D.4 Sun Parallelization Directives

Format

C$PAR directive [optional_qualifiers] : initial lineC$PAR& [more_qualifiers] : continuation line

Fixed format, the directive-indicator may be C (as shown), c, *, or !. Separate multiple qualifiers with commas. Characters beyond column 72 ignored unless -e compiler option specified.

TASKCOMMON Directive

C$PAR TASKCOMMON block_name

Declares variables in common block block_name as thread-private: private to a thread, but global within the thread. Declaring a common block TASKCOMMON requires that this directive appear after every common declaration of that block.

DOALL Directive

C$PAR DOALL [qualifiers]

Parallelize DO loop that follows. Qualifiers are: 

PRIVATE(list) declare names on list PRIVATE

SHARED(list) declare names on list SHARED

MAXCPUS(n) use no more than n threads

READONLY(list) listed variables not modified in loop

SAVELAST save last value of all private variables

STOREBACK(list) save last value of listed variables

REDUCTION(list) listed variables are reduction variables

SCHEDTYPE(type) use scheduling type: (default is STATIC)

STATIC

SELF(nchunk)

FACTORING[(m)]

GSS[(m)]

DOSERIAL Directive

C$PAR DOSERIAL

Disables parallelization of the loop that follows. 

DOSERIAL* Directive

C$PAR DOSERIAL*

Disables parallelization of the loop nest that follows.