diff options
| author | Brian Behlendorf <[email protected]> | 2012-10-23 13:48:22 -0700 |
|---|---|---|
| committer | Brian Behlendorf <[email protected]> | 2012-11-02 15:45:56 -0700 |
| commit | e95853a331529a6cb96fdf10476c53441e59f4e1 (patch) | |
| tree | 30f0809324bb570d1e97ccbee054f1f0484d4668 /lib | |
| parent | e8fd45a0f975c6b8ae8cd644714fc21f14fac2bf (diff) | |
Add txgs-<pool> kstat file
Create a kstat file which contains useful statistics about the
last N txgs processed. This can be helpful when analyzing pool
performance. The new KSTAT_TYPE_TXG type was added for this
purpose and it 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 <[email protected]>
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/libspl/include/sys/kstat.h | 27 |
1 files changed, 26 insertions, 1 deletions
diff --git a/lib/libspl/include/sys/kstat.h b/lib/libspl/include/sys/kstat.h index fcd3ed98b..6bd2ec878 100644 --- a/lib/libspl/include/sys/kstat.h +++ b/lib/libspl/include/sys/kstat.h @@ -228,8 +228,10 @@ typedef struct kstat32 { /* ks_ndata == 1 */ #define KSTAT_TYPE_TIMER 4 /* event timer */ /* ks_ndata >= 1 */ +#define KSTAT_TYPE_TXG 5 /* txg statistics */ + /* ks_ndata >= 0 */ -#define KSTAT_NUM_TYPES 5 +#define KSTAT_NUM_TYPES 6 /* * kstat class @@ -698,6 +700,29 @@ typedef struct kstat_timer { #define KSTAT_TIMER_PTR(kptr) ((kstat_timer_t *)(kptr)->ks_data) +/* + * TXG statistics - bytes read/written and iops performed + */ +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; + #if defined(_KERNEL) #include <sys/t_lock.h> |