Monitoring The Execution Of A VAX Image

Abstract

Computer program PROCSCAN developed to monitor profile of executable image during execution. Purpose to identify routines in which program is spending most of its time. PROSCAN very useful first step in optimization of program. PROSCAN samples program counter of executing image and compares its value to table of entry-point addresses to determine which subroutine is executing. Written in C (77 percent), Assembler (13 percent), and FORTRAN 77 (10 percent).