linux/drivers/block/mtip32xx
Sam Bradshaw f45c40a92d mtip32xx: minor performance enhancements
This patch adds the following:

1) Compiler hinting in the fast path.
2) A prefetch of port->flags to eliminate moderate cpu stalling later
in mtip_hw_submit_io().
3) Eliminate a redundant rq_data_dir().
4) Reorder members of driver_data to eliminate false cacheline sharing
between irq_workers_active and unal_qdepth.

With some workload and topology configurations, I'm seeing ~1.5%
throughput improvement in small block random read benchmarks as well
as improved latency std. dev.

Signed-off-by: Sam Bradshaw <sbradshaw@micron.com>

Add include of <linux/prefetch.h>

Signed-off-by: Jens Axboe <axboe@fb.com>
2014-06-06 13:28:48 -06:00
..
Kconfig Remove GENERIC_HARDIRQ config option 2013-09-13 15:09:52 +02:00
Makefile block: Add driver for Micron RealSSD pcie flash cards 2011-11-05 08:35:10 +01:00
mtip32xx.c mtip32xx: minor performance enhancements 2014-06-06 13:28:48 -06:00
mtip32xx.h mtip32xx: minor performance enhancements 2014-06-06 13:28:48 -06:00