Elias Mårtenson wrote: >> >> 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 >>>> >>>> >>>> >>>> >>>> >>> >>> >> >> >
