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Remove pool io kstats (#12212)

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This mostly reverts "3537 want pool io kstats" commit of 8 years ago.

From one side this code using pool-wide locks became pretty bad for
performance, creating significant lock contention in I/O pipeline.
From another, there are more efficient ways now to obtain detailed
statistics, while this statistics is illumos-specific and much less
usable on Linux and FreeBSD, reported only via procfs/sysctls.

This commit does not remove KSTAT_TYPE_IO implementation, that may
be removed later together with already unused KSTAT_TYPE_INTR and
KSTAT_TYPE_TIMER.

Reviewed-by: Matthew Ahrens <mahrens@delphix.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Alexander Motin <mav@FreeBSD.org>
Sponsored-By: iXsystems, Inc.
Closes #12212
This commit is contained in:
Alexander Motin
2021-06-10 11:27:33 -04:00
committed by GitHub
parent 860051f1d1
commit 371f88d96f
10 changed files with 0 additions and 276 deletions
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include/os/freebsd/spl/sys/kstat.h
-4
View File
@@ -210,10 +210,6 @@ extern kstat_t *__kstat_create(const char *ks_module, int ks_instance,
extern void __kstat_install(kstat_t *ksp);
extern void __kstat_delete(kstat_t *ksp);
extern void kstat_waitq_enter(kstat_io_t *);
extern void kstat_waitq_exit(kstat_io_t *);
extern void kstat_runq_enter(kstat_io_t *);
extern void kstat_runq_exit(kstat_io_t *);
#define kstat_set_seq_raw_ops(k, h, d, a) \
__kstat_set_seq_raw_ops(k, h, d, a)