如何查看当前队列深度值？

Question

我有一个通过光纤连接到 NetApp SAN 的 OEL 服务器。如何查看操作系统看到的队列深度？

输出 lspci：

05:00.0 Fibre Channel: QLogic Corp. ISP2532-based 8Gb Fibre Channel to PCI Express HBA (rev 02)
05:00.1 Fibre Channel: QLogic Corp. ISP2532-based 8Gb Fibre Channel to PCI Express HBA (rev 02)
08:00.0 Fibre Channel: QLogic Corp. ISP2532-based 8Gb Fibre Channel to PCI Express HBA (rev 02)
08:00.1 Fibre Channel: QLogic Corp. ISP2532-based 8Gb Fibre Channel to PCI Express HBA (rev 02)

输出lsmod：

qla2xxx              1262209  352
scsi_transport_fc      83145  1 qla2xxx
scsi_mod              199641  15 be2iscsi,ib_iser,iscsi_tcp,bnx2i,libcxgbi,libiscsi2,scsi_transport_iscsi2,scsi_dh,sr_mod,sg,qla2xxx,scsi_transport_fc,libata,cciss,sd_mod

ls /sys/class/fc_host/host*

/sys/class/fc_host/host3:
device       issue_lip  port_id    port_state  speed       subsystem          supported_speeds  system_hostname  uevent
fabric_name  node_name  port_name  port_type   statistics  supported_classes  symbolic_name     tgtid_bind_type

/sys/class/fc_host/host4:
device       issue_lip  port_id    port_state  speed       subsystem          supported_speeds  system_hostname  uevent
fabric_name  node_name  port_name  port_type   statistics  supported_classes  symbolic_name     tgtid_bind_type

/sys/class/fc_host/host5:
device       issue_lip  port_id    port_state  speed       subsystem          supported_speeds  system_hostname  uevent
fabric_name  node_name  port_name  port_type   statistics  supported_classes  symbolic_name     tgtid_bind_type

/sys/class/fc_host/host6:
device       issue_lip  port_id    port_state  speed       subsystem          supported_speeds  system_hostname  uevent
fabric_name  node_name  port_name  port_type   statistics  supported_classes  symbolic_name     tgtid_bind_type

Answer 1

最简单的方法是

cat /sys/block/<sdX>/device/queue_depth