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Bug 642424

Summary: [RFE] Support performance statistics in /sys/class/fc_host/host?/statistics for QLogic FibreChannel HBAs
Product: Red Hat Enterprise Linux 6 Reporter: Chris Williams <cww>
Component: kernelAssignee: Red Hat Kernel Manager <kernel-mgr>
Status: CLOSED CANTFIX QA Contact: Red Hat Kernel QE team <kernel-qe>
Severity: medium Docs Contact:
Priority: low    
Version: 6.1CC: jentrena, mgoodwin, syeghiay
Target Milestone: rcKeywords: FutureFeature, Triaged
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: Enhancement
Doc Text:
Story Points: ---
Clone Of: 642422 Environment:
Last Closed: 2011-03-18 12:35:57 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On: 642422    
Bug Blocks: 662543    

Comment 5 Julio Entrena Perez 2011-02-17 17:02:52 UTC
The kernel module for the QLogic FibreChannel HBAs does not provide the
performance statistics announced at /sys/class/fc_host/host?/statistics:

[root statistics]# pwd
/sys/class/fc_host/host5/statistics
[root statistics]# for i in `ls`
> do
> echo -n "$i: "
> cat $i
> done
dumped_frames: 0xffffffffffffffff
error_frames: 0xffffffffffffffff
fcp_control_requests: 0xffffffffffffffff
fcp_input_megabytes: 0x613
fcp_input_requests: 0xffffffffffffffff
fcp_output_megabytes: 0x36a
fcp_output_requests: 0xffffffffffffffff
invalid_crc_count: 0x0
invalid_tx_word_count: 0xb
link_failure_count: 0x0
lip_count: 0xffffffffffffffff
loss_of_signal_count: 0x1
loss_of_sync_count: 0x1
nos_count: 0xffffffffffffffff
prim_seq_protocol_err_count: 0x0
reset_statistics: cat: reset_statistics: Permission denied
rx_frames: 0xffffffffffffffff
rx_words: 0xffffffffffffffff
seconds_since_last_reset: 0xffffffffffffffff
tx_frames: 0xffffffffffffffff
tx_words: 0xffffffffffffffff

Most values have -1 values. Furthermore, the QLogic SANSurfer CLI is not able
to display HBA statistics from the Red Hat provided driver: 

[root statistics]# scli -gs 0
This feature is not supported with current driver!

The driver should provide this information and/or should support the QLogic
SANSurfer CLI utility.

Currently the QLogic driver provided by Red Hat does not provide this
information. The QLogic driver provided by QLogic does.


Files in /sys/class/fc_host/host?/statistics should show the proper statistics
information for each HBA. Also, if possible, the QLogic SANSurfer utility should be able to grab this information from the driver too.

Comment 7 Julio Entrena Perez 2011-03-18 12:35:57 UTC
According to Bug #642422, we can't really export more fc host statistics as we already export what is available from our firmware. Closing.