unexpected thermal throttling

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unexpected thermal throttling

Unread postby jobenvil » Mon Jun 11, 2018 3:49 am

Since last week I cannot use the OdroidXU4 anymore, which is reaching the thermal throttling point and therefore shutting down automatically the system. This will be OK if the system load or the temperature would be really high, but this is not the case. At the beginning I thougt that this could be caused be some unattended update, but later on I found out that this was not the case. Since I didn't touch the OdroidXU4 for long time I wonder why suddenly and without any logical reason is failing now.

I monitored the thermal throttling on the serial console:

Code: Select all
root@hiperborea:~# [  510.609001] thermal thermal_zone0: critical temperature reached(236 C),shutting down

The thermal throttling was not really following a logical temperature curve because I was monitoring the CPUs and they showed not such increase of the temperature:
Code: Select all
root@hiperborea:~/tools# uptime
 18:28:39 up 50 min,  1 user,  load average: 0,04, 0,05, 0,05
root@hiperborea:~/tools# ./several_temp_cpus.sh

Every 2,0s:  echo -n 'FREQ CPU 1: ' && cat /sys/dev...  Sun Jun 10 18:28:33 2018

FREQ CPU 1: 200000
FREQ CPU 2: 200000
FREQ CPU 3: 200000
FREQ CPU 4: 200000

FREQ CPU 5: 700000
FREQ CPU 6: 700000
FREQ CPU 7: 700000
FREQ CPU 8: 700000

TEMP CPU 0: 54000
TEMP CPU 1: 51000
TEMP CPU 2: 56000
TEMP CPU 3: 54000

TEMP GPU: 34000

COOLING DEV 0: 0
COOLING DEV 1: 0
COOLING DEV 2: 0

[ 3114.674454] thermal thermal_zone1: critical temperature reached(235 C),shutting down
[ 3114.681243] thermal thermal_zone0: critical temperature reached(236 C),shutting down
[ 3114.697864] thermal thermal_zone1: critical temperature reached(235 C),shutting down
[  OK  ] Stopped tar         Unmounting RPC Pipe File System...
[  OK  ] Stopped Clean PHP session files every 30 mins.
         Stopping User Manager for UID 0...
[  OK  ] Stopped target Sound Card.
[  OK  ] Stopped Daily apt upgrade and clean activities.


I also tested the OdroidXU4 with another new image without any load which corroborates that the temperature was not more than 60 °C. The OdroidXU4 keeps still shutting down. This means that some sensor inside the OdroidXU4 is giving wrong values, probably is damaged and therefore sending the wrong signal to the system. I also removed the fan and the heatsink and controlled the temperature on the Exynos chip manually. Puting on the system on powersave mode and other cpu-freq tunning doesn't help as well.

The OdroidXU4 was working since almost 2,5 years (Invoice HKI1601100146) properly with a Noctua Fan (NOCTUA NF-A4x10 5V) + heatsink. The headless server was used only for seafile-server and the load was really low and sporadically when compiling, the Noctua fan was working really nice not showing in any case a termal shutdown.

My question, how is possible to deactivate the thermal throttling mechanism in order to be able to continue using the OdroidXU4?

Code: Select all
root@hiperborea:~# uname -a
Linux hiperborea 4.9.21-g8abd6e9-dirty #1 SMP PREEMPT Sat Apr 8 20:31:35 CEST 2017 armv7l armv7l armv7l GNU/Linux
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Re: unexpected thermal throttling

Unread postby mad_ady » Mon Jun 11, 2018 4:34 am

Yes, there is a fix to ignore faulty temperature readings, but you need to upgrade to kernel 4.14.
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Re: unexpected thermal throttling

Unread postby jobenvil » Mon Jun 11, 2018 5:47 am

This would not be the main problem, but the OdroidXU4 will not pass the compilation process, since sometimes the shutdown appears after less than 20 minutes...
Any idea where I can read more about this fix?
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Re: unexpected thermal throttling

Unread postby rooted » Mon Jun 11, 2018 11:05 am

mad_ady wrote:Yes, there is a fix to ignore faulty temperature readings, but you need to upgrade to kernel 4.14.
I know about this issue and have seen the fix on github, but what is causing this problem and why are so many having it suddenly?

