HP XC System 4.x Software manual Running a Program Intel Trace Collector and HP-MPI

Example 8-1 The vtjacobic Example Program

For the purposes of this example, the examples directory under /opt/IntelTrace/ITC is copied to the user's home directory and renamed to examples_directory.

The GNU Makefile looks as follows:

CC= mpicc.mpich

F77 = mpif77.mpich CLINKER = mpicc.mpich FLINKER = mpif77.mpich IFLAGS = -I$(VT_ROOT)/include CFLAGS = -g

FFLAGS = -g

LIBS	= -lvtunwind -ldwarf -lnsl -lm -lelf -lpthread
CLDFLAGS	=	-static-libcxa -L$(VT_ROOT)/lib					$(TLIB) -lvtunwind \
		-ldwarf	-lnsl	-lm	-lelf	-lpthread
FLDFLAGS	=	-static-libcxa -L$(VT_ROOT)/lib					$(TLIB) -lvtunwind \
		-ldwarf	-lnsl	-lm	-lelf	-lpthread

In the cases where Intel compilers are used, add the -static-libcxaoption to the link line. Otherwise the following type of error will occur at run-time:

$ mpirun.mpich -np 2 ~/examples_directory/vtjacobic ~/examples_directory/vtjacobic:

error while loading shared libraries: libcprts.so.6: cannot open shared object file:

No such file or directory

MPI Application rank 0 exited before MPI_Init() with status 127 mpirun exits with status: 127

In “The vtjacobic Example Program”, ~/examples_directory/vtjacobic represents the file specification for the vtjacobic example program.

For more information, see the following Web site:

http://support.intel.com/support/performancetools/c/linux/sb/CS-010097.htm

8.1.2 Running a Program – Intel Trace Collector and HP-MPI

Assuming that you have built your program using the -static-libcxaoption, as discussed in “Building a Program — Intel Trace Collector and HP-MPI”, you can launch the program with the mpirun.mpich command, as shown in the following example.

Example 8-2shows how to run the vtjacobic example program discussed in “Building a Program — Intel Trace Collector and HP-MPI”.

Example 8-2 C Example – Running the vtjacobic Example Program

$ mpirun.mpich -np 2 ~/examples_directory/vtjacobic ~/examples_directory/vtjacobic:100 iterations

in 0.228252 secs (28.712103 MFlops), m=130 n=130 np=2 [0] Intel Trace Collector INFO: Writing tracefile vtjacobic.stf in ~/examples_directory/vtjacobic

mpirun exits with status: 0

In Example 8-2, ~/examples_directory/vtjacobic represents the file specification for the vtjacobic example program.

76 Tuning Applications