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[svn-r11939] Purpose:

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Supports for collective chunk IO inside parallel HDF5

Description:
Added a macro hdf5_mpi_special_collective_io_works to filter out
          some mpi-io packages that don't support collective IO for no IO
          contributions in some processes.

Solution:
Using AC_CACHE_VAL to do the job.

Platforms tested:
Parallel:

IBM AIX 5.2(copper)
Linux (heping) mpich-1.2.6
SDSC Teragrid mpich-1.2.5
Linux(Tungsten) mpich-1.2.6
Altix(NCSA cobalt)

Seq:
Linux(heping)

Misc. update:
This commit is contained in:
MuQun Yang 2006-02-16 11:45:42 -05:00
parent 811131397c
commit bac54105f6
2 changed files with 46 additions and 1 deletions
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23
configure vendored
View File

@ -50023,6 +50023,29 @@ else
echo "$as_me:$LINENO: result: no" >&5
echo "${ECHO_T}no" >&6
fi
echo "$as_me:$LINENO: checking if MPI-IO can do collective IO when one or more processes don't do IOs" >&5
echo $ECHO_N "checking if MPI-IO can do collective IO when one or more processes don't do IOs... $ECHO_C" >&6
if test "${hdf5_mpi_special_collective_io_works+set}" = set; then
echo $ECHO_N "(cached) $ECHO_C" >&6
else
hdf5_mpi_special_collective_io_works=yes
fi
if test ${hdf5_mpi_special_collective_io_works} = "yes"; then
cat >>confdefs.h <<\_ACEOF
#define MPI_SPECIAL_COLLECTIVE_IO_WORKS 1
_ACEOF
echo "$as_me:$LINENO: result: yes" >&5
echo "${ECHO_T}yes" >&6
else
echo "$as_me:$LINENO: result: no" >&5
echo "${ECHO_T}no" >&6
fi
fi

24
configure.in
View File

@ -2383,9 +2383,13 @@ if test -n "$PARALLEL"; then
dnl ----------------------------------------------------------------------
dnl Check to see whether the complicate MPI derived datatype works.
dnl Up to now(Dec. 20th, 2004), we find that IBM's MPIO implemention doesn't
dnl In Dec. 20th, 2004, we found that IBM's MPIO implemention didn't
dnl handle with the displacement of the complicate MPI type derived datatype
dnl correctly. So we add the check here.
dnl IBM fixed this bug in their new version that supported MPI-IO around spring 2005.
dnl We find that mpich 1.2.5 has the similar bug. The same
dnl bug also occurs at SGI IRIX 6.5 C with compiler version lower than or equal to 7.3.
dnl In case people still use the old compiler, we keep this flag.
AC_MSG_CHECKING([if irregular hyperslab optimization code works inside MPI-IO])
AC_CACHE_VAL([hdf5_mpi_complex_derived_datatype_works],[hdf5_mpi_complex_derived_datatype_works=yes])
@ -2397,6 +2401,24 @@ if test ${hdf5_mpi_complex_derived_datatype_works} = "yes"; then
else
AC_MSG_RESULT([no])
fi
dnl ----------------------------------------------------------------------
dnl Check to see whether MPI-IO can do collective IO successfully when one or more processes don't do
dnl any IOs.
dnl Up to now(Feb. 8th, 2006), we find that it will cause program hung with mpich 1.2.x version
dnl and SGI altix. For those systems, we have to turn off this feature and use independent IO instead.
dnl
AC_MSG_CHECKING([if MPI-IO can do collective IO when one or more processes don't do IOs])
AC_CACHE_VAL([hdf5_mpi_special_collective_io_works],[hdf5_mpi_special_collective_io_works=yes])
if test ${hdf5_mpi_special_collective_io_works} = "yes"; then
AC_DEFINE([MPI_SPECIAL_COLLECTIVE_IO_WORKS], [1],
[Define if your system can handle special collective IO properly.])
AC_MSG_RESULT([yes])
else
AC_MSG_RESULT([no])
fi
fi
dnl ----------------------------------------------------------------------