Kernel

Robotics & Edge Computing Jetson & Embedded Systems Jetson Xavier NX
1

nvidia@ubuntu:~$ grep -i “oom|kill” /var/log/kern.log
Apr 14 10:29:18 ubuntu kernel: [ 14.225298] psci: CPU4 killed (polled 0 ms)
Apr 14 10:29:18 ubuntu kernel: [ 14.284741] psci: CPU5 killed (polled 0 ms)
Apr 14 15:22:00 ubuntu kernel: [ 15.205118] psci: CPU4 killed (polled 0 ms)
Apr 14 15:22:00 ubuntu kernel: [ 15.265133] psci: CPU5 killed (polled 0 ms)
Apr 14 15:56:25 ubuntu kernel: [ 15.389226] psci: CPU4 killed (polled 0 ms)
Apr 14 15:56:25 ubuntu kernel: [ 15.444942] psci: CPU5 killed (polled 0 ms)
Apr 14 16:01:22 ubuntu kernel: [ 14.811766] psci: CPU4 killed (polled 0 ms)
Apr 14 16:01:22 ubuntu kernel: [ 14.872423] psci: CPU5 killed (polled 0 ms)
Apr 14 16:14:24 ubuntu kernel: [ 19.243296] psci: CPU4 killed (polled 0 ms)
Apr 14 16:14:24 ubuntu kernel: [ 19.296279] psci: CPU5 killed (polled 0 ms)
Apr 14 16:18:43 ubuntu kernel: [ 24.973296] psci: CPU4 killed (polled 0 ms)
Apr 14 16:18:43 ubuntu kernel: [ 25.022781] psci: CPU5 killed (polled 0 ms)
Apr 14 16:29:10 ubuntu kernel: [ 15.038780] psci: CPU4 killed (polled 0 ms)
Apr 14 16:29:10 ubuntu kernel: [ 15.090693] psci: CPU5 killed (polled 0 ms)
Apr 14 16:44:07 ubuntu kernel: [ 14.930350] psci: CPU4 killed (polled 0 ms)
Apr 14 16:44:07 ubuntu kernel: [ 14.974443] psci: CPU5 killed (polled 0 ms)
Apr 14 17:07:31 ubuntu kernel: [ 15.021774] psci: CPU4 killed (polled 0 ms)
Apr 14 17:07:31 ubuntu kernel: [ 15.077573] psci: CPU5 killed (polled 0 ms)
Apr 14 17:14:15 ubuntu kernel: [ 15.113987] psci: CPU4 killed (polled 0 ms)
Apr 14 17:14:15 ubuntu kernel: [ 15.161764] psci: CPU5 killed (polled 0 ms)
Apr 15 09:24:57 ubuntu kernel: [ 15.052045] psci: CPU4 killed (polled 0 ms)
Apr 15 09:24:57 ubuntu kernel: [ 15.106153] psci: CPU5 killed (polled 0 ms)
Binary file /var/log/kern.log matches
您好NV！ nx设备，jetapck5.1.5，这段日志的含义什么？

5

Is this a custom board or NV devkit?

What power mode are you using there?

6

custom board，mode 10W DESKTOP

7

10W will disable 2 cpus from the list so it could be normal.

8

如果电源模式改成mode 10w 2core，kern.log日志里会显示disable 4cpus信息吗？

9

yes, it should have.

