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Add 'dmu_tx' kstats entry

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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 <behlendorf1@llnl.gov>
This commit is contained in:
Brian Behlendorf
2012-01-20 10:58:57 -08:00
parent 13be560d89
commit 570827e129
7 changed files with 93 additions and 4 deletions
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include/sys/dmu_tx.h
+28
View File
@@ -104,6 +104,31 @@ typedef struct dmu_tx_callback {
void *dcb_data; /* caller private data */
} dmu_tx_callback_t;
/*
* Used for dmu tx kstat.
*/
typedef struct dmu_tx_stats {
kstat_named_t dmu_tx_assigned;
kstat_named_t dmu_tx_delay;
kstat_named_t dmu_tx_error;
kstat_named_t dmu_tx_suspended;
kstat_named_t dmu_tx_group;
kstat_named_t dmu_tx_how;
kstat_named_t dmu_tx_memory_reserve;
kstat_named_t dmu_tx_memory_reclaim;
kstat_named_t dmu_tx_memory_inflight;
kstat_named_t dmu_tx_dirty_throttle;
kstat_named_t dmu_tx_write_limit;
kstat_named_t dmu_tx_quota;
} dmu_tx_stats_t;
extern dmu_tx_stats_t dmu_tx_stats;
#define DMU_TX_STAT_INCR(stat, val) \
atomic_add_64(&dmu_tx_stats.stat.value.ui64, (val));
#define DMU_TX_STAT_BUMP(stat) \
DMU_TX_STAT_INCR(stat, 1);
/*
* These routines are defined in dmu.h, and are called by the user.
*/
@@ -141,6 +166,9 @@ void dmu_tx_hold_space(dmu_tx_t *tx, uint64_t space);
#define DMU_TX_DIRTY_BUF(tx, db)
#endif
void dmu_tx_init(void);
void dmu_tx_fini(void);
#ifdef __cplusplus
}
#endif