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RT_Result: Execution Statistics

Specification: init fills res with statistical information about the currently executing RT++ program. print writes the contents of res to the standard output stream.

A pointer to such a structure is used in rt_main to return statistical information about the execution of an RT++ program after the program has terminated.

The components of the structure have the following interpretation:

• If the structure is defined by rt_main, ret_code contains the return code r of the program as returned by the main function, respectively by a call of rt_exit(r) . The return code is set to $-1$, if rt_abort was called during program execution.

  If the structure is defined by a call of init, ret_code is set to $-1$.

• time_real contains the real time spent in the RT++ program (in ms).
• time_proc contains the time that the current process spent in the RT++ program (the sum of user and system time in ms).
• time_all contains the time that the current process and its children processes spent in the RT++ program (the sum of all user and system times in ms).
• gc_number contains the number of garbage collections performed during program execution.
• gc_inc contains the number of increments of the heap.
• gc_wait contains the total amount of (real) time that passed from triggering a garbage collection to actually starting the garbage collection (in ms).
• gc_time contains the total amount of (real) time that passed from starting a garbage collection to completing the garbage collection (in ms).
• gc_blocks contains the total amount of contiguous memory blocks reclaimed during garbage collections.
• gc_bytes contains the total amount of bytes reclaimed during garbage collections.