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| author | Don Brace <don.brace@microchip.com> | 2021-03-11 23:15:56 +0300 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2021-04-06 06:02:30 +0300 |
| commit | c7ffedb3a774a835450a518566639254534e72c4 (patch) | |
| tree | 0da64b6f5d7347725eca9058787159ae01fb286c /tools/perf/scripts/python/exported-sql-viewer.py | |
| parent | 583891c9e509256a2b2902607c2e7a7c36beb0d3 (diff) | |
| download | linux-c7ffedb3a774a835450a518566639254534e72c4.tar.xz | |
scsi: smartpqi: Add stream detection
Enhance performance by adding sequential stream detection for RAID5/RAID6
sequential write requests. Reduce stripe lock contention with full-stripe
write operations.
There is one common stripe lock for each RAID volume that can be set by
either the RAID engine or the AIO engine. The AIO path has I/O request
sizes well below the stripe size resulting in many Read-Modify-Write
operations.
Sending the request to the RAID engine allows for coalescing requests into
full stripe operations resulting in reduced Read-Modify-Write operations.
Link: https://lore.kernel.org/r/161549375693.25025.2962141451773219796.stgit@brunhilda
Reviewed-by: Scott Benesh <scott.benesh@microchip.com>
Reviewed-by: Mike McGowen <mike.mcgowen@microchip.com>
Reviewed-by: Scott Teel <scott.teel@microchip.com>
Reviewed-by: Kevin Barnett <kevin.barnett@microchip.com>
Signed-off-by: Don Brace <don.brace@microchip.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'tools/perf/scripts/python/exported-sql-viewer.py')
0 files changed, 0 insertions, 0 deletions