Differences

This shows you the differences between two versions of the page.

--- tools:logger_trace:start [2018/05/25 09:34] – [Concurrent Writing of Trace Data] graf
+++ tools:logger_trace:start [2018/08/22 11:56] (current) – external edit 127.0.0.1
@@ Line 42: / Line 42: @@
 ===== Concurrent Writing of Trace Data =====
-The example above shows how a trace buffer can be written to a file. This has to be done only after the executor stopped, because the writing usually takes a long time. If you wish to write a trace buffer to a file for further analysis while the application still runsA trace block, though it will run by the control system, has to be enabled. If so, it will contineously fill its trace buffe
+The example above shows how a trace buffer can be written to a file. This has to be done only after the executor stopped, because the writing usually takes a long time. If you wish to write a trace buffer to a file for further analysis while the application still runs, you can use a ''TraceWriter''. This will do the writing in a separate thread and hence does not block the safety system or control system, see ''examples/controlSystem/traceTest''. In this example the trace buffer gets written to a file every 30 seconds.
+<code cpp>
+  TraceWriter<Vector3> tw(cs.trace2, "/tmp/ctrlData");
+  if (slRunning.getNofActivations() % (int)(30 / period) == 0) { // write to log file every 30s
+    tw.write();
+  }
+</code>
+The name of the trace file will be appended with the current date and time.