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1998-12-27 Ulrich Drepper <drepper@cygnus.com> * elf/dl-lookup.c (_dl_num_relocations): New variable. (do_lookup): Increment _dl_num_relocations for every call. * elf/rtld.c (print_statistics): New function. (_dl_debug_statistics): New variable. Set when statistics are asked for. (rtld_total_time, relocate_time, load_time): New variables. Used in print_statistics. (_dl_start): Record start and end time of startup. Call print_statistics if needed. (dk_main): Record times for relocations and loading. (process_dl_debug): Recognize statistics. Low-level, low-overhead, high-precision timing funcationality. * sysdeps/generic/hp-timing.h: New file. * sysdeps/i386/i686/Makefile: New file. * sysdeps/i386/i686/hp-timing.h: New file. * sysdeps/i386/i686/hp-timing.c: New file. * sysdeps/i386/dl-machine.h (elf_machine_rel): Reverse order of OR clauses to avoid accessing global variables during rtld relocation. * sunrpc/rpc_main.c: Unify messages. * sysdeps/unix/sysv/linux/arm/Dist: Add ioperm.c and sys/io.h.
81 lines
3.0 KiB
C
81 lines
3.0 KiB
C
/* High precision, low overhead timing functions. i686 version.
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Copyright (C) 1998 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#ifndef _HP_TIMING_H
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#define _HP_TIMING_H 1
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/* There are no generic definitions for the times. We could write something
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using the `gettimeofday' system call where available but the overhead of
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the system call might be too high.
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In case a platform supports timers in the hardware the following macros
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and types must be defined:
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- HP_TIMING_AVAIL: test for availability.
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- HP_TIMING_INLINE: this macro is non-zero if the functionality is not
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implemented using function calls but instead uses some inlined code
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which might simply consist of a few assembler instructions. We have to
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know this since we might want to use the macros here in places where we
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cannot make function calls.
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- hp_timing_t: This is the type for variables used to store the time
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values.
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- HP_TIMING_ZERO: clear `hp_timing_t' object.
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- HP_TIMING_NOW: place timestamp for current time in variable given as
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parameter.
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- HP_TIMING_DIFF_INIT: do whatever is necessary to be able to use the
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HP_TIMING_DIFF macro.
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- HP_TIMING_DIFF: compute difference between two times and store it
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in a third. Source and destination might overlap.
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- HP_TIMING_ACCUM: add time difference to another variable. This might
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be a bit more complicated to implement for some platforms as the
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operation should be thread-safe and 64bit arithmetic on 32bit platforms
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is not.
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- HP_TIMING_ACCUM_NT: this is the variant for situations where we know
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there are no threads involved.
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- HP_TIMING_PRINT: write decimal representation of the timing value into
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the given string. This operation need not be inline even though
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HP_TIMING_INLINE is specified.
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*/
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/* Provide dummy definitions. */
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#define HP_TIMING_AVAIL (0)
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#define HP_TIMING_INLINE (0)
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typedef int hp_timing_t;
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#define HP_TIMING_ZERO(Var)
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#define HP_TIMING_NOW(var)
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#define HP_TIMING_DIFF_INIT()
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#define HP_TIMING_DIFF(Diff, Start, End)
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#define HP_TIMING_ACCUM(Sum, Diff)
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#define HP_TIMING_ACCUM_NT(Sum, Diff)
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#define HP_TIMING_PRINT(Buf, Len, Val)
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#endif /* hp-timing.h */
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