-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On Monday, 2017-11-06 at 08:22 -0500, Anton Aylward wrote:
On 06/11/17 07:07 AM, Arjen de Korte wrote:
So now I would like to ask: why SuSEfirewall2_init.service, display-manager.service, NetworkManager.service, took so long time to be up and running at least on my system?
I don't know if there is a way to check this, but I highly suspect these services are waiting for disk-I/O. All caches are empty at boot time, so everything has to come from disk. This is where SSD drives with essentially zero seek times shine. Changing to SSD drives has been the single biggest performance improvement on my systems.
The first thing that Marco needs to understand is the dependency chain. That's why Carlos pointed to "critical-chain". Ff course that's not the full chain. The critical chain is a one-dimensional slice of the start-up order, which is actually a lot in parallel.
Right. The critital path looks at what causes delays. Where the process is actually waiting for those to finish, can't continue.
To see it all, you need to use the "plot" option. OH MY!
Yes.
The second thing is that yes, there is kernel time, but there is also time in userspace those apps spend initializing, chundling the results of reading those table and caches.
# systemd-analyze time Startup finished in 4.103s (kernel) + 4.227s (initrd) + 32.196s (userspace) = 40.526s
cer@Telcontar:~> systemd-analyze time Startup finished in 1.931s (kernel) + 4.197s (initrd) + 1min 4.194s (userspace) = 1min 10.322s And I boot to text mode with no grahics at all! And I have an SSD! And I don't care. :-) - -- Cheers, Carlos E. R. (from openSUSE 42.2 x86_64 "Malachite" at Telcontar) -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iEYEARECAAYFAloAaS0ACgkQtTMYHG2NR9VXvgCfWZDXJKpgIPuOAFCvvTV7RDBn i0sAn2RgeH96UHqHH4pYhlIorrsHN/kd =+Xqn -----END PGP SIGNATURE----- -- To unsubscribe, e-mail: opensuse-factory+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse-factory+owner@opensuse.org