How to solve the problem of high CPU and Sys usage in Linux systems

How to solve the problem of high CPU and Sys usage in Linux systems requires specific code examples

With the widespread application of Linux systems, sometimes we will encounter CPU And the problem of excessive Sys usage. This situation can cause the system to run slowly, affecting normal work and operation. This article will introduce some methods to solve the problem of high CPU and Sys usage, and provide some specific code examples.

1. Detect processes that occupy too high CPU and Sys resources

First, we need to detect which processes occupy too high CPU and Sys resources. We can use the top command to view the current process status of the system, including CPU and Sys usage. Enter the following command in the terminal:

top

This will list the processes that occupy the most resources in the current system. We can use this list to find which processes occupy excessive CPU and Sys resources.

2. Optimize processes that occupy too much CPU

Once we find processes that occupy too much CPU, we can try to optimize the performance of these processes to reduce their usage of system resources. The following are some commonly used optimization methods:

1. Use the nice command to adjust the process priority

The nice command can be used to adjust the priority of the process. Making it more resilient when competing for CPU resources. You can adjust the priority of the process through the following command:

nice -n 10 <command>

where -n 10 means adjusting the priority of the process to 10. You can adjust this value according to the actual situation.

2. Use the taskset command to bind a process to a specified CPU core

Sometimes you can bind a process that takes up too much CPU to a specific CPU core to avoid resource competition. This function can be achieved using the taskset command, for example:

taskset -c 0-3 <command>

This will bind the process to CPU cores 0 to 3, and the bound core range can be adjusted according to the actual situation.

3. Optimize processes that occupy too much Sys

Excessive Sys usage may be caused by frequent system calls, excessive IO operations, etc. The following are some ways to optimize Sys usage that is too high:

1. Reduce the number of system calls

You can optimize the code and reduce the number of system calls, thereby Reduce Sys usage. The number of system calls can be reduced by using methods such as caching and batch processing.

2. Optimize IO operations

If the reason for the high Sys usage is too many IO operations, you can consider optimizing the IO operations and reducing the number of IO operations. Or improve IO efficiency. You can use asynchronous IO, caching and other methods to optimize IO operations.

Summary

By detecting and optimizing processes that occupy too high CPU and Sys, we can effectively solve the problem of high CPU and Sys usage in Linux systems. The methods provided above are just some commonly used optimization methods. The actual situation may be different and need to be adjusted and optimized according to the specific situation. I hope the above content will help solve the problem of high CPU and Sys usage in Linux systems.

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