3.10.y also has this fix enabled

It states a broken TMU but why is this? Is it actually faulty hardware? What are the chances multiple people would have this happen at the same time.

jobenvil wrote:Any idea where I can read more about this fix?


https://github.com/hardkernel/linux/com ... c6e8017f9d

https://github.com/hardkernel/linux/com ... 922d6476f7

4.14.y

https://github.com/hardkernel/linux/blo ... _helpers.c

Same problem here :

https://forum.armbian.com/applications/ ... ched(228-C)
Last edited by rooted on Mon Jun 11, 2018 11:55 am, edited 2 times in total.
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Re: unexpected thermal throttling

Unread postby mad_ady » Mon Jun 11, 2018 11:48 am

You should be able to install the deb package for the kernel without compiling anything.

I think the problem is caused by old age/heat-cooling cycles of the cpu die where the sensor is. Usually such sensors rely on measuring voltage on a transistor (https://www.sensortips.com/featured/get ... ransistor/) and a transient problem can generate a wrong reading.
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Re: unexpected thermal throttling

Unread postby rooted » Mon Jun 11, 2018 11:58 am

@mad_ady Thanks for the information. I still find it hard to believe multiple people would have this issue at the same time though. I have two XU4 in 24/7 operation, one is quite old and no issue. The XU3 never had this issue that I have seen as well, it's even older.
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Re: unexpected thermal throttling

Unread postby phaseshifter » Mon Jun 11, 2018 3:07 pm

i have 2 things to say..
1: check your thermal compound has it become a cake of dried toast
best thing to remove the hold down pins is a "molex-pin" remover..it fits over those sink hold down`s perfect..
makes easy removal of the sink assy to just check...
2: try reverse power the board..it may not be a total cpu issue..
odroid N-1 16Gb emmc orange..
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Re: unexpected thermal throttling

Unread postby moon.linux » Mon Jun 11, 2018 5:53 pm

Actually early thermal sensor registration is broken with latest tmu back port.
Following patch https://patchwork.kernel.org/patch/10396327/ help resolve this issue.

Code: Select all
Welcome to Ubuntu 16.04.4 LTS (GNU/Linux 4.14.47-132 armv7l)

 * Documentation:  https://help.ubuntu.com
 * Management:     https://landscape.canonical.com
 * Support:        https://ubuntu.com/advantage

0 packages can be updated.
0 updates are security updates.

Last login: Mon Jun 11 02:13:04 2018 from 10.0.0.106
odroid@odroid:~$ dmesg | grep thermal
[    3.677796] thermal thermal_zone0: failed to read out thermal zone (-22)
[    3.683975] thermal thermal_zone1: failed to read out thermal zone (-22)
[    3.690665] thermal thermal_zone2: failed to read out thermal zone (-22)
[    3.697346] thermal thermal_zone3: failed to read out thermal zone (-22)
[    3.704048] thermal thermal_zone4: failed to read out thermal zone (-22)
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Re: unexpected thermal throttling

Unread postby jobenvil » Tue Jun 12, 2018 2:06 am

rooted wrote:It states a broken TMU but why is this? Is it actually faulty hardware? What are the chances multiple people would have this happen at the same time.


I suppose yes. Thank you for the links. thumbs up!

phaseshifter wrote:i have 2 things to say..
1: check your thermal compound has it become a cake of dried toast
best thing to remove the hold down pins is a "molex-pin" remover..it fits over those sink hold down`s perfect..
makes easy removal of the sink assy to just check...
2: try reverse power the board..it may not be a total cpu issue..


Indeed, this was my second intuition and I though it was the thermal compound, since I bought a Noctua (+ 40xgold-Heatsinks :D ) on Oct. 2016, could be the reason. Unfortunately the thermal compound was elastic and still sticking in my fingers. I reused the thermal compound from HK with the new heatsink since they were delivered with thermal paste and not possible to use in the OdroidXU4.

Since I bought the new power adapter with 30W 5V/6A on October 2016 as well, I reverted to the Hardkernel one, but exactly the same behavior.

I will order a new one OdroidXU4 and wait until a tested patched 4.14 kernel appears. To have a spare board is not a bad idea :D :D :D

hi, wait, @moon.linux may I download your 4.14.47 kernel?


Code: Select all
Jun  1 13:43:47 hiperborea kernel: [68578.803083] thermal thermal_zone1: critical temperature reached(235 C),shutting down
Jun  1 13:43:47 hiperborea kernel: [68578.816909] thermal thermal_zone0: critical temperature reached(236 C),shutting down
Jun  2 05:14:07 hiperborea kernel: [42770.590203] thermal thermal_zone0: critical temperature reached(236 C),shutting down
Jun  2 05:14:07 hiperborea kernel: [42770.604294] thermal thermal_zone1: critical temperature reached(235 C),shutting down
Jun  2 12:05:23 hiperborea kernel: [ 8338.562630] thermal thermal_zone0: critical temperature reached(236 C),shutting down
Jun  2 12:05:23 hiperborea kernel: [ 8338.572993] thermal thermal_zone1: critical temperature reached(235 C),shutting down
Jun  2 20:25:48 hiperborea kernel: [16969.270237] thermal thermal_zone0: critical temperature reached(236 C),shutting down
Jun  5 20:02:16 hiperborea kernel: [ 2493.070831] thermal thermal_zone1: critical temperature reached(235 C),shutting down
Jun  5 20:02:16 hiperborea kernel: [ 2493.088075] thermal thermal_zone0: critical temperature reached(236 C),shutting down
Jun  6 02:39:01 hiperborea kernel: [14437.860398] thermal thermal_zone1: critical temperature reached(235 C),shutting down
Jun  6 02:39:01 hiperborea kernel: [14437.870509] thermal thermal_zone0: critical temperature reached(236 C),shutting down
Jun  6 02:39:01 hiperborea kernel: [14437.930372] thermal thermal_zone0: critical temperature reached(236 C),shutting down
Jun  6 11:14:43 hiperborea kernel: [12321.602786] thermal thermal_zone1: critical temperature reached(235 C),shutting down
Jun  6 11:14:43 hiperborea kernel: [12321.619344] thermal thermal_zone0: critical temperature reached(236 C),shutting down
Jun  8 17:21:32 hiperborea kernel: [  342.765579] thermal thermal_zone1: critical temperature reached(235 C),shutting down
Jun  8 17:21:32 hiperborea kernel: [  342.779564] thermal thermal_zone0: critical temperature reached(236 C),shutting down
Jun  8 19:06:03 hiperborea kernel: [ 5894.556807] thermal thermal_zone0: critical temperature reached(236 C),shutting down
Jun  8 19:06:03 hiperborea kernel: [ 5894.571005] thermal thermal_zone1: critical temperature reached(235 C),shutting down
Jun 10 11:43:03 hiperborea kernel: [ 4882.190761] thermal thermal_zone0: critical temperature reached(236 C),shutting down
Jun 10 11:43:03 hiperborea kernel: [ 4882.201394] thermal thermal_zone1: critical temperature reached(235 C),shutting down
Jun 10 12:35:30 hiperborea kernel: [ 3092.951975] thermal thermal_zone1: critical temperature reached(235 C),shutting down
Jun 10 12:35:30 hiperborea kernel: [ 3092.958996] thermal thermal_zone0: critical temperature reached(236 C),shutting down
Jun 10 12:35:30 hiperborea kernel: [ 3092.975646] thermal thermal_zone1: critical temperature reached(235 C),shutting down
Jun 10 12:35:30 hiperborea kernel: [ 3092.982303] thermal thermal_zone0: critical temperature reached(236 C),shutting down
Jun 10 14:26:48 hiperborea kernel: [ 4948.864648] thermal thermal_zone1: critical temperature reached(235 C),shutting down
Jun 10 14:26:48 hiperborea kernel: [ 4948.885146] thermal thermal_zone0: critical temperature reached(236 C),shutting down
Jun 10 16:04:18 hiperborea kernel: [ 1519.801031] thermal thermal_zone0: critical temperature reached(236 C),shutting down
Jun 10 16:04:18 hiperborea kernel: [ 1519.807827] thermal thermal_zone1: critical temperature reached(235 C),shutting down
Jun 10 16:04:18 hiperborea kernel: [ 1519.824765] thermal thermal_zone0: critical temperature reached(236 C),shutting down
Jun 10 16:04:18 hiperborea kernel: [ 1519.831266] thermal thermal_zone1: critical temperature reached(235 C),shutting down
Jun 10 16:27:47 hiperborea kernel: [   14.500602] thermal thermal_zone0: critical temperature reached(236 C),shutting down
Jun 10 16:27:47 hiperborea kernel: [   14.512845] thermal thermal_zone1: critical temperature reached(235 C),shutting down
Jun 10 18:30:15 hiperborea kernel: [ 3114.674454] thermal thermal_zone1: critical temperature reached(235 C),shutting down
