Bug 967780 - Bad perfomance in virt-install (network boot)
Summary: Bad perfomance in virt-install (network boot)
Alias: None
Product: Fedora
Classification: Fedora
Component: virt-manager
Version: 19
Hardware: Unspecified
OS: Unspecified
Target Milestone: ---
Assignee: Cole Robinson
QA Contact: Fedora Extras Quality Assurance
Depends On:
Blocks: F19-accepted, F19FinalFreezeException
TreeView+ depends on / blocked
Reported: 2013-05-28 10:33 UTC by Igor Gnatenko
Modified: 2013-06-12 19:59 UTC (History)
7 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Last Closed: 2013-06-12 19:59:18 UTC

Attachments (Terms of Use)
ps sort cpu load (2.70 KB, image/png)
2013-05-28 10:33 UTC, Igor Gnatenko
no flags Details

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):

How reproducible:

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.

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