diff options
| author | Daniel Wagner <dwagner@suse.de> | 2023-12-18 17:59:54 +0100 |
|---|---|---|
| committer | Keith Busch <kbusch@kernel.org> | 2023-12-19 09:10:13 -0800 |
| commit | 963929615194d163a25e3b536cd990a05d7e9439 (patch) | |
| tree | 97b72d232cfed6fe1cf47b239257a869d3f20a4c /drivers | |
| parent | a1a825ab6a60380240ca136596732fdb80bad87a (diff) | |
| download | linux-963929615194d163a25e3b536cd990a05d7e9439.tar.gz linux-963929615194d163a25e3b536cd990a05d7e9439.tar.bz2 linux-963929615194d163a25e3b536cd990a05d7e9439.zip | |
nvme: repack struct nvme_ns_head
ns_id, lba_shift and ms are always accessed for every read/write I/O in
nvme_setup_rw. By grouping these variables into one cacheline we can
safe some cycles.
4k sequential reads:
baseline patched
Bandwidth: 1620 1634
IOPs 66345579 66910939
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Daniel Wagner <dwagner@suse.de>
Signed-off-by: Keith Busch <kbusch@kernel.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/nvme/host/nvme.h | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h index 6211f18c53c7..3dbd187896d8 100644 --- a/drivers/nvme/host/nvme.h +++ b/drivers/nvme/host/nvme.h @@ -440,21 +440,21 @@ struct nvme_ns_head { struct list_head list; struct srcu_struct srcu; struct nvme_subsystem *subsys; - unsigned ns_id; struct nvme_ns_ids ids; struct list_head entry; struct kref ref; bool shared; int instance; struct nvme_effects_log *effects; + u64 nuse; + unsigned ns_id; int lba_shift; u16 ms; u16 pi_size; - u16 sgs; - u32 sws; - u64 nuse; u8 pi_type; u8 guard_type; + u16 sgs; + u32 sws; #ifdef CONFIG_BLK_DEV_ZONED u64 zsze; #endif |