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e4e6a8db | 1 | |
2 | /* | |
e6ccf245 | 3 | * $Id: refresh.cc,v 1.58 2002/10/13 20:35:03 robertc Exp $ |
e4e6a8db | 4 | * |
5 | * DEBUG: section 22 Refresh Calculation | |
6 | * AUTHOR: Harvest Derived | |
7 | * | |
2b6662ba | 8 | * SQUID Web Proxy Cache http://www.squid-cache.org/ |
e25c139f | 9 | * ---------------------------------------------------------- |
e4e6a8db | 10 | * |
2b6662ba | 11 | * Squid is the result of efforts by numerous individuals from |
12 | * the Internet community; see the CONTRIBUTORS file for full | |
13 | * details. Many organizations have provided support for Squid's | |
14 | * development; see the SPONSORS file for full details. Squid is | |
15 | * Copyrighted (C) 2001 by the Regents of the University of | |
16 | * California; see the COPYRIGHT file for full details. Squid | |
17 | * incorporates software developed and/or copyrighted by other | |
18 | * sources; see the CREDITS file for full details. | |
e4e6a8db | 19 | * |
20 | * This program is free software; you can redistribute it and/or modify | |
21 | * it under the terms of the GNU General Public License as published by | |
22 | * the Free Software Foundation; either version 2 of the License, or | |
23 | * (at your option) any later version. | |
24 | * | |
25 | * This program is distributed in the hope that it will be useful, | |
26 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
27 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
28 | * GNU General Public License for more details. | |
29 | * | |
30 | * You should have received a copy of the GNU General Public License | |
31 | * along with this program; if not, write to the Free Software | |
cbdec147 | 32 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA. |
e25c139f | 33 | * |
e4e6a8db | 34 | */ |
35 | ||
36 | #ifndef USE_POSIX_REGEX | |
37 | #define USE_POSIX_REGEX /* put before includes; always use POSIX */ | |
38 | #endif | |
39 | ||
40 | #include "squid.h" | |
e6ccf245 | 41 | #include "Store.h" |
e4e6a8db | 42 | |
7d47d8e6 | 43 | typedef enum { |
65fa5c61 | 44 | rcHTTP, |
45 | rcICP, | |
46 | #if USE_HTCP | |
47 | rcHTCP, | |
48 | #endif | |
49 | #if USE_CACHE_DIGESTS | |
50 | rcCDigest, | |
51 | #endif | |
52 | rcStore, | |
53 | rcCount | |
7d47d8e6 | 54 | } refreshCountsEnum; |
829a9357 | 55 | |
65fa5c61 | 56 | typedef struct { |
57 | unsigned int expires:1; | |
58 | unsigned int min:1; | |
59 | unsigned int lmfactor:1; | |
60 | unsigned int max; | |
61 | } stale_flags; | |
62 | ||
63 | /* | |
64 | * This enumerated list assigns specific values, ala HTTP/FTP status | |
65 | * codes. All Fresh codes are in the range 100-199 and all stale | |
66 | * codes are 200-299. We might want to use these codes in logging, | |
67 | * so best to keep them consistent over time. | |
68 | */ | |
69 | enum { | |
70 | FRESH_REQUEST_MAX_STALE_ALL = 100, | |
71 | FRESH_REQUEST_MAX_STALE_VALUE, | |
72 | FRESH_EXPIRES, | |
