Bug 981235

Summary:	RFE: Request detail migration statistics output for live migration on RHEL6.5
Product:	Red Hat Enterprise Linux 6	Reporter:	Qunfang Zhang <qzhang>
Component:	qemu-kvm	Assignee:	Orit Wasserman <owasserm>
Status:	CLOSED ERRATA	QA Contact:	Virtualization Bugs <virt-bugs>
Severity:	medium	Docs Contact:
Priority:	high
Version:	6.5	CC:	acathrow, amit.shah, areis, bsarathy, chayang, hhuang, juzhang, michen, minovotn, mkenneth, owasserm, quintela, shu, svenkatr, virt-maint
Target Milestone:	rc	Keywords:	FutureFeature
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:	qemu-kvm-0.12.1.2-2.387.el6	Doc Type:	Enhancement
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2013-11-21 07:01:56 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:

Description Qunfang Zhang 2013-07-04 09:50:09 UTC

Description of problem:
In rhel7, we have wonderful migration statistics output for migration[1], And for RHEL6, the information is not detail. And after migration finish, we could only get the Migration Status (refer to step 3). It's better to the detail information to RHEL6, and it's useful for QE to check the migration status especially the downtime.


[1]
(qemu) info migrate
capabilities: xbzrle: off
Migration status: completed
total time: 129769 milliseconds
downtime: 239 milliseconds
transferred ram: 3932719 kbytes
remaining ram: 0 kbytes
total ram: 4202880 kbytes
duplicate: 73614 pages
normal: 983162 pages
normal bytes: 3932648 kbytes

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


How reproducible:


Steps to Reproduce:
1. Migrate a guest
2. Before migration finish:
(qemu) info migrate 
Migration status: active
transferred ram: 42020 kbytes
remaining ram: 1660192 kbytes
total ram: 2228616 kbytes

3. After migration finished:
(qemu) info migrate 
Migration status: completed

Actual results:
The output information is not detail.

Expected results:
1. Add more detail information to rhel6 like rhel7.
2. After migration finished, should also show the statistics output instead of only "Migration Status".

Additional info:

Comment 1 Qunfang Zhang 2013-07-04 09:57:02 UTC

Version-Release number of selected component (if applicable):
qemu-kvm-0.12.1.2-2.377.el6.x86_64

How reproducible:
Always

Comment 9 Qunfang Zhang 2013-08-22 09:20:27 UTC

Verified this bug on qemu-kvm-0.12.1.2-2.398.el6.x86_64. 

1. Boot a guest:

 /usr/libexec/qemu-kvm -cpu SandyBridge -M rhel6.5.0 -enable-kvm -m 2048 -smp 2,sockets=2,cores=1,threads=1 -name rhel6.4-64 -uuid 9a0e67ec-f286-d8e7-0548-0c1c9ec93009 -nodefconfig -nodefaults -monitor stdio -rtc base=utc,clock=host,driftfix=slew -no-kvm-pit-reinjection -no-shutdown -device piix3-usb-uhci,id=usb,bus=pci.0,addr=0x1.0x2 -drive file=/home/RHEL-Server-6.4-64-virtio.qcow2,if=none,id=drive-virtio-disk0,format=qcow2,cache=none -device virtio-blk-pci,scsi=off,bus=pci.0,addr=0x5,drive=drive-virtio-disk0,id=virtio-disk0,bootindex=1 -drive if=none,media=cdrom,id=drive-ide0-1-0,readonly=on,format=raw -device ide-drive,bus=ide.1,unit=1,drive=drive-ide0-1-0,id=ide0-1-1 -netdev tap,id=hostnet0,vhost=on -device virtio-net-pci,netdev=hostnet0,id=net0,mac=52:54:00:d5:51:8a,bus=pci.0,addr=0x3 -chardev socket,id=charserial0,path=/tmp/isa-serial,server,nowait -device isa-serial,chardev=charserial0,id=serial0 -device usb-tablet,id=input0 -vnc :10 -vga std -device intel-hda,id=sound0,bus=pci.0,addr=0x4 -device hda-duplex,id=sound0-codec0,bus=sound0.0,cad=0 -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x6 -qmp tcp:0:5566,server,nowait -global PIIX4_PM.disable_s3=0 -global PIIX4_PM.disable_s4=0 -device virtio-serial-pci,id=virtio-serial0,bus=pci.0,addr=0x7 -chardev socket,path=/tmp/qga.sock,server,nowait,id=qga0 -device virtio-serial -device virtserialport,chardev=qga0,name=org.qemu.guest_agent.0

2. Boot the guest on another terminal of host with listening mode "-incoming tcp:0:5800", replace the vnc port and qmp port to some other value.

3. Migrate guest.

(qemu) migrate -d tcp:0:5800

4. Check the migration status until finish.


(qemu) info migrate 
Migration status: active
total time: 9157 milliseconds
transferred ram: 286799 kbytes
remaining ram: 293148 kbytes
total ram: 2113920 kbytes

(qemu) info migrate 
Migration status: completed
total time: 15950 milliseconds
downtime: 46 milliseconds
transferred ram: 548803 kbytes
remaining ram: 56 kbytes
total ram: 2113920 kbytes

(qemu) info migrate 
Migration status: completed
total time: 15950 milliseconds
downtime: 46 milliseconds
transferred ram: 548803 kbytes
remaining ram: 164 kbytes
total ram: 2113920 kbytes

(qemu) info migrate 
Migration status: completed
total time: 15950 milliseconds
downtime: 46 milliseconds
transferred ram: 548803 kbytes
remaining ram: 216 kbytes
total ram: 2113920 kbytes

..... (many time's repeat of "info migrate")

(qemu) info migrate 
Migration status: completed
total time: 15950 milliseconds
downtime: 46 milliseconds
transferred ram: 548803 kbytes
remaining ram: 604 kbytes
total ram: 2113920 kbytes

Hi, Orit

Could you help check the step 4 outputs?  After the migration has completed, the "remaining ram" values will increase from a small value to a larger one (604k in this case). And then will not change any more. In my opinion, it should be 0k after finish migration. 

Thanks, 
Qunfang

Comment 10 Orit Wasserman 2013-08-22 10:58:28 UTC

Hi Qunfang,
I would expect remaining ram to become 0 after migration completes.
It looks like a problem with the accounting of the remaining ram.
Adding the migration stats has exposed this issue, can you open a Bz for it.

Thanks,
Orit

Comment 11 Qunfang Zhang 2013-08-23 03:29:11 UTC

(In reply to Orit Wasserman from comment #10)
> Hi Qunfang,
> I would expect remaining ram to become 0 after migration completes.
> It looks like a problem with the accounting of the remaining ram.
> Adding the migration stats has exposed this issue, can you open a Bz for it.
> 
> Thanks,
> Orit

Hi, Orit

Get it and I create bug 1000231 to track this issue. As the migration statistics output has been added, so I would like to set this bug status to VERIFIED. And let's track the 'remaining ram' issue in bug 1000231. 

Thanks. 
Qunfang

Comment 13 errata-xmlrpc 2013-11-21 07:01:56 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.

http://rhn.redhat.com/errata/RHSA-2013-1553.html