10

我切换成了10w core模式，日志里没有相关的信息

Apr 14 10:29:18 ubuntu kernel: [   14.225298] psci: CPU4 killed (polled 0 ms)
Apr 14 10:29:18 ubuntu kernel: [   14.284741] psci: CPU5 killed (polled 0 ms)
Apr 14 15:22:00 ubuntu kernel: [   15.205118] psci: CPU4 killed (polled 0 ms)
Apr 14 15:22:00 ubuntu kernel: [   15.265133] psci: CPU5 killed (polled 0 ms)
Apr 14 15:56:25 ubuntu kernel: [   15.389226] psci: CPU4 killed (polled 0 ms)
Apr 14 15:56:25 ubuntu kernel: [   15.444942] psci: CPU5 killed (polled 0 ms)
Apr 14 16:01:22 ubuntu kernel: [   14.811766] psci: CPU4 killed (polled 0 ms)
Apr 14 16:01:22 ubuntu kernel: [   14.872423] psci: CPU5 killed (polled 0 ms)
Apr 14 16:14:24 ubuntu kernel: [   19.243296] psci: CPU4 killed (polled 0 ms)
Apr 14 16:14:24 ubuntu kernel: [   19.296279] psci: CPU5 killed (polled 0 ms)
Apr 14 16:18:43 ubuntu kernel: [   24.973296] psci: CPU4 killed (polled 0 ms)
Apr 14 16:18:43 ubuntu kernel: [   25.022781] psci: CPU5 killed (polled 0 ms)
Apr 14 16:29:10 ubuntu kernel: [   15.038780] psci: CPU4 killed (polled 0 ms)
Apr 14 16:29:10 ubuntu kernel: [   15.090693] psci: CPU5 killed (polled 0 ms)
Apr 14 16:44:07 ubuntu kernel: [   14.930350] psci: CPU4 killed (polled 0 ms)
Apr 14 16:44:07 ubuntu kernel: [   14.974443] psci: CPU5 killed (polled 0 ms)
Apr 14 17:07:31 ubuntu kernel: [   15.021774] psci: CPU4 killed (polled 0 ms)
Apr 14 17:07:31 ubuntu kernel: [   15.077573] psci: CPU5 killed (polled 0 ms)
Apr 14 17:14:15 ubuntu kernel: [   15.113987] psci: CPU4 killed (polled 0 ms)
Apr 14 17:14:15 ubuntu kernel: [   15.161764] psci: CPU5 killed (polled 0 ms)
Apr 15 09:24:57 ubuntu kernel: [   15.052045] psci: CPU4 killed (polled 0 ms)
Apr 15 09:24:57 ubuntu kernel: [   15.106153] psci: CPU5 killed (polled 0 ms)
Binary file /var/log/kern.log matches
nvidia@ubuntu:~$
11

What is the result of tegrastats now?

12

现在的查询结果如下

nvidia@ubuntu:~$ grep -i "oom\|kill" /var/log/kern.log
Apr 14 10:29:18 ubuntu kernel: [   14.225298] psci: CPU4 killed (polled 0 ms)
Apr 14 10:29:18 ubuntu kernel: [   14.284741] psci: CPU5 killed (polled 0 ms)
Apr 14 15:22:00 ubuntu kernel: [   15.205118] psci: CPU4 killed (polled 0 ms)
Apr 14 15:22:00 ubuntu kernel: [   15.265133] psci: CPU5 killed (polled 0 ms)
Apr 14 15:56:25 ubuntu kernel: [   15.389226] psci: CPU4 killed (polled 0 ms)
Apr 14 15:56:25 ubuntu kernel: [   15.444942] psci: CPU5 killed (polled 0 ms)
Apr 14 16:01:22 ubuntu kernel: [   14.811766] psci: CPU4 killed (polled 0 ms)
Apr 14 16:01:22 ubuntu kernel: [   14.872423] psci: CPU5 killed (polled 0 ms)
Apr 14 16:14:24 ubuntu kernel: [   19.243296] psci: CPU4 killed (polled 0 ms)
Apr 14 16:14:24 ubuntu kernel: [   19.296279] psci: CPU5 killed (polled 0 ms)
Apr 14 16:18:43 ubuntu kernel: [   24.973296] psci: CPU4 killed (polled 0 ms)
Apr 14 16:18:43 ubuntu kernel: [   25.022781] psci: CPU5 killed (polled 0 ms)
Apr 14 16:29:10 ubuntu kernel: [   15.038780] psci: CPU4 killed (polled 0 ms)
Apr 14 16:29:10 ubuntu kernel: [   15.090693] psci: CPU5 killed (polled 0 ms)
Apr 14 16:44:07 ubuntu kernel: [   14.930350] psci: CPU4 killed (polled 0 ms)
Apr 14 16:44:07 ubuntu kernel: [   14.974443] psci: CPU5 killed (polled 0 ms)
Apr 14 17:07:31 ubuntu kernel: [   15.021774] psci: CPU4 killed (polled 0 ms)
Apr 14 17:07:31 ubuntu kernel: [   15.077573] psci: CPU5 killed (polled 0 ms)
Apr 14 17:14:15 ubuntu kernel: [   15.113987] psci: CPU4 killed (polled 0 ms)
Apr 14 17:14:15 ubuntu kernel: [   15.161764] psci: CPU5 killed (polled 0 ms)
Apr 15 09:24:57 ubuntu kernel: [   15.052045] psci: CPU4 killed (polled 0 ms)
Apr 15 09:24:57 ubuntu kernel: [   15.106153] psci: CPU5 killed (polled 0 ms)
Binary file /var/log/kern.log matches
nvidia@ubuntu:~$ ^C
nvidia@ubuntu:~$
13

