annotate src/profile.c @ 826:6728e641994e

[xemacs-hg @ 2002-05-05 11:30:15 by ben] syntax cache, 8-bit-format, lots of code cleanup README.packages: Update info about --package-path. i.c: Create an inheritable event and pass it on to XEmacs, so that ^C can be handled properly. Intercept ^C and signal the event. "Stop Build" in VC++ now works. bytecomp-runtime.el: Doc string changes. compat.el: Some attempts to redo this to make it truly useful and fix the "multiple versions interacting with each other" problem. Not yet done. Currently doesn't work. files.el: Use with-obsolete-variable to avoid warnings in new revert-buffer code. xemacs.mak: Split up CFLAGS into a version without flags specifying the C library. The problem seems to be that minitar depends on zlib, which depends specifically on libc.lib, not on any of the other C libraries. Unless you compile with libc.lib, you get errors -- specifically, no _errno in the other libraries, which must make it something other than an int. (#### But this doesn't seem to obtain in XEmacs, which also uses zlib, and can be linked with any of the C libraries. Maybe zlib is used differently and doesn't need errno, or maybe XEmacs provides an int errno; ... I don't understand. Makefile.in.in: Fix so that packages are around when testing. abbrev.c, alloc.c, buffer.c, buffer.h, bytecode.c, callint.c, casefiddle.c, casetab.c, casetab.h, charset.h, chartab.c, chartab.h, cmds.c, console-msw.h, console-stream.c, console-x.c, console.c, console.h, data.c, device-msw.c, device.c, device.h, dialog-msw.c, dialog-x.c, dired-msw.c, dired.c, doc.c, doprnt.c, dumper.c, editfns.c, elhash.c, emacs.c, eval.c, event-Xt.c, event-gtk.c, event-msw.c, event-stream.c, events.c, events.h, extents.c, extents.h, faces.c, file-coding.c, file-coding.h, fileio.c, fns.c, font-lock.c, frame-gtk.c, frame-msw.c, frame-x.c, frame.c, frame.h, glade.c, glyphs-gtk.c, glyphs-msw.c, glyphs-msw.h, glyphs-x.c, glyphs.c, glyphs.h, gui-msw.c, gui-x.c, gui.h, gutter.h, hash.h, indent.c, insdel.c, intl-win32.c, intl.c, keymap.c, lisp-disunion.h, lisp-union.h, lisp.h, lread.c, lrecord.h, lstream.c, lstream.h, marker.c, menubar-gtk.c, menubar-msw.c, menubar-x.c, menubar.c, minibuf.c, mule-ccl.c, mule-charset.c, mule-coding.c, mule-wnnfns.c, nas.c, objects-msw.c, objects-x.c, opaque.c, postgresql.c, print.c, process-nt.c, process-unix.c, process.c, process.h, profile.c, rangetab.c, redisplay-gtk.c, redisplay-msw.c, redisplay-output.c, redisplay-x.c, redisplay.c, redisplay.h, regex.c, regex.h, scrollbar-msw.c, search.c, select-x.c, specifier.c, specifier.h, symbols.c, symsinit.h, syntax.c, syntax.h, syswindows.h, tests.c, text.c, text.h, tooltalk.c, ui-byhand.c, ui-gtk.c, unicode.c, win32.c, window.c: Another big Ben patch. -- FUNCTIONALITY CHANGES: add partial support for 8-bit-fixed, 16-bit-fixed, and 32-bit-fixed formats. not quite done yet. (in particular, needs functions to actually convert the buffer.) NOTE: lots of changes to regex.c here. also, many new *_fmt() inline funs that take an Internal_Format argument. redo syntax cache code. make the cache per-buffer; keep the cache valid across calls to functions that use it. also keep it valid across insertions/deletions and extent changes, as much as is possible. eliminate the junky regex-reentrancy code by passing in the relevant lisp info to the regex routines as local vars. add general mechanism in extents code for signalling extent changes. fix numerous problems with the case-table implementation; yoshiki never properly transferred many algorithms from old-style to new-style case tables. redo char tables to support a default argument, so that mapping only occurs over changed args. change many chartab functions to accept Lisp_Object instead of Lisp_Char_Table *. comment out the code in font-lock.c by default, because font-lock.el no longer uses it. we should consider eliminating it entirely. Don't output bell as ^G in console-stream when not a TTY. add -mswindows-termination-handle to interface with i.c, so we can properly kill a build. add more error-checking to buffer/string macros. add some additional buffer_or_string_() funs. -- INTERFACE CHANGES AFFECTING MORE CODE: switch the arguments of write_c_string and friends to be consistent with write_fmt_string, which must have printcharfun first. change BI_* macros to BYTE_* for increased clarity; similarly for bi_* local vars. change VOID_TO_LISP to be a one-argument function. eliminate no-longer-needed CVOID_TO_LISP. -- char/string macro changes: rename MAKE_CHAR() to make_emchar() for slightly less