Jun 10 18:30:15 hiperborea kernel: [ 3114.681243] thermal thermal_zone0: critical temperature reached(236 C),shutting down
Jun 10 18:30:15 hiperborea kernel: [ 3114.697864] thermal thermal_zone1: critical temperature reached(235 C),shutting down
Jun 10 19:40:16 hiperborea kernel: [  328.902162] thermal thermal_zone0: critical temperature reached(236 C),shutting down
Jun 10 19:40:17 hiperborea kernel: [  328.925681] thermal thermal_zone1: critical temperature reached(201 C),shutting down
May 21 01:36:41 hiperborea kernel: [2544787.349006] thermal thermal_zone1: critical temperature reached(235 C),shutting down
May 21 01:36:41 hiperborea kernel: [2544787.372431] thermal thermal_zone0: critical temperature reached(236 C),shutting down
May 23 00:42:12 hiperborea kernel: [17908.116834] thermal thermal_zone0: critical temperature reached(236 C),shutting down
May 23 00:42:12 hiperborea kernel: [17908.127400] thermal thermal_zone1: critical temperature reached(235 C),shutting down
May 23 00:42:12 hiperborea kernel: [17908.140361] thermal thermal_zone0: critical temperature reached(236 C),shutting down
May 23 00:42:12 hiperborea kernel: [17908.146816] thermal thermal_zone1: critical temperature reached(235 C),shutting down
May 23 00:42:12 hiperborea kernel: [17908.154544] thermal thermal_zone0: critical temperature reached(236 C),shutting down
May 26 06:18:50 hiperborea kernel: [32457.322599] thermal thermal_zone1: critical temperature reached(235 C),shutting down
May 26 20:23:57 hiperborea kernel: [  333.849198] thermal thermal_zone1: critical temperature reached(235 C),shutting down
May 26 20:23:57 hiperborea kernel: [  333.886740] thermal thermal_zone0: critical temperature reached(236 C),shutting down
May 27 19:39:56 hiperborea kernel: [ 3404.229469] thermal thermal_zone0: critical temperature reached(236 C),shutting down
May 27 19:39:56 hiperborea kernel: [ 3404.236279] thermal thermal_zone1: critical temperature reached(235 C),shutting down
May 29 20:37:19 hiperborea kernel: [  530.498828] thermal thermal_zone0: critical temperature reached(236 C),shutting down
May 29 20:37:19 hiperborea kernel: [  530.518646] thermal thermal_zone1: critical temperature reached(235 C),shutting down
May 29 20:37:19 hiperborea kernel: [  530.541810] thermal thermal_zone0: critical temperature reached(236 C),shutting down
May 30 01:09:11 hiperborea kernel: [15394.207535] thermal thermal_zone0: critical temperature reached(236 C),shutting down
May 30 01:09:11 hiperborea kernel: [15394.214453] thermal thermal_zone1: critical temperature reached(235 C),shutting down
May 30 07:16:10 hiperborea kernel: [  650.360960] thermal thermal_zone1: critical temperature reached(235 C),shutting down
May 30 07:16:10 hiperborea kernel: [  650.380052] thermal thermal_zone0: critical temperature reached(236 C),shutting down
May 30 21:33:48 hiperborea kernel: [  611.219284] thermal thermal_zone0: critical temperature reached(236 C),shutting down
May 30 21:33:48 hiperborea kernel: [  611.226217] thermal thermal_zone1: critical temperature reached(235 C),shutting down
May 30 21:33:48 hiperborea kernel: [  611.276702] thermal thermal_zone1: critical temperature reached(201 C),shutting down
May 30 21:33:48 hiperborea kernel: [  611.306443] thermal thermal_zone1: critical temperature reached(235 C),shutting down
May 30 21:33:48 hiperborea kernel: [  611.336261] thermal thermal_zone1: critical temperature reached(203 C),shutting down
May 30 21:33:48 hiperborea kernel: [  611.372002] thermal thermal_zone1: critical temperature reached(203 C),shutting down
May 30 21:33:48 hiperborea kernel: [  611.392131] thermal thermal_zone0: critical temperature reached(236 C),shutting down
May 30 21:33:48 hiperborea kernel: [  611.410014] thermal thermal_zone0: critical temperature reached(236 C),shutting down
May 30 21:33:48 hiperborea kernel: [  611.433900] thermal thermal_zone0: critical temperature reached(236 C),shutting down
May 30 21:33:48 hiperborea kernel: [  611.630613] thermal thermal_zone1: critical temperature reached(235 C),shutting down
May 30 21:33:48 hiperborea kernel: [  611.648649] thermal thermal_zone0: critical temperature reached(236 C),shutting down
May 30 21:33:48 hiperborea kernel: [  611.678423] thermal thermal_zone0: critical temperature reached(236 C),shutting down
May 30 21:33:48 hiperborea kernel: [  611.694185] thermal thermal_zone1: critical temperature reached(201 C),shutting down
