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Bug 903889 - The value of steal time in "top" command always is "0.0% st" after guest migration
Summary: The value of steal time in "top" command always is "0.0% st" after guest migr...
Keywords:
Status: CLOSED CURRENTRELEASE
Alias: None
Product: Red Hat Enterprise Linux 7
Classification: Red Hat
Component: qemu-kvm
Version: 7.0
Hardware: x86_64
OS: Linux
high
medium
Target Milestone: rc
: ---
Assignee: Marcelo Tosatti
QA Contact: Virtualization Bugs
URL:
Whiteboard:
Depends On: 903123
Blocks:
TreeView+ depends on / blocked
 
Reported: 2013-01-25 01:37 UTC by huiqingding
Modified: 2014-06-18 03:21 UTC (History)
10 users (show)

Fixed In Version: qemu-kvm-1.5.3-7.el7
Doc Type: Bug Fix
Doc Text:
Clone Of: 903123
Environment:
Last Closed: 2014-06-13 10:11:03 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)
The result of top command of the source first guest. (15.18 KB, image/png)
2013-01-25 01:41 UTC, huiqingding 		no flags Details
The result of top command in the second source guest. (15.11 KB, image/png)
2013-01-25 01:43 UTC, huiqingding 		no flags Details
After migration, the result of top command in the first guest. (15.37 KB, image/png)
2013-01-25 01:43 UTC, huiqingding 		no flags Details
After migration, the result of top command in the second guest. (15.25 KB, image/png)
2013-01-25 01:44 UTC, huiqingding 		no flags Details
View All

Comment 1 huiqingding 2013-01-25 01:41:14 UTC 
Created attachment 687121 [details]
The result of top command of the source first guest.
Comment 2 huiqingding 2013-01-25 01:43:02 UTC 
Created attachment 687122 [details]
The result of top command in the second source guest.
Comment 3 huiqingding 2013-01-25 01:43:38 UTC 
Created attachment 687123 [details]
After migration, the result of top command in the first guest.
Comment 5 huiqingding 2013-01-25 01:44:10 UTC 
Created attachment 687124 [details]
After migration, the result of top command in the second guest.
Comment 6 Jaromír Cápík 2013-08-27 16:02:40 UTC 
Hello Huiqing & Orion.

Why is this reported against procps-ng? It's very likely a matter of the kernel or qemu-kvm. 'top' only translates values reported by the kernel in a well readable form.
As I'm reading the parent bug, the root cause seems to be in the qemu-kvm component. Switching ...

Regards,
Jaromir.
Comment 7 Miroslav Rezanina 2013-09-26 09:35:31 UTC 
Fix included in qemu-kvm-1.5.3-7.el7
Comment 9 Jun Li 2013-11-04 10:09:49 UTC 
Reproduce:
Version:
3.10.0-41.el7.x86_64
qemu-kvm-1.4.0-4.el7.x86_64

Reproduce this bug with the same command line as the comments 0 descript. After migration, the value of steal time in both destination guests are "0.0% st".
-----------

The steps as the comments 0 descript.
Version:
qemu-kvm-1.5.3-11.el7.x86_64
3.10.0-41.el7.x86_64

Before migration:
%Cpu(s):  1.7 us,  0.0 sy,  0.0 ni,  0.0 id,  0.0 wa, 48.3 hi,  0.0 si, 50.0 st
%Cpu(s):  1.7 us,  0.0 sy,  0.0 ni,  0.0 id,  0.0 wa, 48.2 hi,  0.0 si, 50.2 st

After migration:
%Cpu(s):  0.0 us,  0.0 sy,  0.0 ni,  0.0 id,  0.0 wa, 49.8 hi,  0.0 si, 50.2 st
%Cpu(s):  0.0 us,  0.0 sy,  0.0 ni,  0.0 id,  0.0 wa, 50.2 hi,  0.0 si, 49.8 st

After migration, the value of steal time in both destination guests almost do not changed. 

Based on above test results, I think this bug has been verified.
Comment 11 Ludek Smid 2014-06-13 10:11:03 UTC 
This request was resolved in Red Hat Enterprise Linux 7.0.

Contact your manager or support representative in case you have further questions about the request.
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