confusion with make_char(). (The former generates an Emchar, the latter a Lisp object. Conceivably we should rename make_char() -> wrap_char() and similarly for make_int(), make_float().) Similar changes for other *CHAR* macros -- we now consistently use names with `emchar' whenever we are working with Emchars. Any remaining name with just `char' always refers to a Lisp object. rename macros with XSTRING_* to string_* except for those that reference actual fields in the Lisp_String object, following conventions used elsewhere. rename set_string_{data,length} macros (the only ones to work with a Lisp_String_* instead of a Lisp_Object) to set_lispstringp_* to make the difference clear. try to be consistent about caps vs. lowercase in macro/inline-fun names for chars and such, which wasn't the case before. we now reserve caps either for XFOO_ macros that reference object fields (e.g. XSTRING_DATA) or for things that have non-function semantics, e.g. directly modifying an arg (BREAKUP_EMCHAR) or evaluating an arg (any arg) more than once. otherwise, use lowercase. here is a summary of most of the macros/inline funs changed by all of the above changes: BYTE_*_P -> byte_*_p XSTRING_BYTE -> string_byte set_string_data/length -> set_lispstringp_data/length XSTRING_CHAR_LENGTH -> string_char_length XSTRING_CHAR -> string_emchar INTBYTE_FIRST_BYTE_P -> intbyte_first_byte_p INTBYTE_LEADING_BYTE_P -> intbyte_leading_byte_p charptr_copy_char -> charptr_copy_emchar LEADING_BYTE_* -> leading_byte_* CHAR_* -> EMCHAR_* *_CHAR_* -> *_EMCHAR_* *_CHAR -> *_EMCHAR CHARSET_BY_ -> charset_by_* BYTE_SHIFT_JIS* -> byte_shift_jis* BYTE_BIG5* -> byte_big5* REP_BYTES_BY_FIRST_BYTE -> rep_bytes_by_first_byte char_to_unicode -> emchar_to_unicode valid_char_p -> valid_emchar_p Change intbyte_strcmp -> qxestrcmp_c (duplicated functionality). -- INTERFACE CHANGES AFFECTING LESS CODE: use DECLARE_INLINE_HEADER in various places. remove '#ifdef emacs' from XEmacs-only files. eliminate CHAR_TABLE_VALUE(), which duplicated the functionality of get_char_table(). add BUFFER_TEXT_LOOP to simplify iterations over buffer text. define typedefs for signed and unsigned types of fixed sizes (INT_32_BIT, UINT_32_BIT, etc.). create ALIGN_FOR_TYPE as a higher-level interface onto ALIGN_SIZE; fix code to use it. add charptr_emchar_len to return the text length of the character pointed to by a ptr; use it in place of charcount_to_bytecount(..., 1). add emchar_len to return the text length of a given character. add types Bytexpos and Charxpos to generalize Bytebpos/Bytecount and Charbpos/Charcount, in code (particularly, the extents code and redisplay code) that works with either kind of index. rename redisplay struct params with names such as `charbpos' to e.g. `charpos' when they are e.g. a Charxpos, not a Charbpos. eliminate xxDEFUN in place of DEFUN; no longer necessary with changes awhile back to doc.c. split up big ugly combined list of EXFUNs in lisp.h on a file-by-file basis, since other prototypes are similarly split. rewrite some "*_UNSAFE" macros as inline funs and eliminate the _UNSAFE suffix. move most string code from lisp.h to text.h; the string code and text.h code is now intertwined in such a fashion that they need to be in the same place and partially interleaved. (you can't create forward references for inline funs) automated/lisp-tests.el, automated/symbol-tests.el, automated/test-harness.el: Fix test harness to output FAIL messages to stderr when in batch mode. Fix up some problems in lisp-tests/symbol-tests that were causing spurious failures.
author ben
date Sun, 05 May 2002 11:33:57 +0000
parents 943eaba38521
children 2b6fa2618f76
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1 /* Why the hell is XEmacs so fucking slow?
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2 Copyright (C) 1996 Ben Wing.
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3 Copyright (C) 1998 Free Software Foundation, Inc.
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4
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5 This file is part of XEmacs.
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6
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7 XEmacs is free software; you can redistribute it and/or modify it
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8 under the terms of the GNU General Public License as published by the
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9 Free Software Foundation; either version 2, or (at your option) any
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10 later version.
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11
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12 XEmacs is distributed in the hope that it will be useful, but WITHOUT
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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15 for more details.
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16
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17 You should have received a copy of the GNU General Public License
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18 along with XEmacs; see the file COPYING. If not, write to
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19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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20 Boston, MA 02111-1307, USA. */
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21
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22 #include <config.h>
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23 #include "lisp.h"
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24
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25 #include "backtrace.h"
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26 #include "bytecode.h"
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27 #include "elhash.h"
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28 #include "hash.h"
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29
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30 #include "syssignal.h"
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31 #include "systime.h"
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32
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33 #ifndef HAVE_SETITIMER
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34 #error Sorry charlie. We need a scalpel and all we have is a lawnmower.
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35 #endif
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36
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37 /* We implement our own profiling scheme so that we can determine
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38 things like which Lisp functions are occupying the most time. Any
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39 standard OS-provided profiling works on C functions, which is
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40 somewhat useless.
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41
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42 The basic idea is simple. We set a profiling timer using setitimer
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43 (ITIMER_PROF), which generates a SIGPROF every so often. (This
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44 runs not in real time but rather when the process is executing or
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45 the system is running on behalf of the process.) When the signal
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46 goes off, we see what we're in, and add 1 to the count associated
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47 with that function.
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48
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49 It would be nice to use the Lisp allocation mechanism etc. to keep
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50 track of the profiling information, but we can't because that's not
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51 safe, and trying to make it safe would be much more work than it's
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52 worth.
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53
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54
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55 Jan 1998: In addition to this, I have added code to remember call
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56 counts of Lisp funcalls. The profile_increase_call_count()
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57 function is called from Ffuncall(), and serves to add data to
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58 Vcall_count_profile_table. This mechanism is much simpler and
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59 independent of the SIGPROF-driven one. It uses the Lisp allocation
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60 mechanism normally, since it is not called from a handler. It may
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61 even be useful to provide a way to turn on only one profiling
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62 mechanism, but I haven't done so yet. --hniksic */
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63
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64 static struct hash_table *big_profile_table;
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65 Lisp_Object Vcall_count_profile_table;
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66
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67 Fixnum default_profiling_interval;
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69 int profiling_active;
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70
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71 /* The normal flag in_display is used as a critical-section flag
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72 and is not set the whole time we're in redisplay. */
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73 int profiling_redisplay_flag;
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74
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75 static Lisp_Object QSin_redisplay;
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76 static Lisp_Object QSin_garbage_collection;
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77 static Lisp_Object QSprocessing_events_at_top_level;
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78 static Lisp_Object QSunknown;
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79
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80 /* We use inside_profiling to prevent the handler from writing to
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81 the table while another routine is operating on it. We also set
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82 inside_profiling in case the timeout between signal calls is short
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83 enough to catch us while we're already in there. */
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84 static volatile int inside_profiling;
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85
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86 /* Increase the value of OBJ in Vcall_count_profile_table hash table.
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87 If the hash table is nil, create it first. */
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88 void
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89 profile_increase_call_count (Lisp_Object obj)
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90 {
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91 Lisp_Object count;
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92
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93 if (NILP (Vcall_count_profile_table))
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94 Vcall_count_profile_table =
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95 make_lisp_hash_table (100, HASH_TABLE_NON_WEAK, HASH_TABLE_EQ);
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96
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97 count = Fgethash (obj, Vcall_count_profile_table, Qzero);
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98 if (!INTP (count))
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99 count = Qzero;
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100 Fputhash (obj, make_int (1 + XINT (count)), Vcall_count_profile_table);
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101 }
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102
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103 static SIGTYPE
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104 sigprof_handler (int signo)
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105 {
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106 /* Don't do anything if we are shutting down, or are doing a maphash
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107 or clrhash on the table. */
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108 if (!inside_profiling && !preparing_for_armageddon)
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109 {
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110 Lisp_Object fun;
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111
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112 /* If something below causes an error to be signaled, we'll
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113 not correctly reset this flag. But we'll be in worse shape
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114 than that anyways, since we'll longjmp back to the last
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115 condition case. */
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116 inside_profiling = 1;
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117
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118 if (profiling_redisplay_flag)
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119 fun = QSin_redisplay;
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120 else if (gc_in_progress)
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121 fun = QSin_garbage_collection;
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122 else if (backtrace_list)
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123 {
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124 fun = *backtrace_list->function;
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125
434
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diff changeset
126 if (!SYMBOLP (fun)
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127 && !COMPILED_FUNCTIONP (fun)
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128 && !SUBRP (fun)
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diff changeset
129 && !CONSP (fun))
428
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130 fun = QSunknown;
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131 }
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132 else
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133 fun = QSprocessing_events_at_top_level;
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134
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135 {
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136 /* #### see comment about memory allocation in start-profiling.
