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Updated Profiling using XRay (markdown)
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@ -85,3 +85,21 @@ Here you can do further filtering of the output. For a function call to be added
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# Example
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See [hermit/usr/openmpbench/syncbench.c](https://github.com/RWTH-OS/HermitCore/blob/dae722ea8cab9d14ba3e8e4700310b5dcf20d8ef/hermit/usr/openmpbench/syncbench.c).
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# Analysation
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After tracing your code, you may want to analyse the report. While the XRay report is already human-readable, it's hard to get an overview of the whole trace. Therefore, it's possible to convert the XRay report to a format that [kCacheGrind](https://kcachegrind.github.io) can read. You can find the tool needed for conversion at `/hermit/usr/xray/tools`.
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```bash
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$ ./conv2kcg.py libgomp_trace.xray
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INFO:Parsing Header is done. Found 1 frames
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INFO:Found frame 'PARALLEL' data
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INFO:Frame 'PARALLEL' complete
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INFO:Report file 'libgomp_trace.xray' parsed completely.
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INFO:Create callgrind file for frame 'PARALLEL'
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INFO:Writing to: libgomp_trace_PARALLEL.callgrind
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```
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This will create the file `libgomp_trace_PARALLEL.callgrind` which can be opened using kCacheGrind (Open dialog: set Filter to 'All Files') and may look like this:
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[[images/kcachegrind_screenshot.png]]
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