330 lines
8.5 KiB
C
330 lines
8.5 KiB
C
/*-
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* Copyright (c) 1990, 1993, 1994
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Mike Olson.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#if defined(LIBC_SCCS) && !defined(lint)
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static char sccsid[] = "@(#)bt_debug.c 8.5 (Berkeley) 8/17/94";
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#endif /* LIBC_SCCS and not lint */
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#include <sys/param.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <db.h>
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#include "btree.h"
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#ifdef DEBUG
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/*
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* BT_DUMP -- Dump the tree
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*
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* Parameters:
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* dbp: pointer to the DB
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*/
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void
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__bt_dump(dbp)
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DB *dbp;
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{
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BTREE *t;
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PAGE *h;
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pgno_t i;
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char *sep;
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t = dbp->internal;
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(void)fprintf(stderr, "%s: pgsz %d",
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F_ISSET(t, B_INMEM) ? "memory" : "disk", t->bt_psize);
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if (F_ISSET(t, R_RECNO))
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(void)fprintf(stderr, " keys %lu", t->bt_nrecs);
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#undef X
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#define X(flag, name) \
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if (F_ISSET(t, flag)) { \
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(void)fprintf(stderr, "%s%s", sep, name); \
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sep = ", "; \
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}
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if (t->flags != 0) {
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sep = " flags (";
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X(R_FIXLEN, "FIXLEN");
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X(B_INMEM, "INMEM");
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X(B_NODUPS, "NODUPS");
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X(B_RDONLY, "RDONLY");
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X(R_RECNO, "RECNO");
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X(B_METADIRTY,"METADIRTY");
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(void)fprintf(stderr, ")\n");
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}
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#undef X
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for (i = P_ROOT; (h = mpool_get(t->bt_mp, i, 0)) != NULL; ++i) {
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__bt_dpage(h);
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(void)mpool_put(t->bt_mp, h, 0);
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}
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}
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/*
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* BT_DMPAGE -- Dump the meta page
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*
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* Parameters:
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* h: pointer to the PAGE
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*/
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void
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__bt_dmpage(h)
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PAGE *h;
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{
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BTMETA *m;
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char *sep;
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m = (BTMETA *)h;
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(void)fprintf(stderr, "magic %lx\n", m->magic);
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(void)fprintf(stderr, "version %lu\n", m->version);
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(void)fprintf(stderr, "psize %lu\n", m->psize);
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(void)fprintf(stderr, "free %lu\n", m->free);
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(void)fprintf(stderr, "nrecs %lu\n", m->nrecs);
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(void)fprintf(stderr, "flags %lu", m->flags);
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#undef X
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#define X(flag, name) \
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if (m->flags & flag) { \
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(void)fprintf(stderr, "%s%s", sep, name); \
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sep = ", "; \
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}
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if (m->flags) {
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sep = " (";
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X(B_NODUPS, "NODUPS");
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X(R_RECNO, "RECNO");
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(void)fprintf(stderr, ")");
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}
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}
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/*
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* BT_DNPAGE -- Dump the page
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*
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* Parameters:
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* n: page number to dump.
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*/
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void
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__bt_dnpage(dbp, pgno)
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DB *dbp;
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pgno_t pgno;
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{
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BTREE *t;
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PAGE *h;
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t = dbp->internal;
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if ((h = mpool_get(t->bt_mp, pgno, 0)) != NULL) {
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__bt_dpage(h);
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(void)mpool_put(t->bt_mp, h, 0);
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}
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}
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/*
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* BT_DPAGE -- Dump the page
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*
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* Parameters:
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* h: pointer to the PAGE
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*/
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void
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__bt_dpage(h)
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PAGE *h;
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{
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BINTERNAL *bi;
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BLEAF *bl;
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RINTERNAL *ri;
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RLEAF *rl;
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indx_t cur, top;
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char *sep;
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(void)fprintf(stderr, " page %d: (", h->pgno);
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#undef X
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#define X(flag, name) \
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if (h->flags & flag) { \
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(void)fprintf(stderr, "%s%s", sep, name); \
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sep = ", "; \
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}
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sep = "";
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X(P_BINTERNAL, "BINTERNAL") /* types */
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X(P_BLEAF, "BLEAF")
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X(P_RINTERNAL, "RINTERNAL") /* types */
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X(P_RLEAF, "RLEAF")
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X(P_OVERFLOW, "OVERFLOW")
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X(P_PRESERVE, "PRESERVE");
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(void)fprintf(stderr, ")\n");
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#undef X
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(void)fprintf(stderr, "\tprev %2d next %2d", h->prevpg, h->nextpg);
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if (h->flags & P_OVERFLOW)
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return;
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top = NEXTINDEX(h);
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(void)fprintf(stderr, " lower %3d upper %3d nextind %d\n",
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h->lower, h->upper, top);
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for (cur = 0; cur < top; cur++) {
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(void)fprintf(stderr, "\t[%03d] %4d ", cur, h->linp[cur]);
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switch (h->flags & P_TYPE) {