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137 Allocating memory in a signal handler is BAD BAD BAD.
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138 If you are using the non-mmap rel-alloc code, you might
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139 lose because of this. Even worse, if the memory allocation
3ecd8885ac67 Import from CVS: tag r21-2-22
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140 fails, the `error' generated whacks everything hard. */
3ecd8885ac67 Import from CVS: tag r21-2-22
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141 long count;
442
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diff changeset
142 const void *vval;
428
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143
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144 if (gethash (LISP_TO_VOID (fun), big_profile_table, &vval))
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145 count = (long) vval;
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146 else
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147 count = 0;
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148 count++;
442
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diff changeset
149 vval = (const void *) count;
428
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150 puthash (LISP_TO_VOID (fun), (void *) vval, big_profile_table);
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151 }
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152
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153 inside_profiling = 0;
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154 }
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155 }
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156
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157 DEFUN ("start-profiling", Fstart_profiling, 0, 1, 0, /*
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158 Start profiling, with profile queries every MICROSECS.
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159 If MICROSECS is nil or omitted, the value of `default-profiling-interval'
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160 is used.
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161
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162 You can retrieve the recorded profiling info using `get-profiling-info'.
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163
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164 Starting and stopping profiling does not clear the currently recorded
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165 info. Thus you can start and stop as many times as you want and everything
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166 will be properly accumulated.
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167 */
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168 (microsecs))
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169 {
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170 /* This function can GC */
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171 int msecs;
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172 struct itimerval foo;
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173
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174 /* #### The hash code can safely be called from a signal handler
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175 except when it has to grow the hash table. In this case, it calls
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176 realloc(), which is not (in general) re-entrant. We'll just be
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177 sleazy and make the table large enough that it (hopefully) won't
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178 need to be realloc()ed. */
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179 if (!big_profile_table)
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180 big_profile_table = make_hash_table (10000);
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181
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182 if (NILP (microsecs))
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183 msecs = default_profiling_interval;
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184 else
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185 {
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186 CHECK_NATNUM (microsecs);
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187 msecs = XINT (microsecs);
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188 }
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189 if (msecs <= 0)
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190 msecs = 1000;
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191
613
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192 set_timeout_signal (SIGPROF, sigprof_handler);
428
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193 foo.it_value.tv_sec = 0;
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194 foo.it_value.tv_usec = msecs;
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195 EMACS_NORMALIZE_TIME (foo.it_value);
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196 foo.it_interval = foo.it_value;
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197 profiling_active = 1;
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198 inside_profiling = 0;
611
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199 qxe_setitimer (ITIMER_PROF, &foo, 0);
428
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200 return Qnil;
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201 }
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202
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203 DEFUN ("stop-profiling", Fstop_profiling, 0, 0, 0, /*
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204 Stop profiling.
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205 */
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206 ())
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207 {
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208 /* This function does not GC */
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209 struct itimerval foo;
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210
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211 foo.it_value.tv_sec = 0;
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212 foo.it_value.tv_usec = 0;
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213 foo.it_interval = foo.it_value;
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214 qxe_setitimer (ITIMER_PROF, &foo, 0);
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215 profiling_active = 0;
613
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216 set_timeout_signal (SIGPROF, fatal_error_signal);
428
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217 return Qnil;
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218 }
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219
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220 static Lisp_Object
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221 profile_lock_unwind (Lisp_Object ignore)
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222 {
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223 inside_profiling = 0;
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224 return Qnil;
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225 }
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226
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227 struct get_profiling_info_closure
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228 {
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229 Lisp_Object accum;
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230 };
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231
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232 static int
442
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233 get_profiling_info_maphash (const void *void_key,
428
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234 void *void_val,
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235 void *void_closure)
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236 {
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237 /* This function does not GC */
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238 Lisp_Object key;
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239 struct get_profiling_info_closure *closure
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240 = (struct get_profiling_info_closure *) void_closure;
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241 EMACS_INT val;
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242
826
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parents: 771
diff changeset
243 key = VOID_TO_LISP (void_key);
428
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244 val = (EMACS_INT) void_val;
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245
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246 closure->accum = Fcons (Fcons (key, make_int (val)), closure->accum);
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247 return 0;
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248 }
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249
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250 DEFUN ("get-profiling-info", Fget_profiling_info, 0, 0, 0, /*
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251 Return the profiling info as an alist.
