Try building MPICH with GCC, for which I know a POWER7 version exists. GCC supports inline asm properly and you can use the resulting library with XLC codes, thanks to the beauty of C ABI interoperability. For Fortran, use CC=gcc, FC=xlf_r. Best, Jeff On Friday, January 23, 2015, "Antonio J. Peña" <[email protected]> wrote:

Hi Victor,

Most likely your hardware or compiler does not support atomic memory access. Unfortunately, our IB netmod uses these builtin functions. If you have Mellanox InfiniBand, you can give a try to the MXM netmod.

Best, Antonio

On 01/23/2015 05:04 AM, Victor Vysotskiy wrote:

Hi,

I am trying to compile the latest MPICH3 snapshot on Power7/Linux platform by using the XLF/XLC compiler suite v14.1. The cluster is equipped with common IB hardware. Unfortunately, the compilation failed with the following error message:

lib/.libs/libmpi.a(lib_libmpi_la-ib_poll.o): In function `MPID_nem_ib_drain_scq':

src/mpid/ch3/channels/nemesis/netmod/ib/ib_poll.c:(.text+0x5bc4): undefined reference to `__builtin_ctz'

src/mpid/ch3/channels/nemesis/netmod/ib/ib_poll.c:(.text+0x5e90): undefined reference to `__builtin_ctz'

lib/.libs/libmpi.a(lib_libmpi_la-ib_poll.o): In function `MPID_nem_ib_cm_drain_scq$AF227_75':

src/mpid/ch3/channels/nemesis/netmod/ib/ib_poll.c:(.text+0x7d7c): undefined reference to `__builtin_ctz'

src/mpid/ch3/channels/nemesis/netmod/ib/ib_poll.c:(.text+0x7e14): undefined reference to `__builtin_ctz'

src/mpid/ch3/channels/nemesis/netmod/ib/ib_poll.c:(.text+0x8040): undefined reference to `__builtin_ctz'

lib/.libs/libmpi.a(lib_libmpi_la-ib_poll.o):src/mpid/ch3/channels/nemesis/netmod/ib/ib_poll.c:(.text+0x814c): more undefined references to `__builtin_ctz' follow

For the configure's options used please check the attached 'config.power7.linux.log' file.

In addition, the IBM compiler produces few warnings:

#1

"src/mpid/ch3/channels/nemesis/netmod/ib/ib_ibcom.h", line 169.39: 1506-1147 (W) The asm constraint "a" is not supported.

"src/mpid/ch3/channels/nemesis/netmod/ib/ib_ibcom.h", line 169.49: 1506-1147 (W) The asm constraint "d" is not supported.

"src/mpid/ch3/channels/nemesis/netmod/ib/ib_reg_mr.c", line 89.12: 1506-1332 (W) A function with return type "void" may not return a value of type "void".

1500-064: (W) The register name %rax is unknown.

1500-064: (W) The register name %rbx is unknown.

1500-064: (W) The register name %rcx is unknown.

1500-064: (W) The register name %rdx is unknown.

#2

"/usr/include/bits/mman.h", line 45.9: 1506-236 (W) Macro name MAP_SHARED has been redefined.

"/usr/include/bits/mman.h", line 45.9: 1506-358 (I) "MAP_SHARED" is defined on line 17 of /usr/include/asm-generic/mman-common.h.

"/usr/include/bits/mman.h", line 46.9: 1506-236 (W) Macro name MAP_PRIVATE has been redefined.

"/usr/include/bits/mman.h", line 46.9: 1506-358 (I) "MAP_PRIVATE" is defined on line 18 of /usr/include/asm-generic/mman-common.h.

"/usr/include/bits/mman.h", line 48.10: 1506-236 (W) Macro name MAP_TYPE has been redefined.

"/usr/include/bits/mman.h", line 48.10: 1506-358 (I) "MAP_TYPE" is defined on line 19 of /usr/include/asm-generic/mman-common.h.

"/usr/include/bits/mman.h", line 52.9: 1506-236 (W) Macro name MAP_FIXED has been redefined.

"/usr/include/bits/mman.h", line 52.9: 1506-358 (I) "MAP_FIXED" is defined on line 20 of /usr/include/asm-generic/mman-common.h.

"/usr/include/bits/mman.h", line 54.10: 1506-236 (W) Macro name MAP_FILE has been redefined.

"/usr/include/bits/mman.h", line 54.10: 1506-358 (I) "MAP_FILE" is defined on line 43 of /usr/include/asm-generic/mman-common.h.

"/usr/include/bits/mman.h", line 55.10: 1506-236 (W) Macro name MAP_ANONYMOUS has been redefined.

"/usr/include/bits/mman.h", line 55.10: 1506-358 (I) "MAP_ANONYMOUS" is defined on line 21 of /usr/include/asm-generic/mman-common.h.

"/usr/include/bits/mman.h", line 61.10: 1506-236 (W) Macro name MAP_GROWSDOWN has been redefined.

"/usr/include/bits/mman.h", line 61.10: 1506-358 (I) "MAP_GROWSDOWN" is defined on line 19 of /usr/include/asm/mman.h.

"/usr/include/bits/mman.h", line 62.10: 1506-236 (W) Macro name MAP_DENYWRITE has been redefined.

"/usr/include/bits/mman.h", line 62.10: 1506-358 (I) "MAP_DENYWRITE" is defined on line 20 of /usr/include/asm/mman.h.

"/usr/include/bits/mman.h", line 63.10: 1506-236 (W) Macro name MAP_EXECUTABLE has been redefined.

"/usr/include/bits/mman.h", line 63.10: 1506-358 (I) "MAP_EXECUTABLE" is defined on line 21 of /usr/include/asm/mman.h.

"/usr/include/bits/mman.h", line 64.10: 1506-236 (W) Macro name MAP_LOCKED has been redefined.

"/usr/include/bits/mman.h", line 64.10: 1506-358 (I) "MAP_LOCKED" is defined on line 17 of /usr/include/asm/mman.h.

"/usr/include/bits/mman.h", line 65.10: 1506-236 (W) Macro name MAP_NORESERVE has been redefined.

"/usr/include/bits/mman.h", line 65.10: 1506-358 (I) "MAP_NORESERVE" is defined on line 16 of /usr/include/asm/mman.h.

"/usr/include/bits/mman.h", line 66.10: 1506-236 (W) Macro name MAP_POPULATE has been redefined.

"/usr/include/bits/mman.h", line 66.10: 1506-358 (I) "MAP_POPULATE" is defined on line 26 of /usr/include/asm/mman.h.

Is the error message related to the warnings observed? Or, I simply should avoid using the nemesis:ib channel?

With best regards,

Victor.

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