i.MX ProcessorsのトピックRe: Optimise systemd service in root file system

Optimise systemd service in root file system

vinothkumars — Sat, 23 Feb 2019 10:30:48 GMT

Hi All,

I am working on imx6solo + orion linux. I want to disable the systemd services for reduce the boot time and I analyse following systemd service by using the systemd-analyze blame command.

48.909s systemd-journald.service
36.501s dev-mmcblk0p1.device
16.426s systemd-journal-flush.service
10.382s udev-trigger.service
9.470s systemd-tmpfiles-setup.service
9.398s systemd-timesyncd.service
8.495s systemd-udevd.service
6.603s systemd-update-utmp.service
3.911s systemd-logind.service
3.527s remount-rfs-rw.service
3.448s systemd-tmpfiles-setup-dev.service
3.303s sys-fs-fuse-connections.mount
3.139s systemd-sysctl.service
2.358s systemd-remount-fs.service
2.175s udev.service
1.590s sys-kernel-debug.mount
1.369s systemd-random-seed.service
1.210s tmp.mount
1.113s systemd-update-utmp-runlevel.service
193ms systemd-networkd.service
191ms systemd-resolved.service

These services takes almost 1 minute 30 seconds to complete.

Is there any possible way to disable these service when boot ? and I really want to disable in code side.

Or I want to reduce the time.

Regards,

VinothS

Re: Optimise systemd service in root file system

b36401 — Mon, 25 Feb 2019 07:22:10 GMT

There is nothing special regarding to i.MX. I can provide you some common recommendations.

You can remove all unnecessary options and modules from the kernel.
For example if you do not need ethernet you can compile the kernel without its support.

And you need to remove all unnecessary packages and disable all unnecessary services.

Have a great day,
Victor

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Re: Optimise systemd service in root file system

vinothkumars — Mon, 25 Feb 2019 07:36:05 GMT

Hi Victor,

Thank you for you reply.

Do you know how to disable the systemd services?

Regards, VinothS

Re: Optimise systemd service in root file system

turker — Mon, 25 Feb 2019 14:46:17 GMT

You can disable a service using "systemctl disable servicename" command or remove the related symlink under /etc/systemd/system/

Re: Optimise systemd service in root file system

vinothkumars — Mon, 25 Feb 2019 16:02:45 GMT

Thank you for your reply..

Re: Optimise systemd service in root file system

vinothkumars — Wed, 29 May 2019 12:52:20 GMT

I removed the systemd packages and now the boot take with in 10 seconds. I closed this thread now.

Regards,

VinothS

Re: Optimise systemd service in root file system

Raana — Tue, 24 Dec 2019 05:45:05 GMT

Hi Vinoth,

May I know, How you removed ? and where ?

Because, I'm trying to reduce the rootfs size. At the same time, do you know how to disable hwdb files ?

Thank You.

Best Regards,

J.P.Raja

Re: Optimise systemd service in root file system

vinothkumars — Tue, 24 Dec 2019 05:54:26 GMT

Hi,

I removed the whole systemd packages from the build.

Thanks,

VinotS,

Re: Optimise systemd service in root file system

charanguda — Tue, 11 Jun 2024 04:56:55 GMT

Hi,

how did you removed whole systemd could you please explain briefly.

Thanks,

Regards,

charan