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| author | Shaohua Li <shli@kernel.org> | 2013-10-15 03:05:01 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2013-10-25 12:55:59 +0200 |
| commit | e26b53d0b287056646a0dffce8bc6b0f053f3823 (patch) | |
| tree | 99f7f824f8123d441de534960fd85dda5d2e5385 /lib/kstrtox.h | |
| parent | percpu_counter: make APIs irq safe (diff) | |
| download | linux-e26b53d0b287056646a0dffce8bc6b0f053f3823.tar.xz linux-e26b53d0b287056646a0dffce8bc6b0f053f3823.zip | |
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>
Diffstat (limited to 'lib/kstrtox.h')
0 files changed, 0 insertions, 0 deletions