mp_stat.c
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上传日期:2022-05-23
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文件大小:13k
- /*-
- * See the file LICENSE for redistribution information.
- *
- * Copyright (c) 1996-2002
- * Sleepycat Software. All rights reserved.
- */
- #include "db_config.h"
- #ifndef lint
- static const char revid[] = "$Id: mp_stat.c,v 11.51 2002/08/06 06:13:47 bostic Exp $";
- #endif /* not lint */
- #ifndef NO_SYSTEM_INCLUDES
- #include <sys/types.h>
- #include <stdio.h>
- #include <string.h>
- #include <unistd.h>
- #endif
- #include "db_int.h"
- #include "dbinc/db_page.h"
- #include "dbinc/db_shash.h"
- #include "dbinc/db_am.h"
- #include "dbinc/mp.h"
- static void __memp_dumpcache __P((DB_ENV *,
- DB_MPOOL *, REGINFO *, size_t *, FILE *, u_int32_t));
- static void __memp_pbh __P((DB_MPOOL *, BH *, size_t *, FILE *));
- static void __memp_stat_wait __P((REGINFO *, MPOOL *, DB_MPOOL_STAT *, int));
- /*
- * __memp_stat --
- * Display MPOOL statistics.
- *
- * PUBLIC: int __memp_stat
- * PUBLIC: __P((DB_ENV *, DB_MPOOL_STAT **, DB_MPOOL_FSTAT ***, u_int32_t));
- */
- int
- __memp_stat(dbenv, gspp, fspp, flags)
- DB_ENV *dbenv;
- DB_MPOOL_STAT **gspp;
- DB_MPOOL_FSTAT ***fspp;
- u_int32_t flags;
- {
- DB_MPOOL *dbmp;
- DB_MPOOL_FSTAT **tfsp, *tstruct;
- DB_MPOOL_STAT *sp;
- MPOOL *c_mp, *mp;
- MPOOLFILE *mfp;
- size_t len, nlen, pagesize;
- u_int32_t pages, i;
- int ret;
- char *name, *tname;
- PANIC_CHECK(dbenv);
- ENV_REQUIRES_CONFIG(dbenv,
- dbenv->mp_handle, "memp_stat", DB_INIT_MPOOL);
- if ((ret = __db_fchk(dbenv,
- "DB_ENV->memp_stat", flags, DB_STAT_CLEAR)) != 0)
- return (ret);
- dbmp = dbenv->mp_handle;
- mp = dbmp->reginfo[0].primary;
- /* Global statistics. */
- if (gspp != NULL) {
- *gspp = NULL;
- if ((ret = __os_umalloc(dbenv, sizeof(**gspp), gspp)) != 0)
- return (ret);
- memset(*gspp, 0, sizeof(**gspp));
- sp = *gspp;
- /*
- * Initialization and information that is not maintained on
- * a per-cache basis.
