EMA C++ Performace Tools Guide : 2 Open Source Performance Tool Suite Overview : 2.5 Recorded Results and Output : 2.5.3 Latency File
 
2.5.3 Latency File
You can configure EmaCppConsPerf to record each individual latency measurement to a file. This is useful for creating plot or distribution graphs, ensuring that recorded latencies are consistent, and for troubleshooting purposes.
These latencies are recorded on a per-thread basis. If the tool is configured to use multiple threads, a file is generated for each thread.
For further details on configuring this behavior, refer to the chapter specific to the application that you use.