diff options
| author | Suganath Prabu S <suganath-prabu.subramani@broadcom.com> | 2019-05-31 08:14:38 -0400 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2019-06-18 19:46:26 -0400 |
| commit | 5dd48a555a40431787e4e780ec6b3a7632250853 (patch) | |
| tree | d17737f148aa3b4dc2cb1aa0c17137d0761dff31 /drivers/scsi/mpt3sas/mpt3sas_base.c | |
| parent | 0213651609b91180d1645388d35d6e77d7e0a886 (diff) | |
scsi: mpt3sas: Use high iops queues under some circumstances
The driver will use round-robin method for io submission in batches within
the high iops queues when the number of in-flight ios on the target device
is larger than 8. Otherwise the driver will use low latency reply queues.
Signed-off-by: Suganath Prabu S <suganath-prabu.subramani@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/mpt3sas/mpt3sas_base.c')
| -rw-r--r-- | drivers/scsi/mpt3sas/mpt3sas_base.c | 36 |
1 files changed, 35 insertions, 1 deletions
diff --git a/drivers/scsi/mpt3sas/mpt3sas_base.c b/drivers/scsi/mpt3sas/mpt3sas_base.c index 57d0e7de1631..74cb060e594f 100644 --- a/drivers/scsi/mpt3sas/mpt3sas_base.c +++ b/drivers/scsi/mpt3sas/mpt3sas_base.c @@ -3323,6 +3323,35 @@ _base_get_msix_index(struct MPT3SAS_ADAPTER *ioc, } /** + * _base_get_high_iops_msix_index - get the msix index of + * high iops queues + * @ioc: per adapter object + * @scmd: scsi_cmnd object + * + * Returns: msix index of high iops reply queues. + * i.e. high iops reply queue on which IO request's + * reply should be posted by the HBA firmware. + */ +static inline u8 +_base_get_high_iops_msix_index(struct MPT3SAS_ADAPTER *ioc, + struct scsi_cmnd *scmd) +{ + /** + * Round robin the IO interrupts among the high iops + * reply queues in terms of batch count 16 when outstanding + * IOs on the target device is >=8. + */ + if (atomic_read(&scmd->device->device_busy) > + MPT3SAS_DEVICE_HIGH_IOPS_DEPTH) + return base_mod64(( + atomic64_add_return(1, &ioc->high_iops_outstanding) / + MPT3SAS_HIGH_IOPS_BATCH_COUNT), + MPT3SAS_HIGH_IOPS_REPLY_QUEUES); + + return _base_get_msix_index(ioc, scmd); +} + +/** * mpt3sas_base_get_smid - obtain a free smid from internal queue * @ioc: per adapter object * @cb_idx: callback index @@ -6707,6 +6736,7 @@ mpt3sas_base_attach(struct MPT3SAS_ADAPTER *ioc) ioc->build_sg_scmd = &_base_build_sg_scmd; ioc->build_sg = &_base_build_sg; ioc->build_zero_len_sge = &_base_build_zero_len_sge; + ioc->get_msix_index_for_smlio = &_base_get_msix_index; break; case MPI25_VERSION: case MPI26_VERSION: @@ -6721,7 +6751,11 @@ mpt3sas_base_attach(struct MPT3SAS_ADAPTER *ioc) ioc->build_nvme_prp = &_base_build_nvme_prp; ioc->build_zero_len_sge = &_base_build_zero_len_sge_ieee; ioc->sge_size_ieee = sizeof(Mpi2IeeeSgeSimple64_t); - + if (ioc->high_iops_queues) + ioc->get_msix_index_for_smlio = + &_base_get_high_iops_msix_index; + else + ioc->get_msix_index_for_smlio = &_base_get_msix_index; break; } if (ioc->atomic_desc_capable) { |