- */
- c_mp = dbmp->reginfo[0].primary;
- sp->st_gbytes = c_mp->stat.st_gbytes;
- sp->st_bytes = c_mp->stat.st_bytes;
- sp->st_ncache = dbmp->nreg;
- sp->st_regsize = dbmp->reginfo[0].rp->size;
- /* Walk the cache list and accumulate the global information. */
- for (i = 0; i < mp->nreg; ++i) {
- c_mp = dbmp->reginfo[i].primary;
- sp->st_map += c_mp->stat.st_map;
- sp->st_cache_hit += c_mp->stat.st_cache_hit;
- sp->st_cache_miss += c_mp->stat.st_cache_miss;
- sp->st_page_create += c_mp->stat.st_page_create;
- sp->st_page_in += c_mp->stat.st_page_in;
- sp->st_page_out += c_mp->stat.st_page_out;
- sp->st_ro_evict += c_mp->stat.st_ro_evict;
- sp->st_rw_evict += c_mp->stat.st_rw_evict;
- sp->st_page_trickle += c_mp->stat.st_page_trickle;
- sp->st_pages += c_mp->stat.st_pages;
- /*
- * st_page_dirty calculated by __memp_stat_hash
- * st_page_clean calculated here
- */
- __memp_stat_hash(
- &dbmp->reginfo[i], c_mp, &sp->st_page_dirty);
- sp->st_page_clean = sp->st_pages - sp->st_page_dirty;
- sp->st_hash_buckets += c_mp->stat.st_hash_buckets;
- sp->st_hash_searches += c_mp->stat.st_hash_searches;
- sp->st_hash_longest += c_mp->stat.st_hash_longest;
- sp->st_hash_examined += c_mp->stat.st_hash_examined;
- /*
- * st_hash_nowait calculated by __memp_stat_wait
- * st_hash_wait
- */
- __memp_stat_wait(&dbmp->reginfo[i], c_mp, sp, flags);
- sp->st_region_nowait +=
- dbmp->reginfo[i].rp->mutex.mutex_set_nowait;
- sp->st_region_wait +=
- dbmp->reginfo[i].rp->mutex.mutex_set_wait;
- sp->st_alloc += c_mp->stat.st_alloc;
- sp->st_alloc_buckets += c_mp->stat.st_alloc_buckets;
- if (sp->st_alloc_max_buckets <
- c_mp->stat.st_alloc_max_buckets)
- sp->st_alloc_max_buckets =
- c_mp->stat.st_alloc_max_buckets;
- sp->st_alloc_pages += c_mp->stat.st_alloc_pages;
- if (sp->st_alloc_max_pages <
- c_mp->stat.st_alloc_max_pages)
- sp->st_alloc_max_pages =
- c_mp->stat.st_alloc_max_pages;
- if (LF_ISSET(DB_STAT_CLEAR)) {
- dbmp->reginfo[i].rp->mutex.mutex_set_wait = 0;
- dbmp->reginfo[i].rp->mutex.mutex_set_nowait = 0;
- pages = c_mp->stat.st_pages;
- memset(&c_mp->stat, 0, sizeof(c_mp->stat));
- c_mp->stat.st_hash_buckets = c_mp->htab_buckets;
- c_mp->stat.st_pages = pages;
- }
- }
- /*
- * We have duplicate statistics fields in per-file structures
- * and the cache. The counters are only incremented in the
- * per-file structures, except if a file is flushed from the
- * mpool, at which time we copy its information into the cache
- * statistics. We added the cache information above, now we
- * add the per-file information.
- */
- R_LOCK(dbenv, dbmp->reginfo);
- for (mfp = SH_TAILQ_FIRST(&mp->mpfq, __mpoolfile);
- mfp != NULL; mfp = SH_TAILQ_NEXT(mfp, q, __mpoolfile)) {
- sp->st_map += mfp->stat.st_map;
- sp->st_cache_hit += mfp->stat.st_cache_hit;
- sp->st_cache_miss += mfp->stat.st_cache_miss;
- sp->st_page_create += mfp->stat.st_page_create;
- sp->st_page_in += mfp->stat.st_page_in;
- sp->st_page_out += mfp->stat.st_page_out;
- if (fspp == NULL && LF_ISSET(DB_STAT_CLEAR)) {
- pagesize = mfp->stat.st_pagesize;
- memset(&mfp->stat, 0, sizeof(mfp->stat));
- mfp->stat.st_pagesize = pagesize;
- }
- }
- R_UNLOCK(dbenv, dbmp->reginfo);
- }
- /* Per-file statistics. */
- if (fspp != NULL) {
- *fspp = NULL;
- /* Count the MPOOLFILE structures. */
- R_LOCK(dbenv, dbmp->reginfo);
- for (i = 0, len = 0,
- mfp = SH_TAILQ_FIRST(&mp->mpfq, __mpoolfile);
- mfp != NULL;
- ++i, mfp = SH_TAILQ_NEXT(mfp, q, __mpoolfile))
- len += sizeof(DB_MPOOL_FSTAT *) +
- sizeof(DB_MPOOL_FSTAT) +
- strlen(__memp_fns(dbmp, mfp)) + 1;
- len += sizeof(DB_MPOOL_FSTAT *); /* Trailing NULL */
- R_UNLOCK(dbenv, dbmp->reginfo);
- if (i == 0)
- return (0);
- /* Allocate space */
- if ((ret = __os_umalloc(dbenv, len, fspp)) != 0)
- return (ret);
- /*
- * Build each individual entry. We assume that an array of
- * pointers are aligned correctly to be followed by an array
- * of structures, which should be safe (in this particular
- * case, the first element of the structure is a pointer, so
- * we're doubly safe). The array is followed by space for
- * the text file names.
