78ed81a3 |
1 | /*- |
2 | * Copyright (c) 1990, 1993 |
3 | * The Regents of the University of California. All rights reserved. |
4 | * |
5 | * This code is derived from software contributed to Berkeley by |
6 | * Mike Olson. |
7 | * |
8 | * Redistribution and use in source and binary forms, with or without |
9 | * modification, are permitted provided that the following conditions |
10 | * are met: |
11 | * 1. Redistributions of source code must retain the above copyright |
12 | * notice, this list of conditions and the following disclaimer. |
13 | * 2. Redistributions in binary form must reproduce the above copyright |
14 | * notice, this list of conditions and the following disclaimer in the |
15 | * documentation and/or other materials provided with the distribution. |
16 | * 3. All advertising materials mentioning features or use of this software |
17 | * must display the following acknowledgement: |
18 | * This product includes software developed by the University of |
19 | * California, Berkeley and its contributors. |
20 | * 4. Neither the name of the University nor the names of its contributors |
21 | * may be used to endorse or promote products derived from this software |
22 | * without specific prior written permission. |
23 | * |
24 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
25 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
26 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
27 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
28 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
29 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
30 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
31 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
32 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
33 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
34 | * SUCH DAMAGE. |
35 | */ |
36 | |
37 | #if defined(LIBC_SCCS) && !defined(lint) |
38 | static char sccsid[] = "@(#)bt_debug.c 8.1 (Berkeley) 6/4/93"; |
39 | #endif /* LIBC_SCCS and not lint */ |
40 | |
41 | #include <sys/param.h> |
42 | |
43 | #include <stdio.h> |
44 | #include <stdlib.h> |
45 | #include <string.h> |
46 | |
47 | #include <db.h> |
48 | #include "btree.h" |
49 | |
50 | #ifdef DEBUG |
51 | /* |
52 | * BT_DUMP -- Dump the tree |
53 | * |
54 | * Parameters: |
55 | * dbp: pointer to the DB |
56 | */ |
57 | void |
58 | __bt_dump(dbp) |
59 | DB *dbp; |
60 | { |
61 | BTREE *t; |
62 | PAGE *h; |
63 | pgno_t i; |
64 | char *sep; |
65 | |
66 | t = dbp->internal; |
67 | (void)fprintf(stderr, "%s: pgsz %d", |
68 | ISSET(t, B_INMEM) ? "memory" : "disk", t->bt_psize); |
69 | if (ISSET(t, R_RECNO)) |
70 | (void)fprintf(stderr, " keys %lu", t->bt_nrecs); |
71 | #undef X |
72 | #define X(flag, name) \ |
73 | if (ISSET(t, flag)) { \ |
74 | (void)fprintf(stderr, "%s%s", sep, name); \ |
75 | sep = ", "; \ |
76 | } |
77 | if (t->bt_flags) { |
78 | sep = " flags ("; |
79 | X(B_DELCRSR, "DELCRSR"); |
80 | X(R_FIXLEN, "FIXLEN"); |
81 | X(B_INMEM, "INMEM"); |
82 | X(B_NODUPS, "NODUPS"); |
83 | X(B_RDONLY, "RDONLY"); |
84 | X(R_RECNO, "RECNO"); |
85 | X(B_SEQINIT, "SEQINIT"); |
86 | X(B_METADIRTY,"METADIRTY"); |
87 | (void)fprintf(stderr, ")\n"); |
88 | } |
89 | #undef X |
90 | |
91 | for (i = P_ROOT; (h = mpool_get(t->bt_mp, i, 0)) != NULL; ++i) { |
92 | __bt_dpage(h); |
93 | (void)mpool_put(t->bt_mp, h, 0); |
94 | } |
95 | } |
96 | |
97 | /* |
98 | * BT_DMPAGE -- Dump the meta page |
99 | * |
100 | * Parameters: |
