Features/20SecondStartup

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== Release Notes ==
 
== Release Notes ==
  
''Note: all of the following release notes are subject to change.''
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To reduce boot time, the setroubleshoot daemon and several small bottlenecks were removed. Regressions in using the readahead service were removed by setting low I/O priorities. Readahead now profiles the system every time the rpm database changes. The behavior of readahead can be tweaked by editing /etc/sysconfig/readahead.
 
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To reduce boot time, the setroubleshoot daemon and several small bottlenecks were removed. Regressions in using the readahead service were removed by setting low I/O priorities. Readahead now profiles the system every time the rpm database changes.
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<!-- The Fedora Release Notes inform end-users about what is new in the release.  Examples of past release notes are here: http://docs.fedoraproject.org/release-notes/ -->
 
<!-- The Fedora Release Notes inform end-users about what is new in the release.  Examples of past release notes are here: http://docs.fedoraproject.org/release-notes/ -->

Latest revision as of 08:27, 16 April 2009


Contents

[edit] 20SecondStartup

[edit] Summary

Boot faster than the F10 Features/30SecondStartup. Make Fedora boot and shut down faster. The goal is to be at the login screen in 20 seconds and be as fast as possible after the login (gnome-session).

[edit] Owner

[edit] Current status

  • Targeted release: Fedora 11
  • Last updated: (Apr 14 2009)
  • Percentage of completion: 100% ( 10/10 filed bugs resolved, rest moved to F12)

[edit] Detailed Description

Identify bloated tasks in the boot process and make them faster and use less disk I/O.

See: Fedora 10 top 5 disk usage tasks http://www.harald-hoyer.de/personal/blog/fedora-10-disk-io

See, if sreadahead can be used (needs kernel patch), and if Upstart can start core services in parallel.

[edit] Benefit to Fedora

A faster boot makes for happy users.

[edit] Scope

Possibly involves all packages that are involved in the boot sequence, udev, module-init-tools, kernel, nash, upstart, readahead, setroubleshoot, gdm.

[edit] Test Plan

  • install bootchart
  • modify /sbin/bootchartd to exit on "firefox" not "gdm kdm" etc. and sleep 10-20 seconds after that
  • reboot, login, start firefox, close firefox
  • measure time until closing of firefox

See detailed instructions and test results at QA/Test Days/2009-02-19.

[edit] User Experience

Turn on computer, wait 20 seconds, select user on login screen.

[edit] Dependencies

  • kernel for sreadahead or another mechanism to gather information about what files are used during the boot process

[edit] Blocker Bugs

[edit] Contingency Plan

This is an incremental feature. If we don't quite get down to 20 seconds, too bad, we can just take whatever improvements we have.

[edit] Documentation

Fedora 10 top 5 disk usage tasks
http://www.harald-hoyer.de/personal/blog/fedora-10-disk-io
Fedora 10 - Boot Analysis
https://www.harald-hoyer.de/personal/blog/fedora-10-boot-analysis
Upstart
http://upstart.ubuntu.com/wiki/
sreadahead
http://code.google.com/p/sreadahead/
setroubleshoot
https://fedorahosted.org/setroubleshoot/
Summary of the Fedora 11 - 20 Seconds Boot Feature - Test Day
http://www.harald-hoyer.de/personal/blog/20_Seconds_Boot_Feature_Test_Day

[edit] Resolved Bugs

[edit] Bugs for F12

[edit] Release Notes

To reduce boot time, the setroubleshoot daemon and several small bottlenecks were removed. Regressions in using the readahead service were removed by setting low I/O priorities. Readahead now profiles the system every time the rpm database changes. The behavior of readahead can be tweaked by editing /etc/sysconfig/readahead.


[edit] Comments and Discussion