Metadata-Version: 2.1
Name: gprof2dot
Version: 2022.7.29
Summary: Generate a dot graph from the output of several profilers.
Home-page: https://github.com/jrfonseca/gprof2dot
Author: Jose Fonseca
Author-email: jose.r.fonseca@gmail.com
License: LGPL
Description: # About _gprof2dot_
        
        This is a Python script to convert the output from many profilers into a [dot graph](http://www.graphviz.org/doc/info/lang.html).
        
        It can:
        
          * read output from:
            * [Linux perf](http://perf.wiki.kernel.org/)
            * [Valgrind's callgrind tool](http://valgrind.org/docs/manual/cl-manual.html)
            * [oprofile](http://oprofile.sourceforge.net/)
            * [sysprof](http://www.daimi.au.dk/~sandmann/sysprof/)
            * [xperf](https://msdn.microsoft.com/en-us/windows/hardware/commercialize/test/wpt/index)
            * [VTune Amplifier XE](http://software.intel.com/en-us/intel-vtune-amplifier-xe)
            * [Very Sleepy](http://www.codersnotes.com/sleepy/)
            * [python profilers](http://docs.python.org/2/library/profile.html#profile-stats)
            * [Java's HPROF](http://docs.oracle.com/javase/7/docs/technotes/samples/hprof.html)
            * prof, [gprof](https://sourceware.org/binutils/docs/gprof/)
            * [DTrace](https://en.wikipedia.org/wiki/DTrace)
          * prune nodes and edges below a certain threshold;
          * use an heuristic to propagate time inside mutually recursive functions;
          * use color efficiently to draw attention to hot-spots;
          * work on any platform where Python and Graphviz is available, i.e, virtually anywhere.
        
        **If you want an interactive viewer for the graphs generated by _gprof2dot_, check [xdot.py](https://github.com/jrfonseca/xdot.py).**
        
        
        # Status
        
        _gprof2dot_ currently fulfills my needs, and I have little or no time for its
        maintenance.  So I'm afraid that any requested features are unlikely to be
        implemented, and I might be slow processing issue reports or pull requests.
        
        [![Build Status](https://github.com/jrfonseca/gprof2dot/actions/workflows/build.yml/badge.svg?branch=master)](https://github.com/jrfonseca/gprof2dot/actions/workflows/build.yml)
        
        
        # Example
        
        This is the result from the [example data](http://linuxgazette.net/100/misc/vinayak/overall-profile.txt) in the [Linux Gazette article](http://linuxgazette.net/100/vinayak.html) with the default settings:
        
        <!-- pngquant --speed=1 --ordered  --quality 0-85 ... -->
        ![Sample](https://raw.githubusercontent.com/jrfonseca/gprof2dot/cf98cc0b5eae9fcb896a6f92e9bc2bcb27666515/sample.png)
        
        # Requirements
        
          * [Python](http://www.python.org/download/): known to work with version 2.7 and 3.3; it will most likely _not_ work with earlier releases.
          * [Graphviz](http://www.graphviz.org/Download.php): tested with version 2.26.3, but should work fine with other versions.
        
        ## Windows users
        
          * Download and install [Python for Windows](http://www.python.org/download/)
          * Download and install [Graphviz for Windows](http://www.graphviz.org/Download_windows.php)
        
        ## Linux users
        
        On Debian/Ubuntu run:
        
            apt-get install python3 graphviz
        
        On RedHat/Fedora run
        
            yum install python3 graphviz
        
        
        # Download
        
          * [PyPI](https://pypi.python.org/pypi/gprof2dot/)
        
                pip install gprof2dot
        
          * [Standalone script](https://raw.githubusercontent.com/jrfonseca/gprof2dot/master/gprof2dot.py)
        
          * [Git repository](https://github.com/jrfonseca/gprof2dot)
        
        
        # Documentation
        
        ## Usage
        
            Usage:
                    gprof2dot.py [options] [file] ...
            
            Options:
              -h, --help            show this help message and exit
              -o FILE, --output=FILE
                                    output filename [stdout]
              -n PERCENTAGE, --node-thres=PERCENTAGE
                                    eliminate nodes below this threshold [default: 0.5]
              -e PERCENTAGE, --edge-thres=PERCENTAGE
                                    eliminate edges below this threshold [default: 0.1]
              -f FORMAT, --format=FORMAT
                                    profile format: axe, callgrind, hprof, json, oprofile,
                                    perf, prof, pstats, sleepy, sysprof or xperf [default:
                                    prof]
              --total=TOTALMETHOD   preferred method of calculating total time: callratios
                                    or callstacks (currently affects only perf format)
                                    [default: callratios]
              -c THEME, --colormap=THEME
                                    color map: color, pink, gray, bw, or print [default:
                                    color]
              -s, --strip           strip function parameters, template parameters, and
                                    const modifiers from demangled C++ function names
              -w, --wrap            wrap function names
              --show-samples        show function samples
              -z ROOT, --root=ROOT  prune call graph to show only descendants of specified
                                    root function
              -l LEAF, --leaf=LEAF  prune call graph to show only ancestors of specified
                                    leaf function
        	  --list-functions=SELECT list available functions as a help/preparation  for using the 
        	                        -l and -z flags. When selected the program only produces this
        							list. SELECT is used with the same matching syntax
        							as with -z(--root) and -l(--leaf). Special cases SELECT="+"
        							gets the full list, selector starting with "%" cause dump 
        							of all available information. 
              --skew=THEME_SKEW     skew the colorization curve.  Values < 1.0 give more
                                    variety to lower percentages.  Values > 1.0 give less
                                    variety to lower percentages
        