73 | FRESH_LMFACTOR_RULE, | |
74 | FRESH_MIN_RULE, | |
75 | FRESH_OVERRIDE_EXPIRES, | |
76 | FRESH_OVERRIDE_LASTMOD, | |
77 | STALE_MUST_REVALIDATE = 200, | |
78 | STALE_RELOAD_INTO_IMS, | |
79 | STALE_FORCED_RELOAD, | |
80 | STALE_EXCEEDS_REQUEST_MAX_AGE_VALUE, | |
81 | STALE_EXPIRES, | |
82 | STALE_MAX_RULE, | |
83 | STALE_LMFACTOR_RULE, | |
84 | STALE_DEFAULT = 299 | |
85 | }; | |
86 | ||
829a9357 | 87 | static struct RefreshCounts { |
88 | const char *proto; | |
1c3e77cd | 89 | int total; |
65fa5c61 | 90 | int status[STALE_DEFAULT + 1]; |
829a9357 | 91 | } refreshCounts[rcCount]; |
1c3e77cd | 92 | |
e4e6a8db | 93 | /* |
94 | * Defaults: | |
95 | * MIN NONE | |
96 | * PCT 20% | |
97 | * MAX 3 days | |
98 | */ | |
48f44632 | 99 | #define REFRESH_DEFAULT_MIN (time_t)0 |
c3f6d204 | 100 | #define REFRESH_DEFAULT_PCT 0.20 |
48f44632 | 101 | #define REFRESH_DEFAULT_MAX (time_t)259200 |
e4e6a8db | 102 | |
0cdcddb9 | 103 | static const refresh_t *refreshLimits(const char *); |
2b5133db | 104 | static const refresh_t *refreshUncompiledPattern(const char *); |
1c3e77cd | 105 | static OBJH refreshStats; |
65fa5c61 | 106 | static int refreshStaleness(const StoreEntry *, time_t, time_t, const refresh_t *, stale_flags *); |
107 | ||
108 | static refresh_t DefaultRefresh; | |
2b5133db | 109 | |
6018f0de | 110 | static const refresh_t * |
111 | refreshLimits(const char *url) | |
112 | { | |
113 | const refresh_t *R; | |
114 | for (R = Config.Refresh; R; R = R->next) { | |
115 | if (!regexec(&(R->compiled_pattern), url, 0, 0, 0)) | |
116 | return R; | |
117 | } | |
118 | return NULL; | |
119 | } | |
120 | ||
2b5133db | 121 | static const refresh_t * |
122 | refreshUncompiledPattern(const char *pat) | |
123 | { | |
124 | const refresh_t *R; | |
125 | for (R = Config.Refresh; R; R = R->next) { | |
126 | if (0 == strcmp(R->pattern, pat)) | |
127 | return R; | |
128 | } | |
129 | return NULL; | |
130 | } | |
131 | ||
65fa5c61 | 132 | /* |
133 | * Calculate how stale the response is (or will be at the check_time). | |
134 | * Staleness calculation is based on the following: (1) response | |
135 | * expiration time, (2) age greater than configured maximum, (3) | |
136 | * last-modified factor, and (4) age less than configured minimum. | |
137 | * | |
138 | * If the response is fresh, return -1. Otherwise return its | |
139 | * staleness. NOTE return value of 0 means the response is stale. | |
140 | * | |
141 | * The 'stale_flags' structure is used to tell the calling function | |
142 | * _why_ this response is fresh or stale. Its used, for example, | |
143 | * when the admin wants to override expiration and last-modified | |
144 | * times. | |
145 | */ | |
146 | static int | |
147 | refreshStaleness(const StoreEntry * entry, time_t check_time, time_t age, const refresh_t * R, stale_flags * sf) | |
148 | { | |
149 | /* | |
150 | * Check for an explicit expiration time. | |
151 | */ | |
152 | if (entry->expires > -1) { | |
