GCC Middle and Back End API Reference
Data Fields
timevar_time_def Struct Reference

#include <timevar.h>

Data Fields

double user
double sys
double wall
size_t ggc_mem

Detailed Description

@verbatim

Timing variables are used to measure elapsed time in various portions of the compiler. Each measures elapsed user, system, and wall-clock time, as appropriate to and supported by the host system.

Timing variables are defined using the DEFTIMEVAR macro in timevar.def. Each has an enumeral identifier, used when referring to the timing variable in code, and a character string name.

Timing variables can be used in two ways:

  • On the timing stack, using timevar_push and timevar_pop. Timing variables may be pushed onto the stack; elapsed time is attributed to the topmost timing variable on the stack. When another variable is pushed on, the previous topmost variable is `paused' until the pushed variable is popped back off.
  • As a standalone timer, using timevar_start and timevar_stop. All time elapsed between the two calls is attributed to the variable. 
       This structure stores the various varieties of time that can be
   measured.  Times are stored in seconds.  The time may be an
   absolute time or a time difference; in the former case, the time
   base is undefined, except that the difference between two times
   produces a valid time difference.

Field Documentation

size_t timevar_time_def::ggc_mem 
     Garbage collector memory.

Referenced by timevar_cond_start(), timevar_cond_stop(), and validate_phases().

double timevar_time_def::sys 
     System time (if applicable for this host platform) in this
     process.

Referenced by timevar_cond_start(), timevar_cond_stop(), and validate_phases().

double timevar_time_def::user 
     User time in this process.

Referenced by timevar_cond_start(), timevar_cond_stop(), and validate_phases().

double timevar_time_def::wall 
     Wall clock time.

Referenced by timevar_cond_start(), timevar_cond_stop(), and validate_phases().

The documentation for this struct was generated from the following file: