Performance

What is Performance Engineering

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Using systemtap to analyze latency of the kernel module function

Using systemtap to analyze latency of the kernel module function

In this post, we continue to explore how to use SystemTap to analyze the latency of the kernel module function. In the following example, we want to analyze the latency of the function "nfsd_vfs_write" from the kernel module "nfsd". Deploy the SystemTap packages Refer to this post to

Getting started with systemtap for Linux system profiling

Getting started with systemtap for Linux system profiling

Intro to SystemTap SystemTap is a tracing and probing tool that allows users to study and monitor the activities of the operating system (particularly, the kernel) in fine detail. It provides information similar to the output of tools like netstat, ps, top, and iostat; however, SystemTap is designed to provide

Using ftrace to analyze latency of the kernel module function

Using ftrace to analyze latency of the kernel module function

In this example, we study the latency of the function "nfsd_vfs_write" from kernel module "nfsd". ftrace configuration The following ftrace options are used in this example. There are 8 nfsd processes to be traced. * current_tracer: function_graph * pids: 3591 3592 3593 3594 3595 3596 3597 3598 * filters: