RHEL Engineering is moving the tracking of its product development work on RHEL 6 through RHEL 9 to Red Hat Jira (issues.redhat.com). If you're a Red Hat customer, please continue to file support cases via the Red Hat customer portal. If you're not, please head to the "RHEL project" in Red Hat Jira and file new tickets here. Individual Bugzilla bugs in the statuses "NEW", "ASSIGNED", and "POST" are being migrated throughout September 2023. Bugs of Red Hat partners with an assigned Engineering Partner Manager (EPM) are migrated in late September as per pre-agreed dates. Bugs against components "kernel", "kernel-rt", and "kpatch" are only migrated if still in "NEW" or "ASSIGNED". If you cannot log in to RH Jira, please consult article #7032570. That failing, please send an e-mail to the RH Jira admins at rh-issues@redhat.com to troubleshoot your issue as a user management inquiry. The email creates a ServiceNow ticket with Red Hat. Individual Bugzilla bugs that are migrated will be moved to status "CLOSED", resolution "MIGRATED", and set with "MigratedToJIRA" in "Keywords". The link to the successor Jira issue will be found under "Links", have a little "two-footprint" icon next to it, and direct you to the "RHEL project" in Red Hat Jira (issue links are of type "https://issues.redhat.com/browse/RHEL-XXXX", where "X" is a digit). This same link will be available in a blue banner at the top of the page informing you that that bug has been migrated.
Bug 1638835 - High Host CPU load for Windows 10 Guests (Update 1803) when idle [rhel-7.6.z]
Summary: High Host CPU load for Windows 10 Guests (Update 1803) when idle [rhel-7.6.z]
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 7
Classification: Red Hat
Component: qemu-kvm-rhev
Version: 7.7
Hardware: x86_64
OS: Linux
urgent
medium
Target Milestone: rc
: ---
Assignee: Vitaly Kuznetsov
QA Contact: liunana
URL:
Whiteboard:
Depends On: 1610461 1644693
Blocks: 1624786 1690641
TreeView+ depends on / blocked
 
Reported: 2018-10-12 14:35 UTC by Oneata Mircea Teodor
Modified: 2019-03-27 08:26 UTC (History)
32 users (show)

Fixed In Version: qemu-kvm-rhev-2.12.0-18.el7_6.2
Doc Type: Enhancement
Doc Text:
Clone Of: 1610461
: 1690641 (view as bug list)
Environment:
Last Closed: 2019-01-29 18:32:27 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHBA-2019:0209 0 None None None 2019-01-29 18:32:35 UTC

Description Oneata Mircea Teodor 2018-10-12 14:35:20 UTC 
This bug has been copied from bug #1610461 and has been proposed to be backported to 7.6 z-stream (EUS).
Comment 2 Vitaly Kuznetsov 2018-10-15 11:39:03 UTC 
The original BZ (1610461) has a dependency on kernel:
https://bugzilla.redhat.com/show_bug.cgi?id=1631439

It makes no sense to backport this Qemu change without the kernel counterpart.
Comment 6 Michael 2018-11-09 06:20:26 UTC 
Hi all
QE side can verify this Bug now. 

re-test steps:
1) Boot the windows10-1803 guest. 
/usr/libexec/qemu-kvm -enable-kvm -M pc \

-cpu SandyBridge,+kvm_pv_unhalt,hv_stimer,hv_synic,hv_time,hv_relaxed\

-nodefaults -smp 4 -m 4G -name win10-1803 \

-drive file=Windows10-1803.qcow2,if=none,id=guest-img,format=qcow2,werror=stop,rerror=stop -device virtio-blk-pci,drive=guest-img,id=os-disk,bootindex=1 \

-vga qxl -monitor stdio -boot menu=on -vnc :1 \

-netdev tap,id=hostnet0,script=/etc/qemu-ifup,downscript=/etc/qemu-ifdown -device virtio-net-pci,netdev=hostnet0,id=net0,mac=00:84:ed:01:00:06 \

-usbdevice tablet

2) use top command to monitor host cpu usage and save to a file.
e.g #top -p 6358 -n 1800 -d 2 -b >fixed-top-pc-result (about 30 mins)

3) calculate average value with this file.
# cat fixed-top-pc-result |grep qemu-kvm|awk -F ' ' '{print $9;}'|awk '{sum+=$1} END {print "Average = ", sum/NR}'

Average =  2.44881


Environment:
kernel:4.18.0-33.el8.x86_64
qemu-kvm-3.0.0-1.el8+2055+38c90e40.x86_64


Thanks
Comment 7 FuXiangChun 2018-11-12 10:27:18 UTC 
As QE used wrong kernel version to verify this bug. So, please ignore comment6 test result. and move this bug to ON_QA. Sorry to bring you some confusion.
Comment 8 FuXiangChun 2018-11-12 10:30:07 UTC 
Amnon,

According to comment2 & comment3. If 7.6.z kernel isn't fixed. QE cann't verify this bug.
Comment 16 Michael 2018-12-10 06:54:57 UTC 
Hi :

According the best new test result when using the fixed kernel version. The result looks good. 

Released-version number:
[1] 3.10.0-957.3.1.el7.x86_64
[2] qemu-kvm-rhev-2.12.0-19.el7.x86_64


Repeat the steps exactly same with the comment#6

Result:
Average =  4.36678

Now, this BZ can be made Verified. 



Thanks
Comment 18 errata-xmlrpc 2019-01-29 18:32:27 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-2019:0209
Note You need to log in before you can comment on or make changes to this bug.