diff options
| author | Brian Behlendorf <[email protected]> | 2013-10-02 11:43:52 -0700 |
|---|---|---|
| committer | Brian Behlendorf <[email protected]> | 2013-10-25 13:57:25 -0700 |
| commit | 2d37239a28b8b2ddc0e8312093f8d8810c6351fa (patch) | |
| tree | 93885704a95285d91b28baca4df8fe57ea3efcf5 /module/zfs/dmu_tx.c | |
| parent | 0b1401ee911c5a0c0bdb7a8e6ad36840cea3af24 (diff) | |
Add visibility in to dmu_tx_assign times
This change adds a new kstat to gain some visibility into the
amount of time spent in each call to dmu_tx_assign. A histogram
is exported via the new dmu_tx_assign file. The information
contained in this histogram is the frequency dmu_tx_assign
took to complete given an interval range.
Signed-off-by: Prakash Surya <[email protected]>
Signed-off-by: Brian Behlendorf <[email protected]>
Diffstat (limited to 'module/zfs/dmu_tx.c')
| -rw-r--r-- | module/zfs/dmu_tx.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/module/zfs/dmu_tx.c b/module/zfs/dmu_tx.c index 17982a04e..7b6223956 100644 --- a/module/zfs/dmu_tx.c +++ b/module/zfs/dmu_tx.c @@ -1077,12 +1077,15 @@ dmu_tx_unassign(dmu_tx_t *tx) int dmu_tx_assign(dmu_tx_t *tx, txg_how_t txg_how) { + hrtime_t before; int err; ASSERT(tx->tx_txg == 0); ASSERT(txg_how == TXG_WAIT || txg_how == TXG_NOWAIT); ASSERT(!dsl_pool_sync_context(tx->tx_pool)); + before = gethrtime(); + /* If we might wait, we must not hold the config lock. */ ASSERT(txg_how != TXG_WAIT || !dsl_pool_config_held(tx->tx_pool)); @@ -1097,6 +1100,8 @@ dmu_tx_assign(dmu_tx_t *tx, txg_how_t txg_how) txg_rele_to_quiesce(&tx->tx_txgh); + spa_tx_assign_add_nsecs(tx->tx_pool->dp_spa, gethrtime() - before); + return (0); } |