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zil: Add some more statistics.

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In addition to a number of actual log bytes written, account also a
total written bytes including padding and total allocated bytes (bytes
<= write <= alloc).  It should allow to monitor zil traffic and space
efficiency.

Add dtrace probe for zil block size selection.

Make zilstat report more information and fit it into less width.

Reviewed-by: Ameer Hamza <ahamza@ixsystems.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by:  Alexander Motin <mav@FreeBSD.org>
Sponsored by:   iXsystems, Inc.
Closes #14863
This commit is contained in:
Alexander Motin
2023-05-25 16:51:53 -04:00
committed by GitHub
parent f63811f072
commit b6fbe61fa6
6 changed files with 213 additions and 52 deletions
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include/sys/zil.h
+10 -2
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@@ -489,18 +489,22 @@ typedef struct zil_stats {
* Transactions which have been allocated to the "normal"
* (i.e. not slog) storage pool. Note that "bytes" accumulate
* the actual log record sizes - which do not include the actual
* data in case of indirect writes.
* data in case of indirect writes. bytes <= write <= alloc.
*/
kstat_named_t zil_itx_metaslab_normal_count;
kstat_named_t zil_itx_metaslab_normal_bytes;
kstat_named_t zil_itx_metaslab_normal_write;
kstat_named_t zil_itx_metaslab_normal_alloc;
/*
* Transactions which have been allocated to the "slog" storage pool.
* If there are no separate log devices, this is the same as the
* "normal" pool.
* "normal" pool. bytes <= write <= alloc.
*/
kstat_named_t zil_itx_metaslab_slog_count;
kstat_named_t zil_itx_metaslab_slog_bytes;
kstat_named_t zil_itx_metaslab_slog_write;
kstat_named_t zil_itx_metaslab_slog_alloc;
} zil_kstat_values_t;
typedef struct zil_sums {
@@ -515,8 +519,12 @@ typedef struct zil_sums {
wmsum_t zil_itx_needcopy_bytes;
wmsum_t zil_itx_metaslab_normal_count;
wmsum_t zil_itx_metaslab_normal_bytes;
wmsum_t zil_itx_metaslab_normal_write;
wmsum_t zil_itx_metaslab_normal_alloc;
wmsum_t zil_itx_metaslab_slog_count;
wmsum_t zil_itx_metaslab_slog_bytes;
wmsum_t zil_itx_metaslab_slog_write;
wmsum_t zil_itx_metaslab_slog_alloc;
} zil_sums_t;
#define ZIL_STAT_INCR(zil, stat, val) \