aboutsummaryrefslogtreecommitdiffstats
path: root/cmd
diff options
context:
space:
mode:
authorTim Chase <[email protected]>2016-10-10 17:19:14 -0500
committerBrian Behlendorf <[email protected]>2016-10-10 15:19:14 -0700
commitd33931a83a33db4034186dfda6dcdd294ace2c75 (patch)
treeed3f60d617440d0e4012eaffc739c00a81534039 /cmd
parent57f16600b981f38585a956ae674488640424f711 (diff)
Write issue taskq shouldn't be dynamic
This is as much an upstream compatibility as it's a bit of a performance gain. The illumos taskq implemention doesn't allow a TASKQ_THREADS_CPU_PCT type to be dynamic and in fact enforces as much with an ASSERT. As to performance, if this taskq is dynamic, it can cause excessive contention on tq_lock as the threads are created and destroyed because it can see bursts of many thousands of tasks in a short time, particularly in heavy high-concurrency zvol write workloads. Reviewed-by: Brian Behlendorf <[email protected]> Signed-off-by: Tim Chase <[email protected]> Closes #5236
Diffstat (limited to 'cmd')
0 files changed, 0 insertions, 0 deletions