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[PATCH] lpfc 8.1.3: Fix performance when using multiple SLI rings

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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>
This commit is contained in:
Jamie Wellnitz
2006-02-28 22:33:08 -05:00
committed by James Bottomley
parent 56178645c2
commit cf5bf97e1d
3 changed files with 50 additions and 3 deletions
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10
drivers/scsi/lpfc/lpfc_attr.c
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@@ -670,6 +670,14 @@ LPFC_ATTR_RW(cr_delay, 0, 0, 63, "A count of milliseconds after which an "
LPFC_ATTR_RW(cr_count, 1, 1, 255, "A count of I/O completions after which an "
"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
@@ -726,6 +734,7 @@ struct class_device_attribute *lpfc_host_attrs[] = {
&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_get_cfgparam(struct lpfc_hba *phba)
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);