153 | sf->expires = 1; | |
154 | if (entry->expires > check_time) { | |
155 | debug(22, 3) ("FRESH: expires %d >= check_time %d \n", | |
156 | (int) entry->expires, (int) check_time); | |
157 | return -1; | |
158 | } else { | |
159 | debug(22, 3) ("STALE: expires %d < check_time %d \n", | |
160 | (int) entry->expires, (int) check_time); | |
161 | return (check_time - entry->expires); | |
162 | } | |
163 | } | |
164 | assert(age >= 0); | |
165 | /* | |
166 | * Use local heuristics to determine staleness. Start with the | |
167 | * max age from the refresh_pattern rule. | |
168 | */ | |
169 | if (age > R->max) { | |
170 | debug(22, 3) ("STALE: age %d > max %d \n", (int) age, (int) R->max); | |
171 | sf->max = 1; | |
172 | return (age - R->max); | |
173 | } | |
174 | /* | |
175 | * Try the last-modified factor algorithm. | |
176 | */ | |
177 | if (entry->lastmod > -1 && entry->timestamp > entry->lastmod) { | |
178 | /* | |
179 | * stale_age is the Age of the response when it became/becomes | |
180 | * stale according to the last-modified factor algorithm. | |
181 | */ | |
e6ccf245 | 182 | time_t stale_age = static_cast<time_t>((entry->timestamp - entry->lastmod) * R->pct); |
65fa5c61 | 183 | sf->lmfactor = 1; |
184 | if (age >= stale_age) { | |
185 | debug(22, 3) ("STALE: age %d > stale_age %d\n", | |
186 | (int) age, (int) stale_age); | |
187 | return (age - stale_age); | |
188 | } else { | |
189 | debug(22, 3) ("FRESH: age %d <= stale_age %d\n", | |
190 | (int) age, (int) stale_age); | |
191 | return -1; | |
192 | } | |
193 | } | |
194 | /* | |
195 | * If we are here, staleness is determined by the refresh_pattern | |
196 | * configured minimum age. | |
197 | */ | |
198 | if (age <= R->min) { | |
199 | debug(22, 3) ("FRESH: age %d <= min %d\n", (int) age, (int) R->min); | |
200 | sf->min = 1; | |
201 | return -1; | |
202 | } | |
203 | debug(22, 3) ("STALE: age %d > min %d\n", (int) age, (int) R->min); | |
204 | return (age - R->min); | |
205 | } | |
206 | ||
829a9357 | 207 | /* return 1 if the entry must be revalidated within delta seconds |
208 | * 0 otherwise | |
209 | * | |
210 | * note: request maybe null (e.g. for cache digests build) | |
e4e6a8db | 211 | */ |
829a9357 | 212 | static int |
65fa5c61 | 213 | refreshCheck(const StoreEntry * entry, request_t * request, time_t delta) |
e4e6a8db | 214 | { |
6018f0de | 215 | const refresh_t *R; |
829a9357 | 216 | const char *uri = NULL; |
65fa5c61 | 217 | time_t age = 0; |
a207429f | 218 | time_t check_time = squid_curtime + delta; |
65fa5c61 | 219 | int staleness; |
220 | stale_flags sf; | |
9b5d1d21 | 221 | if (entry->mem_obj) |
222 | uri = entry->mem_obj->url; | |
7d47d8e6 | 223 | else if (request) |
9b5d1d21 | 224 | uri = urlCanonical(request); |
7d47d8e6 | 225 | |
65fa5c61 | 226 | debug(22, 3) ("refreshCheck: '%s'\n", uri ? uri : "<none>"); |
227 | ||
228 | if (check_time > entry->timestamp) | |
229 | age = check_time - entry->timestamp; | |
