539 lines
14 KiB
C
539 lines
14 KiB
C
/* Timing variables for measuring compiler performance.
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Copyright (C) 2000 Free Software Foundation, Inc.
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Contributed by Alex Samuel <samuel@codesourcery.com>
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 2, or (at your option) any later
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version.
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GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License
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along with GCC; see the file COPYING. If not, write to the Free
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Software Foundation, 59 Temple Place - Suite 330, Boston, MA
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02111-1307, USA. */
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#include "config.h"
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#include "system.h"
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#include "intl.h"
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#include "rtl.h"
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#ifdef HAVE_SYS_TIMES_H
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# include <sys/times.h>
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#endif
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#ifdef HAVE_SYS_RESOURCE_H
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#include <sys/resource.h>
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#endif
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#ifndef HAVE_CLOCK_T
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typedef int clock_t;
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#endif
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#ifndef HAVE_STRUCT_TMS
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struct tms
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{
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clock_t tms_utime;
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clock_t tms_stime;
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clock_t tms_cutime;
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clock_t tms_cstime;
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};
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#endif
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#if defined HAVE_DECL_GETRUSAGE && !HAVE_DECL_GETRUSAGE
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extern int getrusage PARAMS ((int, struct rusage *));
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#endif
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#if defined HAVE_DECL_TIMES && !HAVE_DECL_TIMES
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extern clock_t times PARAMS ((struct tms *));
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#endif
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#if defined HAVE_DECL_CLOCK && !HAVE_DECL_CLOCK
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extern clock_t clock PARAMS ((void));
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#endif
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#ifndef RUSAGE_SELF
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# define RUSAGE_SELF 0
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#endif
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/* Calculation of scale factor to convert ticks to microseconds.
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We mustn't use CLOCKS_PER_SEC except with clock(). */
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#if HAVE_SYSCONF && defined _SC_CLK_TCK
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# define TICKS_PER_SECOND sysconf (_SC_CLK_TCK) /* POSIX 1003.1-1996 */
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#else
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# ifdef CLK_TCK
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# define TICKS_PER_SECOND CLK_TCK /* POSIX 1003.1-1988; obsolescent */
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# else
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# ifdef HZ
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# define TICKS_PER_SECOND HZ /* traditional UNIX */
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# else
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# define TICKS_PER_SECOND 100 /* often the correct value */
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# endif
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# endif
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#endif
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/* Prefer times to getrusage to clock (each gives successively less
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information). */
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#ifdef HAVE_TIMES
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# define USE_TIMES
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# define HAVE_USER_TIME
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# define HAVE_SYS_TIME
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# define HAVE_WALL_TIME
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#else
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#ifdef HAVE_GETRUSAGE
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# define USE_GETRUSAGE
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# define HAVE_USER_TIME
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# define HAVE_SYS_TIME
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#else
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#ifdef HAVE_CLOCK
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# define USE_CLOCK
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# define HAVE_USER_TIME
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#endif
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#endif
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#endif
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/* libc is very likely to have snuck a call to sysconf() into one of
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the underlying constants, and that can be very slow, so we have to
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precompute them. Whose wonderful idea was it to make all those
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_constants_ variable at run time, anyway? */
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#ifdef USE_TIMES
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static float ticks_to_msec;
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#define TICKS_TO_MSEC (1 / (float)TICKS_PER_SECOND)
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#endif
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#ifdef USE_CLOCK
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static float clocks_to_msec;
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#define CLOCKS_TO_MSEC (1 / (float)CLOCKS_PER_SEC)
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#endif
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#include "flags.h"
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#include "timevar.h"
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/* See timevar.h for an explanation of timing variables. */
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/* This macro evaluates to non-zero if timing variables are enabled. */
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#define TIMEVAR_ENABLE (time_report)
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/* A timing variable. */
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struct timevar_def
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{
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/* Elapsed time for this variable. */
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struct timevar_time_def elapsed;
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/* If this variable is timed independently of the timing stack,
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using timevar_start, this contains the start time. */
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struct timevar_time_def start_time;
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/* The name of this timing variable. */
