This is a simple application to read Method Profiling Samples from Java Flight Recorder dump and convert those Stack Traces to [FlameGraph] compatible format. [FlameGraph]: https://github.com/brendangregg/FlameGraph
This application uses the unsupported [JMC Parser]. [JMC Parser]: http://hirt.se/blog/?p=446
See my blog post on "Flame Graphs with Java Flight Recordings" for more details.
Step 1:
Run install-mc-jars.sh script.
The required JMC dependencies need to be installed to a local repository first. The script will install required JMC jars to the local repository (The
repodirectory) and output a file namedjmc_version.properties, which will show you the version of Java Mission Control Dependencies used. This script should automatically update the<jmc.version>property inpom.xml. Please verify that the<jmc.version>value is equal to the version found injmc_version.properties.
Step 2:
Run mvn clean install -U.
Clone Brendan's [FlameGraph] repository and set the environment variable FLAMEGRAPH_DIR to FlameGraph directory
git clone https://github.com/brendangregg/FlameGraph.git
export FLAMEGRAPH_DIR=/path/to/FlameGraph
There are helper scripts, to generate the flame graphs.
For example:
./create_flamegraph.sh -f /tmp/highcpu.jfr -i > flamegraph.svg
Open the SVG file in your web browser.
Use -h with scripts to see the available options.
For example:
$ ./flamegraph-output.sh -h
Usage: Application [options] [command] [command options]
Options:
-h, --help
Display Help
Default: false
Commands:
folded Create folded output
Usage: folded [options]
Options:
-d, --decompress
Decompress the JFR file
Default: false
-y, --end-timestamp
End timestamp in seconds for filtering
Default: 0
-a, --hide-arguments
Hide arguments in methods
Default: false
-i, --ignore-line-numbers
Ignore Line Numbers in Stack Frame
Default: false
* -f, --jfrdump
Java Flight Recorder Dump
-o, --output
Output file
-j, --print-jfr-details
Print JFR details and exit
Default: false
-t, --print-timestamp
Print timestamp in JFR Details
Default: false
-r, --show-return-value
Show return value for methods in the stack
Default: false
-x, --start-timestamp
Start timestamp in seconds for filtering
Default: 0
-s, --use-simple-names
Use simple names instead of qualified names in the stack
Default: false
json Create json output for d3-flame-graph
Usage: json [options]
Options:
-d, --decompress
Decompress the JFR file
Default: false
-y, --end-timestamp
End timestamp in seconds for filtering
Default: 0
-a, --hide-arguments
Hide arguments in methods
Default: false
-i, --ignore-line-numbers
Ignore Line Numbers in Stack Frame
Default: false
* -f, --jfrdump
Java Flight Recorder Dump
-l, --live
Export stack trace sample timestamp
Default: false
-o, --output
Output file
-j, --print-jfr-details
Print JFR details and exit
Default: false
-t, --print-timestamp
Print timestamp in JFR Details
Default: false
-r, --show-return-value
Show return value for methods in the stack
Default: false
-x, --start-timestamp
Start timestamp in seconds for filtering
Default: 0
-s, --use-simple-names
Use simple names instead of qualified names in the stack
Default: false
Copyright (C) 2015 M. Isuru Tharanga Chrishantha Perera
Licensed under the Apache License, Version 2.0
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