Arch Linux

1qaz0okm

Member

Registered: 2016-11-23

Posts: 3

Slow Boot Times - Kernel Related

I am experiencing three relatively slow stages when booting my system. The slowness appears to be kernel related with systemd only reporting a critical chain of 2 seconds. I have attached the log below and would appreciate it if anyone could shed some insight into why this slow boot is occurring.

Hardware:
X99 Deluxe II
Intel i7-6850K
16GB (4x4GB) DDR4 DRAM 2133MHz
GTX 1080

dmesg log

Last edited by 1qaz0okm (2016-11-23 08:59:50)

Lone_Wolf

Member

From: Netherlands, Europe

Registered: 2005-10-04

Posts: 11,911

Re: Slow Boot Times - Kernel Related

Those events appear to be early in the boot process and may happen before systemd records timings.

The events also appear to be low-level.
Is microcode updating configured , see https://wiki.archlinux.org/index.php/Microcode ?

Are you running latest uefi firmware for your board ?

Last edited by Lone_Wolf (2016-11-23 22:32:03)

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Disliking systemd intensely, but not satisfied with alternatives so focusing on taming systemd.

(A works at time B)  && (time C > time B ) ≠  (A works at time C)

1qaz0okm

Member

Registered: 2016-11-23

Posts: 3

Re: Slow Boot Times - Kernel Related

There was a BIOS update available but still having the same issues. Microcode appears to be updating and up to date (checked with iucode_tool), although there does seem to be a long gap between updating.

Output from dmesg | grep microcode:

[    0.000000] microcode: microcode updated early to revision 0xb00001f, date = 2016-10-07
[   20.094007] microcode: sig=0x406f1, pf=0x4, revision=0xb00001f
[   20.094207] microcode: Microcode Update Driver: v2.01 <tigran@aivazian.fsnet.co.uk>, Peter Oruba

Lone_Wolf

Member

From: Netherlands, Europe

Registered: 2005-10-04

Posts: 11,911

Re: Slow Boot Times - Kernel Related

The Microcode Update Driver runs late in the boot process, that time matches a slow boot.

Please post full dmesg .

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Disliking systemd intensely, but not satisfied with alternatives so focusing on taming systemd.

(A works at time B)  && (time C > time B ) ≠  (A works at time C)

1qaz0okm

Member

Registered: 2016-11-23

Posts: 3

Re: Slow Boot Times - Kernel Related

Here is the full dmesg. Still slow on the same sections.
dmesg

Lone_Wolf

Member

From: Netherlands, Europe

Registered: 2005-10-04

Posts: 11,911

Re: Slow Boot Times - Kernel Related

No clues what goes wrong.

Try booting with loglevel=7 as kernel parameter, the dmesg from that should have a lot more detail.

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Disliking systemd intensely, but not satisfied with alternatives so focusing on taming systemd.

(A works at time B)  && (time C > time B ) ≠  (A works at time C)