101 | * h: pointer to the PAGE |
102 | */ |
103 | void |
104 | __bt_dmpage(h) |
105 | PAGE *h; |
106 | { |
107 | BTMETA *m; |
108 | char *sep; |
109 | |
110 | m = (BTMETA *)h; |
111 | (void)fprintf(stderr, "magic %lx\n", m->m_magic); |
112 | (void)fprintf(stderr, "version %lu\n", m->m_version); |
113 | (void)fprintf(stderr, "psize %lu\n", m->m_psize); |
114 | (void)fprintf(stderr, "free %lu\n", m->m_free); |
115 | (void)fprintf(stderr, "nrecs %lu\n", m->m_nrecs); |
116 | (void)fprintf(stderr, "flags %lu", m->m_flags); |
117 | #undef X |
118 | #define X(flag, name) \ |
119 | if (m->m_flags & flag) { \ |
120 | (void)fprintf(stderr, "%s%s", sep, name); \ |
121 | sep = ", "; \ |
122 | } |
123 | if (m->m_flags) { |
124 | sep = " ("; |
125 | X(B_NODUPS, "NODUPS"); |
126 | X(R_RECNO, "RECNO"); |
127 | (void)fprintf(stderr, ")"); |
128 | } |
129 | } |
130 | |
131 | /* |
132 | * BT_DNPAGE -- Dump the page |
133 | * |
134 | * Parameters: |
135 | * n: page number to dump. |
136 | */ |
137 | void |
138 | __bt_dnpage(dbp, pgno) |
139 | DB *dbp; |
140 | pgno_t pgno; |
141 | { |
142 | BTREE *t; |
143 | PAGE *h; |
144 | |
145 | t = dbp->internal; |
146 | if ((h = mpool_get(t->bt_mp, pgno, 0)) != NULL) { |
147 | __bt_dpage(h); |
148 | (void)mpool_put(t->bt_mp, h, 0); |
149 | } |
150 | } |
151 | |
152 | /* |
153 | * BT_DPAGE -- Dump the page |
154 | * |
155 | * Parameters: |
156 | * h: pointer to the PAGE |
157 | */ |
158 | void |
159 | __bt_dpage(h) |
160 | PAGE *h; |
161 | { |
162 | BINTERNAL *bi; |
163 | BLEAF *bl; |
164 | RINTERNAL *ri; |
165 | RLEAF *rl; |
166 | indx_t cur, top; |
167 | char *sep; |
168 | |
169 | (void)fprintf(stderr, " page %d: (", h->pgno); |
170 | #undef X |
171 | #define X(flag, name) \ |
172 | if (h->flags & flag) { \ |
173 | (void)fprintf(stderr, "%s%s", sep, name); \ |
174 | sep = ", "; \ |
175 | } |
176 | sep = ""; |
177 | X(P_BINTERNAL, "BINTERNAL") /* types */ |
178 | X(P_BLEAF, "BLEAF") |
179 | X(P_RINTERNAL, "RINTERNAL") /* types */ |
180 | X(P_RLEAF, "RLEAF") |
181 | X(P_OVERFLOW, "OVERFLOW") |
182 | X(P_PRESERVE, "PRESERVE"); |
183 | (void)fprintf(stderr, ")\n"); |
184 | #undef X |
185 | |
186 | (void)fprintf(stderr, "\tprev %2d next %2d", h->prevpg, h->nextpg); |
187 | if (h->flags & P_OVERFLOW) |
188 | return; |
189 | |
190 | top = NEXTINDEX(h); |
191 | (void)fprintf(stderr, " lower %3d upper %3d nextind %d\n", |
192 | h->lower, h->upper, top); |
193 | for (cur = 0; cur < top; cur++) { |
194 | (void)fprintf(stderr, "\t[%03d] %4d ", cur, h->linp[cur]); |
195 | switch(h->flags & P_TYPE) { |
196 | case P_BINTERNAL: |
197 | bi = GETBINTERNAL(h, cur); |
198 | (void)fprintf(stderr, |
199 | "size %03d pgno %03d", bi->ksize, bi->pgno); |
200 | if (bi->flags & P_BIGKEY) |
201 | (void)fprintf(stderr, " (indirect)"); |
202 | else if (bi->ksize) |
203 | (void)fprintf(stderr, |
204 | " {%.*s}", (int)bi->ksize, bi->bytes); |
205 | break; |
206 | case P_RINTERNAL: |
207 | ri = GETRINTERNAL(h, cur); |
208 | (void)fprintf(stderr, "entries %03d pgno %03d", |
209 | ri->nrecs, ri->pgno); |
210 | break; |
211 | case P_BLEAF: |
212 | bl = GETBLEAF(h, cur); |
213 | if (bl->flags & P_BIGKEY) |
214 | (void)fprintf(stderr, |
215 | "big key page %lu size %u/", |
216 | *(pgno_t *)bl->bytes, |
217 | *(size_t *)(bl->bytes + sizeof(pgno_t))); |
218 | else if (bl->ksize) |
219 | (void)fprintf(stderr, "%s/", bl->bytes); |
220 | if (bl->flags & P_BIGDATA) |
221 | (void)fprintf(stderr, |
222 | "big data page %lu size %u", |
