Using Intel MKL Verbose Mode

If your application calls Intel MKL functions, you may want to know what computational functions are called, what parameters are passed to them, and how much time is spent to execute the functions. Your application can print this information to a standard output device if Intel MKL Verbose mode is enabled. Functions that can print this information are referred to as verbose-enabled functions. While not all Intel MKL functions are verbose-enabled, see Intel MKL Release Notes for the Intel MKL function domains that support the Verbose mode.

In the Verbose mode, every call of a verbose-enabled function finishes with printing a human readable line describing the call. If the application is terminated during the function call, no information for that function is printed. The first call to a verbose-enabled function also prints a version information line.

To enable the Intel MKL Verbose mode for an application, do one of the following:

• Set the environment variable MKL_VERBOSE to 1.
• Call the support function mkl_verbose(1).

The function call mkl_verbose(0) disables the Verbose mode. Enabling or disabling the Verbose mode using the function call takes precedence over the environment setting. For a full description of the mkl_verbose function, see the Intel MKL Developer Reference, available in the Intel® Software Documentation Library.

Intel MKL Verbose mode is not a thread-local but a global state. It means that if an application changes the mode from multiple threads, the result is undefined.