X-Git-Url: https://git.camperquake.de/gitweb.cgi?a=blobdiff_plain;f=module%2Fzfs%2Fdsl_pool.c;h=7795d8045e92d71c148c7594e64c218ceb31e9e0;hb=dba1d705669cf0e33091622d0e950b9459b20e2e;hp=704f034e9ee0842193f73744f7b7decb4fbf3551;hpb=753c38392ddff9d3cf140bb4d28f3bfba52c92d2;p=zfs.git

diff --git a/module/zfs/dsl_pool.c b/module/zfs/dsl_pool.c
index 704f034..7795d80 100644
--- a/module/zfs/dsl_pool.c
+++ b/module/zfs/dsl_pool.c
@@ -58,6 +58,63 @@ kmutex_t zfs_write_limit_lock;
 
 static pgcnt_t old_physmem = 0;
 
+static void
+dsl_pool_tx_assign_init(dsl_pool_t *dp, unsigned int ndata)
+{
+	kstat_named_t *ks;
+	char name[KSTAT_STRLEN];
+	int i, data_size = ndata * sizeof(kstat_named_t);
+
+	(void) snprintf(name, KSTAT_STRLEN, "dmu_tx_assign-%s",
+			spa_name(dp->dp_spa));
+
+	dp->dp_tx_assign_size = ndata;
+
+	if (data_size)
+		dp->dp_tx_assign_buckets = kmem_alloc(data_size, KM_SLEEP);
+	else
+		dp->dp_tx_assign_buckets = NULL;
+
+	for (i = 0; i < dp->dp_tx_assign_size; i++) {
+		ks = &dp->dp_tx_assign_buckets[i];
+		ks->data_type = KSTAT_DATA_UINT64;
+		ks->value.ui64 = 0;
+		(void) snprintf(ks->name, KSTAT_STRLEN, "%u us", 1 << i);
+	}
+
+	dp->dp_tx_assign_kstat = kstat_create("zfs", 0, name, "misc",
+	    KSTAT_TYPE_NAMED, 0, KSTAT_FLAG_VIRTUAL);
+
+	if (dp->dp_tx_assign_kstat) {
+		dp->dp_tx_assign_kstat->ks_data = dp->dp_tx_assign_buckets;
+		dp->dp_tx_assign_kstat->ks_ndata = dp->dp_tx_assign_size;
+		dp->dp_tx_assign_kstat->ks_data_size = data_size;
+		kstat_install(dp->dp_tx_assign_kstat);
+	}
+}
+
+static void
+dsl_pool_tx_assign_destroy(dsl_pool_t *dp)
+{
+	if (dp->dp_tx_assign_buckets)
+		kmem_free(dp->dp_tx_assign_buckets,
+			  dp->dp_tx_assign_size * sizeof(kstat_named_t));
+
+	if (dp->dp_tx_assign_kstat)
+		kstat_delete(dp->dp_tx_assign_kstat);
+}
+
+void
+dsl_pool_tx_assign_add_usecs(dsl_pool_t *dp, uint64_t usecs)
+{
+	uint64_t idx = 0;
+
+	while (((1 << idx) < usecs) && (idx < dp->dp_tx_assign_size - 1))
+		idx++;
+
+	atomic_inc_64(&dp->dp_tx_assign_buckets[idx].value.ui64);
+}
+
 static int
 dsl_pool_txg_history_update(kstat_t *ksp, int rw)
 {
@@ -143,7 +200,7 @@ dsl_pool_txg_history_add(dsl_pool_t *dp, uint64_t txg)
 {
 	txg_history_t *th, *rm;
 
-	th = kmem_zalloc(sizeof(txg_history_t), KM_SLEEP);
+	th = kmem_zalloc(sizeof(txg_history_t), KM_PUSHPAGE);
 	mutex_init(&th->th_lock, NULL, MUTEX_DEFAULT, NULL);
 	th->th_kstat.txg = txg;
 	th->th_kstat.state = TXG_STATE_OPEN;
@@ -238,6 +295,7 @@ dsl_pool_open_impl(spa_t *spa, uint64_t txg)
 	    1, 4, 0);
 
 	dsl_pool_txg_history_init(dp, txg);
+	dsl_pool_tx_assign_init(dp, 32);
 
 	return (dp);
 }
@@ -379,6 +437,7 @@ dsl_pool_close(dsl_pool_t *dp)
 	arc_flush(dp->dp_spa);
 	txg_fini(dp);
 	dsl_scan_fini(dp);
+	dsl_pool_tx_assign_destroy(dp);
 	dsl_pool_txg_history_destroy(dp);
 	rw_destroy(&dp->dp_config_rwlock);
 	mutex_destroy(&dp->dp_lock);
@@ -405,7 +464,7 @@ dsl_pool_create(spa_t *spa, nvlist_t *zplprops, uint64_t txg)
 	/* create the pool directory */
 	err = zap_create_claim(dp->dp_meta_objset, DMU_POOL_DIRECTORY_OBJECT,
 	    DMU_OT_OBJECT_DIRECTORY, DMU_OT_NONE, 0, tx);
-	ASSERT3U(err, ==, 0);
+	ASSERT0(err);
 
 	/* Initialize scan structures */
 	VERIFY3U(0, ==, dsl_scan_init(dp, txg));