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case P_BINTERNAL:
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bi = GETBINTERNAL(h, cur);
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(void)fprintf(stderr,
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"size %03d pgno %03d", bi->ksize, bi->pgno);
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if (bi->flags & P_BIGKEY)
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(void)fprintf(stderr, " (indirect)");
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else if (bi->ksize)
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(void)fprintf(stderr,
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" {%.*s}", (int)bi->ksize, bi->bytes);
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break;
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case P_RINTERNAL:
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ri = GETRINTERNAL(h, cur);
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(void)fprintf(stderr, "entries %03d pgno %03d",
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ri->nrecs, ri->pgno);
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break;
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case P_BLEAF:
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bl = GETBLEAF(h, cur);
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if (bl->flags & P_BIGKEY)
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(void)fprintf(stderr,
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"big key page %lu size %u/",
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*(pgno_t *)bl->bytes,
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*(u_int32_t *)(bl->bytes + sizeof(pgno_t)));
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else if (bl->ksize)
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(void)fprintf(stderr, "%s/", bl->bytes);
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if (bl->flags & P_BIGDATA)
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(void)fprintf(stderr,
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"big data page %lu size %u",
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*(pgno_t *)(bl->bytes + bl->ksize),
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*(u_int32_t *)(bl->bytes + bl->ksize +
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sizeof(pgno_t)));
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else if (bl->dsize)
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(void)fprintf(stderr, "%.*s",
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(int)bl->dsize, bl->bytes + bl->ksize);
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break;
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case P_RLEAF:
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rl = GETRLEAF(h, cur);
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if (rl->flags & P_BIGDATA)
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(void)fprintf(stderr,
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"big data page %lu size %u",
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*(pgno_t *)rl->bytes,
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*(u_int32_t *)(rl->bytes + sizeof(pgno_t)));
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else if (rl->dsize)
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(void)fprintf(stderr,
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"%.*s", (int)rl->dsize, rl->bytes);
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break;
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}
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(void)fprintf(stderr, "\n");
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}
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}
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#endif
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#ifdef STATISTICS
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/*
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* BT_STAT -- Gather/print the tree statistics
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*
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* Parameters:
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* dbp: pointer to the DB
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*/
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void
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__bt_stat(dbp)
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DB *dbp;
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{
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extern u_long bt_cache_hit, bt_cache_miss, bt_pfxsaved, bt_rootsplit;
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extern u_long bt_sortsplit, bt_split;
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BTREE *t;
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PAGE *h;
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pgno_t i, pcont, pinternal, pleaf;
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u_long ifree, lfree, nkeys;
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int levels;
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t = dbp->internal;
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pcont = pinternal = pleaf = 0;
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nkeys = ifree = lfree = 0;
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for (i = P_ROOT; (h = mpool_get(t->bt_mp, i, 0)) != NULL; ++i) {
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switch (h->flags & P_TYPE) {
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case P_BINTERNAL:
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case P_RINTERNAL:
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++pinternal;
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ifree += h->upper - h->lower;
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break;
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case P_BLEAF:
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case P_RLEAF:
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++pleaf;
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lfree += h->upper - h->lower;
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nkeys += NEXTINDEX(h);
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break;
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case P_OVERFLOW:
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++pcont;
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break;
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}
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(void)mpool_put(t->bt_mp, h, 0);
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}
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/* Count the levels of the tree. */
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for (i = P_ROOT, levels = 0 ;; ++levels) {
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h = mpool_get(t->bt_mp, i, 0);
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if (h->flags & (P_BLEAF|P_RLEAF)) {
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if (levels == 0)
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levels = 1;
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(void)mpool_put(t->bt_mp, h, 0);
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break;
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}
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i = F_ISSET(t, R_RECNO) ?
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GETRINTERNAL(h, 0)->pgno :
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GETBINTERNAL(h, 0)->pgno;
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(void)mpool_put(t->bt_mp, h, 0);
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}
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(void)fprintf(stderr, "%d level%s with %ld keys",
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levels, levels == 1 ? "" : "s", nkeys);
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if (F_ISSET(t, R_RECNO))
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(void)fprintf(stderr, " (%ld header count)", t->bt_nrecs);
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(void)fprintf(stderr,
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"\n%lu pages (leaf %ld, internal %ld, overflow %ld)\n",
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pinternal + pleaf + pcont, pleaf, pinternal, pcont);
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(void)fprintf(stderr, "%ld cache hits, %ld cache misses\n",
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bt_cache_hit, bt_cache_miss);
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(void)fprintf(stderr, "%ld splits (%ld root splits, %ld sort splits)\n",
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bt_split, bt_rootsplit, bt_sortsplit);
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pleaf *= t->bt_psize - BTDATAOFF;
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if (pleaf)
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(void)fprintf(stderr,
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"%.0f%% leaf fill (%ld bytes used, %ld bytes free)\n",
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((double)(pleaf - lfree) / pleaf) * 100,
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pleaf - lfree, lfree);
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pinternal *= t->bt_psize - BTDATAOFF;
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if (pinternal)
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(void)fprintf(stderr,
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"%.0f%% internal fill (%ld bytes used, %ld bytes free\n",
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((double)(pinternal - ifree) / pinternal) * 100,
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pinternal - ifree, ifree);
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if (bt_pfxsaved)
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(void)fprintf(stderr, "prefix checking removed %lu bytes.\n",
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bt_pfxsaved);
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}
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#endif
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