230 | R = uri ? refreshLimits(uri) : refreshUncompiledPattern("."); | |
231 | if (NULL == R) | |
232 | R = &DefaultRefresh; | |
233 | memset(&sf, '\0', sizeof(sf)); | |
234 | staleness = refreshStaleness(entry, check_time, age, R, &sf); | |
235 | debug(22, 3) ("Staleness = %d\n", staleness); | |
236 | ||
a3d5953d | 237 | debug(22, 3) ("refreshCheck: Matched '%s %d %d%% %d'\n", |
65fa5c61 | 238 | R->pattern, (int) R->min, (int) (100.0 * R->pct), (int) R->max); |
a3d5953d | 239 | debug(22, 3) ("refreshCheck: age = %d\n", (int) age); |
49d3fcb0 | 240 | debug(22, 3) ("\tcheck_time:\t%s\n", mkrfc1123(check_time)); |
241 | debug(22, 3) ("\tentry->timestamp:\t%s\n", mkrfc1123(entry->timestamp)); | |
65fa5c61 | 242 | |
243 | if (EBIT_TEST(entry->flags, ENTRY_REVALIDATE) && staleness > -1) { | |
244 | debug(22, 3) ("refreshCheck: YES: Must revalidate stale response\n"); | |
245 | return STALE_MUST_REVALIDATE; | |
246 | } | |
829a9357 | 247 | /* request-specific checks */ |
248 | if (request) { | |
65fa5c61 | 249 | HttpHdrCc *cc = request->cache_control; |
9f60cfdf | 250 | #if HTTP_VIOLATIONS |
65fa5c61 | 251 | if (!request->flags.nocache_hack) { |
252 | (void) 0; | |
253 | } else if (R->flags.ignore_reload) { | |
254 | /* The clients no-cache header is ignored */ | |
255 | debug(22, 3) ("refreshCheck: MAYBE: ignore-reload\n"); | |
256 | } else if (R->flags.reload_into_ims || Config.onoff.reload_into_ims) { | |
257 | /* The clients no-cache header is changed into a IMS query */ | |
258 | debug(22, 3) ("refreshCheck: YES: reload-into-ims\n"); | |
259 | return STALE_RELOAD_INTO_IMS; | |
260 | } else { | |
261 | /* The clients no-cache header is not overridden on this request */ | |
262 | debug(22, 3) ("refreshCheck: YES: client reload\n"); | |
263 | request->flags.nocache = 1; | |
264 | return STALE_FORCED_RELOAD; | |
cbe3a719 | 265 | } |
9f60cfdf | 266 | #endif |
65fa5c61 | 267 | if (NULL != cc) { |
268 | if (cc->max_age > -1) { | |
085008f9 | 269 | #if HTTP_VIOLATIONS |
270 | if (R->flags.ignore_reload && cc->max_age == 0) { | |
271 | } else | |
272 | #endif | |
65fa5c61 | 273 | if (age > cc->max_age) { |
274 | debug(22, 3) ("refreshCheck: YES: age > client-max-age\n"); | |
275 | return STALE_EXCEEDS_REQUEST_MAX_AGE_VALUE; | |
276 | } | |
277 | } | |
278 | if (EBIT_TEST(cc->mask, CC_MAX_STALE) && staleness > -1) { | |
279 | if (cc->max_stale < 0) { | |
280 | /* max-stale directive without a value */ | |
281 | debug(22, 3) ("refreshCheck: NO: max-stale wildcard\n"); | |
282 | return FRESH_REQUEST_MAX_STALE_ALL; | |
283 | } else if (staleness < cc->max_stale) { | |
284 | debug(22, 3) ("refreshCheck: NO: staleness < max-stale\n"); | |
285 | return FRESH_REQUEST_MAX_STALE_VALUE; | |
286 | } | |
829a9357 | 287 | } |
48f44632 | 288 | } |
289 | } | |
65fa5c61 | 290 | if (-1 == staleness) { |
291 | if (sf.expires) | |
292 | return FRESH_EXPIRES; | |
293 | assert(!sf.max); | |
294 | if (sf.lmfactor) | |
295 | return FRESH_LMFACTOR_RULE; | |
296 | assert(sf.min); | |
297 | return FRESH_MIN_RULE; | |
1dfa1d81 | 298 | } |
65fa5c61 | 299 | /* |
300 | * At this point the response is stale, unless one of | |
542c4d60 | 301 | * the override options kicks in. |
65fa5c61 | 302 | */ |
303 | if (sf.expires) { | |
304 | #if HTTP_VIOLATIONS | |
305 | if (R->flags.override_expire && age < R->min) { | |
306 | debug(22, 3) ("refreshCheck: NO: age < min && override-expire\n"); | |
307 | return FRESH_OVERRIDE_EXPIRES; | |
34308e0f | 308 | } |
65fa5c61 | 309 | #endif |
310 | return STALE_EXPIRES; | |
e4e6a8db | 311 | } |
65fa5c61 | 312 | if (sf.max) |
313 | return STALE_MAX_RULE; | |
314 | if (sf.lmfactor) { | |
9f60cfdf | 315 | #if HTTP_VIOLATIONS |
65fa5c61 | 316 | if (R->flags.override_lastmod && age < R->min) { |
317 | debug(22, 3) ("refreshCheck: NO: age < min && override-lastmod\n"); | |
318 | return FRESH_OVERRIDE_LASTMOD; | |
0d508d5b | 319 | } |
65fa5c61 | 320 | #endif |
321 | return STALE_LMFACTOR_RULE; | |
e4e6a8db | 322 | } |
65fa5c61 | 323 | return STALE_DEFAULT; |
e4e6a8db | 324 | } |
48f44632 | 325 | |
cfa9f1cb | 326 | int |
327 | refreshIsCachable(const StoreEntry * entry) | |
328 | { | |
329 | /* | |
330 | * Don't look at the request to avoid no-cache and other nuisances. | |
331 | * the object should have a mem_obj so the URL will be found there. | |
332 | * 60 seconds delta, to avoid objects which expire almost | |
333 | * immediately, and which can't be refreshed. | |
334 | */ | |
65fa5c61 | 335 | int reason = refreshCheck(entry, NULL, 60); |
336 | refreshCounts[rcStore].total++; | |
337 | refreshCounts[rcStore].status[reason]++; | |
338 | if (reason < 200) | |
cfa9f1cb | 339 | /* Does not need refresh. This is certainly cachable */ |
340 | return 1; | |
341 | if (entry->lastmod < 0) | |
342 | /* Last modified is needed to do a refresh */ | |
343 | return 0; | |
344 | if (entry->mem_obj == NULL) | |
345 | /* no mem_obj? */ | |
346 | return 1; | |
49dd3c2c | 347 | if (entry->mem_obj->reply == NULL) |
cfa9f1cb | 348 | /* no reply? */ |
349 | return 1; | |
350 | if (entry->mem_obj->reply->content_length == 0) | |
351 | /* No use refreshing (caching?) 0 byte objects */ | |
352 | return 0; | |
353 | /* This seems to be refreshable. Cache it */ | |
354 | return 1; | |
355 | } | |
356 | ||
829a9357 | 357 | /* refreshCheck... functions below are protocol-specific wrappers around |
358 | * refreshCheck() function above */ | |
359 | ||
360 | int | |
7d47d8e6 | 361 | refreshCheckHTTP(const StoreEntry * entry, request_t * request) |
362 | { | |
65fa5c61 | 363 | int reason = refreshCheck(entry, request, 0); |
364 | refreshCounts[rcHTTP].total++; | |
365 | refreshCounts[rcHTTP].status[reason]++; | |
366 | return (reason < 200) ? 0 : 1; | |
829a9357 | 367 | } |
368 | ||
369 | int | |
7d47d8e6 | 370 | refreshCheckICP(const StoreEntry * entry, request_t * request) |
371 | { | |
65fa5c61 | 372 | int reason = refreshCheck(entry, request, 30); |
