Bug 806235

Summary:	Unmatched the cpu usage from virt-manager to task manager in the guest.
Product:	Red Hat Enterprise Linux 6	Reporter:	dyuan
Component:	virt-manager	Assignee:	virt-mgr-maint
Status:	CLOSED NOTABUG	QA Contact:	Virtualization Bugs <virt-bugs>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	6.3	CC:	dallan, mzhan, rjones, rwu, tzheng, yupzhang
Target Milestone:	rc	Keywords:	Reopened
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:
Clones:	806238 (view as bug list)		Environment:
Last Closed:	2012-09-12 01:35:18 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Bug Depends On:
Bug Blocks:	806238

Description dyuan 2012-03-23 09:42:43 UTC

Description of problem:
In the guest, the cpu usage is 100% from task manager, but it's around 29% from virt-manager.
It's better to return "no respons" when the guest cpu usage reached 100% but not stay at 29%, or it will be confused for users.

Version-Release number of selected component (if applicable):
virt-manager-0.9.0-10.el6.x86_64
virt-top-1.0.4-3.12.el6.x86_64
python-virtinst-0.600.0-7.el6.noarch
libvirt-0.9.10-6.el6

How reproducible:
always

Steps to Reproduce:
1. boot up a guest, xp-i386
2. open the IE browser, or issue other programme to occupy 100% cpu
3. track the cpu usage from task manager
  
Actual results:
unmatched cpu usage from the tools to the guest task manager.

Expected results:
Presents the true state of guest.

Additional info:

Comment 1 Cole Robinson 2012-04-02 21:38:16 UTC

What CPU usage column, Guest CPU or Host CPU? How many VCPUS does the VM have?

Comment 2 Cole Robinson 2012-06-17 22:00:13 UTC

Closing as INSUFFICIENT_DATA

Comment 3 dyuan 2012-08-14 08:20:41 UTC

Sorry for the late responds.

I have 4 physical cpu in host and 1 virtual cpu in guest, make the cpu usage to 100% in guest then get the 25% cpu usage in "performance -- CPU usage" of "show virtual hardware details", I know that it shows the usage per the whole physical cpus in host. 
But I think it should be different in "Connection Details -- Overview", because I get the cpu usage in "show virtual hardware details" against the single vm but not connection.

Comment 4 Dave Allan 2012-09-12 01:35:18 UTC

I believe this is behavior by design, so I'm closing as NOTABUG.