        ## Examples
        
        ### Linux perf
        
            perf record -g -- /path/to/your/executable
            perf script | c++filt | gprof2dot.py -f perf | dot -Tpng -o output.png
        
        ### oprofile
        
            opcontrol --callgraph=16
            opcontrol --start
            /path/to/your/executable arg1 arg2
            opcontrol --stop
            opcontrol --dump
            opreport -cgf | gprof2dot.py -f oprofile | dot -Tpng -o output.png
        
        ### xperf
        
        If you're not familiar with xperf then read [this excellent article](http://blogs.msdn.com/b/pigscanfly/archive/2009/08/06/stack-walking-in-xperf.aspx) first. Then do:
        
          * Start xperf as
        
                xperf -on Latency -stackwalk profile
        
          * Run your application.
        
          * Save the data.
        `
                xperf -d output.etl
        
          * Start the visualizer:
        
                xperf output.etl
        
          * In _Trace_ menu, select _Load Symbols_. _Configure Symbol Paths_ if necessary.
        
          * Select an area of interest on the _CPU sampling graph_, right-click, and select _Summary Table_.
        
          * In the _Columns_ menu, make sure the _Stack_ column is enabled and visible.
        
          * Right click on a row, choose _Export Full Table_, and save to _output.csv_.
        
          * Then invoke gprof2dot as
        
                gprof2dot.py -f xperf output.csv | dot -Tpng -o output.png
        
        ### VTune Amplifier XE
        
          * Collect profile data as (also can be done from GUI):
        
                amplxe-cl -collect hotspots -result-dir output -- your-app
        
          * Visualize profile data as:
        
                amplxe-cl -report gprof-cc -result-dir output -format text -report-output output.txt
                gprof2dot.py -f axe output.txt | dot -Tpng -o output.png
        
        See also [Kirill Rogozhin's blog post](http://software.intel.com/en-us/blogs/2013/04/05/making-visualized-call-graph-from-intel-vtune-amplifier-xe-results).
        
        ### gprof
        
            /path/to/your/executable arg1 arg2
            gprof path/to/your/executable | gprof2dot.py | dot -Tpng -o output.png
        
        ### python profile
        
            python -m profile -o output.pstats path/to/your/script arg1 arg2
            gprof2dot.py -f pstats output.pstats | dot -Tpng -o output.png
        
        ### python cProfile (formerly known as lsprof)
        
            python -m cProfile -o output.pstats path/to/your/script arg1 arg2
            gprof2dot.py -f pstats output.pstats | dot -Tpng -o output.png
        
        ### Java HPROF
        
            java -agentlib:hprof=cpu=samples ...
            gprof2dot.py -f hprof java.hprof.txt | dot -Tpng -o output.png
        
        See [Russell Power's blog post](http://rjp.io/2012/07/03/java-profiling/) for details.
        
        ### DTrace
        
            dtrace -x ustackframes=100 -n 'profile-97 /pid == 12345/ { @[ustack()] = count(); } tick-60s { exit(0); }' -o out.user_stacks
            gprof2dot.py -f dtrace out.user_stacks | dot -Tpng -o output.png
        
            # Notice: sometimes, the dtrace outputs format may be latin-1, and gprof2dot will fail to parse it.
            # To solve this problem, you should use iconv to convert to UTF-8 explicitly.
            # TODO: add an encoding flag to tell gprof2dot how to decode the profile file.
            iconv -f ISO-8859-1 -t UTF-8 out.user_stacks | gprof2dot.py -f dtrace
        
        ## Output
        
        A node in the output graph represents a function and has the following layout:
        
            +------------------------------+
            |        function name         |
            | total time % ( self time % ) |
            |         total calls          |
            +------------------------------+
        
        where:
        
          * _total time %_ is the percentage of the running time spent in this function and all its children;
          * _self time %_ is the percentage of the running time spent in this function alone;
          * _total calls_ is the total number of times this function was called (including recursive calls).
        
        An edge represents the calls between two functions and has the following layout:
        
                       total time %
                          calls
            parent --------------------> children
        
        Where:
        
          * _total time %_ is the percentage of the running time transfered from the children to this parent (if available);
          * _calls_ is the number of calls the parent function called the children.
        
        Note that in recursive cycles, the _total time %_ in the node is the same for the whole functions in the cycle, and there is no _total time %_ figure in the edges inside the cycle, since such figure would make no sense.
        
        The color of the nodes and edges varies according to the _total time %_ value. In the default _temperature-like_ color-map, functions where most time is spent (hot-spots) are marked as saturated red, and functions where little time is spent are marked as dark blue. Note that functions where negligible or no time is spent do not appear in the graph by default.
        
