diff options
| author | Sumit Saxena <[email protected]> | 2016-01-28 21:04:30 +0530 |
|---|---|---|
| committer | Martin K. Petersen <[email protected]> | 2016-02-23 21:27:02 -0500 |
| commit | 308ec459bc1975d9856cfeb3d1cd6461794a3976 (patch) | |
| tree | 375d7a68f08adf3420da7f0158b033489f239e50 /tools/perf/scripts/python/call-graph-from-postgresql.py | |
| parent | f9a9dee6a1fd8570884a0ab6f19c6b5cca05bd49 (diff) | |
megaraid_sas: Dual queue depth support
1. For iMR controllers, firmware will report two queue depths:
- Controller-wide queue depth
- LDIO queue depth (240)
Controller-wide queue depth will be greater among the two. Using this
new feature, iMR can provide larger Queue depth(QD) for JBOD and limited
QD for Virtual Disk(VD).
2. megaraid_sas driver will throttle read/write LDIOs based on "LDIO
Queue Depth".
3. Dual queue depth can be enabled/disabled via module parameter. It is
enabled by default if the firmware supports it. Only specific firmware
builds will enable the feature.
4. Added sysfs parameter "ldio_outstanding" which permits querying the
number of outstanding LDIO requests at runtime.
Signed-off-by: Sumit Saxena <[email protected]>
Signed-off-by: Kashyap Desai <[email protected]>
Signed-off-by: Martin K. Petersen <[email protected]>
Diffstat (limited to 'tools/perf/scripts/python/call-graph-from-postgresql.py')
0 files changed, 0 insertions, 0 deletions