[PATCH] lpfc 8.1.3: Fix performance when using multiple SLI rings
Fix performance when using multiple SLI rings
Currently the driver allocates all of its SLI command and response ring
entries to one primary ring. Other rings get little, or no, resources.
Allow more resources to be given to ring 1
Signed-off-by: Jamie Wellnitz <Jamie.Wellnitz@emulex.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
diff --git a/drivers/scsi/lpfc/lpfc.h b/drivers/scsi/lpfc/lpfc.h
index c4cca91..2f67a8a 100644
--- a/drivers/scsi/lpfc/lpfc.h
+++ b/drivers/scsi/lpfc/lpfc.h
@@ -293,6 +293,7 @@
uint32_t cfg_link_speed;
uint32_t cfg_cr_delay;
uint32_t cfg_cr_count;
+ uint32_t cfg_multi_ring_support;
uint32_t cfg_fdmi_on;
uint32_t cfg_discovery_threads;
uint32_t cfg_max_luns;
diff --git a/drivers/scsi/lpfc/lpfc_attr.c b/drivers/scsi/lpfc/lpfc_attr.c
index ab49379..2558156 100644
--- a/drivers/scsi/lpfc/lpfc_attr.c
+++ b/drivers/scsi/lpfc/lpfc_attr.c
@@ -671,6 +671,14 @@
"interrupt response is generated");
/*
+# lpfc_multi_ring_support: Determines how many rings to spread available
+# cmd/rsp IOCB entries across.
+# Value range is [1,2]. Default value is 1.
+*/
+LPFC_ATTR_R(multi_ring_support, 1, 1, 2, "Determines number of primary "
+ "SLI rings to spread IOCB entries across");
+
+/*
# lpfc_fdmi_on: controls FDMI support.
# 0 = no FDMI support
# 1 = support FDMI without attribute of hostname
@@ -726,6 +734,7 @@
&class_device_attr_lpfc_link_speed,
&class_device_attr_lpfc_cr_delay,
&class_device_attr_lpfc_cr_count,
+ &class_device_attr_lpfc_multi_ring_support,
&class_device_attr_lpfc_fdmi_on,
&class_device_attr_lpfc_max_luns,
&class_device_attr_nport_evt_cnt,
@@ -1440,6 +1449,7 @@
lpfc_log_verbose_init(phba, lpfc_log_verbose);
lpfc_cr_delay_init(phba, lpfc_cr_delay);
lpfc_cr_count_init(phba, lpfc_cr_count);
+ lpfc_multi_ring_support_init(phba, lpfc_multi_ring_support);
lpfc_lun_queue_depth_init(phba, lpfc_lun_queue_depth);
lpfc_fcp_class_init(phba, lpfc_fcp_class);
lpfc_use_adisc_init(phba, lpfc_use_adisc);
diff --git a/drivers/scsi/lpfc/lpfc_sli.c b/drivers/scsi/lpfc/lpfc_sli.c
index d6ffe26..d08fd89 100644
--- a/drivers/scsi/lpfc/lpfc_sli.c
+++ b/drivers/scsi/lpfc/lpfc_sli.c
@@ -766,7 +766,9 @@
}
/* unSolicited Responses */
if (pring->prt[0].profile) {
- (pring->prt[0].lpfc_sli_rcv_unsol_event) (phba, pring, saveq);
+ if (pring->prt[0].lpfc_sli_rcv_unsol_event)
+ (pring->prt[0].lpfc_sli_rcv_unsol_event) (phba, pring,
+ saveq);
match = 1;
} else {
/* We must search, based on rctl / type
@@ -777,8 +779,9 @@
Rctl)
&& (pring->prt[i].
type == Type)) {
- (pring->prt[i].lpfc_sli_rcv_unsol_event)
- (phba, pring, saveq);
+ if (pring->prt[i].lpfc_sli_rcv_unsol_event)
+ (pring->prt[i].lpfc_sli_rcv_unsol_event)
+ (phba, pring, saveq);
match = 1;
break;
}
@@ -2377,6 +2380,37 @@
return IOCB_BUSY;
}
+static int
+lpfc_extra_ring_setup( struct lpfc_hba *phba)
+{
+ struct lpfc_sli *psli;
+ struct lpfc_sli_ring *pring;
+
+ psli = &phba->sli;
+
+ /* Adjust cmd/rsp ring iocb entries more evenly */
+ pring = &psli->ring[psli->fcp_ring];
+ pring->numCiocb -= SLI2_IOCB_CMD_R1XTRA_ENTRIES;
+ pring->numRiocb -= SLI2_IOCB_RSP_R1XTRA_ENTRIES;
+ pring->numCiocb -= SLI2_IOCB_CMD_R3XTRA_ENTRIES;
+ pring->numRiocb -= SLI2_IOCB_RSP_R3XTRA_ENTRIES;
+
+ pring = &psli->ring[1];
+ pring->numCiocb += SLI2_IOCB_CMD_R1XTRA_ENTRIES;
+ pring->numRiocb += SLI2_IOCB_RSP_R1XTRA_ENTRIES;
+ pring->numCiocb += SLI2_IOCB_CMD_R3XTRA_ENTRIES;
+ pring->numRiocb += SLI2_IOCB_RSP_R3XTRA_ENTRIES;
+
+ /* Setup default profile for this ring */
+ pring->iotag_max = 4096;
+ pring->num_mask = 1;
+ pring->prt[0].profile = 0; /* Mask 0 */
+ pring->prt[0].rctl = FC_UNSOL_DATA;
+ pring->prt[0].type = 5;
+ pring->prt[0].lpfc_sli_rcv_unsol_event = NULL;
+ return 0;
+}
+
int
lpfc_sli_setup(struct lpfc_hba *phba)
{
@@ -2460,6 +2494,8 @@
"SLI2 SLIM Data: x%x x%x\n",
phba->brd_no, totiocb, MAX_SLI2_IOCB);
}
+ if (phba->cfg_multi_ring_support == 2)
+ lpfc_extra_ring_setup(phba);
return 0;
}