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Usage guidelines
Inappropriate use of the command can cause service problems or system breakdown. Make sure
you understand the impact of the command on your network before you use it.
Kernel threads share resources in kernel space. If a kernel thread monopolizes the CPU for a long
time, other threads cannot run, resulting in a deadloop.
This command enables the device to detect deadloops. If a thread occupies the CPU regularly, the
device considers that a deadloop has occurred.
Examples
# Enable kernel thread deadloop detection.
<Sysname> system-view
[Sysname] monitor kernel deadloop enable
Related commands
display kernel deadloop
display kernel deadloop configuration
monitor kernel deadloop action
monitor kernel deadloop exclude-thread
monitor kernel deadloop time
monitor kernel deadloop exclude-thread
Use monitor kernel deadloop exclude-thread to disable kernel thread deadloop detection for a
kernel thread.
Use undo monitor kernel deadloop exclude-thread to enable kernel thread deadloop detection
for a kernel thread.
Syntax
monitor kernel deadloop exclude-thread tid [ slot slot-number [ cpu cpu-number ] ]
undo monitor kernel deadloop exclude-thread [ tid ] [ slot slot-number [ cpu cpu-number ] ]
Default
Kernel thread deadloop detection monitors all kernel threads.
Views
System view
Predefined user roles
network-admin
Parameters
tid: Specifies a kernel thread by its ID, in the range of 1 to 2147483647. If no kernel thread is
specified for the undo command, the default is restored.
slot slot-number: Specifies an IRF member device by its ID. If you do not specify this option, the
master device is specified.
cpu cpu-number: Specifies a CPU by its number.
Usage guidelines
Inappropriate use of the command can cause service problems or system breakdown. Make sure
you understand the impact of the command on your network before you use it.
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