[mpich-discuss] nemesis on powerpc64?

[Martin Siegert]

Hi,

I am trying to compile mpich2-1.1.1p1 with
--with-device=ch3:nemesis
on a PowerPC 64bit Linux system using CC="gcc -m64" and FC="xlf -q64".

configure fails with
configure: error:
The nemesis channel was selected yet no native atomic primitives are
available on this platform.  OpenPA can emulate atomic primitives using
locks by specifying --with-atomic-primitives=no but performance will be
very poor.  This override should only be specified for correctness
testing purposes.

and src/openpa/config.log contains

onfigure:6160: checking for support for gcc PowerPC atomics
configure:6223: gcc -m64 -o conftest -O3 -mcpu=970 -mtune=970 -maltivec -I./src -I/usr/local/src/mpich2-1.1.1p1/src/openpa/src -I/usr/local/src/mpich2-1.1.1p1/src/openpa/src -DUSE_PROCESS_LOCKS  conftest.c -lpthread  -lpthread >&5
In file included from conftest.c:41:
src/primitives/opa_gcc_ppc.h: In function `OPA_LL_ptr':
src/primitives/opa_gcc_ppc.h:80: error: duplicate case value
src/primitives/opa_gcc_ppc.h:80: error: previously used here
src/primitives/opa_gcc_ppc.h:82: warning: cast to pointer from integer of different size
src/primitives/opa_gcc_ppc.h: In function `OPA_SC_ptr':
src/primitives/opa_gcc_ppc.h:90: error: duplicate case value
src/primitives/opa_gcc_ppc.h:90: error: previously used here
src/primitives/opa_gcc_ppc.h:92: warning: cast from pointer to integer of different size
configure:6230: $? = 1

Line 80 in opa_gcc_ppc.h is:

OPA_COMPILE_TIME_ASSERT(sizeof(int) == sizeof(void *));

I am not sure whether I am interpreting this correctly, but this looks
to me as if this fails if sizeof(int) != sizeof(void *), i.e., on any
64bit platform.

Is there a fix for this?

Thanks!

Cheers,
Martin

-- 
Martin Siegert
Head, Research Computing
WestGrid Site Lead
IT Services                                phone: 778 782-4691
Simon Fraser University                    fax:   778 782-4242
Burnaby, British Columbia                  email: siegert at sfu.ca
Canada  V5A 1S6