- *
- * Add 1 to i because we need to skip over the NULL.
- */
- tfsp = *fspp;
- tstruct = (DB_MPOOL_FSTAT *)(tfsp + i + 1);
- tname = (char *)(tstruct + i);
- /*
- * Files may have been opened since we counted, don't walk
- * off the end of the allocated space.
- */
- R_LOCK(dbenv, dbmp->reginfo);
- for (mfp = SH_TAILQ_FIRST(&mp->mpfq, __mpoolfile);
- mfp != NULL && i-- > 0;
- ++tfsp, ++tstruct, tname += nlen,
- mfp = SH_TAILQ_NEXT(mfp, q, __mpoolfile)) {
- name = __memp_fns(dbmp, mfp);
- nlen = strlen(name) + 1;
- *tfsp = tstruct;
- *tstruct = mfp->stat;
- if (LF_ISSET(DB_STAT_CLEAR)) {
- pagesize = mfp->stat.st_pagesize;
- memset(&mfp->stat, 0, sizeof(mfp->stat));
- mfp->stat.st_pagesize = pagesize;
- }
- tstruct->file_name = tname;
- memcpy(tname, name, nlen);
- }
- R_UNLOCK(dbenv, dbmp->reginfo);
- *tfsp = NULL;
- }
- return (0);
- }
- #define FMAP_ENTRIES 200 /* Files we map. */
- #define MPOOL_DUMP_HASH 0x01 /* Debug hash chains. */
- #define MPOOL_DUMP_MEM 0x04 /* Debug region memory. */
- #define MPOOL_DUMP_ALL 0x07 /* Debug all. */
- /*
- * __memp_dump_region --
- * Display MPOOL structures.
- *
- * PUBLIC: int __memp_dump_region __P((DB_ENV *, char *, FILE *));
- */
- int
- __memp_dump_region(dbenv, area, fp)
- DB_ENV *dbenv;
- char *area;
- FILE *fp;
- {
- static const FN fn[] = {
- { MP_CAN_MMAP, "mmapped" },
- { MP_DEADFILE, "dead" },
- { MP_DIRECT, "no buffer" },
- { MP_EXTENT, "extent" },
- { MP_TEMP, "temporary" },
- { MP_UNLINK, "unlink" },
- { 0, NULL }
- };
- DB_MPOOL *dbmp;
- DB_MPOOLFILE *dbmfp;
- MPOOL *mp;
- MPOOLFILE *mfp;
- size_t fmap[FMAP_ENTRIES + 1];
- u_int32_t i, flags;
- int cnt;
- u_int8_t *p;
- PANIC_CHECK(dbenv);
- ENV_REQUIRES_CONFIG(dbenv,
- dbenv->mp_handle, "memp_dump_region", DB_INIT_MPOOL);
- dbmp = dbenv->mp_handle;
- /* Make it easy to call from the debugger. */
- if (fp == NULL)
- fp = stderr;
- for (flags = 0; *area != ' '; ++area)
- switch (*area) {
- case 'A':
- LF_SET(MPOOL_DUMP_ALL);
- break;
- case 'h':
- LF_SET(MPOOL_DUMP_HASH);
- break;
- case 'm':
- LF_SET(MPOOL_DUMP_MEM);
- break;
- }
- mp = dbmp->reginfo[0].primary;
- /* Display MPOOL structures. */
- (void)fprintf(fp, "%snPool (region addr 0x%lx)n",
- DB_LINE, P_TO_ULONG(dbmp->reginfo[0].addr));
- /* Display the MPOOLFILE structures. */
- R_LOCK(dbenv, dbmp->reginfo);
- for (cnt = 0, mfp = SH_TAILQ_FIRST(&mp->mpfq, __mpoolfile);
- mfp != NULL; mfp = SH_TAILQ_NEXT(mfp, q, __mpoolfile), ++cnt) {
- (void)fprintf(fp, "File #%d: %s: pagesize %lun", cnt + 1,
- __memp_fns(dbmp, mfp), (u_long)mfp->stat.st_pagesize);
