HP XC System 3.x Software User Manual
Page 74
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-libcxa option 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:
8.1.2 Running a Program – Intel Trace Collector and HP-MPI
Assuming that you have built your program using the -static-libcxa option, as discussed in
a Program — Intel Trace Collector and HP-MPI”
, you can launch the program with the mpirun.mpich
command, as shown in the following example.
shows how to run the vtjacobic example program discussed in
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
, ~/examples_directory/vtjacobic represents the file specification for the vtjacobic
example program.
74
Tuning Applications