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57b4098562
In my understanding ARC_BUF_SHARED() and arc_buf_is_shared() should return identical results, except the second also asserts it deeper. The first is much cheaper though, saving few pointer dereferences. Replace production arc_buf_is_shared() calls with ARC_BUF_SHARED(), and call arc_buf_is_shared() in random assertions, while making it even more strict. On my tests this in half reduces arc_buf_destroy_impl() time, that noticeably reduces hash_lock congestion under heavy dbuf eviction. Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Reviewed-by: George Wilson <george.wilson@delphix.com> Signed-off-by: Alexander Motin <mav@FreeBSD.org> Sponsored by: iXsystems, Inc. Closes #15397 |
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