        ## Listing functions
        
        The flag `--list-functions` permits listing the function entries found in the `gprof` input.
        This is intended as a tool to prepare for utilisations with the `--leaf` (`-l`) 
        or `--root` (`-z`) flags.
        
          ~~~
          prof2dot.py -f pstats /tmp/myLog.profile  --list-functions "test_segments:*:*" 
            
          test_segments:5:<module>,
          test_segments:206:TestSegments,
          test_segments:46:<lambda>
          ~~~
        
          - The selector argument is used with Unix/Bash globbing/pattern matching, in the same
            fashion as performed by the `-l` and `-z` flags.
        	  
          - Entries are formatted '\<pkg\>:\<linenum\>:\<function\>'. 
        	
          - When selector argument starts with '%', a dump of all available information is 
        	performed for selected entries,   after removal of selector's leading '%'. If 
        	selector is "+" or "*", the full list of functions is printed.
        
        
        ## Frequently Asked Questions
        
        ### How can I generate a complete call graph?
        
        By default `gprof2dot.py` generates a _partial_ call graph, excluding nodes and edges with little or no impact in the total computation time. If you want the full call graph then set a zero threshold for nodes and edges via the `-n` / `--node-thres`  and `-e` / `--edge-thres` options, as:
        
            gprof2dot.py -n0 -e0
        
        ### The node labels are too wide. How can I narrow them?
        
        The node labels can get very wide when profiling C++ code, due to inclusion of scope, function arguments, and template arguments in demangled C++ function names.
        
        If you do not need function and template arguments information, then pass the `-s` / `--strip` option to strip them.
        
        If you want to keep all that information, or if the labels are still too wide, then you can pass the `-w` / `--wrap`, to wrap the labels. Note that because `dot` does not wrap labels automatically the label margins will not be perfectly aligned.
        
        ### Why there is no output, or it is all in the same color?
        
        Likely, the total execution time is too short, so there is not enough precision in the profile to determine where time is being spent.
        
        You can still force displaying the whole graph by setting a zero threshold for nodes and edges via the `-n` / `--node-thres`  and `-e` / `--edge-thres` options, as:
        
            gprof2dot.py -n0 -e0
        
        But to get meaningful results you will need to find a way to run the program for a longer time period (aggregate results from multiple runs).
        
        ### Why don't the percentages add up?
        
        You likely have an execution time too short, causing the round-off errors to be large.
        
        See question above for ways to increase execution time.
        
        ### Which options should I pass to gcc when compiling for profiling?
        
        Options which are _essential_ to produce suitable results are:
        
          * **`-g`** : produce debugging information
          * **`-fno-omit-frame-pointer`** : use the frame pointer (frame pointer usage is disabled by default in some architectures like x86\_64 and for some optimization levels; it is impossible to walk the call stack without it)
        
        _If_ you're using gprof you will also need `-pg` option, but nowadays you can get much better results with other profiling tools, most of which require no special code instrumentation when compiling.
        
        You want the code you are profiling to be as close as possible as the code that you will
        be releasing. So you _should_ include all options that you use in your release code, typically:
        
          * **`-O2`** : optimizations that do not involve a space-speed tradeoff
          * **`-DNDEBUG`** : disable debugging code in the standard library (such as the assert macro)
        
        However many of the optimizations performed by gcc interfere with the accuracy/granularity of the profiling results.  You _should_ pass these options to disable those particular optimizations:
        
          * **`-fno-inline-functions`** : do not inline functions into their parents (otherwise the time spent on these functions will be attributed to the caller)
          * **`-fno-inline-functions-called-once`** : similar to above
          * **`-fno-optimize-sibling-calls`** : do not optimize sibling and tail recursive calls (otherwise tail calls may be attributed to the parent function)
        
        If the granularity is still too low, you _may_ pass these options to achieve finer granularity:
        
          * **`-fno-default-inline`** : do not make member functions inline by default merely because they are defined inside the class scope
          * **`-fno-inline`** : do not pay attention to the inline keyword
        Note however that with these last options the timings of functions called many times will be distorted due to the function call overhead. This is particularly true for typical C++ code which _expects_ that these optimizations to be done for decent performance.
        
        See the [full list of gcc optimization options](http://gcc.gnu.org/onlinedocs/gcc/Optimize-Options.html) for more information.
        
        # Links
        
        See the [wiki](https://github.com/jrfonseca/gprof2dot/wiki) for external resources, including complementary/alternative tools.
        
Platform: UNKNOWN
Classifier: Development Status :: 6 - Mature
Classifier: Environment :: Console
Classifier: Intended Audience :: Developers
Classifier: Operating System :: OS Independent
Classifier: License :: OSI Approved :: GNU Lesser General Public License v3 or later (LGPLv3+)
Classifier: Programming Language :: Python :: 2.7
Classifier: Programming Language :: Python :: 3
Classifier: Topic :: Software Development
Requires-Python: >=2.7
Description-Content-Type: text/markdown
