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products:sbc:common:applications:watchdog

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products:sbc:common:applications:watchdog [2022/07/06 23:51]
frank ↷ Page moved from products:sbc:common:applications:gpio:watchdog to products:sbc:common:applications:watchdog 		products:sbc:common:applications:watchdog [2022/12/05 01:43] (current)
nick
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 ===== Introduction ===== ===== Introduction =====
  
-This document mainly introduces Watchdog. You will learn how to enable the watchdog and test.+This page introduces the internal Watchdog. You will learn how to enable the watchdog and test it.
  
-===== Enable Watchdog =====+===== Enable Internal Watchdog =====
  
 Watchdog is disabled by default, use the commands below to enable it. Watchdog is disabled by default, use the commands below to enable it.
  
 <tabbox Ubuntu 18.04>  <tabbox Ubuntu 18.04> 
-```sh +```shell 
-khadas@Khadas:~$ sudo ln -s  /lib/systemd/system/watchdog.service /etc/systemd/system/multi-user.target.wants/watchdog.service +sudo ln -s  /lib/systemd/system/watchdog.service /etc/systemd/system/multi-user.target.wants/watchdog.service 
-khadas@Khadas:~$ sudo systemctl enable watchdog.service +sudo systemctl enable watchdog.service 
-khadas@Khadas:~$ sudo systemctl start watchdog.service+sudo systemctl start watchdog.service
 ``` ```
  
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 <tabbox Ubuntu 20.04>  <tabbox Ubuntu 20.04> 
- +```shell 
-khadas@Khadas:~$ sudo systemctl enable watchdog.service +sudo systemctl enable watchdog.service 
-khadas@Khadas:~$ sudo systemctl start watchdog.service +sudo systemctl start watchdog.service 
 +```
 </tabbox> </tabbox>
  
 Check watchdog status: Check watchdog status:
  
-```sh+```shell
 khadas@Khadas:~$ systemctl status watchdog.service  khadas@Khadas:~$ systemctl status watchdog.service 
 ● watchdog.service - watchdog daemon ● watchdog.service - watchdog daemon
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 lines 1-21/21 (END)  lines 1-21/21 (END) 
 ``` ```
-===== Test Watchdog =====+===== Test Internal Watchdog =====
  
 ==== Set Watchdog Timeout ==== ==== Set Watchdog Timeout ====
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 Restart the watchdog service to take effect. Restart the watchdog service to take effect.
  
-```sh +```shell 
-$ sudo systemctl restart watchdog+sudo systemctl restart watchdog
 ``` ```
  
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 Trigger a Kernel crash. Trigger a Kernel crash.
  
-```sh +```shell 
-khadas@Khadas:~$ echo c | sudo tee /proc/sysrq-trigger +echo 0 | sudo tee /sys/module/kernel/parameters/panic 
 +echo c | sudo tee /proc/sysrq-trigger 
 ``` ```
  
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 You can also kill the watchdog daemon to prevent an automatic restart after a Kernel crash. You can also kill the watchdog daemon to prevent an automatic restart after a Kernel crash.
  
-```sh +```shell 
-khadas@Khadas:~$ sudo pkill -9 watchdog +$ sudo pkill -9 watchdog 
-khadas@Khadas:~$ sudo pkill -9 wd_keepalive +$ sudo pkill -9 wd_keepalive 
-khadas@Khadas:~$ +$ 
-khadas@Khadas:~$ +$ 
-khadas@Khadas:~$ G12B:BL:6e7c85:2a3b91;FEAT:E0F83180:402000;POC:F;RCY:0;EMMC:0;READ:0;0.+$ G12B:BL:6e7c85:2a3b91;FEAT:E0F83180:402000;POC:F;RCY:0;EMMC:0;READ:0;0.
 bl2_stage_init 0x01 bl2_stage_init 0x01
 bl2_stage_init 0x81 bl2_stage_init 0x81
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 If watchdog was setup successfully, the system will automatically reboot after the Kernel crash, in accordance with the timeout you have set above. If watchdog was setup successfully, the system will automatically reboot after the Kernel crash, in accordance with the timeout you have set above.
  
-===== Disable Watchdog =====+===== Disable Internal Watchdog =====
  
 Disable the Watchdog daemon. Disable the Watchdog daemon.
  
-```sh +```shell 
-khadas@Khadas:~$ sudo systemctl disable watchdog +sudo systemctl disable watchdog 
-khadas@Khadas:~$ sudo reboot+sudo reboot
 ``` ```
  
Last modified: 2022/07/06 23:51 by frank

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