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6262a14f2e
1. In H5Dwrite and H5Dread, let the data buffer point to a fake address if the application passes
in an empty buffer. This is mainly for MPIO programs that some processes may not have any
data to write or read but still participate the I/O. This solution solves some MPI's problem
like the ChaMPIon on tungsten which doesn't support empty buffer.
2. The ChaMPIon on tungsten doesn't support complex derived MPI data type correctly and collective
I/O when some processes don't have any data to write or read correctly. Detect the compiler
"cmpicc" in the system-specific config file and set the variables for these two cases to false.
The PHDF5 library already has set up a way to switch collective chunked I/O to independent
under these two cases.
3. A bug fix - During the work of the optimization for compound data I/O, the case for switching
collective chunked I/O to independent I/O was leftout. Fixed it by adding I/O caching to it in
H5D_multi_chunk_collective_io in H5Dmpio.c.
Tested on tungsten, cobalt, and kagiso for parallel; on linew and smirom for serial.
132 lines
3.7 KiB
Bash
132 lines
3.7 KiB
Bash
# -*- shell-script -*-
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#
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# Copyright by The HDF Group.
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# Copyright by the Board of Trustees of the University of Illinois.
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# All rights reserved.
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#
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# This file is part of HDF5. The full HDF5 copyright notice, including
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# terms governing use, modification, and redistribution, is contained in
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# the files COPYING and Copyright.html. COPYING can be found at the root
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# of the source code distribution tree; Copyright.html can be found at the
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# root level of an installed copy of the electronic HDF5 document set and
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# is linked from the top-level documents page. It can also be found at
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# http://hdfgroup.org/HDF5/doc/Copyright.html. If you do not have
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# access to either file, you may request a copy from help@hdfgroup.org.
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# This file is part of the HDF5 build script. It is processed shortly
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# after configure starts and defines, among other things, flags for
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# the various compile modes.
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#
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# See BlankForm in this directory for details.
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# The default compiler is `gcc'.
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if test -z "$CC"; then
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CC=gcc
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CC_BASENAME=gcc
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fi
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# Figure out GNU C compiler flags
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. $srcdir/config/gnu-flags
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# Figure out PGI C compiler flags
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. $srcdir/config/pgi-flags
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# Figure out Intel C compiler flags
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. $srcdir/config/intel-flags
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# Use default Fortran 90 compiler according to what C compiler is used.
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if test "X-" = "X-$FC"; then
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case $CC_BASENAME in
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gcc*)
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FC=g95
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FC_BASENAME=g95
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;;
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pgcc*)
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FC=pgf90
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FC_BASENAME=pgf90
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;;
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icc*)
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FC=ifort
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FC_BASENAME=ifort
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;;
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mpicc*)
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FC=mpif90
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FC_BASENAME=mpif90
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;;
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esac
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else
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case $FC in
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# The PGI and Intel compilers are automatically detected below
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ifc*|ifort*|pgf90*)
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;;
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*)
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# Figure out which compiler we are using: pgf90 or Absoft f95
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RM='rm -f'
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tmpfile=/tmp/cmpver.$$
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$FC -V >$tmpfile
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if test -s "$tmpfile"; then
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if( grep -s 'Absoft' $tmpfile > /dev/null) then
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FC_BASENAME=f95
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fi
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if( grep -s 'pgf90' $tmpfile > /dev/null) then
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FC_BASENAME=pgf90
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fi
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fi
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$RM $tmpfile
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;;
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esac
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fi
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# Figure out PGI F90 compiler flags
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. $srcdir/config/pgi-fflags
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# Figure out Intel F90 compiler flags
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. $srcdir/config/intel-fflags
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case $FC_BASENAME in
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#
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# Absoft compiler
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#
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f95)
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# Set required flag for compiling C stubs
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H5_CFLAGS="$H5_CFLAGS"
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F9XSUFFIXFLAG=""
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# We force compiler to use upper case for external names
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# (just in case since this should be a default EIP)
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H5_FCFLAGS="$H5_FCFLAGS"
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FSEARCH_DIRS=""
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DEBUG_FCFLAGS="-g"
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PROD_FCFLAGS="-O"
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PROFILE_FCFLAGS="-g -pg"
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f9x_flags_set=yes
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;;
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esac
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# The default C++ compiler
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# The default compiler is `g++'.
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if test -z "$CXX"; then
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CXX=g++
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CXX_BASENAME=g++
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fi
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# Check MPICH settings
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. $srcdir/config/mpich
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# The ChaMPIon on NCSA tungsten doesn't work correctly for either of the following
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# cases:
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# 1. collective I/O when some processes don't have any contributions;
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# 2. complex derived MPI data type.
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if test $CC_BASENAME = cmpicc; then
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hdf5_mpi_special_collective_io_works=${hdf5_mpi_special_collective_io_works='no'}
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hdf5_mpi_complex_derived_datatype_works=${hdf5_mpi_complex_derived_datatype_works='no'}
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fi
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#Comment out the following line if your system supports collective IO when some processes
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#don't have any contributions to IOs.
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#hdf5_mpi_special_collective_io_works=${hdf5_mpi_special_collective_io_works='no'}
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