Gridhra is a web based debugger and visualization tool for parallel applications on the Grid. Designed specifically to meet the scalability and heterogeneity concerns in a grid, this tool offers a unified interface for performing both correctness and performance debugging of grid-enabled parallel applications. Deployed as a web tool, Gridhra frees the user from the hassles of remote debugging and performance visualization of such applications. With a feature-rich graphical user interface, Gridhra masks all the complexities involved in debugging distributed applications.

Debugger Features

• Caters to the heterogeneity of the resources on the grid.
• Offers a rich GUI wizard for masking all the intricacies involved in generating the job description and submitting it.
• Supports Source Level Debugging of MPICH-G2 applications.
• Supports logical grouping of processes for issuing debugging commands collectively.

Visualizer Features

• Provides a visual depiction of the application flow, in coherence with the source code.
• Offers a comprehensive, visual depiction of the Call Graph sequence of the application, along with the time spent in each routine.
• Provides a Time Line representation of the communication events in the application.
• Provides communication -computation breakup, both process-wise and application-wise.
• Highlights the frequently used calls and time spent in each of them.

Future Enhancements Planned

• Debugging and visualization of FORTRAN MPI Applications
• Debugging and profiling of Serial Applications written in C and FORTRAN
• Debugging session from first executable statement in both serial and parallel programs developed using FORTRAN and C.
• Detection of Deadlocks in programs, arising from improper use of MPI calls. (FORTRAN and C

Availability