373 | refreshCounts[rcICP].total++; | |
374 | refreshCounts[rcICP].status[reason]++; | |
375 | return (reason < 200) ? 0 : 1; | |
829a9357 | 376 | } |
377 | ||
65fa5c61 | 378 | #if USE_HTCP |
32b3cf93 | 379 | int |
380 | refreshCheckHTCP(const StoreEntry * entry, request_t * request) | |
381 | { | |
65fa5c61 | 382 | int reason = refreshCheck(entry, request, 10); |
383 | refreshCounts[rcHTCP].total++; | |
384 | refreshCounts[rcHTCP].status[reason]++; | |
385 | return (reason < 200) ? 0 : 1; | |
32b3cf93 | 386 | } |
65fa5c61 | 387 | #endif |
32b3cf93 | 388 | |
65fa5c61 | 389 | #if USE_CACHE_DIGESTS |
829a9357 | 390 | int |
7d47d8e6 | 391 | refreshCheckDigest(const StoreEntry * entry, time_t delta) |
392 | { | |
65fa5c61 | 393 | int reason = refreshCheck(entry, |
c68e9c6b | 394 | entry->mem_obj ? entry->mem_obj->request : NULL, |
65fa5c61 | 395 | delta); |
396 | refreshCounts[rcCDigest].total++; | |
397 | refreshCounts[rcCDigest].status[reason]++; | |
398 | return (reason < 200) ? 0 : 1; | |
6018f0de | 399 | } |
65fa5c61 | 400 | #endif |
6018f0de | 401 | |
48f44632 | 402 | time_t |
403 | getMaxAge(const char *url) | |
404 | { | |
6018f0de | 405 | const refresh_t *R; |
a3d5953d | 406 | debug(22, 3) ("getMaxAge: '%s'\n", url); |
6018f0de | 407 | if ((R = refreshLimits(url))) |
408 | return R->max; | |
409 | else | |
410 | return REFRESH_DEFAULT_MAX; | |
48f44632 | 411 | } |
1c3e77cd | 412 | |
829a9357 | 413 | static void |
414 | refreshCountsStats(StoreEntry * sentry, struct RefreshCounts *rc) | |
415 | { | |
cc7cfa8e | 416 | int sum = 0; |
417 | int tot = rc->total; | |
418 | ||
829a9357 | 419 | storeAppendPrintf(sentry, "\n\n%s histogram:\n", rc->proto); |
65fa5c61 | 420 | storeAppendPrintf(sentry, "Count\t%%Total\tCategory\n"); |
829a9357 | 421 | |
65fa5c61 | 422 | #define refreshCountsStatsEntry(code,desc) { \ |
423 | storeAppendPrintf(sentry, "%6d\t%6.2f\t%s\n", \ | |
424 | rc->status[code], xpercent(rc->status[code], tot), desc); \ | |
425 | sum += rc->status[code]; \ | |
cc7cfa8e | 426 | } |
65fa5c61 | 427 | |
428 | refreshCountsStatsEntry(FRESH_REQUEST_MAX_STALE_ALL, | |
429 | "Fresh: request max-stale wildcard"); | |
430 | refreshCountsStatsEntry(FRESH_REQUEST_MAX_STALE_VALUE, | |
431 | "Fresh: request max-stale value"); | |
432 | refreshCountsStatsEntry(FRESH_EXPIRES, | |
433 | "Fresh: expires time not reached"); | |
434 | refreshCountsStatsEntry(FRESH_LMFACTOR_RULE, | |
435 | "Fresh: refresh_pattern last-mod factor percentage"); | |
436 | refreshCountsStatsEntry(FRESH_MIN_RULE, | |
437 | "Fresh: refresh_pattern min value"); | |
438 | refreshCountsStatsEntry(FRESH_OVERRIDE_EXPIRES, | |
439 | "Fresh: refresh_pattern override expires"); | |
440 | refreshCountsStatsEntry(FRESH_OVERRIDE_LASTMOD, | |
441 | "Fresh: refresh_pattern override lastmod"); | |
442 | refreshCountsStatsEntry(STALE_MUST_REVALIDATE, | |
443 | "Stale: response has must-revalidate"); | |
444 | refreshCountsStatsEntry(STALE_RELOAD_INTO_IMS, | |
