** Package changed: subiquity (Ubuntu) => subiquity
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Title:
console-conf on beaglebone takes unbearable long
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This is also happening with Pi 3. It takes some minutes for console-conf
to show up. Also, account creation takes too long.
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Title:
console-conf
On 23 September 2016 at 22:29, Oliver Grawert wrote:
> with todays daily image (which does not remove the .pyc files anymore)
> the actual startup time got down to a bearable 10-20 seconds
> (stopwatched several fresh boots from hitting enter to having the UI
> appear) ...
Yay.
> the time use
with todays daily image (which does not remove the .pyc files anymore)
the actual startup time got down to a bearable 10-20 seconds
(stopwatched several fresh boots from hitting enter to having the UI
appear) ... the time used during account creation is still between 4 and
5 minutes though, so i wo
> well, the -T makes it pretyt easy to grep for the bigger time hogs
Except the time at the front is the relative time since the start of the
previous syscall. To find syscalls that take a long time, you need to
grep on the time shown at the /end/ of the line.
Both are useful, but time /between/
Thanks, the strace shows at least one low-hanging fruit for python
startup, which is that all the .pyc files are missing from the image.
This needs to be fixed in the ubuntu-core image build process.
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well, the -T makes it pretyt easy to grep for the bigger time hogs ...
see http://paste.ubuntu.com/23216260/ ... gettimeofday seems to consume
a lot, as well as loading yaml
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ogra@bbb:~$ time /var/snap/classic/common/classic/usr/bin/strace -ff -tt
console-conf --help >console-conf-help.strace 2>&1
real0m17.668s
user0m11.384s
sys 0m6.060s
...
http://paste.ubuntu.com/23216240/
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oh, sorry, I mis-read the straces -- can you please run with -tt, not
with -T, so that we see cumulative/real-time timestamps?
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Title:
console-co
sure, not actually much different from the former though ...
http://paste.ubuntu.com/23215975/
( i watched the prompt not coming back for ~20sec in both cases when i ran the
command)
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ht
Mind attaching that strace?
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Title:
console-conf on beaglebone takes unbearable long
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yes it was ... re-running it with time:
ogra@bbb:~$ time /var/snap/classic/common/classic/usr/bin/strace -ff -r
-T console-conf --help >console-conf-help.strace 2>&1
real0m16.882s
user0m11.256s
sys 0m5.412s
ogra@bbb:~$
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According to that strace, console-conf --help only took 0.02s? Was that
really running on the slow beaglebone?
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Title:
console-conf on beaglebone
and here is:
sudo strace -ff -r -T /usr/share/subiquity/console-conf-tui
http://paste.ubuntu.com/23215368/
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Title:
console-conf on beaglebone ta
here is the output of running:
strace -ff -r -T console-conf --help
http://paste.ubuntu.com/23215333/
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Title:
console-conf on beaglebone takes
also...
(beaglebone)
ogra@bbb:~$ time python3 -v -c "" 2>/dev/null
real0m1.968s
user0m1.048s
sys 0m0.368s
vs an x86 machine:
ogra@anubis:~$ time python3 -v -c "" 2>/dev/null
real0m0.027s
user0m0.024s
sys 0m0.000s
loading the interpreter alone, without any imports already
running it manually on a completely idling bbb it takes about 30 seconds until
i see the UI, watching top at that time the CPU is constantly saturated...
note that there is still a lot processes running in the background during boot
up though, where the saturated CPU will be acting a lot slower.
http://paste.ubuntu.com/23210646/ is /var/log/console-conf/subiquity-
debug.log
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Title:
console-conf on beaglebone takes unbearable long
To mana
Can you pastebin or upload or something the log at /var/log/console-conf
/subiquity-debug.log? Might help figuring out which bit is slow at
least.
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5-10 *minutes*? I timed it on my dragonboard and it was about 5 seconds.
I know the beaglebone is slow but it shouldn't be 60x slower than a
dragonboard. I'd love to know where the time is going, maybe probing is
really slow or something? Is it similarly slow if you run sudo
/usr/share/subiquity/co
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