How to use gprof2dot - 10 common examples

fields = line.split()
            samples = float(fields[0])
            callstack = fields[1:]

            callstack = [self.symbols[symbol_id] for symbol_id in callstack]

            callee = callstack[0]

            callee[SAMPLES] += samples
            self.profile[SAMPLES] += samples
            
            for caller in callstack[1:]:
                try:
                    call = caller.calls[callee.id]
                except KeyError:
                    call = Call(callee.id)
                    call[SAMPLES2] = samples
                    caller.add_call(call)
                else:
                    call[SAMPLES2] += samples

                callee = caller

def parse_subentry(self):
        entry = Struct()
        line = self.consume()
        mo = self.entry_re.match(line)
        if not mo:
            raise ParseError('failed to parse', line)
        fields = mo.groupdict()
        entry.samples = int(mo.group(1))
        if 'source' in fields and fields['source'] != '(no location information)':
            source = fields['source']
            filename, lineno = source.split(':')
            entry.filename = filename
            entry.lineno = int(lineno)
        else:
            source = ''
            entry.filename = None
            entry.lineno = None
        entry.image = fields.get('image', '')

def __init__(self, *filename):
        import pstats
        try:
            self.stats = pstats.Stats(*filename)
        except ValueError:
            if PYTHON_3:
                sys.stderr.write('error: failed to load %s\n' % ', '.join(filename))
                sys.exit(1)
            import hotshot.stats
            self.stats = hotshot.stats.load(filename[0])
        self.profile = Profile()
        self.function_ids = {}

function_id = process + '!' + symbol

        try:
            function = self.profile.functions[function_id]
        except KeyError:
            module, name = symbol.split('!', 1)
            function = Function(function_id, name)
            function.process = process
            function.module = module
            function[SAMPLES] = 0
            self.profile.add_function(function)

        return function


class SleepyParser(Parser):
    """Parser for GNU gprof output.

    See also:
    - http://www.codersnotes.com/sleepy/
    - http://sleepygraph.sourceforge.net/
    """

    stdinInput = False

    def __init__(self, filename):
        Parser.__init__(self)

        from zipfile import ZipFile

        self.database = ZipFile(filename)

#   - In the absence of call counts, call ratios are faked from the relative
#     proportions of total time.  This affects only the weighting of the calls.
#   - Different header, separator, and end marker.
#   - Extra whitespace after function names.
#   - You get a full entry for , which does not have parents.
#   - Cycles do have parents.  These are saved but unused (as they are
#     for functions).
#   - Disambiguated "unrecognized call graph entry" error messages.
# Notes:
#   - Total time of functions as reported by AXE passes the val3 test.
#   - CPU Time:Children in the input is sometimes a negative number.  This
#     value goes to the variable descendants, which is unused.
#   - The format of gprof-cc reports is unaffected by the use of
#       -knob enable-call-counts=true (no call counts, ever), or
#       -show-as=samples (results are quoted in seconds regardless).
class AXEParser(Parser):
    "Parser for VTune Amplifier XE 2013 gprof-cc report output."

    def __init__(self, fp):
        Parser.__init__(self)
        self.fp = fp
        self.functions = {}
        self.cycles = {}

    def readline(self):
        line = self.fp.readline()
        if not line:
            sys.stderr.write('error: unexpected end of file\n')
            sys.exit(1)
        line = line.rstrip('\r\n')
        return line

call[TOTAL_TIME] = ratio(value, nc)*ct

                caller.add_call(call)

        if False:
            self.stats.print_stats()
            self.stats.print_callees()

        # Compute derived events
        self.profile.validate()
        self.profile.ratio(TIME_RATIO, TIME)
        self.profile.ratio(TOTAL_TIME_RATIO, TOTAL_TIME)

        return self.profile

class DtraceParser(LineParser):
    """Parser for linux perf callgraph output.

    It expects output generated with
        
        # Refer to https://github.com/brendangregg/FlameGraph#dtrace
        # 60 seconds of user-level stacks, including time spent in-kernel, for PID 12345 at 97 Hertz     
        sudo dtrace -x ustackframes=100 -n 'profile-97 /pid == 12345/ { @[ustack()] = count(); } tick-60s { exit(0); }' -o out.user_stacks
        
        # The dtrace output
        gprof2dot.py -f dtrace out.user_stacks

        # 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
    """

parser = Format(args[0])

    profile = parser.parse()

    if options.output is None:
        if PYTHON_3:
            output = open(sys.stdout.fileno(), mode='wt', encoding='UTF-8', closefd=False)
        else:
            output = sys.stdout
    else:
        if PYTHON_3:
            output = open(options.output, 'wt', encoding='UTF-8')
        else:
            output = open(options.output, 'wt')

    dot = DotWriter(output)
    dot.strip = options.strip
    dot.wrap = options.wrap

    labelNames = options.node_labels or defaultLabelNames
    dot.show_function_events = [labels[l] for l in labelNames]
    if options.show_samples:
        dot.show_function_events.append(SAMPLES)

    profile = profile
    profile.prune(options.node_thres/100.0, options.edge_thres/100.0, options.filter_paths, options.color_nodes_by_selftime)

    if options.root:
        rootIds = profile.getFunctionIds(options.root)
        if not rootIds:
            sys.stderr.write('root node ' + options.root + ' not found (might already be pruned : try -e0 -n0 flags)\n')
            sys.exit(1)

def parse_subentry(self):
        entry = Struct()
        line = self.consume()
        mo = self.entry_re.match(line)
        if not mo:
            raise ParseError('failed to parse', line)
        fields = mo.groupdict()
        entry.samples = int(mo.group(1))
        if 'source' in fields and fields['source'] != '(no location information)':
            source = fields['source']
            filename, lineno = source.split(':')
            entry.filename = filename
            entry.lineno = int(lineno)
        else:
            source = ''
            entry.filename = None
            entry.lineno = None
        entry.image = fields.get('image', '')
        entry.application = fields.get('application', '')
        if 'symbol' in fields and fields['symbol'] != '(no symbols)':
            entry.symbol = fields['symbol']
        else:

function_name, file, line = match.groups()
                trace += [(function_name, file, line)]

        self.traces[int(tid)] = trace

    def parse_samples(self):
        self.consume()
        self.consume()

        while not self.lookahead().startswith('CPU'):
            rank, percent_self, percent_accum, count, traceid, method = self.lookahead().split()
            self.samples[int(traceid)] = (int(count), method)
            self.consume()


class SysprofParser(XmlParser):

    def __init__(self, stream):
        XmlParser.__init__(self, stream)

    def parse(self):
        objects = {}
        nodes = {}

        self.element_start('profile')
        while self.token.type == XML_ELEMENT_START:
            if self.token.name_or_data == 'objects':
                assert not objects
                objects = self.parse_items('objects')
            elif self.token.name_or_data == 'nodes':
                assert not nodes
                nodes = self.parse_items('nodes')