From db276fa11c8a8b574f3467680a3372504629c114 Mon Sep 17 00:00:00 2001 From: Ulrich Drepper Date: Sun, 27 Dec 1998 17:29:47 +0000 Subject: Update. 1998-12-27 Ulrich Drepper * 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. --- sysdeps/generic/hp-timing.h | 80 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 80 insertions(+) create mode 100644 sysdeps/generic/hp-timing.h (limited to 'sysdeps/generic') diff --git a/sysdeps/generic/hp-timing.h b/sysdeps/generic/hp-timing.h new file mode 100644 index 0000000000..7795f510d5 --- /dev/null +++ b/sysdeps/generic/hp-timing.h @@ -0,0 +1,80 @@ +/* High precision, low overhead timing functions. i686 version. + Copyright (C) 1998 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Ulrich Drepper , 1998. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Library General Public License as + published by the Free Software Foundation; either version 2 of the + License, or (at your option) any later version. + + The GNU C Library 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 + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#ifndef _HP_TIMING_H +#define _HP_TIMING_H 1 + + +/* There are no generic definitions for the times. We could write something + using the `gettimeofday' system call where available but the overhead of + the system call might be too high. + + In case a platform supports timers in the hardware the following macros + and types must be defined: + + - HP_TIMING_AVAIL: test for availability. + + - HP_TIMING_INLINE: this macro is non-zero if the functionality is not + implemented using function calls but instead uses some inlined code + which might simply consist of a few assembler instructions. We have to + know this since we might want to use the macros here in places where we + cannot make function calls. + + - hp_timing_t: This is the type for variables used to store the time + values. + + - HP_TIMING_ZERO: clear `hp_timing_t' object. + + - HP_TIMING_NOW: place timestamp for current time in variable given as + parameter. + + - HP_TIMING_DIFF_INIT: do whatever is necessary to be able to use the + HP_TIMING_DIFF macro. + + - HP_TIMING_DIFF: compute difference between two times and store it + in a third. Source and destination might overlap. + + - HP_TIMING_ACCUM: add time difference to another variable. This might + be a bit more complicated to implement for some platforms as the + operation should be thread-safe and 64bit arithmetic on 32bit platforms + is not. + + - HP_TIMING_ACCUM_NT: this is the variant for situations where we know + there are no threads involved. + + - HP_TIMING_PRINT: write decimal representation of the timing value into + the given string. This operation need not be inline even though + HP_TIMING_INLINE is specified. + +*/ + +/* Provide dummy definitions. */ +#define HP_TIMING_AVAIL (0) +#define HP_TIMING_INLINE (0) +typedef int hp_timing_t; +#define HP_TIMING_ZERO(Var) +#define HP_TIMING_NOW(var) +#define HP_TIMING_DIFF_INIT() +#define HP_TIMING_DIFF(Diff, Start, End) +#define HP_TIMING_ACCUM(Sum, Diff) +#define HP_TIMING_ACCUM_NT(Sum, Diff) +#define HP_TIMING_PRINT(Buf, Len, Val) + +#endif /* hp-timing.h */ -- cgit 1.4.1