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const char *name;
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/* Non-zero if this timing variable is running as a standalone
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timer. */
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unsigned standalone : 1;
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/* Non-zero if this timing variable was ever started or pushed onto
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the timing stack. */
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unsigned used : 1;
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};
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/* An element on the timing stack. Elapsed time is attributed to the
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topmost timing variable on the stack. */
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struct timevar_stack_def
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{
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/* The timing variable at this stack level. */
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struct timevar_def *timevar;
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/* The next lower timing variable context in the stack. */
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struct timevar_stack_def *next;
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};
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/* Declared timing variables. Constructed from the contents of
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timevar.def. */
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static struct timevar_def timevars[TIMEVAR_LAST];
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/* The top of the timing stack. */
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static struct timevar_stack_def *stack;
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/* A list of unused (i.e. allocated and subsequently popped)
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timevar_stack_def instances. */
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static struct timevar_stack_def *unused_stack_instances;
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/* The time at which the topmost element on the timing stack was
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pushed. Time elapsed since then is attributed to the topmost
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element. */
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static struct timevar_time_def start_time;
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static void get_time
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PARAMS ((struct timevar_time_def *));
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static void timevar_accumulate
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PARAMS ((struct timevar_time_def *, struct timevar_time_def *,
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struct timevar_time_def *));
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/* Fill the current times into TIME. The definition of this function
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also defines any or all of the HAVE_USER_TIME, HAVE_SYS_TIME, and
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HAVA_WALL_TIME macros. */
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static void
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get_time (now)
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struct timevar_time_def *now;
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{
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now->user = 0;
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now->sys = 0;
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now->wall = 0;
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if (!TIMEVAR_ENABLE)
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return;
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{
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#ifdef USE_TIMES
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struct tms tms;
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now->wall = times (&tms) * ticks_to_msec;
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now->user = tms.tms_utime * ticks_to_msec;
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now->sys = tms.tms_stime * ticks_to_msec;
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#endif
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#ifdef USE_GETRUSAGE
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struct rusage rusage;
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getrusage (RUSAGE_SELF, &rusage);
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now->user = rusage.ru_utime.tv_sec + rusage.ru_utime.tv_usec * 1e-6;
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now->sys = rusage.ru_stime.tv_sec + rusage.ru_stime.tv_usec * 1e-6;
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#endif
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#ifdef USE_CLOCK
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now->user = clock () * clocks_to_msec;
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#endif
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}
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}
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/* Add the difference between STOP_TIME and START_TIME to TIMER. */
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static void
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timevar_accumulate (timer, start_time, stop_time)
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struct timevar_time_def *timer;
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struct timevar_time_def *start_time;
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struct timevar_time_def *stop_time;
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{
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timer->user += stop_time->user - start_time->user;
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timer->sys += stop_time->sys - start_time->sys;
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timer->wall += stop_time->wall - start_time->wall;
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}
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/* Initialize timing variables. */
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void
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init_timevar ()
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{
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if (!TIMEVAR_ENABLE)
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return;
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/* Zero all elapsed times. */
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memset ((void *) timevars, 0, sizeof (timevars));
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/* Initialize the names of timing variables. */
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#define DEFTIMEVAR(identifier__, name__) \
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timevars[identifier__].name = name__;
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#include "timevar.def"
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#undef DEFTIMEVAR
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#ifdef USE_TIMES
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ticks_to_msec = TICKS_TO_MSEC;
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#endif
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#ifdef USE_CLOCK
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clocks_to_msec = CLOCKS_TO_MSEC;
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#endif
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}
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/* Push TIMEVAR onto the timing stack. No further elapsed time is
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attributed to the previous topmost timing variable on the stack;
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subsequent elapsed time is attributed to TIMEVAR, until it is
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popped or another element is pushed on top.
