summaryrefslogtreecommitdiffstats
path: root/zfs.release.in
diff options
context:
space:
mode:
authorAlexander Motin <[email protected]>2014-07-18 08:53:38 -0800
committerBrian Behlendorf <[email protected]>2015-07-06 09:34:13 -0700
commite16b3fcc610fab2dcf3381486b2640dc2a2213cb (patch)
tree8571cd7ae1db3137b7f36ae93ff07f447a16fecc /zfs.release.in
parent4bda3bd0e72d582a785b6552ce16b99e04414fbe (diff)
Illumos 5008 - lock contention (rrw_exit) while running a read only load
5008 lock contention (rrw_exit) while running a read only load Reviewed by: Matthew Ahrens <[email protected]> Reviewed by: George Wilson <[email protected]> Reviewed by: Alex Reece <[email protected]> Reviewed by: Christopher Siden <[email protected]> Reviewed by: Richard Yao <[email protected]> Reviewed by: Saso Kiselkov <[email protected]> Approved by: Garrett D'Amore <[email protected]> Porting notes: This patch ported perfectly cleanly to ZoL. During testing 100% cached small-block reads, extreme contention was noticed on rrl->rr_lock from rrw_exit() due to the frequent entering and leaving ZPL. Illumos picked up this patch from FreeBSD and it also helps under Linux. On a 1-minute 4K cached read test with 10 fio processes pinned to a single socket on a 4-socket (10 thread per socket) NUMA system, contentions on rrl->rr_lock were reduced from 508799 to 43085. Ported-by: Tim Chase <[email protected]> Signed-off-by: Brian Behlendorf <[email protected]> Closes #3555
Diffstat (limited to 'zfs.release.in')
0 files changed, 0 insertions, 0 deletions