Manual

Q&A

NEC SX6

Q-1 Fortran program loop count of compiling

A-1 Default option -Wf" -pvctl vwork=stack" makes performance degradation less than 10%. You can set static option of loop count when you compile programs.

Example : setting loop count 20000

sxf90(or f90) -Wf" -pvctl vwork=static loopcnt=20000" -o ./a.out xxxxxx.f