May 30 21:33:48 hiperborea kernel: [  611.724012] thermal thermal_zone1: critical temperature reached(235 C),shutting down
May 30 21:33:48 hiperborea kernel: [  611.731459] thermal thermal_zone0: critical temperature reached(236 C),shutting down
May 30 21:33:48 hiperborea kernel: [  611.789555] thermal thermal_zone1: critical temperature reached(201 C),shutting down
May 30 21:33:48 hiperborea kernel: [  611.807431] thermal thermal_zone1: critical temperature reached(201 C),shutting down
May 30 21:33:48 hiperborea kernel: [  611.831384] thermal thermal_zone1: critical temperature reached(235 C),shutting down
May 30 21:33:48 hiperborea kernel: [  611.851441] thermal thermal_zone0: critical temperature reached(236 C),shutting down
May 30 21:33:48 hiperborea kernel: [  611.932683] thermal thermal_zone1: critical temperature reached(235 C),shutting down
May 30 21:33:48 hiperborea kernel: [  611.939439] thermal thermal_zone0: critical temperature reached(236 C),shutting down
May 30 21:33:48 hiperborea kernel: [  611.980536] thermal thermal_zone1: critical temperature reached(203 C),shutting down
May 30 21:33:48 hiperborea kernel: [  611.998299] thermal thermal_zone1: critical temperature reached(201 C),shutting down
May 30 21:33:48 hiperborea kernel: [  612.012432] thermal thermal_zone0: critical temperature reached(236 C),shutting down
May 30 21:33:48 hiperborea kernel: [  612.019515] thermal thermal_zone1: critical temperature reached(235 C),shutting down
May 30 21:33:48 hiperborea kernel: [  612.034120] thermal thermal_zone1: critical temperature reached(235 C),shutting down
May 30 21:33:48 hiperborea kernel: [  612.041005] thermal thermal_zone0: critical temperature reached(236 C),shutting down
May 30 21:33:48 hiperborea kernel: [  612.065542] thermal thermal_zone0: critical temperature reached(236 C),shutting down
May 30 21:33:48 hiperborea kernel: [  612.123508] thermal thermal_zone1: critical temperature reached(235 C),shutting down
May 30 21:33:49 hiperborea kernel: [  612.167451] thermal thermal_zone0: critical temperature reached(236 C),shutting down
May 30 21:33:49 hiperborea kernel: [  612.191264] thermal thermal_zone0: critical temperature reached(236 C),shutting down
May 30 21:33:49 hiperborea kernel: [  612.198457] thermal thermal_zone1: critical temperature reached(201 C),shutting down
May 30 21:33:49 hiperborea kernel: [  612.213091] thermal thermal_zone1: critical temperature reached(235 C),shutting down
May 30 21:33:49 hiperborea kernel: [  612.220162] thermal thermal_zone0: critical temperature reached(236 C),shutting down
May 30 21:33:49 hiperborea kernel: [  612.421894] thermal thermal_zone1: critical temperature reached(201 C),shutting down
May 31 09:23:56 hiperborea kernel: [  408.748815] thermal thermal_zone0: critical temperature reached(236 C),shutting down
May 31 09:23:56 hiperborea kernel: [  408.758231] thermal thermal_zone1: critical temperature reached(235 C),shutting down
May 31 09:23:56 hiperborea kernel: [  408.778577] thermal thermal_zone1: critical temperature reached(235 C),shutting down
May 31 09:23:56 hiperborea kernel: [  408.800169] thermal thermal_zone1: critical temperature reached(235 C),shutting down
May 31 09:23:56 hiperborea kernel: [  408.806797] thermal thermal_zone0: critical temperature reached(236 C),shutting down
May 31 09:23:56 hiperborea kernel: [  408.829027] thermal thermal_zone0: critical temperature reached(236 C),shutting down
May 31 09:23:56 hiperborea kernel: [  408.839908] thermal thermal_zone1: critical temperature reached(235 C),shutting down
May 31 09:23:56 hiperborea kernel: [  408.895613] thermal thermal_zone1: critical temperature reached(203 C),shutting down
May 31 09:23:57 hiperborea kernel: [  409.146077] thermal thermal_zone1: critical temperature reached(235 C),shutting down
May 31 09:23:57 hiperborea kernel: [  409.156570] thermal thermal_zone0: critical temperature reached(236 C),shutting down
May 31 09:23:57 hiperborea kernel: [  409.169929] thermal thermal_zone1: critical temperature reached(235 C),shutting down
May 31 09:23:57 hiperborea kernel: [  409.178077] thermal thermal_zone0: critical temperature reached(236 C),shutting down
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Re: unexpected thermal throttling

