192
Configuring kernel thread starvation detection
CAUTION:
Inappropriate configuration of kernel thread starvation detection can cause service problems or
system breakdown. Make sure you understand the impact of this configuration on your network
before you configure kernel thread starvation detection.
Starvation occurs when a thread is unable to access shared resources.
Kernel thread starvation detection enables the system to detect and report thread starvation. If a
thread is not executed within a specific interval, the system considers that a starvation has occurred,
and generates a starvation message.
Thread starvation does not impact system operation. A starved thread can automatically run when
certain conditions are met.
To configure kernel thread starvation detection:
Step Command
Remarks
1.
Enter system view.
system-view
N/A
2.
Enable kernel thread
starvation detection.
monitor kernel starvation enable
[
slot
slot-number
[
cpu
cpu-number
] ]
By default, the function is
disabled.
3.
(Optional.) Set the
interval for identifying a
kernel thread starvation.
monitor kernel starvation time interval
[
slot slot-number
[
cpu
cpu-number
] ]
The default is 120 seconds.
4.
(Optional.) Disable kernel
thread starvation
detection for a kernel
thread.
monitor kernel starvation
exclude-thread tid
[
slot slot-number
[
cpu
cpu-number
] ]
After enabled, kernel thread
starvation detection monitors
all kernel threads by default.
Displaying and maintaining kernel threads
Execute
display
commands in any view and
reset
commands in user view.
Task Command
Display kernel thread deadloop information.
display kernel deadloop show-number
[
offset
]
[
verbose
] [
slot
slot-number
[
cpu
cpu-number
] ]
Display kernel thread deadloop detection
configuration.
display kernel deadloop configuration
[
slot
slot-number
[
cpu
cpu-number
] ]
Display kernel thread exception information.
display kernel exception show-number
[
offset
]
[
verbose
]
[
slot
slot-number
[
cpu
cpu-number
] ]
Display kernel thread reboot information.
display kernel reboot show-number
[
offset
] [
verbose
]
[
slot
slot-number
[
cpu
cpu-number
] ]
Display kernel thread starvation information.
display kernel starvation show-number
[
offset
]
[
verbose
] [
slot
slot-number
[
cpu
cpu-number
] ]
Display kernel thread starvation detection
configuration.
display kernel starvation configuration
[
slot
slot-number
[
cpu
cpu-number
] ]
Clear kernel thread deadloop information.
reset kernel deadloop
[
slot
slot-number
[
cpu
cpu-number
] ]
Clear kernel thread exception information.
reset kernel exception
[
slot
slot-number
[
cpu
cpu-number
] ]
