vurseek.blogg.se - Ubuntu view cpu usage

Select the Stop collecting profile data button to disable the automatic start of the data collection when an application is launched. An estimate for this delay is given in the Processing delay field.ĭata is collected until you select the Stop collecting profile data button or terminate the application. However, as the data is passed through the Perf tool and an extra helper program bundled with Qt Creator, and both buffer and process it on the fly, data may arrive in Qt Creator several seconds after it was generated.

This is indicated by the time running in the Recorded field. When you start analyzing an application, the application is launched, and the Performance Analyzer immediately begins to collect data. Note: If data collection does not start automatically, select the ( Collect profile data) button.

Select the ( Start) button to start the application from the Performance Analyzer.

Select Analyze > Performance Analyzer to profile the current application.

You can start the Performance Analyzer in the following ways:

To generate debug symbols also for applications compiled in release mode, select Projects, and then select Enable in the Separate debug info field.

To manually set up a build configuration that generates separate debug symbols, edit the project build settings: Profile builds produce optimized binaries with separate debug symbols and should generally be used for profiling. The Performance Analyzer usually needs to be able to locate debug symbols for the binaries involved.

The Performance Analyzer uses the Perf tool bundled with the Linux kernel to take periodic snapshots of the call chain of an application and visualizes them in a timeline view or as a flame graph. Qt Creator is integrated with the Linux Perf tool that can be used to analyze the CPU and memory usage of an application on embedded devices and, to a limited extent, on Linux desktop platforms.