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How do I further investigate a bootchart-generated process chart?

asked 2012-02-29 00:47:49 -0500

kirkb gravatar image

updated 2013-06-04 03:23:41 -0500

I have installed F16 on a SSD and see somewhat quick boot times, but nothing like the 10 or 20 seconds reported elsewhere. I have installed bootchart to see what is taking so long, as the boot process seems to stall right before the login process kicks in.

The bootchart shows about 50 or 60 seconds of a lot of "sleeping" processes with no CPU or IO occurring (Disk Throughput and CPU Usage are 0). None of the sleeping processes seem to be doing anything at all.

Am I reading this right? How do I investigate what is going on?

I can't attach so here is a link to the bootchart bootchart.png (if allowed).

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answered 2012-02-29 14:13:32 -0500

mooninite gravatar image

Your bootchart clearly shows that your NFS mounts are causing the delay.

Do you have a hardwired or wireless network connection?

Have you tried running this command?:

# systemctl enable NetworkManager-wait-online.service

If you do not need your NFS mounts mounted at boot time you can add "noauto" to your /etc/fstab file.

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Asked: 2012-02-29 00:47:49 -0500

Seen: 1,041 times

Last updated: Jun 04 '13