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Add KSTAT_TYPE_TXG type

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Add a new kstat type for tracking useful statistics about a TXG.
The new KSTAT_TYPE_TXG type can be used to tracks the following
statistics per-txg.

  txg          - Unique txg number
  state        - State (O)pen/(Q)uiescing/(S)yncing/(C)ommitted
  birth;       - Creation time
  nread        - Bytes read
  nwritten;    - Bytes written
  reads        - IOPs read
  writes       - IOPs write
  open_time;   - Length in nanoseconds the txg was open
  quiesce_time - Length in nanoseconds the txg was quiescing
  sync_time;   - Length in nanoseconds the txg was syncing

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
This commit is contained in:
Brian Behlendorf
2012-10-22 16:57:27 -07:00
parent 71c9f0b003
commit dba79fcbf2
2 changed files with 61 additions and 1 deletions
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include/sys/kstat.h
+22 -1
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@@ -43,7 +43,8 @@
#define KSTAT_TYPE_INTR 2 /* interrupt stats; ks_ndata == 1 */
#define KSTAT_TYPE_IO 3 /* I/O stats; ks_ndata == 1 */
#define KSTAT_TYPE_TIMER 4 /* event timer; ks_ndata >= 1 */
#define KSTAT_NUM_TYPES 5
#define KSTAT_TYPE_TXG 5 /* txg sync; ks_ndata >= 1 */
#define KSTAT_NUM_TYPES 6
#define KSTAT_DATA_CHAR 0
#define KSTAT_DATA_INT32 1
@@ -156,6 +157,26 @@ typedef struct kstat_timer {
hrtime_t stop_time; /* previous event stop time */
} kstat_timer_t;
typedef enum kstat_txg_state {
TXG_STATE_OPEN = 1,
TXG_STATE_QUIESCING = 2,
TXG_STATE_SYNCING = 3,
TXG_STATE_COMMITTED = 4,
} kstat_txg_state_t;
typedef struct kstat_txg {
u_longlong_t txg; /* txg id */
kstat_txg_state_t state; /* txg state */
hrtime_t birth; /* birth time stamp */
u_longlong_t nread; /* number of bytes read */
u_longlong_t nwritten; /* number of bytes written */
uint_t reads; /* number of read operations */
uint_t writes; /* number of write operations */
hrtime_t open_time; /* open time */
hrtime_t quiesce_time;/* quiesce time */
hrtime_t sync_time; /* sync time */
} kstat_txg_t;
int spl_kstat_init(void);
void spl_kstat_fini(void);