Valgrind: Difference between revisions

To get useful information from [http://valgrind.org/ Valgrind], you first need to compile your code with debuging information enabled. With the [[GCC/en|GNU]] and [[Intel/en|Intel]] compilers, you do so by adding a "<tt>-g</tt>" option on compilation. For other compilers, check their documentation.

Some aggressive optimisations may yield false errors in Valgrind if they result in unsupported operations. This is the case for example with some operations implemented in the [[MKL/en|MKL]] library. Since you don't want to diagnose errors in those libraries, but rather errors in your own code, you should compile and link your code against non-optimized versions of the libraries (such as the Netlib implementation of BLAS/LAPACK) that will not do those operations. This is of course only to diagnose issues. When time comes to run real simulations, you should link against optimized libraries.