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Author: HLilit

rootbench-scripts/README.md

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+## About
+
+flamegraph.sh is a script that generates Flame Graphs for each benchmark in `rootbench.git`. More information on Flame Graphs can be found [here](http://www.brendangregg.com/flamegraphs.html).
+
+## Options
+
+See the USAGE message (--help) for options. 
+
+To generate only CPU or only memory Flame Graphs, use `-c` or `-m` respectively. To generate both CPU and memory Flame Graphs for all benchmarks at once run the following command:
+```bash
+flamegraph.sh -d path/to/rootbench/build/dir -a -c -m 
+```
+
+To generate Flame Graphs for specific benchmark just run the following command with `-c` or `-m` options or both:
+ ```bash
+flamegraph.sh -d path/to/rootbench/build/dir -b path/to/benchmark 
+``` 
+
+## Configuration
+
+If `perf` cannot find symbols in the program try to execute the following commands
+```bash
+echo 0 > /proc/sys/kernel/kptr_restrict
+echo 1 > /proc/sys/kernel/sched_schedstats
+```
+
+To generate Flame Graphs for each benchmark add `-Dflamegraph=ON` option to your cmake configuration.
+
+```bash
+cmake ../rootbench -Dflamegraph=ON
+make -j4
+ctest -V -R rootbench-CLASSNAMEBenchmarks
+```
+You can also run the script for Flame Graph generation from your rootbench directory. 
+The Flame Graphs will be stored in the local rootbench build directory under FlameGraph folder.