Ned Bass 3c6ed5410b Taskq locking optimizations ... Testing has shown that tq->tq_lock can be highly contended when a large number of small work items are dispatched. The lock hold time is reduced by the following changes: 1) Use exclusive threads in the work_waitq When a single work item is dispatched we only need to wake a single thread to service it. The current implementation uses non-exclusive threads so all threads are woken when the dispatcher calls wake_up(). If a large number of threads are in the queue this overhead can become non-negligible. 2) Conditionally add/remove threads from work waitq Taskq threads need only add themselves to the work wait queue if there are no pending work items. Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Issue #32		2012-01-19 14:42:49 -08:00
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spl	Taskq locking optimizations	2012-01-19 14:42:49 -08:00
splat	Add taskq contention splat test	2012-01-18 10:36:51 -08:00
.gitignore	sun-misc-gitignore	2010-01-08 09:37:54 -08:00
Makefile.in	Fix make distclean for --with-config=user	2012-01-17 10:06:00 -08:00