NAG recommends that users read the following minimum reference material before calling any library routine:
(a) Essential Introduction
(b) Chapter Introduction
(c) Routine Document
(d) Implementation-specific Users' Note
Assuming that a link to libnagmpi.a and libnagmpi_sup.a has been placed in a directory in the search path of the linker, and the ESSL component is available, then you may link to the NAG Parallel Library (using the IBM supplied ESSL library) as follows:
mpxlf_r -q64 driver.f -lnagmpi -lnagmpi_sup -lesslwhere driver.f is your application program.
mpiexec -n 4 a.outinstructs the system to execute the executable program a.out in four parallel processes. Consult local documentation for full details of the facilities of mpiexec(1) or alternatives to it.
The example programs are most easily accessed by using the script nagmpiexample, which will copy an example program and its data, compile it, link it with the libraries and run it.
For example, give the command
nagmpiexample f04ebfpto run the F04EBFP example program. This will place the results in the file f04ebfpe.r.
The values of the machine constants are:
The basic parameters of the model
X02BHF = 2 X02BJF = 53 X02BKF = -1021 X02BLF = 1024 X02DJF = .TRUE.Derived parameters of the floating-point arithmetic
X02AJF = 1.11022302462516D-16 X02AKF = 2.22507385850721D-308 X02ALF = 1.79769313486231D+308 X02AMF = 2.22507385850721D-308 X02ANF = 2.22507385850721D-308Parameters of other aspects of the computing environment
X02AHF = 8.11296384146067D+31 X02BBF = 2147483647 X02BEF = 15 X02DAF = .FALSE.
On-line documentation is provided, in PDF form, with this implementation. Please refer to local information for access to this documentation.
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