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Aug 21
valgrind tools, use-this-cmd
Check for common memory errors in C with valgrind. Also profile cache misses and branch mispredictions.
Sample usage: 
# Check memory accesses.
valgrind --tool=memcheck ./prog

# View cache and branch profiling information.
valgrind --tool=cachegrind ./prog
For more detailed output from valgrind, add the -g tag to your gcc compilation flags to add debugging information to the binary.