Unread postby odroid » Tue Jun 12, 2018 3:55 pm

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Re: unexpected thermal throttling

Unread postby jobenvil » Wed Jun 13, 2018 1:25 am

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Re: unexpected thermal throttling

Unread postby rooted » Wed Jun 13, 2018 1:30 am

jobenvil wrote:may I use this other one?

http://deb.odroid.in/5422-s/pool/main/l ... _armhf.deb
Should work.
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Re: unexpected thermal throttling

Unread postby jobenvil » Wed Jun 13, 2018 3:29 am

that was all folks...

Code: Select all
root@hiperborea ~ # ./powersave
"powersave"
"powersave"
"powersave"
"powersave"
"powersave"
"powersave"
"powersave"
"powersave"
root@hiperborea ~ # dpkg -i --force-all linux-image-4.14.47-132_20180603_armhf.deb
Vormals nicht ausgewähltes Paket linux-image-4.14.47-132 wird gewählt.
(Lese Datenbank ... 115930 Dateien und Verzeichnisse sind derzeit installiert.)
Vorbereitung zum Entpacken von linux-image-4.14.47-132_20180603_armhf.deb ...

──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────

Session stopped
    - Press <return> to exit tab
    - Press R to restart session
    - Press S to save terminal output to file

Server unexpectedly closed network connection


:evil: :evil: :evil:
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Re: unexpected thermal throttling

Unread postby mad_ady » Wed Jun 13, 2018 4:34 am

I know it looks bad, but you can still recover from that. Connect the emmc/sd to a linux pc, mount both partitions and navigate to part2/var/cache/apt/packages and locate the linux-image package. Use mc to look inside and enter the cpio archive inside. From here you can extract kernel/initrd and place them in part1/, and /lib/modules and place them in part2/lib/modules.
It should reboot with the new kernel.
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Re: unexpected thermal throttling

Unread postby rooted » Wed Jun 13, 2018 7:00 am

No one said use force all, I would have told you to backup boot first.
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