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dfbdaa28a5
Introduce `--profile` support to the benchmark helper script, which will invoke `perf` on Linux. Additionally, add a `--flamegraph` output option based on that.
145 lines
3.8 KiB
Python
Executable File
145 lines
3.8 KiB
Python
Executable File
#!/usr/bin/python
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#
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# stackcolllapse-chrome-tracing.py collapse Trace Event Format [1]
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# callstack events into single lines.
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#
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# [1] https://github.com/catapult-project/catapult/wiki/Trace-Event-Format
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#
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# USAGE: ./stackcollapse-chrome-tracing.py input_json [input_json...] > outfile
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#
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# Example input:
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#
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# {"traceEvents":[
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# {"pid":1,"tid":2,"ts":0,"ph":"X","name":"Foo","dur":50},
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# {"pid":1,"tid":2,"ts":10,"ph":"X","name":"Bar","dur":30}
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# ]}
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#
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# Example output:
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#
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# Foo 20.0
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# Foo;Bar 30.0
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#
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# Input may contain many stack trace events from many processes/threads.
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#
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# CDDL HEADER START
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#
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# The contents of this file are subject to the terms of the
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# Common Development and Distribution License (the "License").
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# You may not use this file except in compliance with the License.
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#
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# You can obtain a copy of the license at docs/cddl1.txt or
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# http://opensource.org/licenses/CDDL-1.0.
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# See the License for the specific language governing permissions
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# and limitations under the License.
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#
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# When distributing Covered Code, include this CDDL HEADER in each
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# file and include the License file at docs/cddl1.txt.
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# If applicable, add the following below this CDDL HEADER, with the
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# fields enclosed by brackets "[]" replaced with your own identifying
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# information: Portions Copyright [yyyy] [name of copyright owner]
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#
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# CDDL HEADER END
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#
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# 4-Jan-2018 Marcin Kolny Created this.
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import argparse
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import json
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stack_identifiers = {}
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class Event:
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def __init__(self, label, timestamp, dur):
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self.label = label
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self.timestamp = timestamp
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self.duration = dur
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self.total_duration = dur
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def get_stop_timestamp(self):
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return self.timestamp + self.duration
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def cantor_pairing(a, b):
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s = a + b
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return s * (s + 1) / 2 + b
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def get_trace_events(trace_file, events_dict):
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json_data = json.load(trace_file)
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for entry in json_data['traceEvents']:
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if entry['ph'] == 'X':
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cantor_val = cantor_pairing(int(entry['tid']), int(entry['pid']))
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if 'dur' not in entry:
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continue
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if cantor_val not in events_dict:
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events_dict[cantor_val] = []
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events_dict[cantor_val].append(Event(entry['name'], float(entry['ts']), float(entry['dur'])))
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def load_events(trace_files):
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events = {}
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for trace_file in trace_files:
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get_trace_events(trace_file, events)
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for key in events:
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events[key].sort(key=lambda x: x.timestamp)
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return events
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def save_stack(stack):
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first = True
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event = None
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identifier = ''
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for event in stack:
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if first:
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first = False
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else:
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identifier += ';'
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identifier += event.label
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if not event:
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return
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if identifier in stack_identifiers:
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stack_identifiers[identifier] += event.total_duration
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else:
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stack_identifiers[identifier] = event.total_duration
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def load_stack_identifiers(events):
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event_stack = []
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for e in events:
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if not event_stack:
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event_stack.append(e)
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else:
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while event_stack and event_stack[-1].get_stop_timestamp() <= e.timestamp:
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save_stack(event_stack)
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event_stack.pop()
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if event_stack:
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event_stack[-1].total_duration -= e.duration
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event_stack.append(e)
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while event_stack:
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save_stack(event_stack)
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event_stack.pop()
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parser = argparse.ArgumentParser()
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parser.add_argument('input_file', nargs='+',
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type=argparse.FileType('r'),
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help='Chrome Tracing input files')
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args = parser.parse_args()
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all_events = load_events(args.input_file)
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for tid_pid in all_events:
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load_stack_identifiers(all_events[tid_pid])
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for identifiers, duration in stack_identifiers.items():
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print(identifiers + ' ' + str(duration))
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