R0106-HP MSR Router Series Network Management and Monitoring Command Reference(V7)

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Usage guidelines
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. It outputs a deadloop message and reboots to remove the
deadloop.
Inappropriate use of this command can cause service problems or system breakdown. Make sure you
understand the impact of this command on your network before you use it.
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 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
MSR2000/MSR3000:
monitor kernel deadloop exclude-thread tid
undo monitor kernel deadloop exclude-thread [ tid ]
MSR4000:
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.