Hi,
this time with the real mail address and not the spam mail address of
last time (oops), replays down below
On 28.01.19 12:02, Alexander Graf wrote:
On 28.01.19 11:38, Matthias Brugger wrote:
Hi Tobias,
Thanks for looking into that.
adding opensuse-arm mailinglist, that's where further discussion should take
place.
Comments below.
On 25/01/2019 20:54, admins wrote:
On 25.01.19 19:59, Bruno Friedmann wrote:
On jeudi, 24 janvier 2019 11.53:34 h CET Axel Braun wrote:
Gesendet: Donnerstag, 24. Januar 2019 um 08:53 Uhr
Von: "Matthias Brugger" <[email protected]>
An: "Basil Chupin" <[email protected]>, opensuse-project
<[email protected]> Cc: "nicolas saenz julienne"
<[email protected]>
Betreff: Re: [opensuse-project] No info. re Leap 15.1 in Wikipedia
I think we read about people complaining on the performance of openSUSE
this week already. I haven't done any measurements but heard that on
Raspberry Pi 3, Debian is significantly faster in booting then openSUSE.
Raspi are heavily depending on the kind of 'hard disk' you are using,
whether it is a SD card (connected via USB2) or an internal SSD Here is the
result of a Raspi using a Leap 15 LXQT image:
/home/test # systemd-analyze blame
1min 30.071s display-manager.service
1min 18.481s backup-rpmdb.service
14.815s ca-certificates.service
13.788s postfix.service
12.885s btrfsmaintenance-refresh.service
11.001s apparmor.service
10.121s logrotate.service
9.277s backup-sysconfig.service
7.925s ModemManager.service
7.755s lvm2-monitor.service
5.889s NetworkManager.service
5.086s postgresql.service
4.790s initrd-switch-root.service
3.074s systemd-journal-flush.service
2.868s nscd.service
2.721s kbdsettings.service
2.672s sshd.service
2.316s ntpd.service
2.191s avahi-daemon.service
2.153s systemd-udevd.service
1.967s polkit.service
1.959s [email protected]
1.299s systemd-tmpfiles-setup-dev.service
1.171s systemd-remount-fs.service
1.095s sys-kernel-debug.mount
943ms systemd-logind.service
920ms upower.service
803ms wpa_supplicant.service
789ms dev-mqueue.mount
736ms dev-hugepages.mount
715ms boot-efi.mount
598ms udisks2.service
493ms systemd-journald.service
482ms initrd-parse-etc.service
440ms systemd-udev-trigger.service
436ms systemd-modules-load.service
435ms auditd.service
403ms dracut-cmdline.service
348ms systemd-random-seed.service
251ms initrd-cleanup.service
250ms systemd-tmpfiles-setup.service
247ms systemd-sysctl.service
210ms systemd-update-utmp-runlevel.service
207ms
dev-disk-by\x2duuid-d90960ec\x2df373\x2d472d\x2d8b3f\x2d27a48d232d7a.swap
193ms systemd-fsck-root.service
184ms plymouth-switch-root.service
170ms sysroot.mount
166ms sys-fs-fuse-connections.mount
159ms systemd-user-sessions.service
151ms kmod-static-nodes.service
112ms systemd-rfkill.service
98ms plymouth-quit.service
97ms plymouth-read-write.service
85ms systemd-vconsole-setup.service
76ms rtkit-daemon.service
60ms dracut-shutdown.service
51ms check-battery.service
51ms systemd-update-utmp.service
21ms initrd-udevadm-cleanup-db.service
18ms sys-kernel-config.mount
16ms plymouth-quit-wait.service
Quite strange, btrfsmaintenance and lvm2-monitor enabled, although both are
not used. Clearly most time is burned on display-manager and backup of the
rpm-db (could this not be moved to a systemd-timer triggered event at a
later point in time?)
Cheers
Axel
Most of the service you see there aren't they systemd timers that run because
it was not running during their normal schedule.
Did you try to reboot half an hour after this boot how it behaves ?
Ahrrr tests :-)
I can confirm that the openSUSE boot times on a Raspi 3 are horrendous for
several reasons. I tested and tweaked the unstable tumbleweed images, so take it
with precaution, Leap might behave different:
* It takes quite some time until even grub2 is loaded (u-boot uefi chainload),
but it brings a full grub2 with options to load different kernels or even
distributions. (So for me this is worth the wait)
With which u-boot did you test? I think there were some changes to the
distroboot scripts which might add more device probing before we actually find
and run the grub binary.
I did test with u-boot 2018.x, which comes with the latest Tumbleweed
appliance, and uboot 2019.01, forked from hardware:boot [1], no difference.
We have a U-Boot timeout of 2 seconds, that adds time. Then U-Boot's USB
initialization also takes a while. On top of that, we search for overlay
DTs as well, which again may take a few ms.
Either way, feel free to identify big chunks here and optimize them :).
* It takes quite along time until the handover (uboot, uefi -> kernel) is done:
+ u-boot slow at reading the actual files (kernel+initrd)
You mean reading the grub binary. Grub is in charge to load kernel+initrd.
No i mean the linux kernel and initrd, i thought u-boot would read those
files for grub2, anyway, reading those two takes ages for me. Using a
tumbleweed image (and my slow sd card) i have a total boot time of
around 1 min 45 sec _after_ hitting enter in grub, where 1min 15 sec is
for reading those two files, the rest is for the kernel to boot to the
multiuser login screen.
+ a not compressed kernel image (~24MB uncompressed vs ~8MB compressed)
+ a initrd which ships (even after first installation and "mkinitrd") several
kiwi components
Which components do you refer to?
Ok, not several, but one only necessary for firstboot:
dracut-kiwi-lib
dracut-kiwi-oem-repart
after removing those compressed initrd size goes down from ~14MB to ~8MB
(of course a mkinitrd run inbetween)
* Always triggered backup-*.timer(s) and mandb-timer
So to cut boot times idid several things:
* remove all kiwi packages -> smaller initrd file
* disable the above mentioned triggers -> this might not be applicable on a
intended stable system
* create and use a kernel with a compressed instead of an uncompressed kernel
image [1].
I'm not sure if we should add this to the kernel build infrastructure, as it is
a RPi3 thing. Thoughts?
It doesn't have to be an RPi3 thing. Grub can extract files before
booting them. We could probably just start shipping Image.gz (or some
other compression method) files instead of plain Image ones in
kernel-default.rpm.
Obviously, this will need a bit of auxiliary adjustments as well.
Someone will have to double-check that grub really does extract it
before running it. There are also a few scripts that check for the file
name and may not execute on an Image.gz file. Once all that is
identifies, we should set respective dependency rules in the kernel rpm.
But overall, this would be a *big* improvement for everyone. It means
we'd waste much less space on /boot too!
Its certainly not a Raspi thing, as shipping compressed kernel for other
architectures is not either, it is all available upstream in the kernel.
Concerning arm64, right now we can ship the uncompressed "Image" or the
compressed "Image.gz". As noted in my first email i have gone ahead and
created a kernel-default package which ships a compressed image [2]. For
some reason, i did not find the time to investigate (yet), shipping
Image.gz does not work out (no grub entry + no initrd), yet installing
and renaming the Image.gz to Image (still compressed), works and boots
fine on my raspi 3.
[1]: https://build.opensuse.org/project/monitor/home:tobijk:basesystem
[2] https://build.opensuse.org/package/show/home:tobijk:kernel/kernel-source
Greetings,
Tobias
Could you please open a FATE for this?
Alex
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