Method to examine the execution and performance of parallel threads in parallel programming

A computer program product that includes a computer readable medium useable by a processor, the medium having stored thereon a sequence of instructions which, when executed by the processor, causes the processor to examine the execution and performance of parallel threads in a parallel computing system, wherein the computer program product executes the steps of:

• acquiring source code of a parallel processing application for compilation within a computing system;
• selecting at least one parallelized code segment from the source code for processing, wherein the parallelized code comprises a loop segment;
• generating additional code for the parallelized code segment, the added code segment comprising N threads and one thread of execution, wherein N represents the number of parallel threads of execution at run time into which the parallelized code segment is partitioned.
• determining if the expected number of N threads of execution have been generated.
• transmitting a warning in the event that the expected number of N threads of execution have not been generated;
• identifying a starting index value and a completion index value of the loop;
• identifying a primary sub-loop of the loop, wherein the primary sub-loop comprises the N threads of execution;
• generating a warning to the computing system operator in the event that the primary sub-loop cannot be identified, and thereafter completing the execution of the loop and the processing of the application.
• identifying a secondary sub-loop for the loop, wherein the secondary sub-loop comprises the one thread of execution;
• generating a warning in the event that the secondary sub-loop cannot be identified and thereafter completing the execution of the loop and the processing of the application;
• completing the remaining iterations of the loop;
• determining the performance metrics of the N threads of execution;
• determining the performance metrics of the one thread of execution;
• comparing the performance metrics of the one thread of execution with that of the N threads of execution;
• reporting the performance ratio of N threads of execution versus the one thread of execution.