6.1 Compiling C Programs

In order to analyze the performance of your sequential C program, you'll first need to recompile it using one of the PPW compiler wrapper scripts. Simply use the wrapper scripts in place of your normal C compiler (eg, in place of gcc).

For sequential C programs, you have two options:

• Compile with ppwupcc: Since every C program is a valid UPC program, you should be able to compile your application with a UPC compiler. See Compiling UPC Programs.
• Compile with ppwcc: If compiling your C application with a UPC compiler is not a viable option, you can still use PPW with your sequential code if you manually instrument your code with API calls. See Recording Phase Data in C.

For more information on the compiler wrapper commands, please see ppwcc, or ppwupcc if you are using a UPC compiler installation. If you experience very high overhead (ie, much longer execution times) while running your program under PPW, see Managing Overhead for tips on how to reduce overhead.