131 lines
4.0 KiB
Python
131 lines
4.0 KiB
Python
# Copyright (C) 2015 Yahoo! Inc. All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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"""
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Profile a simple engine build/load/compile/prepare/validate/run.
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"""
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import argparse
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import cProfile as profiler
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import pstats
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from oslo_utils import timeutils
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import six
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from six.moves import range as compat_range
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from taskflow import engines
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from taskflow.patterns import linear_flow as lf
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from taskflow import task
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def print_header(name):
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if name:
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header_footer = "-" * len(name)
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print(header_footer)
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print(name)
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print(header_footer)
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class ProfileIt(object):
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stats_ordering = ('cumulative', 'calls',)
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def __init__(self, name, args):
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self.name = name
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self.profile = profiler.Profile()
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self.args = args
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def __enter__(self):
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self.profile.enable()
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def __exit__(self, exc_tp, exc_v, exc_tb):
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self.profile.disable()
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buf = six.StringIO()
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ps = pstats.Stats(self.profile, stream=buf)
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ps = ps.sort_stats(*self.stats_ordering)
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percent_limit = max(0.0, max(1.0, self.args.limit / 100.0))
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ps.print_stats(percent_limit)
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print_header(self.name)
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needs_newline = False
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for line in buf.getvalue().splitlines():
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line = line.lstrip()
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if line:
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print(line)
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needs_newline = True
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if needs_newline:
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print("")
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class TimeIt(object):
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def __init__(self, name, args):
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self.watch = timeutils.StopWatch()
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self.name = name
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self.args = args
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def __enter__(self):
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self.watch.restart()
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def __exit__(self, exc_tp, exc_v, exc_tb):
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self.watch.stop()
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duration = self.watch.elapsed()
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print_header(self.name)
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print("- Took %0.3f seconds to run" % (duration))
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class DummyTask(task.Task):
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def execute(self):
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pass
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def main():
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parser = argparse.ArgumentParser(description=__doc__)
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parser.add_argument('--profile', "-p",
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dest='profile', action='store_true',
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default=False,
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help='profile instead of gather timing'
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' (default: False)')
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parser.add_argument('--dummies', "-d",
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dest='dummies', action='store', type=int,
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default=100, metavar="<number>",
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help='how many dummy/no-op tasks to inject'
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' (default: 100)')
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parser.add_argument('--limit', '-l',
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dest='limit', action='store', type=float,
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default=100.0, metavar="<number>",
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help='percentage of profiling output to show'
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' (default: 100%%)')
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args = parser.parse_args()
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if args.profile:
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ctx_manager = ProfileIt
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else:
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ctx_manager = TimeIt
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dummy_am = max(0, args.dummies)
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with ctx_manager("Building linear flow with %s tasks" % dummy_am, args):
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f = lf.Flow("root")
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for i in compat_range(0, dummy_am):
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f.add(DummyTask(name="dummy_%s" % i))
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with ctx_manager("Loading", args):
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e = engines.load(f)
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with ctx_manager("Compiling", args):
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e.compile()
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with ctx_manager("Preparing", args):
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e.prepare()
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with ctx_manager("Validating", args):
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e.validate()
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with ctx_manager("Running", args):
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e.run()
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if __name__ == "__main__":
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main()
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