- (void)fprintf(fp, "t type %ld; ref %lu; blocks %lu; last %lu;",
- (long)mfp->ftype, (u_long)mfp->mpf_cnt,
- (u_long)mfp->block_cnt, (u_long)mfp->last_pgno);
- __db_prflags(mfp->flags, fn, fp);
- (void)fprintf(fp, "nt UID: ");
- p = R_ADDR(dbmp->reginfo, mfp->fileid_off);
- for (i = 0; i < DB_FILE_ID_LEN; ++i, ++p) {
- (void)fprintf(fp, "%x", (u_int)*p);
- if (i < DB_FILE_ID_LEN - 1)
- (void)fprintf(fp, " ");
- }
- (void)fprintf(fp, "n");
- if (cnt < FMAP_ENTRIES)
- fmap[cnt] = R_OFFSET(dbmp->reginfo, mfp);
- }
- R_UNLOCK(dbenv, dbmp->reginfo);
- MUTEX_THREAD_LOCK(dbenv, dbmp->mutexp);
- for (dbmfp = TAILQ_FIRST(&dbmp->dbmfq);
- dbmfp != NULL; dbmfp = TAILQ_NEXT(dbmfp, q), ++cnt) {
- (void)fprintf(fp, "File #%d: %s: per-process, %sn",
- cnt + 1, __memp_fn(dbmfp),
- F_ISSET(dbmfp, MP_READONLY) ? "readonly" : "read/write");
- if (cnt < FMAP_ENTRIES)
- fmap[cnt] = R_OFFSET(dbmp->reginfo, mfp);
- }
- MUTEX_THREAD_UNLOCK(dbenv, dbmp->mutexp);
- if (cnt < FMAP_ENTRIES)
- fmap[cnt] = INVALID_ROFF;
- else
- fmap[FMAP_ENTRIES] = INVALID_ROFF;
- /* Dump the memory pools. */
- for (i = 0; i < mp->nreg; ++i) {
- (void)fprintf(fp, "%snCache #%d:n", DB_LINE, i + 1);
- __memp_dumpcache(
- dbenv, dbmp, &dbmp->reginfo[i], fmap, fp, flags);
- }
- /* Flush in case we're debugging. */
- (void)fflush(fp);
- return (0);
- }
- /*
- * __memp_dumpcache --
- * Display statistics for a cache.
- */
- static void
- __memp_dumpcache(dbenv, dbmp, reginfo, fmap, fp, flags)
- DB_ENV *dbenv;
- DB_MPOOL *dbmp;
- REGINFO *reginfo;
- size_t *fmap;
- FILE *fp;
- u_int32_t flags;
- {
- BH *bhp;
- DB_MPOOL_HASH *hp;
- MPOOL *c_mp;
- int bucket;
- c_mp = reginfo->primary;
- /* Display the hash table list of BH's. */
- if (LF_ISSET(MPOOL_DUMP_HASH)) {
- (void)fprintf(fp,
- "%snBH hash table (%lu hash slots)nbucket (priority):n",
- DB_LINE, (u_long)c_mp->htab_buckets);
- (void)fprintf(fp,
- "tpageno, file, ref, address [LSN] priorityn");
- for (hp = R_ADDR(reginfo, c_mp->htab),
- bucket = 0; bucket < c_mp->htab_buckets; ++hp, ++bucket) {
- MUTEX_LOCK(dbenv, &hp->hash_mutex);
- if ((bhp =
- SH_TAILQ_FIRST(&hp->hash_bucket, __bh)) != NULL)
- (void)fprintf(fp, "%lu (%u):n",
- (u_long)bucket, hp->hash_priority);
- for (; bhp != NULL; bhp = SH_TAILQ_NEXT(bhp, hq, __bh))
- __memp_pbh(dbmp, bhp, fmap, fp);
- MUTEX_UNLOCK(dbenv, &hp->hash_mutex);
- }
- }
- /* Dump the memory pool. */
- if (LF_ISSET(MPOOL_DUMP_MEM))
- __db_shalloc_dump(reginfo->addr, fp);
- }
- /*
- * __memp_pbh --
- * Display a BH structure.
