A Two-Second Boot Time With systemd

[phoronix]

Phoronix: A Two-Second Boot Time With systemd

Lennart Poettering has written a guide for optimizing systemd to the extent that a two-second boot-time or less for this popular free software project...

http://www.phoronix.com/vr.php?view=MTEwMjc

[cygn]

yep!

$ systemd-analyze time
Startup finished in 1290ms (kernel) + 5834ms (userspace) = 7125ms

And this is even with serious services running:

$ systemd-analyze blame
  2449ms mysqld.service
   966ms netfs.service
   793ms NetworkManager.service
   689ms opt.mount
   621ms nxserver.service
   518ms chronyd.service
   505ms httpd.service

[ChrisXY]

Well, default systemd:


But aside from that, starting KDE still takes 5+ seconds, even with an SSD. So what's the point for desktop distributions in extremely fast booting when the desktop environment still takes multiple times the boot times to start up?

[halfmanhalfamazing]

yep!

$ systemd-analyze time
Startup finished in 1290ms (kernel) + 5834ms (userspace) = 7125ms

And this is even with serious services running:

$ systemd-analyze blame
  2449ms mysqld.service
   966ms netfs.service
   793ms NetworkManager.service
   689ms opt.mount
   621ms nxserver.service
   518ms chronyd.service
   505ms httpd.service

How about on older computers? A single core P4-HT? A 1ghz Duron?

I think it's great either way, but I didn't see any target system mentioned and my curiosity is raised.

[halfmanhalfamazing]

But aside from that, starting KDE still takes 5+ seconds, even with an SSD. So what's the point for desktop distributions in extremely fast booting when the desktop environment still takes multiple times the boot times to start up?

Um, if my math serves me correctly - your bootup time would be 7 seconds.

Which is sweet. Much better than what we have today, no?

Besides, you should see what Martin Graesslin is up to:

http://blog.martin-graesslin.com/blo...p-performance/

[ChrisXY]

Um, if my math serves me correctly - your bootup time would be 7 seconds.
Which is sweet. Much better than what we have today, no?

With standard systemd and e4rat with a rotational hard disk my boot was pretty much completely I/O bound. I now use an SSD and in my graph I see very few seconds for the actual boot. psd.service is "profile-sync-daemon" and it copies my firefox profile in a tmpfs. So once the overwhelming majority of my boot time is I/O.

[grigi]

ChrisXY, if you use the nvidia drivers, it delays X startup by 4 seconds. Could this be extending your KDE startup times?

I was wondering because on my parents machine (an AMD A6-3500 based system) KDE starts up in about 2 seconds, whereas my old Dell notebook starts KDE in about 8 seconds, and I found half the time it is just waiting for the Nvidia driver to initialize something.

[ChrisXY]

open source radeon driver, but my .kde4 is 116M and .local/share/akonadi/ is 283M.

[grigi]

open source radeon driver, but my .kde4 is 116M and .local/share/akonadi/ is 283M.

wow!

[evolution]

I've just read the tips for making systemd booting faster. ATM, I use it as my default init program. Unfortunately, it seems some tips mentioned in the FreeDesktop-related site apply only for Fedora, excluding other linux distros...

Simultaneously, I don't understand why using a bloated DE such as GNOME 3 / KDE 4 can make systemd faster (are there any specific optimizations for those DE's that exist on systemd code?). ATM I use Openbox and I don't have any of the *kits (ConsoleKit, PolKit, etc.) enabled. Btw, my Core i7 system loads in less than 5 seconds...

Cheers

p.s.: The systemd tips btw, are great for those who think that systemd is bloat, which is not, btw...