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TIMEVAR cannot be running as a standalone timer. */
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void
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timevar_push (timevar)
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timevar_id_t timevar;
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{
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struct timevar_def *tv = &timevars[timevar];
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struct timevar_stack_def *context;
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struct timevar_time_def now;
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if (!TIMEVAR_ENABLE)
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return;
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/* Mark this timing variable as used. */
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tv->used = 1;
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/* Can't push a standalone timer. */
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if (tv->standalone)
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abort ();
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/* What time is it? */
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get_time (&now);
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/* If the stack isn't empty, attribute the current elapsed time to
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the old topmost element. */
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if (stack)
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timevar_accumulate (&stack->timevar->elapsed, &start_time, &now);
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/* Reset the start time; from now on, time is attributed to
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TIMEVAR. */
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start_time = now;
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/* See if we have a previously-allocated stack instance. If so,
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take it off the list. If not, malloc a new one. */
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if (unused_stack_instances != NULL)
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{
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context = unused_stack_instances;
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unused_stack_instances = unused_stack_instances->next;
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}
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else
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context = (struct timevar_stack_def *)
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xmalloc (sizeof (struct timevar_stack_def));
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/* Fill it in and put it on the stack. */
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context->timevar = tv;
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context->next = stack;
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stack = context;
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}
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/* Pop the topmost timing variable element off the timing stack. The
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popped variable must be TIMEVAR. Elapsed time since the that
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element was pushed on, or since it was last exposed on top of the
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stack when the element above it was popped off, is credited to that
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timing variable. */
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void
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timevar_pop (timevar)
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timevar_id_t timevar;
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{
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struct timevar_time_def now;
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struct timevar_stack_def *popped = stack;
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if (!TIMEVAR_ENABLE)
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return;
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if (&timevars[timevar] != stack->timevar)
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abort ();
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/* What time is it? */
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get_time (&now);
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/* Attribute the elapsed time to the element we're popping. */
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timevar_accumulate (&popped->timevar->elapsed, &start_time, &now);
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/* Reset the start time; from now on, time is attributed to the
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element just exposed on the stack. */
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start_time = now;
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/* Take the item off the stack. */
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stack = stack->next;
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/* Don't delete the stack element; instead, add it to the list of
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unused elements for later use. */
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popped->next = unused_stack_instances;
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unused_stack_instances = popped;
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}
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/* Start timing TIMEVAR independently of the timing stack. Elapsed
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time until timevar_stop is called for the same timing variable is
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attributed to TIMEVAR. */
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void
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timevar_start (timevar)
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timevar_id_t timevar;
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{
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struct timevar_def *tv = &timevars[timevar];
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if (!TIMEVAR_ENABLE)
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return;
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/* Mark this timing variable as used. */
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tv->used = 1;
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/* Don't allow the same timing variable to be started more than
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once. */
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if (tv->standalone)
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abort ();
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tv->standalone = 1;
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get_time (&tv->start_time);
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}
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/* Stop timing TIMEVAR. Time elapsed since timevar_start was called
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is attributed to it. */
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void
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timevar_stop (timevar)
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timevar_id_t timevar;
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{
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struct timevar_def *tv = &timevars[timevar];
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struct timevar_time_def now;
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if (!TIMEVAR_ENABLE)
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return;
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/* TIMEVAR must have been started via timevar_start. */
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if (!tv->standalone)
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abort ();
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get_time (&now);
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timevar_accumulate (&tv->elapsed, &tv->start_time, &now);
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}
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/* Fill the elapsed time for TIMEVAR into ELAPSED. Returns
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update-to-date information even if TIMEVAR is currently running. */
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void
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timevar_get (timevar, elapsed)
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timevar_id_t timevar;
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struct timevar_time_def *elapsed;
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{
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struct timevar_def *tv = &timevars[timevar];
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struct timevar_time_def now;
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*elapsed = tv->elapsed;
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/* Is TIMEVAR currently running as a standalone timer? */
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if (tv->standalone)
