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Porting Notes:
- Most of these fixes were applied in the original 37fb3e43
commit when this change was ported for Linux.
Authored by: Paul Dagnelie <[email protected]>
Reviewed by: Serapheim Dimitropoulos <[email protected]>
Reviewed by: Matt Ahrens <[email protected]>
Reviewed by: Prashanth Sreenivasa <[email protected]>
Reviewed by: Jorgen Lundman <[email protected]>
Reviewed by: Igor Kozhukhov <[email protected]>
Reviewed by: George Melikov <[email protected]>
Approved by: Robert Mustacchi <[email protected]>
Ported-by: Brian Behlendorf <[email protected]>
OpenZFS-issue: https://www.illumos.org/issues/9688
OpenZFS-commit: https://github.com/openzfs/openzfs/commit/29bf2d68be
Closes #8042
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In the new aggsum counters the CPU_SEQID macro should be surrounded by
kpreempt_disable)() and kpreempt_enable() calls to prevent a Linux
kernel BUG warning. The addsum_add() function use the cpuid to
minimize lock contention when selecting a bucket, after selection
the bucket is protected by a mutex and it is safe to reschedule the
process to a different processor at any time.
Reviewed-by: Matthew Thode <[email protected]>
Reviewed-by: Paul Dagnelie <[email protected]>
Signed-off-by: Brian Behlendorf <[email protected]>
Closes #7609
Closes #7610
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In pursuit of improving performance on multi-core systems, we should
implements fanned out counters and use them to improve the performance of
some of the arc statistics. These stats are updated extremely frequently,
and can consume a significant amount of CPU time.
Authored by: Paul Dagnelie <[email protected]>
Reviewed by: Pavel Zakharov <[email protected]>
Reviewed by: Matthew Ahrens <[email protected]>
Approved by: Dan McDonald <[email protected]>
Reviewed-by: Brian Behlendorf <[email protected]>
Ported-by: Paul Dagnelie <[email protected]>
OpenZFS-issue: https://www.illumos.org/issues/8484
OpenZFS-commit: https://github.com/openzfs/openzfs/commit/7028a8b92b7
Issue #3752
Closes #7462
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