1 /* $OpenPackages$ */ 2 /* $OpenBSD: stats.c,v 1.5 2001/06/12 22:44:22 espie Exp $ */ 3 4 /* 5 * Copyright (c) 1999 Marc Espie. 6 * 7 * Code written for the OpenBSD project. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE OPENBSD PROJECT AND CONTRIBUTORS 19 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OPENBSD 22 * PROJECT OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 32 /* statistics gathering */ 33 34 /* collection across make invocations is done with an mmap shared file, 35 to allow for concurrent adjustment to variables. 36 */ 37 38 #include "config.h" 39 #include "defines.h" 40 #include "stats.h" 41 42 #ifdef HAS_STATS 43 #include <fcntl.h> 44 #include <stdio.h> 45 #include <stdlib.h> 46 #include <sys/time.h> 47 #include <sys/mman.h> 48 #include <sys/types.h> 49 #include <sys/resource.h> 50 #include "memory.h" 51 52 static void print_stats(void); 53 void Init_Stats(void); 54 static float average_runs(unsigned long val); 55 unsigned long *statarray; 56 57 static bool mmapped = false; 58 59 static float 60 average_runs(val) 61 unsigned long val; 62 { 63 return (float)val / STAT_INVOCATIONS; 64 } 65 66 static void 67 print_stats() 68 { 69 struct rusage ru; 70 71 if (getrusage(RUSAGE_SELF, &ru) != -1) { 72 STAT_USER_SECONDS += ru.ru_utime.tv_sec; 73 STAT_USER_MS += ru.ru_utime.tv_usec; 74 if (STAT_USER_MS > 1000000) { 75 STAT_USER_MS -= 1000000; 76 STAT_USER_SECONDS++; 77 } 78 STAT_SYS_SECONDS += ru.ru_stime.tv_sec; 79 STAT_SYS_MS += ru.ru_stime.tv_usec; 80 if (STAT_SYS_MS > 1000000) { 81 STAT_SYS_MS -= 1000000; 82 STAT_SYS_SECONDS++; 83 } 84 } 85 fprintf(stderr, "Make runs: %lu\n", STAT_INVOCATIONS); 86 fprintf(stderr, "Time user: %lu.%06lu, sys %lu.%06lu\n", 87 STAT_USER_SECONDS, STAT_USER_MS, 88 STAT_SYS_SECONDS, STAT_SYS_MS); 89 #ifdef STATS_VAR_LOOKUP 90 /* to get the average total of MAXSIZE, we need this value */ 91 STAT_VAR_POWER += 92 STAT_VAR_HASH_MAXSIZE * STAT_VAR_HASH_CREATION; 93 fprintf(stderr, "Var finds: %f, lookups: %f, average: %f, max: %lu\n", 94 average_runs(STAT_VAR_FIND), 95 average_runs(STAT_VAR_SEARCHES), 96 (float)STAT_VAR_COUNT/STAT_VAR_SEARCHES, 97 STAT_VAR_MAXCOUNT); 98 fprintf(stderr, "Average hash: %f, creation: %f, from env %f\n", 99 average_runs(STAT_VAR_HASH_CREATION), 100 average_runs(STAT_VAR_CREATION), 101 average_runs(STAT_VAR_FROM_ENV)); 102 fprintf(stderr, "Local hash max: %lu, global hash max: %lu, average local: %f\n", 103 STAT_VAR_HASH_MAXSIZE, 104 STAT_VAR_GHASH_MAXSIZE, 105 (float)STAT_VAR_POWER/STAT_VAR_HASH_CREATION); 106 #endif 107 #ifdef STATS_GN_CREATION 108 fprintf(stderr, "Average GN: %f\n", average_runs(STAT_GN_COUNT)); 109 #endif 110 #ifdef STATS_BUF 111 fprintf(stderr, "Buf tot: %f, def: %f, exp %f, weird %f, bad %f\n", 112 average_runs(STAT_TOTAL_BUFS), 113 average_runs(STAT_DEFAULT_BUFS), 114 average_runs(STAT_BUFS_EXPANSION), 115 average_runs(STAT_WEIRD_BUFS), 116 average_runs(STAT_WEIRD_INEFFICIENT)); 117 #endif 118 #ifdef STATS_HASH 119 fprintf(stderr, "Hashes new: %f, exp: %f, lookup %f, l: %f, +: %f, ent : %f\n", 120 average_runs(STAT_HASH_CREATION), 121 average_runs(STAT_HASH_EXPAND), 122 average_runs(STAT_HASH_LOOKUP), 123 (float)STAT_HASH_LENGTH/STAT_HASH_LOOKUP, 124 (float)STAT_HASH_POSITIVE/STAT_HASH_LOOKUP, 125 (float)STAT_HASH_ENTRIES/STAT_HASH_SIZE); 126 #endif 127 #ifdef STATS_GROW 128 fprintf(stderr, "Grow: %f\n", average_runs(STAT_GROWARRAY)); 129 #endif 130 if (mmapped) 131 munmap(statarray, STAT_NUMBER * sizeof(unsigned long)); 132 } 133 134 void 135 Init_Stats() 136 { 137 char *name; 138 int fd; 139 140 /* try to get ahold of a stats collecting file */ 141 name = getenv("MAKESTATS"); 142 if (name) { 143 while ((fd = open(name, O_RDWR)) == -1) { 144 /* if collecting file does not already exist, fill it with 145 * zeros (so all stats starting values should be 0) */ 146 unsigned long n; 147 int i; 148 FILE *f; 149 150 f = fopen(name, "w"); 151 152 n = 0; 153 for (i = 0; i < STAT_NUMBER; i++) 154 fwrite(&n, sizeof(unsigned long), 1, f); 155 fclose(f); 156 } 157 158 /* either we've got the file -> share it across makes */ 159 if (fd) { 160 statarray = mmap(0, STAT_NUMBER * sizeof(unsigned long), 161 PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0); 162 if (statarray == MAP_FAILED) 163 exit(1); 164 mmapped = true; 165 } 166 } else 167 /* or we don't -> simple stats gathering */ 168 statarray = ecalloc(sizeof(unsigned long), STAT_NUMBER); 169 STAT_INVOCATIONS++; 170 atexit(print_stats); 171 } 172 173 #endif 174 175