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

Timing variables for measuring compiler performance. Copyright (C) 2000-2013 Free Software Foundation, Inc. Contributed by Alex Samuel samue.nosp@m.l@co.nosp@m.desou.nosp@m.rcer.nosp@m.y.com

This file is part of GCC.

GCC is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3, or (at your option) any later version.

GCC is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with GCC; see the file COPYING3. If not see http://www.gnu.org/licenses/. 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: