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| author | James Smart <jsmart2021@gmail.com> | 2017-06-02 06:07:10 +0200 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2017-06-13 03:37:31 +0200 |
| commit | 0cf07f84dd32639394084b9d6794424587a38789 (patch) | |
| tree | 7a87d71176fb3576d93c3b5cb34f557f55c04c50 /drivers/scsi/lpfc/lpfc_sli.h | |
| parent | scsi: lpfc: Fix defects reported by Coverity Scan (diff) | |
| download | linux-0cf07f84dd32639394084b9d6794424587a38789.tar.xz linux-0cf07f84dd32639394084b9d6794424587a38789.zip | |
scsi: lpfc: Add auto EQ delay logic
Administrator intervention is currently required to get good numbers
when switching from running latency tests to IOPS tests.
The configured interrupt coalescing values will greatly effect the
results of these tests. Currently, the driver has a single coalescing
value set by values of the module attribute. This patch changes the
driver to support auto-configuration of the coalescing value based on
the total number of outstanding IOs and average number of CQEs processed
per interrupt for an EQ. Values are checked every 5 seconds.
The driver defaults to the automatic selection. Automatic selection can
be disabled by the new lpfc_auto_imax module_parameter.
Older hardware can only change interrupt coalescing by mailbox
command. Newer hardware supports change via a register. The patch
support both.
Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <james.smart@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/lpfc/lpfc_sli.h')
| -rw-r--r-- | drivers/scsi/lpfc/lpfc_sli.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/scsi/lpfc/lpfc_sli.h b/drivers/scsi/lpfc/lpfc_sli.h index 9085306ddd78..a3b1b5145d2b 100644 --- a/drivers/scsi/lpfc/lpfc_sli.h +++ b/drivers/scsi/lpfc/lpfc_sli.h @@ -321,6 +321,7 @@ struct lpfc_sli { #define LPFC_MENLO_MAINT 0x1000 /* need for menl fw download */ #define LPFC_SLI_ASYNC_MBX_BLK 0x2000 /* Async mailbox is blocked */ #define LPFC_SLI_SUPPRESS_RSP 0x4000 /* Suppress RSP feature is supported */ +#define LPFC_SLI_USE_EQDR 0x8000 /* EQ Delay Register is supported */ struct lpfc_sli_ring *sli3_ring; |