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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 GitHub
parent f3678d70ff
commit 6bc61d22c4
5 changed files with 22 additions and 15 deletions
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module/zfs/arc.c
+2 -2
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@@ -7950,9 +7950,9 @@ arc_init(void)
}
arc_evict_zthr = zthr_create("arc_evict",
arc_evict_cb_check, arc_evict_cb, NULL);
arc_evict_cb_check, arc_evict_cb, NULL, defclsyspri);
arc_reap_zthr = zthr_create_timer("arc_reap",
arc_reap_cb_check, arc_reap_cb, NULL, SEC2NSEC(1));
arc_reap_cb_check, arc_reap_cb, NULL, SEC2NSEC(1), minclsyspri);
arc_warm = B_FALSE;