preamble
Monitoring and managing system resources is an important task in our testing work.Python, as a powerful programming language, provides many libraries and tools to help implement system monitoring and management. One of the excellent choices is the psutil library, which makes it easy to get system information, monitor processes, and manage system resources. In this article, we will introduce how to use the psutil library to implement system monitoring and management, as well as some useful tips and examples.
What is the psutil library
psutil is a cross-platform Python library for obtaining information about system processes and system utilization (CPU, memory, disk, network, etc.). It provides a simple yet powerful API that makes it easy to get and operate system resources without having to write complex system calls or command line scripts.
Install the psutil library
We can use the pip command to install it with the following command:
pip install psutil
Once the installation is complete, you can import and use the psutil library in your Python scripts.
Basic Functions and Usage
Getting system information
Using psutil, you can easily get various information about your system, such as the number of CPUs, memory usage, disk partitions, and network connection status.
import psutil
# Get the number of logical CPU cores
print("CPU logical cores:", psutil.cpu_count())
# Get total memory and free memory
mem = psutil.virtual_memory()
print(f"total memory：{} bytes")
print(f"free memory：{} bytes")
# Get disk partition information
disk_partitions = psutil.disk_partitions()
for partition in disk_partitions:
print(f"disk partitioning：{}, mount point：{}")
# Get network connection information
connections = psutil.net_connections()
print("Number of network connections:", len(connections))
Monitoring process information
psutil can get a list of currently running processes, as well as detailed information about each process (e.g., PID, CPU utilization, memory usage, etc.).
# Get a list of all processes
processes = psutil.process_iter()
for process in processes:
print(f"stepPID：{}, name (of a thing)：{()}")
# Get detailed information about the specified process
pid = 1234 # Specify the PID of the process
process = (pid)
print("Process name:", ())
print("Process status:", ())
print("Processes taking CPU time:", process.cpu_times())
print("Process memory usage:", process.memory_info())
Management system resources
In addition to monitoring system resources, psutil can also implement some system resource management functions, such as terminating a specified process or querying the system startup time.
# Terminate the process with the specified PID
pid_to_terminate = 1234
process_to_terminate = (pid_to_terminate)
process_to_terminate.terminate()
# Get system startup time
boot_time = psutil.boot_time()
print("System startup time:", boot_time)
summarize
Through the introduction of this article, we have learned how to use the psutil library to realize the system monitoring and management. psutil provides rich and powerful features that can help you easily get system information, monitor processes and manage system resources.
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