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252 */
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253 ())
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cvs
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254 {
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cvs
parents:
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255 /* This function does not GC */
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cvs
parents:
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256 struct get_profiling_info_closure closure;
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257
3ecd8885ac67 Import from CVS: tag r21-2-22
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258 closure.accum = Qnil;
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259 if (big_profile_table)
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parents:
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260 {
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cvs
parents:
diff changeset
261 int count = specpdl_depth ();
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262 record_unwind_protect (profile_lock_unwind, Qnil);
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263 inside_profiling = 1;
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264 maphash (get_profiling_info_maphash, big_profile_table, &closure);
771
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ben
parents: 613
diff changeset
265 unbind_to (count);
428
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266 }
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267 return closure.accum;
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268 }
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269
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270 static int
442
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parents: 434
diff changeset
271 mark_profiling_info_maphash (const void *void_key,
428
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272 void *void_val,
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273 void *void_closure)
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274 {
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275 Lisp_Object key;
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276
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parents: 771
diff changeset
277 key = VOID_TO_LISP (void_key);
428
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diff changeset
278 mark_object (key);
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cvs
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diff changeset
279 return 0;
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cvs
parents:
diff changeset
280 }
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cvs
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281
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cvs
parents:
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282 void
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parents:
diff changeset
283 mark_profiling_info (void)
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cvs
parents:
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284 {
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cvs
parents:
diff changeset
285 /* This function does not GC */
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cvs
parents:
diff changeset
286 if (big_profile_table)
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cvs
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287 {
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288 inside_profiling = 1;
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parents:
diff changeset
289 maphash (mark_profiling_info_maphash, big_profile_table, 0);
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290 inside_profiling = 0;
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cvs
parents:
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291 }
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292 }
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parents:
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293
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294 DEFUN ("clear-profiling-info", Fclear_profiling_info, 0, 0, "", /*
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cvs
parents:
diff changeset
295 Clear out the recorded profiling info.
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parents:
diff changeset
296 */
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297 ())
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cvs
parents:
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298 {
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
299 /* This function does not GC */
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cvs
parents:
diff changeset
300 if (big_profile_table)
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
301 {
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
302 inside_profiling = 1;
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
303 clrhash (big_profile_table);
3ecd8885ac67 Import from CVS: tag r21-2-22
cvs
parents:
diff changeset
304 inside_profiling = 0;
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305 }
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306 if (!NILP (Vcall_count_profile_table))
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307 Fclrhash (Vcall_count_profile_table);
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308 return Qnil;
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309 }
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310
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311 DEFUN ("profiling-active-p", Fprofiling_active_p, 0, 0, 0, /*
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312 Return non-nil if profiling information is currently being recorded.
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313 */
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314 ())
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315 {
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316 return profiling_active ? Qt : Qnil;
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317 }
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318
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319 void
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320 syms_of_profile (void)
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321 {
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322 DEFSUBR (Fstart_profiling);
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323 DEFSUBR (Fstop_profiling);
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324 DEFSUBR (Fget_profiling_info);
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325 DEFSUBR (Fclear_profiling_info);
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326 DEFSUBR (Fprofiling_active_p);
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327 }
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328
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329 void
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330 vars_of_profile (void)
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331 {
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332 DEFVAR_INT ("default-profiling-interval", &default_profiling_interval /*
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333 Default CPU time in microseconds between profiling sampling.
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334 Used when the argument to `start-profiling' is nil or omitted.
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335 Note that the time in question is CPU time (when the program is executing
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336 or the kernel is executing on behalf of the program) and not real time.
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337 */ );
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338 default_profiling_interval = 1000;
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339
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340 DEFVAR_LISP ("call-count-profile-table", &Vcall_count_profile_table /*
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341 The table where call-count information is stored by the profiling primitives.
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342 This is a hash table whose keys are funcallable objects, and whose
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343 values are their call counts (integers).
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344 */ );
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345 Vcall_count_profile_table = Qnil;
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346
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347 inside_profiling = 0;
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348
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349 QSin_redisplay = build_msg_string ("(in redisplay)");
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350 staticpro (&QSin_redisplay);
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351 QSin_garbage_collection = build_msg_string ("(in garbage collection)");
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352 staticpro (&QSin_garbage_collection);
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353 QSunknown = build_msg_string ("(unknown)");
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354 staticpro (&QSunknown);
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355 QSprocessing_events_at_top_level =
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356 build_msg_string ("(processing events at top level)");
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357 staticpro (&QSprocessing_events_at_top_level);
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358 }