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Date: Fri, 21 Jun 2013 23:37:40 GMT
From: lt <ltpig402a@live.com>
To: freebsd-gnats-submit@FreeBSD.org
Subject: System (9.1-p4) hangs on heavy ixgbe network traffic with hw.ixgbe.num_queues=6
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>Number:         179824
>Category:       kern
>Synopsis:       [ixgbe] System (9.1-p4) hangs on heavy ixgbe network traffic with hw.ixgbe.num_queues=6
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-net
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:  
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Fri Jun 21 23:40:00 UTC 2013
>Closed-Date:    
>Last-Modified:  Sun Jun 23 06:22:20 UTC 2013
>Originator:     lt
>Release:        9.1-RELEASE-p4
>Organization:
>Environment:
FreeBSD cache01 9.1-RELEASE-p4 FreeBSD 9.1-RELEASE-p4 #0: Mon Jun 17 11:42:37 UTC 2013     root@amd64-builder.daemonology.net:/usr/obj/usr/src/sys/GENERIC  amd64

>Description:
A 6-CPU core 9.1-RELEASE-p4 system equipped with intel 82599EB NIC with hw.ixgbe.num_queues=6 hangs when traffic volume is heavy.

The system hang can be workarounded by setting hw.ixgbe.num-queues=4


>How-To-Repeat:
HW/SW setup - 9.1-RELEASE-p4 with the 82599EB NIC on a 6-CPU core system

Using a nginx webserver and use clients like http_load to stress the 10G network interface. System will hang within 30 seconds.

Hard reboot is required.

>Fix:
change hw.ixgbe.num_queues=4 (or 2) in /boot/loader.conf

>Release-Note:
>Audit-Trail:
Responsible-Changed-From-To: freebsd-bugs->freebsd-net 
Responsible-Changed-By: linimon 
Responsible-Changed-When: Sun Jun 23 06:22:04 UTC 2013 
Responsible-Changed-Why:  
Over to maintainer(s). 

http://www.freebsd.org/cgi/query-pr.cgi?pr=179824 
>Unformatted:
