CPU profiling
Dynatrace offers the following capabilities that allow you to perform enhanced code-level CPU analysis:
Gain insights into processes and process group hotspots
Access background activity, service activity, single request executions, and specific requests
Break down and filter data by code execution, network I/O, disk I/O, lock time, and wait times over times
Break down and filter data by API over time
View forward stack traces and hotspots with reverse stack traces
Gain support for Java, .NET, .PHP, .Node.js, and Golang
To perform code-level CPU analysis:
- In the Dynatrace menu, go to Profiling and optimization and select Continuous CPU profiling.
Select the process group that contains the process that you want to analyze.
- Find the process you want to analyze and, in the Actions column, select the corresponding Method hotspots icon to view the Method hotspots page.
Analysis options
To analyze a process group, remove the filters.
The color coding of the pie chart, the area chart, and the bars in the code-level stack facilitate code-level diagnostics.
To access the breakdown of processes, select the Top APIs tab. You can configure the list of APIs.
To view the forward stack trace, select the Call hierarchy tab. Each listed method is tagged with the name and color of the API.
Select the Hotspots tab to view the top three hotspots with reverse stack traces.
Filter
When you filter the execution times and top APIs, the Call hierarchy and Hotspots views inherit the defined filters.
In the following example, filtering by code execution and Built-In JRE (by selecting Code execution under the Execution time tab and selecting Built-In JRE under the Top APIs tab) reveals in the Hotspots tab that most of the built-in JRE API execution time is within the ConcurrentLinkedQueue.iterator call. When you open the stack frames, you can identify the culprit.
