H3C Technologies H3C S6300 Series Switches - Manual (Page 203)

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Monitoring and maintaining processes
H3C Comware V7 is a full-featured, modular, and scalable network operating system based on the Linux
kernel. Comware V7 software features run the following types of independent processes:
• User process—Runs in user space. Most Comware V7 software features run user processes. Each
process runs in an independent space so the failure of a process does not affect other processes.
The system automatically monitors user processes. Comware V7 supports preemptive
multithreading. A process can run multiple threads to support multiple activities. Whether a process
supports multithreading depends on the software implementation.
• Kernel thread—Runs in kernel space. A kernel thread executes kernel code. It has a higher security
level than a user process. If a kernel thread fails, the system breaks down. You can monitor the
running status of kernel threads.
Displaying and maintaining processes
Commands described in this section apply to both user processes and kernel threads. You can execute
these commands in any view.
The system identifies a process that consumes excessive memory or CPU resources as an anomaly source.
To display and maintain processes:
Task Command
Display memory usage. display memory [ slot slot-number ]
Display process state information. display process [ all | job job-id | name process-name ] [ slot slot-number ]
Display CPU usage for all
processes.
display process cpu [ slot slot-number ]
Monitor process running state. monitor process [ dumbtty ] [ iteration number ] [ slot slot-number ]
Monitor thread running state. monitor thread [ dumbtty ] [ iteration number ] [ slot slot-number ]
For detailed information about the display memory [ slot slot-number ] command, see Fundamentals
Command Reference.
Displaying and maintaining user processes
Execute display commands in any view and other commands in user view.
Task Command
Display log information for all user
processes.
display process log [ slot slot-number ]
Display memory usage for all user
processes.
display process memory [ slot slot-number ]