Am Samstag, 13. Oktober 2012, 16:40:45 schrieb Canek Peláez Valdés: > On Sat, Oct 13, 2012 at 4:14 PM, Volker Armin Hemmann > > <[email protected]> wrote: > > Am Samstag, 13. Oktober 2012, 15:57:31 schrieb Canek Peláez Valdés: > >> On Sat, Oct 13, 2012 at 3:40 PM, Canek Peláez Valdés <[email protected]> > > > > wrote: > >> > On Sat, Oct 13, 2012 at 3:24 PM, Philip Webb <[email protected]> wrote: > >> >> Regulars will remember the threads re the machine I built recently. > >> >> I thought they mb interested in the start-up time now all is working : > >> >> Gigabyte BIOS 10 s , Linux Lilo prompt - login prompt 8 s , > >> >> 'startx' - GUI ready 4 s : total 22 s + entering userid+password ; > >> >> I start the I/net connection (Dhcpcd) manually from the GUI ( 15 s ). > >> >> I assume most of the speed is attributable to the SSD, > >> >> perhaps a bit to the 1600 MHz memory; of course, Gentoo shares the > >> >> honors; > >> >> my desktop manager is Fluxbox & I start apps on desktops manually. > >> > > >> > Toshiba Portégé Z830, with an iCore 5 at 1.60GHz, 6 GB of memory, and > >> > a tiny 128 GB SSD. It takes 12 seconds from GRUB to GDM, and from the > >> > time I enter my password and my GNOME 3 desktop is ready it takes > >> > another 6 seconds, so 18 seconds in total (plus how much it takes for > >> > me to click in my user and enter my password). > >> > > >> > Like you, I attribute most of the speed gain to the SSD. The rest is > >> > systemd. > >> > >> Damn, is GNOME fat. I booted to text console (disabled GDM), and I > >> also disabled plymouth. From GRUB2 to login prompt it takes less than > >> 6 seconds, so the really slow part is starting GDM and then switching > >> to GNOME 3. The BIOS is pretty fast, it takes 4 seconds from power on > >> to the GRUB2 menu. > >> > >> The fast part (GRUB2->login prompt) is because of systemd. > > > > I doubt that, > > Install systemd and do the test; I got the numbers to prove it. > systemd is consistently faster than OpenRC (which doesn't even > properly support parallel starting of services), sometimes several > times faster. > > Luca Barbato mentioned about a way to make OpenRC use busybox in > reentrant mode; the difference in speed in that case should be less. > However, the fact is that OpenRC doesn't support parallel start of > services; it said so in its own documentation: > > https://bugs.gentoo.org/show_bug.cgi?id=391945#c10 > > "rc_parallel has never officially been declared a stable feature (see > the comments in rc.conf regarding this)." > > So no matter how fast the scripts could execute (which anyway will be > slower than small highly optimized C programs), the lack of proper > parallelization will make OpenRC slower than systemd. > > So doubt as much as you want. It doesn't change the fact that (in this > particular issue), you are wrong. >
and since I use openrc with parallel startup, I just doubt it even more. The place where I lose time is starting of my five md-raids. And that is something not even systemd can speed up. -- #163933
