Thank you mate. This patch works quite well on my Raspberry Pi w/o any error. Can we put them in the upstream?
Thanks. Eric On Mon, Jan 21, 2013 at 12:07 AM, George Bosilca <bosi...@icl.utk.edu> wrote: > Eric, > > What do you think about the patch attached to ticket #3469 > (https://svn.open-mpi.org/trac/ompi/ticket/3469). We might blend the two > patches together, and have all the different ARM versions covered. > > Thanks, > George. > > On Jan 20, 2013, at 05:55 , Lee Eric <openlinuxsou...@gmail.com> wrote: > >> Hi, >> >> The above issue fixed w/ this patch I used: >> https://raw.github.com/sebhtml/patches/master/openmpi/Raspberry-Pi-openmpi-1.6.2.patch >> >> Is that possible OpenMPI can contain this patch in the future? >> >> Thanks. >> >> On Sun, Jan 20, 2013 at 3:13 AM, Lee Eric <openlinuxsou...@gmail.com> wrote: >>> Hi, >>> >>> I just use --disable-mpif77 and --disable-mpif90 to let configure run >>> well. However, I know it's only tough workround. After configured >>> well, I encounter following error when run make: >>> >>> Making all in config >>> make[1]: Entering directory `/home/huli/Projects/openmpi-1.6.3/config' >>> make[1]: Nothing to be done for `all'. >>> make[1]: Leaving directory `/home/huli/Projects/openmpi-1.6.3/config' >>> Making all in contrib >>> make[1]: Entering directory `/home/huli/Projects/openmpi-1.6.3/contrib' >>> make[1]: Nothing to be done for `all'. >>> make[1]: Leaving directory `/home/huli/Projects/openmpi-1.6.3/contrib' >>> Making all in opal >>> make[1]: Entering directory `/home/huli/Projects/openmpi-1.6.3/opal' >>> Making all in include >>> make[2]: Entering directory `/home/huli/Projects/openmpi-1.6.3/opal/include' >>> make all-am >>> make[3]: Entering directory `/home/huli/Projects/openmpi-1.6.3/opal/include' >>> make[3]: Leaving directory `/home/huli/Projects/openmpi-1.6.3/opal/include' >>> make[2]: Leaving directory `/home/huli/Projects/openmpi-1.6.3/opal/include' >>> Making all in libltdl >>> make[2]: Entering directory `/home/huli/Projects/openmpi-1.6.3/opal/libltdl' >>> make all-am >>> make[3]: Entering directory `/home/huli/Projects/openmpi-1.6.3/opal/libltdl' >>> /bin/sh ./libtool --tag=CC --mode=compile >>> armv6-rpi-linux-gnueabi-gcc -DHAVE_CONFIG_H -I. >>> -DLT_CONFIG_H='<config.h>' -DLTDL -I. -I. -Ilibltdl -I./libltdl >>> -I./libltdl >>> -I/home/huli/Projects/openmpi-1.6.3/opal/mca/hwloc/hwloc132/hwloc/include >>> -I/usr/include/infiniband -I/usr/include/infiniband -Ofast >>> -mfpu=vfp -mfloat-abi=hard -MT dlopen.lo -MD -MP -MF .deps/dlopen.Tpo >>> -c -o dlopen.lo `test -f 'loaders/dlopen.c' || echo >>> './'`loaders/dlopen.c >>> /bin/sh ./libtool --tag=CC --mode=compile >>> armv6-rpi-linux-gnueabi-gcc -DHAVE_CONFIG_H -I. -DLTDLOPEN=libltdlc >>> -DLT_CONFIG_H='<config.h>' -DLTDL -I. -I. -Ilibltdl -I./libltdl >>> -I./libltdl >>> -I/home/huli/Projects/openmpi-1.6.3/opal/mca/hwloc/hwloc132/hwloc/include >>> -I/usr/include/infiniband -I/usr/include/infiniband -Ofast >>> -mfpu=vfp -mfloat-abi=hard -MT libltdlc_la-preopen.lo -MD -MP -MF >>> .deps/libltdlc_la-preopen.Tpo -c -o libltdlc_la-preopen.lo `test -f >>> 'loaders/preopen.c' || echo './'`loaders/preopen.c >>> /bin/sh ./libtool --tag=CC --mode=compile >>> armv6-rpi-linux-gnueabi-gcc -DHAVE_CONFIG_H -I. -DLTDLOPEN=libltdlc >>> -DLT_CONFIG_H='<config.h>' -DLTDL -I. -I. -Ilibltdl -I./libltdl >>> -I./libltdl >>> -I/home/huli/Projects/openmpi-1.6.3/opal/mca/hwloc/hwloc132/hwloc/include >>> -I/usr/include/infiniband -I/usr/include/infiniband -Ofast >>> -mfpu=vfp -mfloat-abi=hard -MT libltdlc_la-lt__alloc.lo -MD -MP -MF >>> .deps/libltdlc_la-lt__alloc.Tpo -c -o libltdlc_la-lt__alloc.lo `test >>> -f 'lt__alloc.c' || echo './'`lt__alloc.c >>> /bin/sh ./libtool --tag=CC --mode=compile >>> armv6-rpi-linux-gnueabi-gcc -DHAVE_CONFIG_H -I. -DLTDLOPEN=libltdlc >>> -DLT_CONFIG_H='<config.h>' -DLTDL -I. -I. -Ilibltdl -I./libltdl >>> -I./libltdl >>> -I/home/huli/Projects/openmpi-1.6.3/opal/mca/hwloc/hwloc132/hwloc/include >>> -I/usr/include/infiniband -I/usr/include/infiniband -Ofast >>> -mfpu=vfp -mfloat-abi=hard -MT libltdlc_la-lt_dlloader.lo -MD -MP -MF >>> .deps/libltdlc_la-lt_dlloader.Tpo -c -o libltdlc_la-lt_dlloader.lo >>> `test -f 'lt_dlloader.c' || echo './'`lt_dlloader.c >>> /bin/sh ./libtool --tag=CC --mode=compile >>> armv6-rpi-linux-gnueabi-gcc -DHAVE_CONFIG_H -I. -DLTDLOPEN=libltdlc >>> -DLT_CONFIG_H='<config.h>' -DLTDL -I. -I. -Ilibltdl -I./libltdl >>> -I./libltdl >>> -I/home/huli/Projects/openmpi-1.6.3/opal/mca/hwloc/hwloc132/hwloc/include >>> -I/usr/include/infiniband -I/usr/include/infiniband -Ofast >>> -mfpu=vfp -mfloat-abi=hard -MT libltdlc_la-lt_error.lo -MD -MP -MF >>> .deps/libltdlc_la-lt_error.Tpo -c -o libltdlc_la-lt_error.lo `test -f >>> 'lt_error.c' || echo './'`lt_error.c >>> /bin/sh ./libtool --tag=CC --mode=compile >>> armv6-rpi-linux-gnueabi-gcc -DHAVE_CONFIG_H -I. -DLTDLOPEN=libltdlc >>> -DLT_CONFIG_H='<config.h>' -DLTDL -I. -I. -Ilibltdl -I./libltdl >>> -I./libltdl >>> -I/home/huli/Projects/openmpi-1.6.3/opal/mca/hwloc/hwloc132/hwloc/include >>> -I/usr/include/infiniband -I/usr/include/infiniband -Ofast >>> -mfpu=vfp -mfloat-abi=hard -MT libltdlc_la-ltdl.lo -MD -MP -MF >>> .deps/libltdlc_la-ltdl.Tpo -c -o libltdlc_la-ltdl.lo `test -f 'ltdl.c' >>> || echo './'`ltdl.c >>> /bin/sh ./libtool --tag=CC --mode=compile >>> armv6-rpi-linux-gnueabi-gcc -DHAVE_CONFIG_H -I. -DLTDLOPEN=libltdlc >>> -DLT_CONFIG_H='<config.h>' -DLTDL -I. -I. -Ilibltdl -I./libltdl >>> -I./libltdl >>> -I/home/huli/Projects/openmpi-1.6.3/opal/mca/hwloc/hwloc132/hwloc/include >>> -I/usr/include/infiniband -I/usr/include/infiniband -Ofast >>> -mfpu=vfp -mfloat-abi=hard -MT libltdlc_la-slist.lo -MD -MP -MF >>> .deps/libltdlc_la-slist.Tpo -c -o libltdlc_la-slist.lo `test -f >>> 'slist.c' || echo './'`slist.c >>> /bin/sh ./libtool --tag=CC --mode=compile >>> armv6-rpi-linux-gnueabi-gcc -DHAVE_CONFIG_H -I. >>> -DLT_CONFIG_H='<config.h>' -DLTDL -I. -I. -Ilibltdl -I./libltdl >>> -I./libltdl >>> -I/home/huli/Projects/openmpi-1.6.3/opal/mca/hwloc/hwloc132/hwloc/include >>> -I/usr/include/infiniband -I/usr/include/infiniband -Ofast >>> -mfpu=vfp -mfloat-abi=hard -MT lt__strl.lo -MD -MP -MF >>> .deps/lt__strl.Tpo -c -o lt__strl.lo lt__strl.c >>> libtool: compile: armv6-rpi-linux-gnueabi-gcc -DHAVE_CONFIG_H -I. >>> -DLTDLOPEN=libltdlc "-DLT_CONFIG_H=<config.h>" -DLTDL -I. -I. >>> -Ilibltdl -I./libltdl -I./libltdl >>> -I/home/huli/Projects/openmpi-1.6.3/opal/mca/hwloc/hwloc132/hwloc/include >>> -I/usr/include/infiniband -I/usr/include/infiniband -Ofast -mfpu=vfp >>> -mfloat-abi=hard -MT libltdlc_la-lt__alloc.lo -MD -MP -MF >>> .deps/libltdlc_la-lt__alloc.Tpo -c lt__alloc.c -fPIC -DPIC -o >>> .libs/libltdlc_la-lt__alloc.o >>> libtool: compile: armv6-rpi-linux-gnueabi-gcc -DHAVE_CONFIG_H -I. >>> -DLTDLOPEN=libltdlc "-DLT_CONFIG_H=<config.h>" -DLTDL -I. -I. >>> -Ilibltdl -I./libltdl -I./libltdl >>> -I/home/huli/Projects/openmpi-1.6.3/opal/mca/hwloc/hwloc132/hwloc/include >>> -I/usr/include/infiniband -I/usr/include/infiniband -Ofast -mfpu=vfp >>> -mfloat-abi=hard -MT libltdlc_la-preopen.lo -MD -MP -MF >>> .deps/libltdlc_la-preopen.Tpo -c loaders/preopen.c -fPIC -DPIC -o >>> .libs/libltdlc_la-preopen.o >>> libtool: compile: armv6-rpi-linux-gnueabi-gcc -DHAVE_CONFIG_H -I. >>> -DLTDLOPEN=libltdlc "-DLT_CONFIG_H=<config.h>" -DLTDL -I. -I. >>> -Ilibltdl -I./libltdl -I./libltdl >>> -I/home/huli/Projects/openmpi-1.6.3/opal/mca/hwloc/hwloc132/hwloc/include >>> -I/usr/include/infiniband -I/usr/include/infiniband -Ofast -mfpu=vfp >>> -mfloat-abi=hard -MT libltdlc_la-lt_error.lo -MD -MP -MF >>> .deps/libltdlc_la-lt_error.Tpo -c lt_error.c -fPIC -DPIC -o >>> .libs/libltdlc_la-lt_error.o >>> libtool: compile: armv6-rpi-linux-gnueabi-gcc -DHAVE_CONFIG_H -I. >>> "-DLT_CONFIG_H=<config.h>" -DLTDL -I. -I. -Ilibltdl -I./libltdl >>> -I./libltdl >>> -I/home/huli/Projects/openmpi-1.6.3/opal/mca/hwloc/hwloc132/hwloc/include >>> -I/usr/include/infiniband -I/usr/include/infiniband -Ofast -mfpu=vfp >>> -mfloat-abi=hard -MT lt__strl.lo -MD -MP -MF .deps/lt__strl.Tpo -c >>> lt__strl.c -fPIC -DPIC -o .libs/lt__strl.o >>> libtool: compile: armv6-rpi-linux-gnueabi-gcc -DHAVE_CONFIG_H -I. >>> "-DLT_CONFIG_H=<config.h>" -DLTDL -I. -I. -Ilibltdl -I./libltdl >>> -I./libltdl >>> -I/home/huli/Projects/openmpi-1.6.3/opal/mca/hwloc/hwloc132/hwloc/include >>> -I/usr/include/infiniband -I/usr/include/infiniband -Ofast -mfpu=vfp >>> -mfloat-abi=hard -MT dlopen.lo -MD -MP -MF .deps/dlopen.Tpo -c >>> loaders/dlopen.c -fPIC -DPIC -o .libs/dlopen.o >>> libtool: compile: armv6-rpi-linux-gnueabi-gcc -DHAVE_CONFIG_H -I. >>> -DLTDLOPEN=libltdlc "-DLT_CONFIG_H=<config.h>" -DLTDL -I. -I. >>> -Ilibltdl -I./libltdl -I./libltdl >>> -I/home/huli/Projects/openmpi-1.6.3/opal/mca/hwloc/hwloc132/hwloc/include >>> -I/usr/include/infiniband -I/usr/include/infiniband -Ofast -mfpu=vfp >>> -mfloat-abi=hard -MT libltdlc_la-lt_dlloader.lo -MD -MP -MF >>> .deps/libltdlc_la-lt_dlloader.Tpo -c lt_dlloader.c -fPIC -DPIC -o >>> .libs/libltdlc_la-lt_dlloader.o >>> libtool: compile: armv6-rpi-linux-gnueabi-gcc -DHAVE_CONFIG_H -I. >>> -DLTDLOPEN=libltdlc "-DLT_CONFIG_H=<config.h>" -DLTDL -I. -I. >>> -Ilibltdl -I./libltdl -I./libltdl >>> -I/home/huli/Projects/openmpi-1.6.3/opal/mca/hwloc/hwloc132/hwloc/include >>> -I/usr/include/infiniband -I/usr/include/infiniband -Ofast -mfpu=vfp >>> -mfloat-abi=hard -MT libltdlc_la-ltdl.lo -MD -MP -MF >>> .deps/libltdlc_la-ltdl.Tpo -c ltdl.c -fPIC -DPIC -o >>> .libs/libltdlc_la-ltdl.o >>> libtool: compile: armv6-rpi-linux-gnueabi-gcc -DHAVE_CONFIG_H -I. >>> -DLTDLOPEN=libltdlc "-DLT_CONFIG_H=<config.h>" -DLTDL -I. -I. >>> -Ilibltdl -I./libltdl -I./libltdl >>> -I/home/huli/Projects/openmpi-1.6.3/opal/mca/hwloc/hwloc132/hwloc/include >>> -I/usr/include/infiniband -I/usr/include/infiniband -Ofast -mfpu=vfp >>> -mfloat-abi=hard -MT libltdlc_la-slist.lo -MD -MP -MF >>> .deps/libltdlc_la-slist.Tpo -c slist.c -fPIC -DPIC -o >>> .libs/libltdlc_la-slist.o >>> mv -f .deps/dlopen.Tpo .deps/dlopen.Plo >>> /bin/sh ./libtool --tag=CC --mode=link armv6-rpi-linux-gnueabi-gcc >>> -Ofast -mfpu=vfp -mfloat-abi=hard -module -avoid-version -o dlopen.la >>> dlopen.lo -ldl -ldl -lrt -lnsl -lutil -lm >>> mv -f .deps/libltdlc_la-lt__alloc.Tpo .deps/libltdlc_la-lt__alloc.Plo >>> mv -f .deps/lt__strl.Tpo .deps/lt__strl.Plo >>> mv -f .deps/libltdlc_la-lt_error.Tpo .deps/libltdlc_la-lt_error.Plo >>> mv -f .deps/libltdlc_la-preopen.Tpo .deps/libltdlc_la-preopen.Plo >>> mv -f .deps/libltdlc_la-lt_dlloader.Tpo .deps/libltdlc_la-lt_dlloader.Plo >>> libtool: link: armv6-rpi-linux-gnueabi-ar cru .libs/dlopen.a .libs/dlopen.o >>> libtool: link: armv6-rpi-linux-gnueabi-ranlib .libs/dlopen.a >>> mv -f .deps/libltdlc_la-slist.Tpo .deps/libltdlc_la-slist.Plo >>> libtool: link: ( cd ".libs" && rm -f "dlopen.la" && ln -s >>> "../dlopen.la" "dlopen.la" ) >>> mv -f .deps/libltdlc_la-ltdl.Tpo .deps/libltdlc_la-ltdl.Plo >>> /bin/sh ./libtool --tag=CC --mode=link armv6-rpi-linux-gnueabi-gcc >>> -Ofast -mfpu=vfp -mfloat-abi=hard -no-undefined -dlpreopen dlopen.la >>> -o libltdlc.la libltdlc_la-preopen.lo libltdlc_la-lt__alloc.lo >>> libltdlc_la-lt_dlloader.lo libltdlc_la-lt_error.lo libltdlc_la-ltdl.lo >>> libltdlc_la-slist.lo lt__strl.lo -ldl -lrt -lnsl -lutil -lm >>> libtool: link: rm -f .libs/libltdlc.nm .libs/libltdlc.nmS .libs/libltdlc.nmT >>> libtool: link: (cd .libs && armv6-rpi-linux-gnueabi-gcc -Ofast >>> -mfpu=vfp -mfloat-abi=hard -c -fno-builtin -fPIC -DPIC "libltdlcS.c") >>> libtool: link: rm -f ".libs/libltdlcS.c" ".libs/libltdlc.nm" >>> ".libs/libltdlc.nmS" ".libs/libltdlc.nmT" >>> libtool: link: (cd .libs/libltdlc.lax/dlopen.a && >>> armv6-rpi-linux-gnueabi-ar x >>> "/home/huli/Projects/openmpi-1.6.3/opal/libltdl/./.libs/dlopen.a") >>> libtool: link: armv6-rpi-linux-gnueabi-ar cru .libs/libltdlc.a >>> .libs/libltdlc_la-preopen.o .libs/libltdlc_la-lt__alloc.o >>> .libs/libltdlc_la-lt_dlloader.o .libs/libltdlc_la-lt_error.o >>> .libs/libltdlc_la-ltdl.o .libs/libltdlc_la-slist.o .libs/lt__strl.o >>> .libs/libltdlcS.o .libs/libltdlc.lax/dlopen.a/dlopen.o >>> libtool: link: armv6-rpi-linux-gnueabi-ranlib .libs/libltdlc.a >>> libtool: link: rm -fr .libs/libltdlc.lax >>> libtool: link: ( cd ".libs" && rm -f "libltdlc.la" && ln -s >>> "../libltdlc.la" "libltdlc.la" ) >>> make[3]: Leaving directory `/home/huli/Projects/openmpi-1.6.3/opal/libltdl' >>> make[2]: Leaving directory `/home/huli/Projects/openmpi-1.6.3/opal/libltdl' >>> Making all in asm >>> make[2]: Entering directory `/home/huli/Projects/openmpi-1.6.3/opal/asm' >>> rm -f atomic-asm.S >>> CC asm.lo >>> ln -s "../../opal/asm/generated/atomic-local.s" atomic-asm.S >>> CPPAS atomic-asm.lo >>> atomic-asm.S: Assembler messages: >>> atomic-asm.S:7: Error: selected processor does not support ARM mode `dmb' >>> atomic-asm.S:15: Error: selected processor does not support ARM mode `dmb' >>> atomic-asm.S:23: Error: selected processor does not support ARM mode `dmb' >>> atomic-asm.S:55: Error: selected processor does not support ARM mode `dmb' >>> atomic-asm.S:70: Error: selected processor does not support ARM mode `dmb' >>> make[2]: *** [atomic-asm.lo] Error 1 >>> make[2]: *** Waiting for unfinished jobs.... >>> make[2]: Leaving directory `/home/huli/Projects/openmpi-1.6.3/opal/asm' >>> make[1]: *** [all-recursive] Error 1 >>> make[1]: Leaving directory `/home/huli/Projects/openmpi-1.6.3/opal' >>> make: *** [all-recursive] Error 1 >>> >>> Here's my toolchain's gcc details. >>> >>> [huli@localhost openmpi-1.6.3]$ armv6-rpi-linux-gnueabi-gcc -v >>> Using built-in specs. >>> COLLECT_GCC=armv6-rpi-linux-gnueabi-gcc >>> COLLECT_LTO_WRAPPER=/home/huli/Projects/arm-devel-rpi/libexec/gcc/arm-rpi-linux-gnueabi/4.7.3/lto-wrapper >>> Target: arm-rpi-linux-gnueabi >>> Configured with: >>> /home/huli/Projects/ct-rpi/.build/src/gcc-linaro-4.7-2012.10/configure >>> --build=x86_64-build_unknown-linux-gnu >>> --host=x86_64-build_unknown-linux-gnu --target=arm-rpi-linux-gnueabi >>> --prefix=/home/huli/Projects/arm-devel-rpi >>> --with-sysroot=/home/huli/Projects/arm-devel-rpi/arm-rpi-linux-gnueabi/sysroot >>> --enable-languages=c,c++,fortran --with-arch=armv6zk >>> --with-cpu=arm1176jzf-s --with-tune=arm1176jzf-s --with-fpu=vfp >>> --with-float=hard --with-pkgversion='crosstool-NG 1.17.0' >>> --enable-__cxa_atexit --disable-libmudflap --disable-libgomp >>> --disable-libssp --disable-libquadmath --disable-libquadmath-support >>> --with-gmp=/home/huli/Projects/ct-rpi/.build/arm-rpi-linux-gnueabi/buildtools >>> --with-mpfr=/home/huli/Projects/ct-rpi/.build/arm-rpi-linux-gnueabi/buildtools >>> --with-mpc=/home/huli/Projects/ct-rpi/.build/arm-rpi-linux-gnueabi/buildtools >>> --with-ppl=/home/huli/Projects/ct-rpi/.build/arm-rpi-linux-gnueabi/buildtools >>> --with-cloog=/home/huli/Projects/ct-rpi/.build/arm-rpi-linux-gnueabi/buildtools >>> --with-libelf=/home/huli/Projects/ct-rpi/.build/arm-rpi-linux-gnueabi/buildtools >>> --with-host-libstdcxx='-static-libgcc -Wl,-Bstatic,-lstdc++,-Bdynamic >>> -lm -L/home/huli/Projects/ct-rpi/.build/arm-rpi-linux-gnueabi/buildtools/lib >>> -lpwl' --enable-threads=posix --enable-target-optspace --disable-nls >>> --disable-multilib >>> --with-local-prefix=/home/huli/Projects/arm-devel-rpi/arm-rpi-linux-gnueabi/sysroot >>> --enable-c99 --enable-long-long --with-float=hard >>> Thread model: posix >>> gcc version 4.7.3 20121001 (prerelease) (crosstool-NG 1.17.0) >>> >>> Anyone have idea? >>> >>> Thanks. >>> >>> Eric >>> >>> On Sun, Jan 20, 2013 at 2:05 AM, Lee Eric <openlinuxsou...