Download Tracecompass

Upon opening my project in Eclipse 4.7.3.a on my ArchLinux a folder named .tracecompass keeps re-creating in the root folder of my project. If I remove it, it keeps recreating upon the next project opening.

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This last command will create 6 plugins in directory tracetypes named org.eclipse.tracecompass.incubator.my.awesome.tracetype with the Activators initialized, the pom.xml files already populated, etc. You are now ready to import those plugins in Eclipse and start developing.

First the feature plugins needs to be made ready with the proper dependencies, especially if some of those are themselves part of the incubator. The feature plugin is the one with no suffix. In the example above it would be org.eclipse.tracecompass.incubator.my.awesome.tracetype.

Babeltrace can be used to convert the generated trace to text format or write custom analysis with python. Looking at all the available options and evaluating them against our task, we decided to go for tracecompass, which is an Open Source application to solve performance and reliability issues by reading and analysing traces and logs of a system. Its goal is to provide views, graphs, metrics, and more to help the user to extract useful information from traces. This is done in a way that is more user-friendly and informative than producing huge text dumps.

After a decision on the project tools was made, we started setting up the client system for an auto-test where a script will start an LTTng session, trigger the steps needed to reproduce the problem and save the logs. This is left to run overnight, before checking the logs next morning. Then we run another script on it to find the particular cycle where the problem was reproduced (if it was). After a few days of testing we have collected some cycles of logs with the problem, and we started looking at the LTTng trace using tracecompass. Our log collection script had been collecting top logs also and we got the pid and tid from that log which we will need to trace in tracecompass. Tracecompass will then display the data in the form of graphs which are easy to visualize.An example trace is:

After going through the logs we found the problem and it was indeed because of a thread getting blocked due to the CPU being unavailable. We can not show the client log here, but we recreated the original problem by tweaking the process priorities which can show a similar trace in tracecompass.

The tutorial is based on Eclipse 4.4 (Eclipse Luna), Trace Compass 0.1.0 and SWTChart 0.7.0. If you are using TMF from the source repository, SWTChart is already included in the target definition file (see org.eclipse.tracecompass.target). You can also install it manually by using the Orbit update site.

Change to the Dependencies tab and select Add... of the Required Plug-ins section. A new dialog box will open. Next find plug-in org.eclipse.tracecompass.tmf.core and press OK

Following the same steps, add org.eclipse.tracecompass.tmf.ui and org.swtchart.

TMF provides base implementations for several types of views and viewers for generating custom X-Y-Charts, Time Graphs, or Trees. They are well integrated with various TMF features such as reading traces and time synchronization with other views. They also handle mouse events for navigating the trace and view, zooming or presenting detailed information at mouse position. The code can be found in the TMF UI plug-in org.eclipse.tracecompass.tmf.ui. See below for a list of relevant java packages:

Trace Compass provides base implementations for timing views and viewers for generating Latency Tables, Scatter Charts, Density Graphs and Statistics Tables. They are well integrated with various Trace Compass features such as reading traces and time synchronization with other views. They also handle mouse events for navigating the trace and view, zooming or presenting detailed information at mouse position. The code can be found in the Analysis Timing plug-in org.eclipse.tracecompass.analysis.timing.ui. See below for a list of relevant java packages: e24fc04721