aboutsummaryrefslogtreecommitdiff
path: root/db2/mp/mp_pr.c
blob: 13a6c62d352d33e8f9ea6c17dad59520c44faeb0 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
/*-
 * See the file LICENSE for redistribution information.
 *
 * Copyright (c) 1996, 1997
 *	Sleepycat Software.  All rights reserved.
 */
#include "config.h"

#ifndef lint
static const char sccsid[] = "@(#)mp_pr.c	10.21 (Sleepycat) 1/6/98";
#endif /* not lint */

#ifndef NO_SYSTEM_INCLUDES
#include <sys/types.h>

#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#endif

#include "db_int.h"
#include "shqueue.h"
#include "db_shash.h"
#include "mp.h"

static void __memp_pbh __P((FILE *, DB_MPOOL *, BH *, int));
static void __memp_pdbmf __P((FILE *, DB_MPOOLFILE *, int));
static void __memp_pmf __P((FILE *, MPOOLFILE *, int));
static void __memp_pmp __P((FILE *, DB_MPOOL *, MPOOL *, int));

/*
 * memp_stat --
 *	Display MPOOL statistics.
 */
int
memp_stat(dbmp, gspp, fspp, db_malloc)
	DB_MPOOL *dbmp;
	DB_MPOOL_STAT **gspp;
	DB_MPOOL_FSTAT ***fspp;
	void *(*db_malloc) __P((size_t));
{
	DB_MPOOL_FSTAT **tfsp;
	MPOOLFILE *mfp;
	size_t len, nlen;
	char *name;

	/* Allocate space for the global statistics. */
	if (gspp != NULL) {
		*gspp = NULL;

		if ((*gspp = db_malloc == NULL ?
		    (DB_MPOOL_STAT *)__db_malloc(sizeof(**gspp)) :
		    (DB_MPOOL_STAT *)db_malloc(sizeof(**gspp))) == NULL)
			return (ENOMEM);

		LOCKREGION(dbmp);

		/* Copy out the global statistics. */
		**gspp = dbmp->mp->stat;
		(*gspp)->st_hash_buckets = dbmp->mp->htab_buckets;
		(*gspp)->st_region_wait =
		    dbmp->mp->rlayout.lock.mutex_set_wait;
		(*gspp)->st_region_nowait =
		    dbmp->mp->rlayout.lock.mutex_set_nowait;

		UNLOCKREGION(dbmp);
	}

	if (fspp != NULL) {
		*fspp = NULL;

		LOCKREGION(dbmp);

		/* Count the MPOOLFILE structures. */
		for (len = 0,
		    mfp = SH_TAILQ_FIRST(&dbmp->mp->mpfq, __mpoolfile);
		    mfp != NULL;
		    ++len, mfp = SH_TAILQ_NEXT(mfp, q, __mpoolfile));

		UNLOCKREGION(dbmp);

		if (len == 0)
			return (0);

		/* Allocate space for the pointers. */
		len = (len + 1) * sizeof(DB_MPOOL_FSTAT *);
		if ((*fspp = db_malloc == NULL ?
		    (DB_MPOOL_FSTAT **)__db_malloc(len) :
		    (DB_MPOOL_FSTAT **)db_malloc(len)) == NULL)
			return (ENOMEM);

		LOCKREGION(dbmp);

		/* Build each individual entry. */
		for (tfsp = *fspp,
		    mfp = SH_TAILQ_FIRST(&dbmp->mp->mpfq, __mpoolfile);
		    mfp != NULL;
		    ++tfsp, mfp = SH_TAILQ_NEXT(mfp, q, __mpoolfile)) {
			name = __memp_fns(dbmp, mfp);
			nlen = strlen(name);
			len = sizeof(DB_MPOOL_FSTAT) + nlen + 1;
			if ((*tfsp = db_malloc == NULL ?
			    (DB_MPOOL_FSTAT *)__db_malloc(len) :
			    (DB_MPOOL_FSTAT *)db_malloc(len)) == NULL)
				return (ENOMEM);
			**tfsp = mfp->stat;
			(*tfsp)->file_name = (char *)
			    (u_int8_t *)*tfsp + sizeof(DB_MPOOL_FSTAT);
			memcpy((*tfsp)->file_name, name, nlen + 1);
		}
		*tfsp = NULL;

		UNLOCKREGION(dbmp);
	}
	return (0);
}

/*
 * __memp_fn --
 *	On errors we print whatever is available as the file name.
 *
 * PUBLIC: char * __memp_fn __P((DB_MPOOLFILE *));
 */
char *
__memp_fn(dbmfp)
	DB_MPOOLFILE *dbmfp;
{
	return (__memp_fns(dbmfp->dbmp, dbmfp->mfp));
}