223 | *(pgno_t *)(bl->bytes + bl->ksize), |
224 | *(size_t *)(bl->bytes + bl->ksize + |
225 | sizeof(pgno_t))); |
226 | else if (bl->dsize) |
227 | (void)fprintf(stderr, "%.*s", |
228 | (int)bl->dsize, bl->bytes + bl->ksize); |
229 | break; |
230 | case P_RLEAF: |
231 | rl = GETRLEAF(h, cur); |
232 | if (rl->flags & P_BIGDATA) |
233 | (void)fprintf(stderr, |
234 | "big data page %lu size %u", |
235 | *(pgno_t *)rl->bytes, |
236 | *(size_t *)(rl->bytes + sizeof(pgno_t))); |
237 | else if (rl->dsize) |
238 | (void)fprintf(stderr, |
239 | "%.*s", (int)rl->dsize, rl->bytes); |
240 | break; |
241 | } |
242 | (void)fprintf(stderr, "\n"); |
243 | } |
244 | } |
245 | #endif |
246 | |
247 | #ifdef STATISTICS |
248 | /* |
249 | * BT_STAT -- Gather/print the tree statistics |
250 | * |
251 | * Parameters: |
252 | * dbp: pointer to the DB |
253 | */ |
254 | void |
255 | __bt_stat(dbp) |
256 | DB *dbp; |
257 | { |
258 | extern u_long bt_cache_hit, bt_cache_miss; |
259 | extern u_long bt_rootsplit, bt_split, bt_sortsplit; |
260 | extern u_long bt_pfxsaved; |
261 | BTREE *t; |
262 | PAGE *h; |
263 | pgno_t i, pcont, pinternal, pleaf; |
264 | u_long ifree, lfree, nkeys; |
265 | int levels; |
266 | |
267 | t = dbp->internal; |
268 | pcont = pinternal = pleaf = 0; |
269 | nkeys = ifree = lfree = 0; |
270 | for (i = P_ROOT; (h = mpool_get(t->bt_mp, i, 0)) != NULL; ++i) { |
271 | switch(h->flags & P_TYPE) { |
272 | case P_BINTERNAL: |
273 | case P_RINTERNAL: |
274 | ++pinternal; |
275 | ifree += h->upper - h->lower; |
276 | break; |
277 | case P_BLEAF: |
278 | case P_RLEAF: |
279 | ++pleaf; |
280 | lfree += h->upper - h->lower; |
281 | nkeys += NEXTINDEX(h); |
282 | break; |
283 | case P_OVERFLOW: |
284 | ++pcont; |
285 | break; |
286 | } |
287 | (void)mpool_put(t->bt_mp, h, 0); |
288 | } |
289 | |
290 | /* Count the levels of the tree. */ |
291 | for (i = P_ROOT, levels = 0 ;; ++levels) { |
292 | h = mpool_get(t->bt_mp, i, 0); |
293 | if (h->flags & (P_BLEAF|P_RLEAF)) { |
294 | if (levels == 0) |
295 | levels = 1; |
296 | (void)mpool_put(t->bt_mp, h, 0); |
297 | break; |
298 | } |
299 | i = ISSET(t, R_RECNO) ? |
300 | GETRINTERNAL(h, 0)->pgno : |
301 | GETBINTERNAL(h, 0)->pgno; |
302 | (void)mpool_put(t->bt_mp, h, 0); |
303 | } |
304 | |
305 | (void)fprintf(stderr, "%d level%s with %ld keys", |
306 | levels, levels == 1 ? "" : "s", nkeys); |
307 | if (ISSET(t, R_RECNO)) |
308 | (void)fprintf(stderr, " (%ld header count)", t->bt_nrecs); |
309 | (void)fprintf(stderr, |
310 | "\n%lu pages (leaf %ld, internal %ld, overflow %ld)\n", |
311 | pinternal + pleaf + pcont, pleaf, pinternal, pcont); |
312 | (void)fprintf(stderr, "%ld cache hits, %ld cache misses\n", |
313 | bt_cache_hit, bt_cache_miss); |
314 | (void)fprintf(stderr, "%ld splits (%ld root splits, %ld sort splits)\n", |
315 | bt_split, bt_rootsplit, bt_sortsplit); |
316 | pleaf *= t->bt_psize - BTDATAOFF; |
317 | if (pleaf) |
318 | (void)fprintf(stderr, |
319 | "%.0f%% leaf fill (%ld bytes used, %ld bytes free)\n", |
320 | ((double)(pleaf - lfree) / pleaf) * 100, |
321 | pleaf - lfree, lfree); |
322 | pinternal *= t->bt_psize - BTDATAOFF; |
323 | if (pinternal) |
324 | (void)fprintf(stderr, |
325 | "%.0f%% internal fill (%ld bytes used, %ld bytes free\n", |
326 | ((double)(pinternal - ifree) / pinternal) * 100, |
327 | pinternal - ifree, ifree); |
328 | if (bt_pfxsaved) |
329 | (void)fprintf(stderr, "prefix checking removed %lu bytes.\n", |
330 | bt_pfxsaved); |
331 | } |
332 | #endif |