Ron -- Many thanks! Leif -- can you comment on this? (yes, I'm passing the buck to our ARM Open MPI representative :-) )
On Feb 26, 2012, at 1:22 PM, Ron Broberg wrote: > I would like to report the following information regarding compiling OpenMPI > on Debian ARMv6. I won't submit this as a patch because I don't believe that > "delete all 'dmb' instructions" can be considered a well developed patch. But > this information may be of use to someone down the line. > > I was able to compile the upstream openmpi-1.5.4 distribution on a Debian6 > armv6l qemu emulation. > http://www.open-mpi.org/software/ompi/v1.4/downloads/openmpi-1.4.5.tar.bz2 > > > You have to make 3 changes to the package > 1) Delete all references to the RISC instruction 'dmb' > 2) Modify the 'configure' file to include an 'armv6' option > 3) Compile with CFLAGS=-march=armv6 > > ## 1) make the following edits to these three files > ./opal/asm/generated/atomic-local.s > delete all dmb instructions > ./opal/asm/base/ARM.asm > delete all dmb instructions > ./opal/include/opal/sys/arm/atomic.h > change the lines: > #if OPAL_WANT_SMP_LOCKS > #define MB() __asm__ __volatile__ ("dmb" : : : "memory") > #define RMB() __asm__ __volatile__ ("dmb" : : : "memory") > #define WMB() __asm__ __volatile__ ("dmb" : : : "memory") > #else > #define MB() > #define RMB() > #define WMB() > #endif > > to read: > #define MB() > #define RMB() > #define WMB() > > ## 2) add the following to the 'configure' file at line 26946 of 171183 > goto line 26946, there should be an 'alpha-' section above and an 'armv7' > below > insert the following > armv6*) > ompi_cv_asm_arch="ARM" > OPAL_ASM_SUPPORT_64BIT=0 > OMPI_GCC_INLINE_ASSIGN='"mov %0, #0" : "=&r"(ret)' > ;; > > ## 3) compile and install with the following CFLAGS > CFLAGS=-march=armv6 > ./configure CFLAGS=-march=armv6 > make > sudo make install > > more information about my build at > http://rhinohide.wordpress.com/2012/02/26/openmpi-on-raspberry-pi/ > > > _______________________________________________ > devel mailing list > de...@open-mpi.org > http://www.open-mpi.org/mailman/listinfo.cgi/devel -- Jeff Squyres jsquy...@cisco.com For corporate legal information go to: http://www.cisco.com/web/about/doing_business/legal/cri/
