Difference between revisions of "Performance And Debugging Tools: GPC"
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− | ==Memory Profiling== | + | ==Memory Profiling & Debugging== |
− | + | Valgrind http://valgrind.org/ is a suite of tools for debugging and profiling programs especially | |
+ | useful for finding memory problems, such as memory leaks and segfaults. | ||
− | valgrind | + | In serial valgrind can simply by run as follows, with no need to recompile your binary |
+ | valgrind --tool=memcheck ./a.out | ||
+ | there are many useful flags such as --leak-check=yes and --show-reachable=yes that | ||
+ | can be found by running valgrind --help on consulting the man pages. | ||
+ | |||
+ | ===Parallel with MPI=== | ||
+ | |||
+ | Valgrind can also be used in parallel, as documented http://valgrind.org/docs/manual/mc-manual.html#mc-manual.mpiwrap | ||
+ | in a similar fashion, however a library needs to be preloaded firts. | ||
+ | |||
+ | LD_PRELOAD=/lib/valgrind/amd64-linux/libmpiwrap.so mpirun -np 2 valgrind ./a.out | ||
==Debugging== | ==Debugging== | ||
gdb/idb | gdb/idb |
Revision as of 16:30, 1 June 2009
Memory Profiling & Debugging
Valgrind http://valgrind.org/ is a suite of tools for debugging and profiling programs especially useful for finding memory problems, such as memory leaks and segfaults.
In serial valgrind can simply by run as follows, with no need to recompile your binary
valgrind --tool=memcheck ./a.out
there are many useful flags such as --leak-check=yes and --show-reachable=yes that can be found by running valgrind --help on consulting the man pages.
Parallel with MPI
Valgrind can also be used in parallel, as documented http://valgrind.org/docs/manual/mc-manual.html#mc-manual.mpiwrap in a similar fashion, however a library needs to be preloaded firts.
LD_PRELOAD=/lib/valgrind/amd64-linux/libmpiwrap.so mpirun -np 2 valgrind ./a.out
Debugging
gdb/idb