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{
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get_time (&now);
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timevar_accumulate (elapsed, &tv->start_time, &now);
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}
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/* Or is TIMEVAR at the top of the timer stack? */
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else if (stack->timevar == tv)
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{
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get_time (&now);
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timevar_accumulate (elapsed, &start_time, &now);
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}
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}
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/* Summarize timing variables to FP. The timing variable TV_TOTAL has
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a special meaning -- it's considered to be the total elapsed time,
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for normalizing the others, and is displayed last. */
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void
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timevar_print (fp)
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FILE *fp;
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{
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/* Only print stuff if we have some sort of time information. */
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#if defined (HAVE_USER_TIME) || defined (HAVE_SYS_TIME) || defined (HAVE_WALL_TIME)
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unsigned int /* timevar_id_t */ id;
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struct timevar_time_def *total = &timevars[TV_TOTAL].elapsed;
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struct timevar_time_def now;
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if (!TIMEVAR_ENABLE)
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return;
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/* Update timing information in case we're calling this from GDB. */
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if (fp == 0)
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fp = stderr;
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/* What time is it? */
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get_time (&now);
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/* If the stack isn't empty, attribute the current elapsed time to
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the old topmost element. */
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if (stack)
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timevar_accumulate (&stack->timevar->elapsed, &start_time, &now);
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/* Reset the start time; from now on, time is attributed to
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TIMEVAR. */
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start_time = now;
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fputs (_("\nExecution times (seconds)\n"), fp);
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for (id = 0; id < (unsigned int) TIMEVAR_LAST; ++id)
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{
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struct timevar_def *tv = &timevars[(timevar_id_t) id];
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const float tiny = 5e-3;
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/* Don't print the total execution time here; that goes at the
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end. */
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if ((timevar_id_t) id == TV_TOTAL)
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continue;
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/* Don't print timing variables that were never used. */
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if (!tv->used)
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continue;
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/* Don't print timing variables if we're going to get a row of
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zeroes. */
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if (tv->elapsed.user < tiny
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&& tv->elapsed.sys < tiny
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&& tv->elapsed.wall < tiny)
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continue;
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/* The timing variable name. */
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fprintf (fp, " %-22s:", tv->name);
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#ifdef HAVE_USER_TIME
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/* Print user-mode time for this process. */
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fprintf (fp, "%7.2f (%2.0f%%) usr",
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tv->elapsed.user,
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(total->user == 0 ? 0 : tv->elapsed.user / total->user) * 100);
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#endif /* HAVE_USER_TIME */
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#ifdef HAVE_SYS_TIME
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/* Print system-mode time for this process. */
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fprintf (fp, "%7.2f (%2.0f%%) sys",
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tv->elapsed.sys,
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(total->sys == 0 ? 0 : tv->elapsed.sys / total->sys) * 100);
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#endif /* HAVE_SYS_TIME */
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#ifdef HAVE_WALL_TIME
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/* Print wall clock time elapsed. */
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fprintf (fp, "%7.2f (%2.0f%%) wall",
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tv->elapsed.wall,
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(total->wall == 0 ? 0 : tv->elapsed.wall / total->wall) * 100);
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#endif /* HAVE_WALL_TIME */
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putc ('\n', fp);
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}
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/* Print total time. */
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fputs (_(" TOTAL :"), fp);
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#ifdef HAVE_USER_TIME
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fprintf (fp, "%7.2f ", total->user);
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#endif
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#ifdef HAVE_SYS_TIME
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fprintf (fp, "%7.2f ", total->sys);
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#endif
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#ifdef HAVE_WALL_TIME
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fprintf (fp, "%7.2f\n", total->wall);
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#endif
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#endif /* defined (HAVE_USER_TIME) || defined (HAVE_SYS_TIME)
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|| defined (HAVE_WALL_TIME) */
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}
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/* Returns time (user + system) used so far by the compiler process,
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in microseconds. */
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long
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get_run_time ()
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{
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struct timevar_time_def total_elapsed;
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timevar_get (TV_TOTAL, &total_elapsed);
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return total_elapsed.user + total_elapsed.sys;
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}
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/* Prints a message to stderr stating that time elapsed in STR is
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TOTAL (given in microseconds). */
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void
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print_time (str, total)
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const char *str;
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long total;
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{
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long all_time = get_run_time ();
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fprintf (stderr,
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_("time in %s: %ld.%06ld (%ld%%)\n"),
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str, total / 1000000, total % 1000000,
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all_time == 0 ? 0
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: (long) (((100.0 * (double) total) / (double) all_time) + .5));
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}
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