376
cpu cpu-number: Specifies a CPU by its number. (Centralized devices in IRF mode/distributed
devices in IRF or standalone mode.)
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.
The 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 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.
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
Centralized devices in standalone mode:
monitor kernel deadloop exclude-thread tid
undo monitor kernel deadloop exclude-thread [ tid ]
Distributed devices in standalone mode/centralized devices in IRF mode:
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 ] ]
Distributed devices in IRF mode:
monitor kernel deadloop exclude-thread tid [ chassis chassis-number slot slot-number [ cpu
cpu-number ] ]
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