Bug 967780

Summary: Bad perfomance in virt-install (network boot)
Product: [Fedora] Fedora Reporter: Igor Gnatenko <ignatenko>
Component: virt-managerAssignee: Cole Robinson <crobinso>
Status: CLOSED WORKSFORME QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: unspecified Docs Contact:
Priority: unspecified    
Version: 19CC: awilliam, berrange, crobinso, hbrock, ignatenko, jforbes, virt-maint
Target Milestone: ---   
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2013-06-12 19:59:18 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: 834091    
Attachments:
Description Flags
ps sort cpu load none

Description Igor Gnatenko 2013-05-28 10:33:30 UTC 
Created attachment 753820 [details]
ps sort cpu load

Description of problem:
Bad perfomance in virt-install (network boot)

Version-Release number of selected component (if applicable):
libvirt-1.0.5.1-1.fc19.x86_64
virt-manager-0.10.0-0.4.gitb68faac8.fc19.noarch
qemu-kvm-1.4.2-2.fc19.x86_64
virt-install-0.10.0-0.4.gitb68faac8.fc19.noarch
kernel-3.9.4-300.fc19.x86_64


How reproducible:
always

Steps to Reproduce:
1. virt-install --name fedoratestday --ram 1024 --disk path=/home/brain/fedoratestday.img,size=10 --location http://download.fedoraproject.org/pub/fedora/linux/development/19/x86_64/os/ or in virt-manager
2. Boot
3. Enter language
4. Calculate dependence 

Actual results:
Some letters aren't shown and bad performance (100% load cpu) 

Expected results:
Good performance

Additional info:
beta dvd|netinst works correctly
Comment 1 Fedora Blocker Bugs Application 2013-05-29 16:23:01 UTC 
Proposed as a Freeze Exception for 19-final by Fedora user ignatenkobrain using the blocker tracking app because:

 Virtualization load from network imho shall work
Comment 2 Adam Williamson 2013-05-29 19:41:21 UTC 
I can't reproduce this exactly. CPU load does seem to be generally higher in the kernel pair boot case where anaconda itself is retrieved from the remote repo, but I don't ever see it 'stick' at 100%.

if I do a kernel pair boot and pass 'inst.repo=http://dl.fedoraproject.org/pub/fedora/linux/development/19/x86_64/os/' then I see 100% CPU use for a short time during installer init, then it drops, then spikes to 100% for a while longer while 'calculating dependencies', then drops to almost 0% as long as I just sit on hub. when I start an install it again spikes to 100% a couple of times while partitioning, then when it settles into package installation, it tends to bounce between 20-30% and 100%. But at no point does it just 'stick' at 100% usage, and the times when it's at 100% seem to be reasonably related to actual operations happening at that point in time.
Comment 3 Cole Robinson 2013-06-12 19:59:18 UTC 
Given lack of reproducer in Comment #2 and no follow up, closing. If someone can still reproduce, please reopen.