/*
 * __memp_fns --
 *	On errors we print whatever is available as the file name.
 *
 * PUBLIC: char * __memp_fns __P((DB_MPOOL *, MPOOLFILE *));
 *
 */
char *
__memp_fns(dbmp, mfp)
	DB_MPOOL *dbmp;
	MPOOLFILE *mfp;
{
	if (mfp->path_off == 0)
		return ((char *)"temporary");

	return ((char *)R_ADDR(dbmp, mfp->path_off));
}

/*
 * __memp_debug --
 *	Display MPOOL structures.
 *
 * PUBLIC: void __memp_debug __P((DB_MPOOL *, FILE *, int));
 */
void
__memp_debug(dbmp, fp, data)
	DB_MPOOL *dbmp;
	FILE *fp;
	int data;
{
	DB_MPOOLFILE *dbmfp;
	u_long cnt;

	/* Make it easy to call from the debugger. */
	if (fp == NULL)
		fp = stderr;

	/* Welcome message. */
	(void)fprintf(fp, "%s\nMpool per-process (%lu) statistics\n",
	    DB_LINE, (u_long)getpid());

	if (data)
		(void)fprintf(fp, "    fd: %d; addr %lx; maddr %lx\n",
		    dbmp->fd, (u_long)dbmp->addr, (u_long)dbmp->maddr);

	/* Display the DB_MPOOLFILE structures. */
	for (cnt = 0, dbmfp = TAILQ_FIRST(&dbmp->dbmfq);
	    dbmfp != NULL; ++cnt, dbmfp = TAILQ_NEXT(dbmfp, q));
	(void)fprintf(fp, "%lu process-local files\n", cnt);
	for (dbmfp = TAILQ_FIRST(&dbmp->dbmfq);
	    dbmfp != NULL; dbmfp = TAILQ_NEXT(dbmfp, q)) {
		(void)fprintf(fp, "%s\n", __memp_fn(dbmfp));
		__memp_pdbmf(fp, dbmfp, data);
	}

	/* Switch to global statistics. */
	(void)fprintf(fp, "\n%s\nMpool statistics\n", DB_LINE);

	/* Display the MPOOL structure. */
	__memp_pmp(fp, dbmp, dbmp->mp, data);

	/* Flush in case we're debugging. */
	(void)fflush(fp);
}

/*
 * __memp_pdbmf --
 *	Display a DB_MPOOLFILE structure.
 */
static void
__memp_pdbmf(fp, dbmfp, data)
	FILE *fp;
	DB_MPOOLFILE *dbmfp;
	int data;
{
	if (!data)
		return;

	(void)fprintf(fp, "    fd: %d; %s\n",
	    dbmfp->fd, F_ISSET(dbmfp, MP_READONLY) ? "readonly" : "read/write");
}

/*
 * __memp_pmp --
 *	Display the MPOOL structure.
 */
static void
__memp_pmp(fp, dbmp, mp, data)
	FILE *fp;
	DB_MPOOL *dbmp;
	MPOOL *mp;
	int data;
{
	BH *bhp;
	MPOOLFILE *mfp;
	DB_HASHTAB *htabp;
	size_t bucket;
	int cnt;
	const char *sep;

	(void)fprintf(fp, "references: %lu; cachesize: %lu\n",
	    (u_long)mp->rlayout.refcnt, (u_long)mp->stat.st_cachesize);
	(void)fprintf(fp,
	    "    %lu pages created\n", (u_long)mp->stat.st_page_create);
	(void)fprintf(fp,
	    "    %lu mmap pages returned\n", (u_long)mp->stat.st_map);
	(void)fprintf(fp, "    %lu I/O's (%lu read, %lu written)\n",
	    (u_long)mp->stat.st_page_in + mp->stat.st_page_out,
	    (u_long)mp->stat.st_page_in, (u_long)mp->stat.st_page_out);
	if (mp->stat.st_cache_hit + mp->stat.st_cache_miss != 0)
		(void)fprintf(fp,
		    "    %.0f%% cache hit rate (%lu hit, %lu miss)\n",
		    ((double)mp->stat.st_cache_hit /
	    (mp->stat.st_cache_hit + mp->stat.st_cache_miss)) * 100,
		    (u_long)mp->stat.st_cache_hit,
		    (u_long)mp->stat.st_cache_miss);

