Booting the kernel faster

daguq · 2016-09-18 04:55:44

Here's my

 systemd-analyze
Startup finished in 4.029s (kernel) + 418ms (userspace) = 4.448s

and my systemd-analyze critical-chain output

graphical.target @418ms
└─gdm.service @408ms +10ms
  └─systemd-user-sessions.service @403ms +2ms
    └─network.target @383ms
      └─NetworkManager.service @300ms +82ms
        └─dbus.service @223ms
          └─basic.target @201ms
            └─sockets.target @197ms
              └─dbus.socket @194ms
                └─sysinit.target @169ms
                  └─systemd-udev-trigger.service @102ms +62ms
                    └─system.slice @69ms
                      └─-.slice @61ms

From what I understand that , it is all related to the starting of services needed to run the GUI , not the services that were started with the kernel.
Any help on how I can further speed up the kernel boot process , will be appreciated

jasonwryan · 2016-09-18 04:58:23

You are booting in under 5 seconds and you want to speed it up? o_0

daguq · 2016-09-18 05:07:39

I am actually testing how much farther can I go with the boot up process , faster it is , better !
"There are no two words in the English language more harmful than "good job"."

daguq · 2016-09-18 05:08:30

jasonwryan wrote:

You are booting in under 5 seconds and you want to speed it up? o_0

I am actually testing how much farther can I go with the boot up process , faster it is , better !

jasonwryan · 2016-09-18 06:03:21

Don't expect to make too much in the way of perceptible gains at this point; you are essentially just ricing from here...

DeadMetaler · 2016-09-18 09:14:15

daguq wrote:

Here's my

 systemd-analyze
Startup finished in 4.029s (kernel) + 418ms (userspace) = 4.448s

Booted from MBR or GPT?

brebs · 2016-09-18 09:43:12

You could compile your own kernel, including only the modules that you actually use.

ooo · 2016-09-18 12:00:02

Usually, with regular arch kernel, more time is spent loading the initramfs instead of the actual kernel. I think in your case systemd-analyze reports time spent loading both the kernel and initramfs in the "kernel" field.

See https://wiki.archlinux.org/index.php/Im … #Initramfs

daguq · 2016-09-18 18:30:54

brebs wrote:

You could compile your own kernel, including only the modules that you actually use.

Exactly , I would like that . But how ?

eschwartz · 2016-09-18 18:51:37

https://wiki.archlinux.org/index.php/Ke … figuration

Also see https://wiki.archlinux.org/index.php/Modprobed-db

infinarchy · 2016-09-21 05:01:47

empty

Last edited by infinarchy (2017-11-04 21:44:32)

baronmax · 2016-09-22 20:45:13

There is a video on youtube about booting Linux in under 1 second, perhaps there's something to be learned from there. He's talking about SoCs, but it's the same principles.

Arch Linux

#1 2016-09-18 04:55:44

Booting the kernel faster

#2 2016-09-18 04:58:23

Re: Booting the kernel faster

#3 2016-09-18 05:07:39

Re: Booting the kernel faster

#4 2016-09-18 05:08:30

Re: Booting the kernel faster

#5 2016-09-18 06:03:21

Re: Booting the kernel faster

#6 2016-09-18 09:14:15

Re: Booting the kernel faster

#7 2016-09-18 09:43:12

Re: Booting the kernel faster

#8 2016-09-18 12:00:02

Re: Booting the kernel faster

#9 2016-09-18 18:30:54

Re: Booting the kernel faster

#10 2016-09-18 18:51:37

Re: Booting the kernel faster

#11 2016-09-21 05:01:47

Re: Booting the kernel faster

#12 2016-09-22 20:45:13

Re: Booting the kernel faster

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