Analyzing a Kernel Profile

Document Information

Preface

1. Overview of the Performance Analyzer

2. Performance Data

3. Collecting Performance Data

4. The Performance Analyzer Tool

5. The er_print Command Line Performance Analysis Tool

6. Understanding the Performance Analyzer and Its Data

7. Understanding Annotated Source and Disassembly Data

8. Manipulating Experiments

9. Kernel Profiling

Kernel Experiments

Setting Up Your System for Kernel Profiling

Running the er_kernel Utility

Profiling the Kernel

Profiling Under Load

Profiling the Kernel and Load Together

Profiling a Specific Process or Kernel Thread

Analyzing a Kernel Profile

Index

A few of the recorded fields in kernel experiments have a different meaning from the same fields in user-mode experiments. A user-mode experiment contains data for a single process ID only; a kernel experiment has data that may apply to many different process IDs. To better present that information, some of the field labels in the Analyzer have different meanings in the two types of experiments, as shown in the following table.

Table 9-1 Field Label Meanings for Kernel Experiments in the Analyzer

Analyzer Label	Meaning in User-mode Experiments	Meaning in Kernel Experiments
LWP	User process LWP ID	Process PID; 0 for kernel threads
Thread	Thread ID within process	Kernel TID; kernel DID for kernel threads

For example, in an kernel experiment, if you want to filter only a few process IDs, enter the PIDs of interest in the LWP filter field in the Filter Data dialog box.

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	Oracle Solaris Studio 12.2: Performance Analyzer