- */
- static void
- __memp_pbh(dbmp, bhp, fmap, fp)
- DB_MPOOL *dbmp;
- BH *bhp;
- size_t *fmap;
- FILE *fp;
- {
- static const FN fn[] = {
- { BH_CALLPGIN, "callpgin" },
- { BH_DIRTY, "dirty" },
- { BH_DIRTY_CREATE, "created" },
- { BH_DISCARD, "discard" },
- { BH_LOCKED, "locked" },
- { BH_TRASH, "trash" },
- { 0, NULL }
- };
- int i;
- for (i = 0; i < FMAP_ENTRIES; ++i)
- if (fmap[i] == INVALID_ROFF || fmap[i] == bhp->mf_offset)
- break;
- if (fmap[i] == INVALID_ROFF)
- (void)fprintf(fp, "t%5lu, %lu, %2lu, %8lu [%lu,%lu] %lu",
- (u_long)bhp->pgno, (u_long)bhp->mf_offset,
- (u_long)bhp->ref, (u_long)R_OFFSET(dbmp->reginfo, bhp),
- (u_long)LSN(bhp->buf).file, (u_long)LSN(bhp->buf).offset,
- (u_long)bhp->priority);
- else
- (void)fprintf(fp, "t%5lu, #%d, %2lu, %8lu [%lu,%lu] %lu",
- (u_long)bhp->pgno, i + 1,
- (u_long)bhp->ref, (u_long)R_OFFSET(dbmp->reginfo, bhp),
- (u_long)LSN(bhp->buf).file, (u_long)LSN(bhp->buf).offset,
- (u_long)bhp->priority);
- __db_prflags(bhp->flags, fn, fp);
- (void)fprintf(fp, "n");
- }
- /*
- * __memp_stat_hash --
- * Total hash bucket stats (other than mutex wait) into the region.
- *
- * PUBLIC: void __memp_stat_hash __P((REGINFO *, MPOOL *, u_int32_t *));
- */
- void
- __memp_stat_hash(reginfo, mp, dirtyp)
- REGINFO *reginfo;
- MPOOL *mp;
- u_int32_t *dirtyp;
- {
- DB_MPOOL_HASH *hp;
- u_int32_t dirty;
- int i;
- hp = R_ADDR(reginfo, mp->htab);
- for (i = 0, dirty = 0; i < mp->htab_buckets; i++, hp++)
- dirty += hp->hash_page_dirty;
- *dirtyp = dirty;
- }
- /*
- * __memp_stat_wait --
- * Total hash bucket wait stats into the region.
- */
- static void
- __memp_stat_wait(reginfo, mp, mstat, flags)
- REGINFO *reginfo;
- MPOOL *mp;
- DB_MPOOL_STAT *mstat;
- int flags;
- {
- DB_MPOOL_HASH *hp;
- DB_MUTEX *mutexp;
- int i;
- mstat->st_hash_max_wait = 0;
- hp = R_ADDR(reginfo, mp->htab);
- for (i = 0; i < mp->htab_buckets; i++, hp++) {
- mutexp = &hp->hash_mutex;
- mstat->st_hash_nowait += mutexp->mutex_set_nowait;
- mstat->st_hash_wait += mutexp->mutex_set_wait;
- if (mutexp->mutex_set_wait > mstat->st_hash_max_wait)
- mstat->st_hash_max_wait = mutexp->mutex_set_wait;
- if (LF_ISSET(DB_STAT_CLEAR)) {
- mutexp->mutex_set_wait = 0;
- mutexp->mutex_set_nowait = 0;
- }
- }
- }