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Bug 1744962

Summary:	Provide the option to configure probe interval for openflow connection
Product:	Red Hat Enterprise Linux Fast Datapath	Reporter:	Numan Siddique <nusiddiq>
Component:	ovn2.11	Assignee:	Numan Siddique <nusiddiq>
Status:	CLOSED ERRATA	QA Contact:	haidong li <haili>
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	FDP 19.F	CC:	ctrautma, fleitner, jishi, kfida, qding
Target Milestone:	---
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:
Clones:	1744964 1746196 (view as bug list)		Environment:
Last Closed:	2019-10-01 07:21:33 UTC	Type:	Bug
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:
Bug Blocks:	1744964, 1745481, 1745482, 1746196, 1753876

Description Numan Siddique 2019-08-23 11:30:54 UTC

Description of problem:

ovn-controller sends an echo message to the openflow connection every 5 seconds and this is hardcoded. If ovn-controller takes >5 seconds to process logical flows, this results in 100% cpu usage all the time.

So we should provide the option to increase this probe interval.



Version-Release number of selected component (if applicable):


How reproducible:


Steps to Reproduce:
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Actual results:


Expected results:


Additional info:

Comment 2 haidong li 2019-08-28 02:02:15 UTC

Hi Numan,
   Can you please help describe how to config the option?So I can add the case to environment.
And to reproduce this issue,is it the right way that create a lot of logical ports? Thanks!

Comment 3 haidong li 2019-09-04 02:31:58 UTC

Verified on the latest version:
[root@dell-per740-04 ~]# uname -a
Linux dell-per740-04.rhts.eng.pek2.redhat.com 3.10.0-1062.el7.x86_64 #1 SMP Thu Jul 18 20:25:13 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux
[root@dell-per740-04 ~]# rpm -qa | grep openvswitch
openvswitch2.11-2.11.0-21.el7fdp.x86_64
openvswitch-selinux-extra-policy-1.0-13.el7fdp.noarch
kernel-kernel-networking-openvswitch-ovn_ha-1.0-41.noarch
[root@dell-per740-04 ~]# rpm -qa | grep ovn
ovn2.11-2.11.0-36.el7fdp.x86_64
ovn2.11-host-2.11.0-36.el7fdp.x86_64
ovn2.11-central-2.11.0-36.el7fdp.x86_64
[root@dell-per740-04 ~]# 
[root@dell-per740-04 ~]# ovs-vsctl get open . external_ids:ovn-openflow-probe-interval
"5"
[root@dell-per740-04 ~]# top

top - 22:11:36 up 5 days, 59 min,  2 users,  load average: 2.04, 2.48, 2.67
Tasks: 566 total,   3 running, 563 sleeping,   0 stopped,   0 zombie
%Cpu(s):  3.9 us,  1.5 sy,  0.0 ni, 94.6 id,  0.0 wa,  0.0 hi,  0.0 si,  0.0 st
KiB Mem : 65213648 total, 31088348 free,  7404080 used, 26721220 buff/cache
KiB Swap: 32767996 total, 32767996 free,        0 used. 54395516 avail Mem 

   PID USER      PR  NI    VIRT    RES    SHR S  %CPU %MEM     TIME+ COMMAND                                              
169046 openvsw+  10 -10 4252852   1.6g  17936 R 99.2  2.6  61169:54 ovs-vswitchd                                         
169120 root      10 -10 1534852   1.2g   1752 R  90.7  1.9   6289:55 ovn-controller                                       
     9 root      20   0       0      0      0 S   0.7  0.0  27:52.60 rcu_sched                                            
  1114 root      20   0   69412  24844  23728 S   0.7  0.0  80:35.58 systemd-journal                                      
  2080 root      20   0  730380  60424  15752 S   0.7  0.1   4:50.40 rsyslogd                                             
268574 root      20   0  162452   2760   1580 R   0.7  0.0   0:00.07 top                                                  
    37 root      20   0       0      0      0 S   0.3  0.0   1:40.84 kworker/5:0   
            
[root@dell-per740-04 ~]# ovs-vsctl set open . external_ids:ovn-openflow-probe-interval=30
[root@dell-per740-04 ~]# ovs-vsctl get open . external_ids:ovn-openflow-probe-interval
"30"
[root@dell-per740-04 ~]# top

top - 22:27:29 up 5 days,  1:15,  2 users,  load average: 2.29, 2.16, 2.36
Tasks: 566 total,   4 running, 562 sleeping,   0 stopped,   0 zombie
%Cpu(s):  5.1 us,  3.8 sy,  0.0 ni, 91.1 id,  0.0 wa,  0.0 hi,  0.0 si,  0.0 st
KiB Mem : 65213648 total, 31018080 free,  7461380 used, 26734188 buff/cache
KiB Swap: 32767996 total, 32767996 free,        0 used. 54329968 avail Mem 

   PID USER      PR  NI    VIRT    RES    SHR S  %CPU %MEM     TIME+ COMMAND                                              
169046 openvsw+  10 -10 4258772   1.6g  17936 R 99.5  2.6  61202:52 ovs-vswitchd                                         
169120 root      10 -10 1534852   1.2g   1752 R  19.1  1.9   6305:46 ovn-controller                                       
269789 root      20   0  162452   2644   1524 R  11.8  0.0   0:00.03 top                                                  
     1 root      20   0  216728  29880   4228 S   0.0  0.0   0:49.62 systemd                                              
     2 root      20   0       0      0      0 S   0.0  0.0   0:00.15 kthreadd                                             
     4 root       0 -20       0      0      0 S   0.0  0.0   0:00.00 kworker/0:0H                                         
     6 root      20   0       0      0      0 S   0.0  0.0   0:04.98 ksoftirqd/0                                          
     7 root      rt   0       0      0      0 S   0.0  0.0   0:05.06 migration/0

Comment 5 errata-xmlrpc 2019-10-01 07:21:33 UTC

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2019:2943