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| author | James Smart <jsmart2021@gmail.com> | 2019-01-28 11:14:25 -0800 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2019-02-05 22:29:08 -0500 |
| commit | 4c47efc140fa926f00aa59c248458d95bd7b5eab (patch) | |
| tree | 1c78b9c63ed4fc7eab3627e12239d04a8c564144 /drivers/scsi/lpfc/lpfc_debugfs.h | |
| parent | 63df6d637e3358e64b43e7a774939f8f963926cb (diff) | |
| download | lwn-4c47efc140fa926f00aa59c248458d95bd7b5eab.tar.gz lwn-4c47efc140fa926f00aa59c248458d95bd7b5eab.zip | |
scsi: lpfc: Move SCSI and NVME Stats to hardware queue structures
Many io statistics were being sampled and saved using adapter-based data
structures. This was creating a lot of contention and cache thrashing in
the I/O path.
Move the statistics to the hardware queue data structures. Given the
per-queue data structures, use of atomic types is lessened.
Add new sysfs and debugfs stat routines to collate the per hardware queue
values and report at an adapter level.
Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/lpfc/lpfc_debugfs.h')
| -rw-r--r-- | drivers/scsi/lpfc/lpfc_debugfs.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/scsi/lpfc/lpfc_debugfs.h b/drivers/scsi/lpfc/lpfc_debugfs.h index c904fa74dfbc..2360ec8fb848 100644 --- a/drivers/scsi/lpfc/lpfc_debugfs.h +++ b/drivers/scsi/lpfc/lpfc_debugfs.h @@ -50,6 +50,9 @@ #define LPFC_CPUCHECK_SIZE 8192 #define LPFC_NVMEIO_TRC_SIZE 8192 +/* scsistat output buffer size */ +#define LPFC_SCSISTAT_SIZE 8192 + #define LPFC_DEBUG_OUT_LINE_SZ 80 /* |