Shaohua Li e26b53d0b2 percpu_ida: make percpu_ida percpu size/batch configurable
Make percpu_ida percpu size/batch configurable. The block-mq-tag will
use it.

After block-mq uses percpu_ida to manage tags, performance is improved.
My test is done in a 2 sockets machine, 12 process cross the 2 sockets.
So if there is lock contention or ipi, should be stressed heavily.
Testing is done for null-blk.

hw_queue_depth	nopatch iops	patch iops
64		~800k/s		~1470k/s
2048		~4470k/s	~4340k/s

Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Shaohua Li <shli@fusionio.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2013-10-25 11:55:59 +01:00
..
2013-07-19 13:54:23 -07:00
2013-09-10 13:03:41 -07:00
2013-03-13 15:21:48 -07:00
2011-03-11 14:25:50 +00:00
2008-06-06 11:29:10 -07:00
2013-07-09 10:33:30 -07:00
2011-10-29 21:20:22 +02:00
2011-03-31 11:26:23 -03:00
2013-02-27 19:10:09 -08:00
2012-10-06 03:04:57 +09:00
2012-10-09 16:22:40 +09:00
2013-06-18 13:48:45 +02:00
2012-12-17 17:15:22 -08:00
2012-07-30 17:25:16 -07:00
2012-01-31 23:19:47 +02:00
2011-12-08 19:52:43 -05:00
2013-04-29 18:28:42 -07:00