1eab25f292
* Fix paver violations to stablize edx-lint update * Parens, Line2Long * Fix missing docstrings * Fix PEP8 issues * Address PR feedback (thanks @nedbat!)
41 lines
959 B
Python
41 lines
959 B
Python
"""
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Workflows useful for reporting on runtime characteristics of the system
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"""
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import os
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import signal
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import tempfile
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import gc
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from datetime import datetime
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from meliae import scanner
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def dump_memory(signum, frame):
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"""
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Dump memory stats for the current process to a temp directory.
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Uses the meliae output format.
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"""
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timestamp = datetime.now().isoformat()
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format_str = '{}/meliae.{}.{}.{{}}.dump'.format(
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tempfile.gettempdir(),
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timestamp,
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os.getpid(),
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)
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scanner.dump_all_objects(format_str.format('pre-gc'))
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# force garbarge collection
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for gen in xrange(3):
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gc.collect(gen)
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scanner.dump_all_objects(
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format_str.format("gc-gen-{}".format(gen))
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)
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def install_memory_dumper(dump_signal=signal.SIGPROF):
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"""
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Install a signal handler on `signal` to dump memory stats for the current process.
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"""
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signal.signal(dump_signal, dump_memory)
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