445 | "Stale: changed reload into IMS"); | |
446 | refreshCountsStatsEntry(STALE_FORCED_RELOAD, | |
447 | "Stale: request has no-cache directive"); | |
448 | refreshCountsStatsEntry(STALE_EXCEEDS_REQUEST_MAX_AGE_VALUE, | |
449 | "Stale: age exceeds request max-age value"); | |
450 | refreshCountsStatsEntry(STALE_EXPIRES, | |
451 | "Stale: expires time reached"); | |
452 | refreshCountsStatsEntry(STALE_MAX_RULE, | |
453 | "Stale: refresh_pattern max age rule"); | |
454 | refreshCountsStatsEntry(STALE_LMFACTOR_RULE, | |
455 | "Stale: refresh_pattern last-mod factor percentage"); | |
456 | refreshCountsStatsEntry(STALE_DEFAULT, | |
457 | "Stale: by default"); | |
458 | ||
7d47d8e6 | 459 | tot = sum; /* paranoid: "total" line shows 100% if we forgot nothing */ |
65fa5c61 | 460 | storeAppendPrintf(sentry, "%6d\t%6.2f\tTOTAL\n", |
461 | rc->total, xpercent(rc->total, tot)); | |
462 | \ | |
463 | storeAppendPrintf(sentry, "\n"); | |
829a9357 | 464 | } |
465 | ||
1c3e77cd | 466 | static void |
467 | refreshStats(StoreEntry * sentry) | |
468 | { | |
829a9357 | 469 | int i; |
470 | int total = 0; | |
471 | ||
472 | /* get total usage count */ | |
473 | for (i = 0; i < rcCount; ++i) | |
474 | total += refreshCounts[i].total; | |
475 | ||
476 | /* protocol usage histogram */ | |
477 | storeAppendPrintf(sentry, "\nRefreshCheck calls per protocol\n\n"); | |
478 | storeAppendPrintf(sentry, "Protocol\t#Calls\t%%Calls\n"); | |
479 | for (i = 0; i < rcCount; ++i) | |
480 | storeAppendPrintf(sentry, "%10s\t%6d\t%6.2f\n", | |
481 | refreshCounts[i].proto, | |
7d47d8e6 | 482 | refreshCounts[i].total, |
829a9357 | 483 | xpercent(refreshCounts[i].total, total)); |
484 | ||
485 | /* per protocol histograms */ | |
486 | storeAppendPrintf(sentry, "\n\nRefreshCheck histograms for various protocols\n"); | |
487 | for (i = 0; i < rcCount; ++i) | |
42125db6 | 488 | refreshCountsStats(sentry, &refreshCounts[i]); |
1c3e77cd | 489 | } |
490 | ||
491 | void | |
9bc73deb | 492 | refreshInit(void) |
1c3e77cd | 493 | { |
829a9357 | 494 | memset(refreshCounts, 0, sizeof(refreshCounts)); |
495 | refreshCounts[rcHTTP].proto = "HTTP"; | |
496 | refreshCounts[rcICP].proto = "ICP"; | |
65fa5c61 | 497 | #if USE_HTCP |
32b3cf93 | 498 | refreshCounts[rcHTCP].proto = "HTCP"; |
65fa5c61 | 499 | #endif |
cfa9f1cb | 500 | refreshCounts[rcStore].proto = "On Store"; |
65fa5c61 | 501 | #if USE_CACHE_DIGESTS |
829a9357 | 502 | refreshCounts[rcCDigest].proto = "Cache Digests"; |
65fa5c61 | 503 | #endif |
1c3e77cd | 504 | cachemgrRegister("refresh", |
505 | "Refresh Algorithm Statistics", | |
506 | refreshStats, | |
507 | 0, | |
508 | 1); | |
65fa5c61 | 509 | memset(&DefaultRefresh, '\0', sizeof(DefaultRefresh)); |
510 | DefaultRefresh.pattern = "<none>"; | |
511 | DefaultRefresh.min = REFRESH_DEFAULT_MIN; | |
512 | DefaultRefresh.pct = REFRESH_DEFAULT_PCT; | |
513 | DefaultRefresh.max = REFRESH_DEFAULT_MAX; | |
1c3e77cd | 514 | } |