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Run arc_evict thread at higher priority

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Run arc_evict thread at higher priority, nice=0, to give it more CPU
time which can improve performance for workload with high ARC evict
activities.

On mixed read/write and sequential read workloads, I've seen between
10-40% better performance.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: George Melikov <mail@gmelikov.ru>
Reviewed-by: Alexander Motin <mav@FreeBSD.org>
Signed-off-by: Tony Nguyen <tony.nguyen@delphix.com>
Closes #12397
This commit is contained in:
Tony Nguyen
2021-08-10 11:36:26 -06:00
committed by Tony Hutter
parent 23184b172a
commit 477edd642c
5 changed files with 22 additions and 15 deletions
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include/sys/zthr.h
+3 -2
View File
@@ -25,10 +25,11 @@ typedef void (zthr_func_t)(void *, zthr_t *);
typedef boolean_t (zthr_checkfunc_t)(void *, zthr_t *);
extern zthr_t *zthr_create(const char *zthr_name,
zthr_checkfunc_t checkfunc, zthr_func_t *func, void *arg);
zthr_checkfunc_t checkfunc, zthr_func_t *func, void *arg,
pri_t pri);
extern zthr_t *zthr_create_timer(const char *zthr_name,
zthr_checkfunc_t *checkfunc, zthr_func_t *func, void *arg,
hrtime_t nano_wait);
hrtime_t nano_wait, pri_t pri);
extern void zthr_destroy(zthr_t *t);
extern void zthr_wakeup(zthr_t *t);