Latest revision as of 08:27, 16 April 2009

[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

• Name: HaraldHoyer <harald@redhat.com>

[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

• sreadahead review (kernel patch missing, though)
• reimplement /usr/bin/fedora-setup-keyboard in C to speed up boot (fixed)
• only call fedora-setup-keyboard for keyboards (fixed)
• setroubleshoot lazy import (fixed)
• setroubleshoot lazy rpm usage (fixed)
• auditd cannot be started via Upstart (fixed)
• fuse has an unnecessary init script (fixed)
• use dbus service-activation to start the kerneloops daemon (fixed)
• var/run/gdm/auth-for* directories not removed.... slows boot (fixed)

[edit] Bugs for F12

• disturbing hacks to start nfs-utils services on demand (not entirely serious)
• (RFC, PATCH) start cups on demand, using xinetd
• start the bluetooth service via udev
• microcode_ctl busy polling microcode_ctl ships a pointless init script

[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

• See Talk:Features/20SecondStartup