1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright 2006 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 * 26 * stats.c -- simple stats tracking table module 27 * 28 */ 29 30 #pragma ident "%Z%%M% %I% %E% SMI" 31 32 #include <sys/types.h> 33 #include <strings.h> 34 #include "stats.h" 35 #include "alloc.h" 36 #include "out.h" 37 38 struct stats { 39 struct stats *next; 40 const char *name; 41 const char *desc; 42 enum stats_type { 43 STATS_COUNTER = 3000, 44 STATS_ELAPSE, 45 STATS_STRING 46 } t; 47 union { 48 int counter; 49 struct { 50 hrtime_t start; 51 hrtime_t stop; 52 } elapse; 53 const char *string; 54 } u; 55 }; 56 57 static int Ext; /* true if extended stats are enabled */ 58 static struct stats *Statslist; 59 static struct stats *Laststats; 60 61 62 /* 63 * stats_init -- initialize the stats module 64 * 65 */ 66 67 void 68 stats_init(int ext) 69 { 70 Ext = ext; 71 } 72 73 void 74 stats_fini(void) 75 { 76 } 77 78 static struct stats * 79 stats_new(const char *name, const char *desc, enum stats_type t) 80 { 81 struct stats *ret = MALLOC(sizeof (*ret)); 82 83 bzero(ret, sizeof (*ret)); 84 ret->t = t; 85 ret->name = STRDUP(name); 86 ret->desc = STRDUP(desc); 87 88 if (Laststats == NULL) 89 Statslist = ret; 90 else 91 Laststats->next = ret; 92 Laststats = ret; 93 94 return (ret); 95 } 96 97 void 98 stats_delete(struct stats *sp) 99 { 100 struct stats *p, *s; 101 102 if (sp == NULL) 103 return; 104 105 for (p = NULL, s = Statslist; s != NULL; s = s->next) 106 if (s == sp) 107 break; 108 109 if (s == NULL) 110 return; 111 112 if (p == NULL) 113 Statslist = s->next; 114 else 115 p->next = s->next; 116 117 if (s == Laststats) 118 Laststats = p; 119 120 FREE((void *)sp->name); 121 FREE((void *)sp->desc); 122 FREE(sp); 123 } 124 125 struct stats * 126 stats_new_counter(const char *name, const char *desc, int ext) 127 { 128 if (ext && !Ext) 129 return (NULL); /* extended stats not enabled */ 130 131 return (stats_new(name, desc, STATS_COUNTER)); 132 } 133 134 void 135 stats_counter_bump(struct stats *sp) 136 { 137 if (sp == NULL) 138 return; 139 140 ASSERT(sp->t == STATS_COUNTER); 141 142 sp->u.counter++; 143 } 144 145 void 146 stats_counter_add(struct stats *sp, int n) 147 { 148 if (sp == NULL) 149 return; 150 151 ASSERT(sp->t == STATS_COUNTER); 152 153 sp->u.counter += n; 154 } 155 156 void 157 stats_counter_reset(struct stats *sp) 158 { 159 if (sp == NULL) 160 return; 161 162 ASSERT(sp->t == STATS_COUNTER); 163 164 sp->u.counter = 0; 165 } 166 167 int 168 stats_counter_value(struct stats *sp) 169 { 170 if (sp == NULL) 171 return (0); 172 173 ASSERT(sp->t == STATS_COUNTER); 174 175 return (sp->u.counter); 176 } 177 178 struct stats * 179 stats_new_elapse(const char *name, const char *desc, int ext) 180 { 181 if (ext && !Ext) 182 return (NULL); /* extended stats not enabled */ 183 184 return (stats_new(name, desc, STATS_ELAPSE)); 185 } 186 187 void 188 stats_elapse_start(struct stats *sp) 189 { 190 if (sp == NULL) 191 return; 192 193 ASSERT(sp->t == STATS_ELAPSE); 194 195 sp->u.elapse.start = gethrtime(); 196 } 197 198 void 199 stats_elapse_stop(struct stats *sp) 200 { 201 if (sp == NULL) 202 return; 203 204 ASSERT(sp->t == STATS_ELAPSE); 205 206 sp->u.elapse.stop = gethrtime(); 207 } 208 209 struct stats * 210 stats_new_string(const char *name, const char *desc, int ext) 211 { 212 if (ext && !Ext) 213 return (NULL); /* extended stats not enabled */ 214 215 return (stats_new(name, desc, STATS_STRING)); 216 } 217 218 void 219 stats_string_set(struct stats *sp, const char *s) 220 { 221 if (sp == NULL) 222 return; 223 224 ASSERT(sp->t == STATS_STRING); 225 226 sp->u.string = s; 227 } 228 229 /* 230 * stats_publish -- spew all stats 231 * 232 */ 233 234 void 235 stats_publish(void) 236 { 237 struct stats *sp; 238 239 for (sp = Statslist; sp; sp = sp->next) 240 switch (sp->t) { 241 case STATS_COUNTER: 242 out(O_OK, "%32s %13d %s", sp->name, 243 sp->u.counter, sp->desc); 244 break; 245 246 case STATS_ELAPSE: 247 if (sp->u.elapse.start && sp->u.elapse.stop) { 248 hrtime_t delta = 249 sp->u.elapse.stop - sp->u.elapse.start; 250 251 out(O_OK, "%32s %11lldns %s", sp->name, 252 delta, sp->desc); 253 } 254 break; 255 256 case STATS_STRING: 257 out(O_OK, "%32s %13s %s", sp->name, sp->u.string, 258 sp->desc); 259 break; 260 261 default: 262 out(O_DIE, "stats_publish: unknown type %d", sp->t); 263 } 264 } 265