Features/BootShutdownSpeedup
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We do enough Stupid Stuff that we can make easy improvements to startup and shutdown time without large systemic changes. Includes: tagging of scripts that don't need shut down, profiling of boot, potential changes to how we organize disk blocks, and more. | We do enough Stupid Stuff that we can make easy improvements to startup and shutdown time without large systemic changes. Includes: tagging of scripts that don't need shut down, profiling of boot, potential changes to how we organize disk blocks, and more. | ||
| − | + | # do less stuff. | |
| − | Why are we starting so many things up during boot? | + | #*Why are we starting so many things up during boot? |
| − | Do I need to be running a smartcard daemon on a system with no smartcard reader? | + | #*Do I need to be running a smartcard daemon on a system with no smartcard reader? |
| − | Do I need a bluetooth service on a system with no bluetooth? | + | #*Do I need a bluetooth service on a system with no bluetooth? |
| − | + | #Turn off SSHd as default and change config file to not allow direct root log in! | |
| − | Turn off SSHd as default and change config file to not allow direct root log in! | + | |
etc etc | etc etc | ||
| − | + | # do less stuff. | |
| − | For the apps that we *do* need to start up, make them behave properly | + | #*For the apps that we *do* need to start up, make them behave properly instead of opening gazillions of files pointlessly. |
| − | instead of opening gazillions of files pointlessly. | + | #*More IO tracing work needed here to find the latest round of bad juju. (It's a different set of culprits every release). |
| − | More IO tracing work needed here to find the latest round of bad juju. | + | # minimise contention. |
| − | (It's a different set of culprits every release). | + | #*Instead of having everything competing for disk bandwidth during startup, we could have say.. cups start up, and do nothing for a while, and when the disk becomes idle, /then/ do its IO pulling in configs etc. |
| − | + | #*The set_ioprio syscalls added a few kernels back may also be interesting. | |
| − | Instead of having everything competing for disk bandwidth during startup, | + | |
| − | we could have say.. cups start up, and do nothing for a while, and when the | + | |
| − | disk becomes idle, /then/ do its IO pulling in configs etc. | + | |
| − | The set_ioprio syscalls added a few kernels back may also be interesting. | + | |
| − | Does Not Include: [[Releases/FeatureNewInit| init system changes]] | + | Does Not Include: [[Releases/FeatureNewInit| init system changes]] |
== References == | == References == | ||
| Line 58: | Line 53: | ||
---- | ---- | ||
| − | [[Category: | + | |
| + | [[Category:FeaturePageIncomplete]] | ||
Latest revision as of 00:02, 6 August 2008
Contents |
[edit] Improve speed of bootup and shutdown
- Last modified: [[Date(2007-01-03T20:23:23Z)]
- Owners: BillNottingham, DavidZeuthen, DaveJones, ChrisBlizzard
- Targeted release:
[edit] Current status
- Will not be included in F7 (16-APR-07)
[edit] Summary
Make Fedora boot and shut down faster.
[edit] Usage cases/rationale
While Xerxes appreciates that he can grab a cup of coffee while waiting for his Fedora system to boot, it becomes annoying when he is not actually thirsty.
[edit] Scope
[edit] Test Plan
Profile boot of FC6 and F7, make sure there are significant improvements.
[edit] Dependencies
[edit] Details
We do enough Stupid Stuff that we can make easy improvements to startup and shutdown time without large systemic changes. Includes: tagging of scripts that don't need shut down, profiling of boot, potential changes to how we organize disk blocks, and more.
- do less stuff.
- Why are we starting so many things up during boot?
- Do I need to be running a smartcard daemon on a system with no smartcard reader?
- Do I need a bluetooth service on a system with no bluetooth?
- Turn off SSHd as default and change config file to not allow direct root log in!
etc etc
- do less stuff.
- For the apps that we *do* need to start up, make them behave properly instead of opening gazillions of files pointlessly.
- More IO tracing work needed here to find the latest round of bad juju. (It's a different set of culprits every release).
- minimise contention.
- Instead of having everything competing for disk bandwidth during startup, we could have say.. cups start up, and do nothing for a while, and when the disk becomes idle, /then/ do its IO pulling in configs etc.
- The set_ioprio syscalls added a few kernels back may also be interesting.
Does Not Include: init system changes
[edit] References
- http://en.opensuse.org/Boot_time. Includes boot scripts and various analysis
[edit] Comments
- BastienNocera: how about removing useless services from the shutdown runlevel. Many services are stopped that don't actually need to be handled any better than with kill.
- (notting) I've prototyped this; you can cut shutdown roughly in half with this and some other tweaks. It gets slightly messy because you need to retain backwards compatiblity, though.
