diff options
Diffstat (limited to 'module/zfs/spa_stats.c')
| -rw-r--r-- | module/zfs/spa_stats.c | 1034 |
1 files changed, 0 insertions, 1034 deletions
diff --git a/module/zfs/spa_stats.c b/module/zfs/spa_stats.c deleted file mode 100644 index 6895428f4..000000000 --- a/module/zfs/spa_stats.c +++ /dev/null @@ -1,1034 +0,0 @@ -/* - * CDDL HEADER START - * - * The contents of this file are subject to the terms of the - * Common Development and Distribution License (the "License"). - * You may not use this file except in compliance with the License. - * - * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE - * or http://www.opensolaris.org/os/licensing. - * See the License for the specific language governing permissions - * and limitations under the License. - * - * When distributing Covered Code, include this CDDL HEADER in each - * file and include the License file at usr/src/OPENSOLARIS.LICENSE. - * If applicable, add the following below this CDDL HEADER, with the - * fields enclosed by brackets "[]" replaced with your own identifying - * information: Portions Copyright [yyyy] [name of copyright owner] - * - * CDDL HEADER END - */ - -#include <sys/zfs_context.h> -#include <sys/spa_impl.h> -#include <sys/vdev_impl.h> -#include <sys/spa.h> -#include <zfs_comutil.h> - -/* - * Keeps stats on last N reads per spa_t, disabled by default. - */ -int zfs_read_history = 0; - -/* - * Include cache hits in history, disabled by default. - */ -int zfs_read_history_hits = 0; - -/* - * Keeps stats on the last 100 txgs by default. - */ -int zfs_txg_history = 100; - -/* - * Keeps stats on the last N MMP updates, disabled by default. - */ -int zfs_multihost_history = 0; - -/* - * ========================================================================== - * SPA Read History Routines - * ========================================================================== - */ - -/* - * Read statistics - Information exported regarding each arc_read call - */ -typedef struct spa_read_history { - hrtime_t start; /* time read completed */ - uint64_t objset; /* read from this objset */ - uint64_t object; /* read of this object number */ - uint64_t level; /* block's indirection level */ - uint64_t blkid; /* read of this block id */ - char origin[24]; /* read originated from here */ - uint32_t aflags; /* ARC flags (cached, prefetch, etc.) */ - pid_t pid; /* PID of task doing read */ - char comm[16]; /* process name of task doing read */ - procfs_list_node_t srh_node; -} spa_read_history_t; - -static int -spa_read_history_show_header(struct seq_file *f) -{ - seq_printf(f, "%-8s %-16s %-8s %-8s %-8s %-8s %-8s " - "%-24s %-8s %-16s\n", "UID", "start", "objset", "object", - "level", "blkid", "aflags", "origin", "pid", "process"); - - return (0); -} - -static int -spa_read_history_show(struct seq_file *f, void *data) -{ - spa_read_history_t *srh = (spa_read_history_t *)data; - - seq_printf(f, "%-8llu %-16llu 0x%-6llx " - "%-8lli %-8lli %-8lli 0x%-6x %-24s %-8i %-16s\n", - (u_longlong_t)srh->srh_node.pln_id, srh->start, - (longlong_t)srh->objset, (longlong_t)srh->object, - (longlong_t)srh->level, (longlong_t)srh->blkid, - srh->aflags, srh->origin, srh->pid, srh->comm); - - return (0); -} - -/* Remove oldest elements from list until there are no more than 'size' left */ -static void -spa_read_history_truncate(spa_history_list_t *shl, unsigned int size) -{ - spa_read_history_t *srh; - while (shl->size > size) { - srh = list_remove_head(&shl->procfs_list.pl_list); - ASSERT3P(srh, !=, NULL); - kmem_free(srh, sizeof (spa_read_history_t)); - shl->size--; - } - - if (size == 0) - ASSERT(list_is_empty(&shl->procfs_list.pl_list)); -} - -static int -spa_read_history_clear(procfs_list_t *procfs_list) -{ - spa_history_list_t *shl = procfs_list->pl_private; - mutex_enter(&procfs_list->pl_lock); - spa_read_history_truncate(shl, 0); - mutex_exit(&procfs_list->pl_lock); - return (0); -} - -static void -spa_read_history_init(spa_t *spa) -{ - spa_history_list_t *shl = &spa->spa_stats.read_history; - char *module; - - shl->size = 0; - - module = kmem_asprintf("zfs/%s", spa_name(spa)); - - shl->procfs_list.pl_private = shl; - procfs_list_install(module, - "reads", - 0600, - &shl->procfs_list, - spa_read_history_show, - spa_read_history_show_header, - spa_read_history_clear, - offsetof(spa_read_history_t, srh_node)); - - strfree(module); -} - -static void -spa_read_history_destroy(spa_t *spa) -{ - spa_history_list_t *shl = &spa->spa_stats.read_history; - procfs_list_uninstall(&shl->procfs_list); - spa_read_history_truncate(shl, 0); - procfs_list_destroy(&shl->procfs_list); -} - -void -spa_read_history_add(spa_t *spa, const zbookmark_phys_t *zb, uint32_t aflags) -{ - spa_history_list_t *shl = &spa->spa_stats.read_history; - spa_read_history_t *srh; - - ASSERT3P(spa, !=, NULL); - ASSERT3P(zb, !=, NULL); - - if (zfs_read_history == 0 && shl->size == 0) - return; - - if (zfs_read_history_hits == 0 && (aflags & ARC_FLAG_CACHED)) - return; - - srh = kmem_zalloc(sizeof (spa_read_history_t), KM_SLEEP); - strlcpy(srh->comm, getcomm(), sizeof (srh->comm)); - srh->start = gethrtime(); - srh->objset = zb->zb_objset; - srh->object = zb->zb_object; - srh->level = zb->zb_level; - srh->blkid = zb->zb_blkid; - srh->aflags = aflags; - srh->pid = getpid(); - - mutex_enter(&shl->procfs_list.pl_lock); - - procfs_list_add(&shl->procfs_list, srh); - shl->size++; - - spa_read_history_truncate(shl, zfs_read_history); - - mutex_exit(&shl->procfs_list.pl_lock); -} - -/* - * ========================================================================== - * SPA TXG History Routines - * ========================================================================== - */ - -/* - * Txg statistics - Information exported regarding each txg sync - */ - -typedef struct spa_txg_history { - uint64_t txg; /* txg id */ - txg_state_t state; /* active txg state */ - uint64_t nread; /* number of bytes read */ - uint64_t nwritten; /* number of bytes written */ - uint64_t reads; /* number of read operations */ - uint64_t writes; /* number of write operations */ - uint64_t ndirty; /* number of dirty bytes */ - hrtime_t times[TXG_STATE_COMMITTED]; /* completion times */ - procfs_list_node_t sth_node; -} spa_txg_history_t; - -static int -spa_txg_history_show_header(struct seq_file *f) -{ - seq_printf(f, "%-8s %-16s %-5s %-12s %-12s %-12s " - "%-8s %-8s %-12s %-12s %-12s %-12s\n", "txg", "birth", "state", - "ndirty", "nread", "nwritten", "reads", "writes", - "otime", "qtime", "wtime", "stime"); - return (0); -} - -static int -spa_txg_history_show(struct seq_file *f, void *data) -{ - spa_txg_history_t *sth = (spa_txg_history_t *)data; - uint64_t open = 0, quiesce = 0, wait = 0, sync = 0; - char state; - - switch (sth->state) { - case TXG_STATE_BIRTH: state = 'B'; break; - case TXG_STATE_OPEN: state = 'O'; break; - case TXG_STATE_QUIESCED: state = 'Q'; break; - case TXG_STATE_WAIT_FOR_SYNC: state = 'W'; break; - case TXG_STATE_SYNCED: state = 'S'; break; - case TXG_STATE_COMMITTED: state = 'C'; break; - default: state = '?'; break; - } - - if (sth->times[TXG_STATE_OPEN]) - open = sth->times[TXG_STATE_OPEN] - - sth->times[TXG_STATE_BIRTH]; - - if (sth->times[TXG_STATE_QUIESCED]) - quiesce = sth->times[TXG_STATE_QUIESCED] - - sth->times[TXG_STATE_OPEN]; - - if (sth->times[TXG_STATE_WAIT_FOR_SYNC]) - wait = sth->times[TXG_STATE_WAIT_FOR_SYNC] - - sth->times[TXG_STATE_QUIESCED]; - - if (sth->times[TXG_STATE_SYNCED]) - sync = sth->times[TXG_STATE_SYNCED] - - sth->times[TXG_STATE_WAIT_FOR_SYNC]; - - seq_printf(f, "%-8llu %-16llu %-5c %-12llu " - "%-12llu %-12llu %-8llu %-8llu %-12llu %-12llu %-12llu %-12llu\n", - (longlong_t)sth->txg, sth->times[TXG_STATE_BIRTH], state, - (u_longlong_t)sth->ndirty, - (u_longlong_t)sth->nread, (u_longlong_t)sth->nwritten, - (u_longlong_t)sth->reads, (u_longlong_t)sth->writes, - (u_longlong_t)open, (u_longlong_t)quiesce, (u_longlong_t)wait, - (u_longlong_t)sync); - - return (0); -} - -/* Remove oldest elements from list until there are no more than 'size' left */ -static void -spa_txg_history_truncate(spa_history_list_t *shl, unsigned int size) -{ - spa_txg_history_t *sth; - while (shl->size > size) { - sth = list_remove_head(&shl->procfs_list.pl_list); - ASSERT3P(sth, !=, NULL); - kmem_free(sth, sizeof (spa_txg_history_t)); - shl->size--; - } - - if (size == 0) - ASSERT(list_is_empty(&shl->procfs_list.pl_list)); - -} - -static int -spa_txg_history_clear(procfs_list_t *procfs_list) -{ - spa_history_list_t *shl = procfs_list->pl_private; - mutex_enter(&procfs_list->pl_lock); - spa_txg_history_truncate(shl, 0); - mutex_exit(&procfs_list->pl_lock); - return (0); -} - -static void -spa_txg_history_init(spa_t *spa) -{ - spa_history_list_t *shl = &spa->spa_stats.txg_history; - char *module; - - shl->size = 0; - - module = kmem_asprintf("zfs/%s", spa_name(spa)); - - shl->procfs_list.pl_private = shl; - procfs_list_install(module, - "txgs", - 0644, - &shl->procfs_list, - spa_txg_history_show, - spa_txg_history_show_header, - spa_txg_history_clear, - offsetof(spa_txg_history_t, sth_node)); - - strfree(module); -} - -static void -spa_txg_history_destroy(spa_t *spa) -{ - spa_history_list_t *shl = &spa->spa_stats.txg_history; - procfs_list_uninstall(&shl->procfs_list); - spa_txg_history_truncate(shl, 0); - procfs_list_destroy(&shl->procfs_list); -} - -/* - * Add a new txg to historical record. - */ -void -spa_txg_history_add(spa_t *spa, uint64_t txg, hrtime_t birth_time) -{ - spa_history_list_t *shl = &spa->spa_stats.txg_history; - spa_txg_history_t *sth; - - if (zfs_txg_history == 0 && shl->size == 0) - return; - - sth = kmem_zalloc(sizeof (spa_txg_history_t), KM_SLEEP); - sth->txg = txg; - sth->state = TXG_STATE_OPEN; - sth->times[TXG_STATE_BIRTH] = birth_time; - - mutex_enter(&shl->procfs_list.pl_lock); - procfs_list_add(&shl->procfs_list, sth); - shl->size++; - spa_txg_history_truncate(shl, zfs_txg_history); - mutex_exit(&shl->procfs_list.pl_lock); -} - -/* - * Set txg state completion time and increment current state. - */ -int -spa_txg_history_set(spa_t *spa, uint64_t txg, txg_state_t completed_state, - hrtime_t completed_time) -{ - spa_history_list_t *shl = &spa->spa_stats.txg_history; - spa_txg_history_t *sth; - int error = ENOENT; - - if (zfs_txg_history == 0) - return (0); - - mutex_enter(&shl->procfs_list.pl_lock); - for (sth = list_tail(&shl->procfs_list.pl_list); sth != NULL; - sth = list_prev(&shl->procfs_list.pl_list, sth)) { - if (sth->txg == txg) { - sth->times[completed_state] = completed_time; - sth->state++; - error = 0; - break; - } - } - mutex_exit(&shl->procfs_list.pl_lock); - - return (error); -} - -/* - * Set txg IO stats. - */ -static int -spa_txg_history_set_io(spa_t *spa, uint64_t txg, uint64_t nread, - uint64_t nwritten, uint64_t reads, uint64_t writes, uint64_t ndirty) -{ - spa_history_list_t *shl = &spa->spa_stats.txg_history; - spa_txg_history_t *sth; - int error = ENOENT; - - if (zfs_txg_history == 0) - return (0); - - mutex_enter(&shl->procfs_list.pl_lock); - for (sth = list_tail(&shl->procfs_list.pl_list); sth != NULL; - sth = list_prev(&shl->procfs_list.pl_list, sth)) { - if (sth->txg == txg) { - sth->nread = nread; - sth->nwritten = nwritten; - sth->reads = reads; - sth->writes = writes; - sth->ndirty = ndirty; - error = 0; - break; - } - } - mutex_exit(&shl->procfs_list.pl_lock); - - return (error); -} - -txg_stat_t * -spa_txg_history_init_io(spa_t *spa, uint64_t txg, dsl_pool_t *dp) -{ - txg_stat_t *ts; - - if (zfs_txg_history == 0) - return (NULL); - - ts = kmem_alloc(sizeof (txg_stat_t), KM_SLEEP); - - spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER); - vdev_get_stats(spa->spa_root_vdev, &ts->vs1); - spa_config_exit(spa, SCL_CONFIG, FTAG); - - ts->txg = txg; - ts->ndirty = dp->dp_dirty_pertxg[txg & TXG_MASK]; - - spa_txg_history_set(spa, txg, TXG_STATE_WAIT_FOR_SYNC, gethrtime()); - - return (ts); -} - -void -spa_txg_history_fini_io(spa_t *spa, txg_stat_t *ts) -{ - if (ts == NULL) - return; - - if (zfs_txg_history == 0) { - kmem_free(ts, sizeof (txg_stat_t)); - return; - } - - spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER); - vdev_get_stats(spa->spa_root_vdev, &ts->vs2); - spa_config_exit(spa, SCL_CONFIG, FTAG); - - spa_txg_history_set(spa, ts->txg, TXG_STATE_SYNCED, gethrtime()); - spa_txg_history_set_io(spa, ts->txg, - ts->vs2.vs_bytes[ZIO_TYPE_READ] - ts->vs1.vs_bytes[ZIO_TYPE_READ], - ts->vs2.vs_bytes[ZIO_TYPE_WRITE] - ts->vs1.vs_bytes[ZIO_TYPE_WRITE], - ts->vs2.vs_ops[ZIO_TYPE_READ] - ts->vs1.vs_ops[ZIO_TYPE_READ], - ts->vs2.vs_ops[ZIO_TYPE_WRITE] - ts->vs1.vs_ops[ZIO_TYPE_WRITE], - ts->ndirty); - - kmem_free(ts, sizeof (txg_stat_t)); -} - -/* - * ========================================================================== - * SPA TX Assign Histogram Routines - * ========================================================================== - */ - -/* - * Tx statistics - Information exported regarding dmu_tx_assign time. - */ - -/* - * When the kstat is written zero all buckets. When the kstat is read - * count the number of trailing buckets set to zero and update ks_ndata - * such that they are not output. - */ -static int -spa_tx_assign_update(kstat_t *ksp, int rw) -{ - spa_t *spa = ksp->ks_private; - spa_history_kstat_t *shk = &spa->spa_stats.tx_assign_histogram; - int i; - - if (rw == KSTAT_WRITE) { - for (i = 0; i < shk->count; i++) - ((kstat_named_t *)shk->private)[i].value.ui64 = 0; - } - - for (i = shk->count; i > 0; i--) - if (((kstat_named_t *)shk->private)[i-1].value.ui64 != 0) - break; - - ksp->ks_ndata = i; - ksp->ks_data_size = i * sizeof (kstat_named_t); - - return (0); -} - -static void -spa_tx_assign_init(spa_t *spa) -{ - spa_history_kstat_t *shk = &spa->spa_stats.tx_assign_histogram; - char *name; - kstat_named_t *ks; - kstat_t *ksp; - int i; - - mutex_init(&shk->lock, NULL, MUTEX_DEFAULT, NULL); - - shk->count = 42; /* power of two buckets for 1ns to 2,199s */ - shk->size = shk->count * sizeof (kstat_named_t); - shk->private = kmem_alloc(shk->size, KM_SLEEP); - - name = kmem_asprintf("zfs/%s", spa_name(spa)); - - for (i = 0; i < shk->count; i++) { - ks = &((kstat_named_t *)shk->private)[i]; - ks->data_type = KSTAT_DATA_UINT64; - ks->value.ui64 = 0; - (void) snprintf(ks->name, KSTAT_STRLEN, "%llu ns", - (u_longlong_t)1 << i); - } - - ksp = kstat_create(name, 0, "dmu_tx_assign", "misc", - KSTAT_TYPE_NAMED, 0, KSTAT_FLAG_VIRTUAL); - shk->kstat = ksp; - - if (ksp) { - ksp->ks_lock = &shk->lock; - ksp->ks_data = shk->private; - ksp->ks_ndata = shk->count; - ksp->ks_data_size = shk->size; - ksp->ks_private = spa; - ksp->ks_update = spa_tx_assign_update; - kstat_install(ksp); - } - strfree(name); -} - -static void -spa_tx_assign_destroy(spa_t *spa) -{ - spa_history_kstat_t *shk = &spa->spa_stats.tx_assign_histogram; - kstat_t *ksp; - - ksp = shk->kstat; - if (ksp) - kstat_delete(ksp); - - kmem_free(shk->private, shk->size); - mutex_destroy(&shk->lock); -} - -void -spa_tx_assign_add_nsecs(spa_t *spa, uint64_t nsecs) -{ - spa_history_kstat_t *shk = &spa->spa_stats.tx_assign_histogram; - uint64_t idx = 0; - - while (((1ULL << idx) < nsecs) && (idx < shk->size - 1)) - idx++; - - atomic_inc_64(&((kstat_named_t *)shk->private)[idx].value.ui64); -} - -/* - * ========================================================================== - * SPA IO History Routines - * ========================================================================== - */ -static int -spa_io_history_update(kstat_t *ksp, int rw) -{ - if (rw == KSTAT_WRITE) - memset(ksp->ks_data, 0, ksp->ks_data_size); - - return (0); -} - -static void -spa_io_history_init(spa_t *spa) -{ - spa_history_kstat_t *shk = &spa->spa_stats.io_history; - char *name; - kstat_t *ksp; - - mutex_init(&shk->lock, NULL, MUTEX_DEFAULT, NULL); - - name = kmem_asprintf("zfs/%s", spa_name(spa)); - - ksp = kstat_create(name, 0, "io", "disk", KSTAT_TYPE_IO, 1, 0); - shk->kstat = ksp; - - if (ksp) { - ksp->ks_lock = &shk->lock; - ksp->ks_private = spa; - ksp->ks_update = spa_io_history_update; - kstat_install(ksp); - } - strfree(name); -} - -static void -spa_io_history_destroy(spa_t *spa) -{ - spa_history_kstat_t *shk = &spa->spa_stats.io_history; - - if (shk->kstat) - kstat_delete(shk->kstat); - - mutex_destroy(&shk->lock); -} - -/* - * ========================================================================== - * SPA MMP History Routines - * ========================================================================== - */ - -/* - * MMP statistics - Information exported regarding attempted MMP writes - * For MMP writes issued, fields used as per comments below. - * For MMP writes skipped, an entry represents a span of time when - * writes were skipped for same reason (error from mmp_random_leaf). - * Differences are: - * timestamp time first write skipped, if >1 skipped in a row - * mmp_delay delay value at timestamp - * vdev_guid number of writes skipped - * io_error one of enum mmp_error - * duration time span (ns) of skipped writes - */ - -typedef struct spa_mmp_history { - uint64_t mmp_node_id; /* unique # for updates */ - uint64_t txg; /* txg of last sync */ - uint64_t timestamp; /* UTC time MMP write issued */ - uint64_t mmp_delay; /* mmp_thread.mmp_delay at timestamp */ - uint64_t vdev_guid; /* unique ID of leaf vdev */ - char *vdev_path; - int vdev_label; /* vdev label */ - int io_error; /* error status of MMP write */ - hrtime_t error_start; /* hrtime of start of error period */ - hrtime_t duration; /* time from submission to completion */ - procfs_list_node_t smh_node; -} spa_mmp_history_t; - -static int -spa_mmp_history_show_header(struct seq_file *f) -{ - seq_printf(f, "%-10s %-10s %-10s %-6s %-10s %-12s %-24s " - "%-10s %s\n", "id", "txg", "timestamp", "error", "duration", - "mmp_delay", "vdev_guid", "vdev_label", "vdev_path"); - return (0); -} - -static int -spa_mmp_history_show(struct seq_file *f, void *data) -{ - spa_mmp_history_t *smh = (spa_mmp_history_t *)data; - char skip_fmt[] = "%-10llu %-10llu %10llu %#6llx %10lld %12llu %-24llu " - "%-10lld %s\n"; - char write_fmt[] = "%-10llu %-10llu %10llu %6lld %10lld %12llu %-24llu " - "%-10lld %s\n"; - - seq_printf(f, (smh->error_start ? skip_fmt : write_fmt), - (u_longlong_t)smh->mmp_node_id, (u_longlong_t)smh->txg, - (u_longlong_t)smh->timestamp, (longlong_t)smh->io_error, - (longlong_t)smh->duration, (u_longlong_t)smh->mmp_delay, - (u_longlong_t)smh->vdev_guid, (u_longlong_t)smh->vdev_label, - (smh->vdev_path ? smh->vdev_path : "-")); - - return (0); -} - -/* Remove oldest elements from list until there are no more than 'size' left */ -static void -spa_mmp_history_truncate(spa_history_list_t *shl, unsigned int size) -{ - spa_mmp_history_t *smh; - while (shl->size > size) { - smh = list_remove_head(&shl->procfs_list.pl_list); - if (smh->vdev_path) - strfree(smh->vdev_path); - kmem_free(smh, sizeof (spa_mmp_history_t)); - shl->size--; - } - - if (size == 0) - ASSERT(list_is_empty(&shl->procfs_list.pl_list)); - -} - -static int -spa_mmp_history_clear(procfs_list_t *procfs_list) -{ - spa_history_list_t *shl = procfs_list->pl_private; - mutex_enter(&procfs_list->pl_lock); - spa_mmp_history_truncate(shl, 0); - mutex_exit(&procfs_list->pl_lock); - return (0); -} - -static void -spa_mmp_history_init(spa_t *spa) -{ - spa_history_list_t *shl = &spa->spa_stats.mmp_history; - char *module; - - shl->size = 0; - - module = kmem_asprintf("zfs/%s", spa_name(spa)); - - shl->procfs_list.pl_private = shl; - procfs_list_install(module, - "multihost", - 0644, - &shl->procfs_list, - spa_mmp_history_show, - spa_mmp_history_show_header, - spa_mmp_history_clear, - offsetof(spa_mmp_history_t, smh_node)); - - strfree(module); -} - -static void -spa_mmp_history_destroy(spa_t *spa) -{ - spa_history_list_t *shl = &spa->spa_stats.mmp_history; - procfs_list_uninstall(&shl->procfs_list); - spa_mmp_history_truncate(shl, 0); - procfs_list_destroy(&shl->procfs_list); -} - -/* - * Set duration in existing "skip" record to how long we have waited for a leaf - * vdev to become available. - * - * Important that we start search at the tail of the list where new - * records are inserted, so this is normally an O(1) operation. - */ -int -spa_mmp_history_set_skip(spa_t *spa, uint64_t mmp_node_id) -{ - spa_history_list_t *shl = &spa->spa_stats.mmp_history; - spa_mmp_history_t *smh; - int error = ENOENT; - - if (zfs_multihost_history == 0 && shl->size == 0) - return (0); - - mutex_enter(&shl->procfs_list.pl_lock); - for (smh = list_tail(&shl->procfs_list.pl_list); smh != NULL; - smh = list_prev(&shl->procfs_list.pl_list, smh)) { - if (smh->mmp_node_id == mmp_node_id) { - ASSERT3U(smh->io_error, !