What is psutil.cpu_percent in Python?
What is the psutil module?
psutil (Python system and process utilities) is a Python package that retrieves information on ongoing processes and system usage (CPU, memory, storage, network, and sensors). It is mostly used for system monitoring, profiling, restricting process resources, and process management.
The module can be installed via pip as follows:
pip install psutil
The cpu_percent method
The cpu_percent method is used to return the current system-wide CPU utilization as a percentage.
Syntax
cpu_percent(interval=None, percpu=False)
The method takes two parameters.
-
interval: This parameter represents the time interval over which the method calculates the CPU usage. Givinginterval > 0results in a blocking call where the CPU usage is calculated. -
percpu: This is a boolean parameter. When set totrue, the method returns a list indicating the utilization of each CPU in the system.
Example
import psutilprint("psutil.cpu_percent(interval=2) = %s" % (psutil.cpu_percent(interval=2),))print("psutil.cpu_percent(interval=2) = %s" % (psutil.cpu_percent(interval=2),))print("The number of CPUs is : %s" % (psutil.cpu_count(), ))print("The CPU utilization of all the CPUs is: %s" % (psutil.cpu_percent(interval=2, percpu=True), ))
Explanation
- Line 1: We import the
psutilmodule. - Line 3: We retrieve the CPU utilization using the
cpu_percent(), with the interval as 2 seconds. - Line 5: We retrieve the CPU utilization using the
cpu_percent()with interval as 2 seconds. - Line 7: We get the number of CPUs using the psutil.cpu_count() method.
- Line 9: We retrieve the utilization of every CPU by invoking the
cpu_percent()method with thepercpuparameter astrue. The method returns a list. The first value of the list corresponds to the first CPU utilization, the second value corresponds to the second CPU utilization, and so on.
