diff options
| author | Brian Behlendorf <[email protected]> | 2012-01-20 10:58:57 -0800 |
|---|---|---|
| committer | Brian Behlendorf <[email protected]> | 2012-02-27 08:59:10 -0800 |
| commit | 570827e129ed81e066e894530bbe24642f473154 (patch) | |
| tree | 90e9128a73735df10392a24280ade08031051b68 /module/zfs/arc.c | |
| parent | 13be560d89e9de63bdf63e8187af2ceb90cf094d (diff) | |
Add 'dmu_tx' kstats entry
Keep counters for the various reasons that a thread may end up
in txg_wait_open() waiting on a new txg. This can be useful
when attempting to determine why a particular workload is
under performing.
Signed-off-by: Brian Behlendorf <[email protected]>
Diffstat (limited to 'module/zfs/arc.c')
| -rw-r--r-- | module/zfs/arc.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/module/zfs/arc.c b/module/zfs/arc.c index cfd4c7981..10317b642 100644 --- a/module/zfs/arc.c +++ b/module/zfs/arc.c @@ -138,6 +138,7 @@ #endif #include <sys/callb.h> #include <sys/kstat.h> +#include <sys/dmu_tx.h> #include <zfs_fletcher.h> static kmutex_t arc_reclaim_thr_lock; @@ -3584,6 +3585,7 @@ arc_memory_throttle(uint64_t reserve, uint64_t inflight_data, uint64_t txg) } else if (page_load > 0 && arc_reclaim_needed()) { /* memory is low, delay before restarting */ ARCSTAT_INCR(arcstat_memory_throttle_count, 1); + DMU_TX_STAT_BUMP(dmu_tx_memory_reclaim); return (EAGAIN); } page_load = 0; @@ -3599,6 +3601,7 @@ arc_memory_throttle(uint64_t reserve, uint64_t inflight_data, uint64_t txg) if (inflight_data > available_memory / 4) { ARCSTAT_INCR(arcstat_memory_throttle_count, 1); + DMU_TX_STAT_BUMP(dmu_tx_memory_inflight); return (ERESTART); } #endif @@ -3629,8 +3632,10 @@ arc_tempreserve_space(uint64_t reserve, uint64_t txg) #endif if (reserve > arc_c/4 && !arc_no_grow) arc_c = MIN(arc_c_max, reserve * 4); - if (reserve > arc_c) + if (reserve > arc_c) { + DMU_TX_STAT_BUMP(dmu_tx_memory_reserve); return (ENOMEM); + } /* * Don't count loaned bufs as in flight dirty data to prevent long @@ -3663,6 +3668,7 @@ arc_tempreserve_space(uint64_t reserve, uint64_t txg) arc_anon->arcs_lsize[ARC_BUFC_METADATA]>>10, arc_anon->arcs_lsize[ARC_BUFC_DATA]>>10, reserve>>10, arc_c>>10); + DMU_TX_STAT_BUMP(dmu_tx_dirty_throttle); return (ERESTART); } atomic_add_64(&arc_tempreserve, reserve); |