=, 0); - smh->duration = gethrtime() - smh->error_start; - smh->vdev_guid++; - error = 0; - break; - } - } - mutex_exit(&shl->procfs_list.pl_lock); - - return (error); -} - -/* - * Set MMP write duration and error status in existing record. - * See comment re: search order above spa_mmp_history_set_skip(). - */ -int -spa_mmp_history_set(spa_t *spa, uint64_t mmp_node_id, int io_error, - hrtime_t duration) -{ - spa_history_list_t *shl = &spa->spa_stats.mmp_history; - spa_mmp_history_t *smh; - int error = ENOENT; - - if (zfs_multihost_history == 0 && shl->size == 0) - return (0); - - mutex_enter(&shl->procfs_list.pl_lock); - for (smh = list_tail(&shl->procfs_list.pl_list); smh != NULL; - smh = list_prev(&shl->procfs_list.pl_list, smh)) { - if (smh->mmp_node_id == mmp_node_id) { - ASSERT(smh->io_error == 0); - smh->io_error = io_error; - smh->duration = duration; - error = 0; - break; - } - } - mutex_exit(&shl->procfs_list.pl_lock); - - return (error); -} - -/* - * Add a new MMP historical record. - * error == 0 : a write was issued. - * error != 0 : a write was not issued because no leaves were found. - */ -void -spa_mmp_history_add(spa_t *spa, uint64_t txg, uint64_t timestamp, - uint64_t mmp_delay, vdev_t *vd, int label, uint64_t mmp_node_id, - int error) -{ - spa_history_list_t *shl = &spa->spa_stats.mmp_history; - spa_mmp_history_t *smh; - - if (zfs_multihost_history == 0 && shl->size == 0) - return; - - smh = kmem_zalloc(sizeof (spa_mmp_history_t), KM_SLEEP); - smh->txg = txg; - smh->timestamp = timestamp; - smh->mmp_delay = mmp_delay; - if (vd) { - smh->vdev_guid = vd->vdev_guid; - if (vd->vdev_path) - smh->vdev_path = strdup(vd->vdev_path); - } - smh->vdev_label = label; - smh->mmp_node_id = mmp_node_id; - - if (error) { - smh->io_error = error; - smh->error_start = gethrtime(); - smh->vdev_guid = 1; - } - - mutex_enter(&shl->procfs_list.pl_lock); - procfs_list_add(&shl->procfs_list, smh); - shl->size++; - spa_mmp_history_truncate(shl, zfs_multihost_history); - mutex_exit(&shl->procfs_list.pl_lock); -} - -static void * -spa_state_addr(kstat_t *ksp, loff_t n) -{ - return (ksp->ks_private); /* return the spa_t */ -} - -static int -spa_state_data(char *buf, size_t size, void *data) -{ - spa_t *spa = (spa_t *)data; - (void) snprintf(buf, size, "%s\n", spa_state_to_name(spa)); - return (0); -} - -/* - * Return the state of the pool in /proc/spl/kstat/zfs/<pool>/state. - * - * This is a lock-less read of the pool's state (unlike using 'zpool', which - * can potentially block for seconds). Because it doesn't block, it can useful - * as a pool heartbeat value. - */ -static void -spa_state_init(spa_t *spa) -{ - spa_history_kstat_t *shk = &spa->spa_stats.state; - char *name; - kstat_t *ksp; - - mutex_init(&shk->lock, NULL, MUTEX_DEFAULT, NULL); - - name = kmem_asprintf("zfs/%s", spa_name(spa)); - ksp = kstat_create(name, 0, "state", "misc", - KSTAT_TYPE_RAW, 0, KSTAT_FLAG_VIRTUAL); - - shk->kstat = ksp; - if (ksp) { - ksp->ks_lock = &shk->lock; - ksp->ks_data = NULL; - ksp->ks_private = spa; - ksp->ks_flags |= KSTAT_FLAG_NO_HEADERS; - kstat_set_raw_ops(ksp, NULL, spa_state_data, spa_state_addr); - kstat_install(ksp); - } - - strfree(name); -} - -static void -spa_health_destroy(spa_t *spa) -{ - spa_history_kstat_t *shk = &spa->spa_stats.state; - kstat_t *ksp = shk->kstat; - if (ksp) - kstat_delete(ksp); - - mutex_destroy(&shk->lock); -} - -static spa_iostats_t spa_iostats_template = { - { "trim_extents_written", KSTAT_DATA_UINT64 }, - { "trim_bytes_written", KSTAT_DATA_UINT64 }, - { "trim_extents_skipped", KSTAT_DATA_UINT64 }, - { "trim_bytes_skipped", KSTAT_DATA_UINT64 }, - { "trim_extents_failed", KSTAT_DATA_UINT64 }, - { "trim_bytes_failed", KSTAT_DATA_UINT64 }, - { "autotrim_extents_written", KSTAT_DATA_UINT64 }, - { "autotrim_bytes_written", KSTAT_DATA_UINT64 }, - { "autotrim_extents_skipped", KSTAT_DATA_UINT64 }, - { "autotrim_bytes_skipped", KSTAT_DATA_UINT64 }, - { "autotrim_extents_failed", KSTAT_DATA_UINT64 }, - { "autotrim_bytes_failed", KSTAT_DATA_UINT64 }, -}; - -#define SPA_IOSTATS_ADD(stat, val) \ - atomic_add_64(&iostats->stat.value.ui64, (val)); - -void -spa_iostats_trim_add(spa_t *spa, trim_type_t type, - uint64_t extents_written, uint64_t bytes_written, - uint64_t extents_skipped, uint64_t bytes_skipped, - uint64_t extents_failed, uint64_t bytes_failed) -{ - spa_history_kstat_t *shk = &spa->spa_stats.iostats; - kstat_t *ksp = shk->kstat; - spa_iostats_t *iostats; - - if (ksp == NULL) - return; - - iostats = ksp->ks_data; - if (type == TRIM_TYPE_MANUAL) { - SPA_IOSTATS_ADD(trim_extents_written, extents_written); - SPA_IOSTATS_ADD(trim_bytes_written, bytes_written); - SPA_IOSTATS_ADD(trim_extents_skipped, extents_skipped); - SPA_IOSTATS_ADD(trim_bytes_skipped, bytes_skipped); - SPA_IOSTATS_ADD(trim_extents_failed, extents_failed); - SPA_IOSTATS_ADD(trim_bytes_failed, bytes_failed); - } else { - SPA_IOSTATS_ADD(autotrim_extents_written, extents_written); - SPA_IOSTATS_ADD(autotrim_bytes_written, bytes_written); - SPA_IOSTATS_ADD(autotrim_extents_skipped, extents_skipped); - SPA_IOSTATS_ADD(autotrim_bytes_skipped, bytes_skipped); - SPA_IOSTATS_ADD(autotrim_extents_failed, extents_failed); - SPA_IOSTATS_ADD(autotrim_bytes_failed, bytes_failed); - } -} - -int -spa_iostats_update(kstat_t *ksp, int rw) -{ - if (rw == KSTAT_WRITE) { - memcpy(ksp->ks_data, &spa_iostats_template, - sizeof (spa_iostats_t)); - } - - return (0); -} - -static void -spa_iostats_init(spa_t *spa) -{ - spa_history_kstat_t *shk = &spa->spa_stats.iostats; - - mutex_init(&shk->lock, NULL, MUTEX_DEFAULT, NULL); - - char *name = kmem_asprintf("zfs/%s", spa_name(spa)); - kstat_t *ksp = kstat_create(name, 0, "iostats", "misc", - KSTAT_TYPE_NAMED, sizeof (spa_iostats_t) / sizeof (kstat_named_t), - KSTAT_FLAG_VIRTUAL); - - shk->kstat = ksp; - if (ksp) { - int size = sizeof (spa_iostats_t); - ksp->ks_lock = &shk->lock; - ksp->ks_private = spa; - ksp->ks_update = spa_iostats_update; - ksp->ks_data = kmem_alloc(size, KM_SLEEP); - memcpy(ksp->ks_data, &spa_iostats_template, size); - kstat_install(ksp); - } - - strfree(name); -} - -static void -spa_iostats_destroy(spa_t *spa) -{ - spa_history_kstat_t *shk = &spa->spa_stats.iostats; - kstat_t *ksp = shk->kstat; - if (ksp) { - kmem_free(ksp->ks_data, sizeof (spa_iostats_t)); - kstat_delete(ksp); - } - - mutex_destroy(&shk->lock); -} - -void -spa_stats_init(spa_t *spa) -{ - spa_read_history_init(spa); - spa_txg_history_init(spa); - spa_tx_assign_init(spa); - spa_io_history_init(spa); - spa_mmp_history_init(spa); - spa_state_init(spa); - spa_iostats_init(spa); -} - -void -spa_stats_destroy(spa_t *spa) -{ - spa_iostats_destroy(spa); - spa_health_destroy(spa); - spa_tx_assign_destroy(spa); - spa_txg_history_destroy(spa); - spa_read_history_destroy(spa); - spa_io_history_destroy(spa); - spa_mmp_history_destroy(spa); -} - -#if defined(_KERNEL) -/* CSTYLED */ -module_param(zfs_read_history, int, 0644); -MODULE_PARM_DESC(zfs_read_history, - "Historical statistics for the last N reads"); - -module_param(zfs_read_history_hits, int, 0644); -MODULE_PARM_DESC(zfs_read_history_hits, - "Include cache hits in read history"); - -module_param(zfs_txg_history, int, 0644); -MODULE_PARM_DESC(zfs_txg_history, - "Historical statistics for the last N txgs"); - -module_param(zfs_multihost_history, int, 0644); -MODULE_PARM_DESC(zfs_multihost_history, - "Historical statistics for last N multihost writes"); -/* END CSTYLED */ -#endif |