…so what is the result of tegrastats now?

14

kern.log (1.5 MB)

nvidia@ubuntu:/var/log$ tegrastats 
04-16-2025 14:35:40 RAM 2003/6833MB (lfb 833x4MB) SWAP 0/3417MB (cached 0MB) CPU [8%@1497,7%@1497,off,off,off,off] EMC_FREQ 0% GR3D_FREQ 0% AUX@34C CPU@35C thermal@34.15C AO@34.5C GPU@33.5C PMIC@50C
04-16-2025 14:35:41 RAM 2003/6833MB (lfb 833x4MB) SWAP 0/3417MB (cached 0MB) CPU [10%@1190,9%@1497,off,off,off,off] EMC_FREQ 0% GR3D_FREQ 0% AUX@34C CPU@35C thermal@34.15C AO@34.5C GPU@33.5C PMIC@50C
04-16-2025 14:35:42 RAM 2003/6833MB (lfb 833x4MB) SWAP 0/3417MB (cached 0MB) CPU [8%@1190,8%@1497,off,off,off,off] EMC_FREQ 0% GR3D_FREQ 0% AUX@34C CPU@35C thermal@34.15C AO@35C GPU@33.5C PMIC@50C
04-16-2025 14:35:43 RAM 2003/6833MB (lfb 833x4MB) SWAP 0/3417MB (cached 0MB) CPU [5%@1497,8%@1497,off,off,off,off] EMC_FREQ 0% GR3D_FREQ 0% AUX@34C CPU@35C thermal@34.3C AO@35C GPU@34C PMIC@50C
04-16-2025 14:35:44 RAM 2003/6833MB (lfb 833x4MB) SWAP 0/3417MB (cached 0MB) CPU [12%@1190,5%@1190,off,off,off,off] EMC_FREQ 0% GR3D_FREQ 0% AUX@34C CPU@35C thermal@34.3C AO@34.5C GPU@34C PMIC@50C
^C
nvidia@ubuntu:/var/log$
15

Apr 16 14:24:38 ubuntu kernel: [ 1759.917869] CPU2: shutdown
Apr 16 14:24:38 ubuntu kernel: [ 1759.918053] psci: CPU2 killed (polled 0 ms)
Apr 16 14:24:38 ubuntu kernel: [ 1759.961455] CPU3: shutdown
Apr 16 14:24:38 ubuntu kernel: [ 1759.961583] psci: CPU3 killed (polled 0 ms)

log在這…

16

那个检索的命令，没有把这两条信息检索出来，

17 
nvidia@ubuntu:/var/log$ sudo dmesg | grep NVRM
[   26.539703] NVRM: No NVIDIA GPU found.
[   63.844005] NVRM: No NVIDIA GPU found.
[   92.091366] NVRM: No NVIDIA GPU found.
这个查询结果正常吗？
18

It is normal.

19

这块能给解释下吗，为什么没找到gpu信息，

20

Rel-35 Xavier 並沒有在使用NVRM這個driver. 但由於跟Orin共用. 所以driver還是會probe.

GPU還是正常使用. 只是不是給這driver控制.

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