diff options
| author | Sam Bradshaw <sbradshaw@micron.com> | 2014-06-06 13:28:48 -0600 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2014-06-06 13:28:48 -0600 |
| commit | f45c40a92d2c6915a0e88ff8a947095be2ba1c8e (patch) | |
| tree | 20ca1854aefee878ca5606b98cfdfe920f511b47 /drivers/block/mtip32xx/mtip32xx.h | |
| parent | f6be4fb4bcb396fc3b1c134b7863351972de081f (diff) | |
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>
Diffstat (limited to 'drivers/block/mtip32xx/mtip32xx.h')
| -rw-r--r-- | drivers/block/mtip32xx/mtip32xx.h | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/block/mtip32xx/mtip32xx.h b/drivers/block/mtip32xx/mtip32xx.h index 4b9b554234bc..ba1b31ee22ec 100644 --- a/drivers/block/mtip32xx/mtip32xx.h +++ b/drivers/block/mtip32xx/mtip32xx.h @@ -493,19 +493,19 @@ struct driver_data { struct workqueue_struct *isr_workq; - struct mtip_work work[MTIP_MAX_SLOT_GROUPS]; - atomic_t irq_workers_active; + struct mtip_work work[MTIP_MAX_SLOT_GROUPS]; + int isr_binding; struct block_device *bdev; - int unal_qdepth; /* qdepth of unaligned IO queue */ - struct list_head online_list; /* linkage for online list */ struct list_head remove_list; /* linkage for removing list */ + + int unal_qdepth; /* qdepth of unaligned IO queue */ }; #endif |