@gmail.com> wrote: >>>> Hi, >>>> >>>> The cross-compile issue I fixed. Check following source code: >>>> opal_config_asm.m4:897: [AC_MSG_ERROR([No atomic primitives available >>>> for $host])]) >>>> >>>> It seems that checks the toolchain's tuple is one of: armv7* or armv6* >>>> or armv5*. I have recompiled my toolchain and no such error occurred. >>>> However, I hit another issue about fortran as configure running. >>>> >>>> *** Fortran 90/95 compiler >>>> checking for armv6-rpi-linux-gnueabi-gfortran... >>>> armv6-rpi-linux-gnueabi-gfortran >>>> checking whether we are using the GNU Fortran compiler... yes >>>> checking whether armv6-rpi-linux-gnueabi-gfortran accepts -g... yes >>>> checking if Fortran 77 compiler works... links (cross compiling) >>>> checking armv6-rpi-linux-gnueabi-gfortran external symbol >>>> convention... single underscore >>>> checking if C and Fortran 77 are link compatible... yes >>>> checking to see if F77 compiler likes the C++ exception flags... >>>> skipped (no C++ exceptions flags) >>>> checking to see if mpif77/mpif90 compilers need additional linker flags... >>>> none >>>> checking if Fortran 77 compiler supports CHARACTER... yes >>>> checking size of Fortran 77 CHARACTER... configure: error: Can not >>>> determine size of CHARACTER when cross-compiling >>>> >>>> Any hint? Thanks. >>>> >>>> Eric >>>> >>>> On Sat, Jan 19, 2013 at 10:08 PM, Lee Eric <openlinuxsou...@gmail.com> >>>> wrote: >>>>> Any heads up? Thanks. >>>>> >>>>> On Fri, Jan 18, 2013 at 5:28 AM, Jeff Squyres (jsquyres) >>>>> <jsquy...@cisco.com> wrote: >>>>>> On Jan 16, 2013, at 6:41 AM, Leif Lindholm <leif.lindh...@arm.com> wrote: >>>>>> >>>>>>> That isn't, technically speaking, correct for the Raspberry Pi - but it >>>>>>> is a workaround if you know you will never actually use the asm >>>>>>> implementations of the atomics, but only the inline C ones.. >>>>>>> >>>>>>> This sort of hides the problem that the dedicated barrier instructions >>>>>>> were not available in ARMv6 (it used "system control coprocessor >>>>>>> operations" instead. >>>>>>> >>>>>>> If you ever executed the asm implementation, you would trigger an >>>>>>> undefined instruction exception on the Pi. >>>>>> >>>>>> Hah; sweet. Ok. >>>>>> >>>>>> So what's the right answer? Would it be acceptable to use a no-op for >>>>>> this operation on such architectures? >>>>>> >>>>>> -- >>>>>> Jeff Squyres >>>>>> jsquy...@cisco.com >>>>>> For corporate legal information go to: >>>>>> http://www.cisco.com/web/about/doing_business/legal/cri/ >>>>>> >>>>>> >>>>>> _______________________________________________ >>>>>> users mailing list >>>>>> us...@open-mpi.org >>>>>> http://www.open-mpi.org/mailman/listinfo.cgi/users >> _______________________________________________ >> users mailing list >> us...@open-mpi.org >> http://www.open-mpi.org/mailman/listinfo.cgi/users > > > _______________________________________________ > users mailing list > us...@open-mpi.org > http://www.open-mpi.org/mailman/listinfo.cgi/users
