Valgrind

General options

Syntax: valgrind [options] <your-program> <args>

  • –db-attach=yes : to automatically attach gdb on errors
  • –error-limit=no : to display all errors even if there are a lot of them
  • –num-callers=50 : to increase the maximum backtrace displayed

Tools

Memcheck

Memory checker (default tool).

Syntax: valgrind [–tool=memcheck] [options] <your-program> <args>

  • –leak-check=full : to completely analyse memory leaks
  • –show-reachable=yes: to show the detail of reachable memory
  • –track-origins=yes : to display where was allocated the “uninitialized value”

Massif

Memory profiling.

Syntax: valgrind –tool=massif [options] <your-program> <args> ; ms_print massif.<pid>

  • –time-unit=B : display results in bytes

Callgrind

Performance profiling, to find time taken in functions and number of calls of functions.

Syntax: valgrind –tool=callgrind <program-compiled-O2> <args> ; kcachegrind callgrind.out.xxxx ; calgrind_control

Cachegrind

CPU cache profiling, to find cache misses.

Syntax: valgrind –tool=cachegrind <program-compiled-O2> <args>

Always do profiling with optimization options of compiler, or you could optimize things that the compiler already automatically does.

software/valgrind.txt · Last modified: 2013/09/19 16:40 (external edit)
 
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