|
On 09/08/2010 07:48 PM, Michał Piotrowski wrote: I disabled some services and I noticed something interesting - it almost doesn't speed up the boot process. First of all... Systemd does parallelization startup which means if you disables a service it will make little to no effect speeding up things and just FYI benchmarking anything on any Fedora release when it's in development stage is generally not a very good idea... We have several debugging option turned on that skew any kind of benchmarking/performance testing . Secondly... As is clearly stated in on the feature page for systemd [1] "The readahead packages need to be adapted for systemd. readahead is currently one of the very few packages using upstart specific features and hence is not activated when booting with systemd. However, due to the more aggressive parallelization, disk access is much more random when systemd is used and hence the effect of readahead considerable. Or to put it the other way round: unless we have readahead systemd won't perform any better than upstart/sysv during bootup on rotating media. On SSD systemd is considerably faster though in every case as readahead is not necessary there." Which means if you are on rotating media you may or may not experience faster bootup. And let's not forget that faster bootup is just one of many systemd superiority to the old traditional way of doing things. Thirdly... As Lennart has mentioned [2]. "Well, with some newer systemd features (that we'll probably enable for fedora in f15 [1]) we are currently measuring bootups of < 7s (and a pid <500) from grub to panel showing up on the screen. (that's kay's X300 with ssd on a modified opensuse), 5s or so are actually spent in gnome of those." Lennart's primary focus ( and others ) have been on making the transaction to systemd as painless as possible and when those issues ( and any bugs encountered ) are out of the way then If and only if Lennart has the time within the F14 development time frame he will try to convert readahead. Forthly I think it shows a good sign of health when users seem to repeatedly forget that we have not hit beta yet :) JBG [1] http://fedoraproject.org/wiki/Features/systemd [2] http://lists.fedoraproject.org/pipermail/desktop/2010-August/006438.html |
-- test mailing list test@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe: https://admin.fedoraproject.org/mailman/listinfo/test
