5 HPF Blocking with the ADAPTOR Compilation System

The HPF compilation system ADAPTOR [1] provided by SCAI has been extended to implement this approach. This Section describes in more detail how to use the ADAPTOR system.

5.1 Source-To-Source Translation

For the source-to-source translation the two flags -hpf and -cb must be enabled.

      fadapt -hpf -cb <program>.f
      fadapt -HPF -cb <program>.f

• The flag -hpf enables HPF compilation. HPF directives are analyzed and applied to the source program. The generated source code contains subroutine calls to the routines of the HPF runtime system.
• The flag -cb chooses the execution model for cache blocking.
• The flag -HPF is an abbreviation for -hpf -off:OMP -off and guarantees that no other directives will influence the HPF compilation. It should be prefered to -hpf as there might be some side effects, e.g. if an OpenMP ATOMIC directive appears in the code.

5.2 Compling and Linking

The new source code has to be compiled by a native Fortran compiler and to be linked with the HPF runtime system. This is done alltogether by the ADAPTOR compiler driver.

      adaptor -hpf -cb <program>.f

• The flag -hpf enables the flag -HPF for the source-to-source translation and links the HPF runtime system.
• The flag -cb is only passed to the source-to-source translation.

fadapt -HPF -cb local1.hpf
ifc -w -O local1_adp.f -c -o local1.o
rm -f local1_adp.f
ifc -o a.out local1.o -L/home/brandes/adaptor/dalib/ -ladp_hpf -ladp_dm_null \
                      -ladp_sm_null -ladp_pm_null -ladp_trace_null -lPEPCF90

5.3 Execution

The topology of the default abstract processor array is specified at runtime:

       a.out -nb p1
       a.out -nb p1xp2
       a.out -nb p1xp2xp3