	/* Display the MPOOLFILE structures. */
	for (cnt = 0, mfp = SH_TAILQ_FIRST(&dbmp->mp->mpfq, __mpoolfile);
	    mfp != NULL; ++cnt, mfp = SH_TAILQ_NEXT(mfp, q, __mpoolfile));
	(void)fprintf(fp, "%d total files\n", cnt);
	for (cnt = 1, mfp = SH_TAILQ_FIRST(&dbmp->mp->mpfq, __mpoolfile);
	    mfp != NULL; ++cnt, mfp = SH_TAILQ_NEXT(mfp, q, __mpoolfile)) {
		(void)fprintf(fp, "file %d\n", cnt);
		__memp_pmf(fp, mfp, data);
	}

	if (!data)
		return;

	/* Display the hash table list of BH's. */
	(void)fprintf(fp, "%s\nHASH table of BH's (%lu buckets):\n",
	    DB_LINE, (u_long)mp->htab_buckets);
	(void)fprintf(fp,
	    "longest chain searched %lu\n", (u_long)mp->stat.st_hash_longest);
	(void)fprintf(fp, "average chain searched %lu (total/calls: %lu/%lu)\n",
	    (u_long)mp->stat.st_hash_examined /
	    (mp->stat.st_hash_searches ? mp->stat.st_hash_searches : 1),
	    (u_long)mp->stat.st_hash_examined,
	    (u_long)mp->stat.st_hash_searches);
	for (htabp = dbmp->htab,
	    bucket = 0; bucket < mp->htab_buckets; ++htabp, ++bucket) {
		if (SH_TAILQ_FIRST(&dbmp->htab[bucket], __bh) != NULL)
			(void)fprintf(fp, "%lu:\n", (u_long)bucket);
		for (bhp = SH_TAILQ_FIRST(&dbmp->htab[bucket], __bh);
		    bhp != NULL; bhp = SH_TAILQ_NEXT(bhp, hq, __bh))
			__memp_pbh(fp, dbmp, bhp, data);
	}

	/* Display the LRU list of BH's. */
	(void)fprintf(fp, "LRU list of BH's (pgno/offset):");
	for (sep = "\n    ", bhp = SH_TAILQ_FIRST(&dbmp->mp->bhq, __bh);
	    bhp != NULL; sep = ", ", bhp = SH_TAILQ_NEXT(bhp, q, __bh))
		(void)fprintf(fp, "%s%lu/%lu", sep,
		    (u_long)bhp->pgno, (u_long)R_OFFSET(dbmp, bhp));
	(void)fprintf(fp, "\n");
}

/*
 * __memp_pmf --
 *	Display an MPOOLFILE structure.
 */
static void
__memp_pmf(fp, mfp, data)
	FILE *fp;
	MPOOLFILE *mfp;
	int data;
{
	(void)fprintf(fp, "    %lu pages created\n",
	    (u_long)mfp->stat.st_page_create);
	(void)fprintf(fp, "    %lu I/O's (%lu read, %lu written)\n",
	    (u_long)mfp->stat.st_page_in + mfp->stat.st_page_out,
	    (u_long)mfp->stat.st_page_in, (u_long)mfp->stat.st_page_out);
	if (mfp->stat.st_cache_hit + mfp->stat.st_cache_miss != 0)
		(void)fprintf(fp,
		    "    %.0f%% cache hit rate (%lu hit, %lu miss)\n",
		    ((double)mfp->stat.st_cache_hit /
		    (mfp->stat.st_cache_hit + mfp->stat.st_cache_miss)) * 100,
		    (u_long)mfp->stat.st_cache_hit,
		    (u_long)mfp->stat.st_cache_miss);
	if (!data)
		return;

	(void)fprintf(fp, "    %d references; %s; pagesize: %lu\n", mfp->ref,
	    F_ISSET(mfp, MP_CAN_MMAP) ? "mmap" : "read/write",
	    (u_long)mfp->stat.st_pagesize);
}

/*
 * __memp_pbh --
 *	Display a BH structure.
 */
static void
__memp_pbh(fp, dbmp, bhp, data)
	FILE *fp;
	DB_MPOOL *dbmp;
	BH *bhp;
	int data;
{
	const char *sep;

	if (!data)
		return;

	(void)fprintf(fp, "    BH @ %lu (mf: %lu): page %lu; ref %lu",
	    (u_long)R_OFFSET(dbmp, bhp),
	    (u_long)bhp->mf_offset, (u_long)bhp->pgno, (u_long)bhp->ref);
	sep = "; ";
	if (F_ISSET(bhp, BH_DIRTY)) {
		(void)fprintf(fp, "%sdirty", sep);
		sep = ", ";
	}
	if (F_ISSET(bhp, BH_WRITE)) {
		(void)fprintf(fp, "%schk_write", sep);
		sep = ", ";
	}
	(void)fprintf(fp, "\n");
}