Commits on Mar 2, 2024

1. BRT: Change brt_pending_tree sorting order …

   It does not look important how exactly brt_pending_tree is sorted.
   When cloning large file, it is quite likely that all of its blocks
   have identical physical birth times, so comparing them first does
   not provide useful entropy, while accesses additional cache line.
   In most cases combination of vdev and offset provides unique result
   and physical birth time comparison is not even needed.  Meanwhile,
   when traversing the tree inside brt_pending_apply(), it can be
   beneficial for dbuf cache and CPU cache hits to group processing
   by vdev and so by the per-VDEV BRT ZAPs.
   
   Signed-off-by:	Alexander Motin <mav@FreeBSD.org>
   Sponsored by:	iXsystems, Inc.

   

   amotin committed Mar 2, 2024
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