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5cc5bb5922
Update event format to 2.0.0 since telemetry format changed. New macro EVENT_ANY_FIELDS allows consumers to determine the layout of the event header. mpseventpy now analyzes the event layout (including padding bytes) and emits struct format specifications. New program tool/monitor.py reads and unpacks a stream of telemetry events. Copied from Perforce Change: 194026
39 lines
1.1 KiB
Python
39 lines
1.1 KiB
Python
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import argparse
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import struct
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import sys
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import mpsevent
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def run(file):
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_read = file.read
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_unpack = struct.unpack
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_any_desc = mpsevent.EventAnyDesc
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_any_size = mpsevent.EVENT_ANY_SIZE
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_any_format = mpsevent.EVENT_ANY_FORMAT
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_event = mpsevent.EVENT
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while True:
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header_data = _read(_any_size)
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if not header_data:
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break
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header = _any_desc(*_unpack(_any_format, header_data))
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event_desc = _event[header.code]
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size = header.size - _any_size
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assert size <= event_desc.maxsize
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event_data = _read(size)
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print(event_desc.name, event_desc.format, len(event_data))
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event = _unpack(event_desc.format, event_data)
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def main():
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parser = argparse.ArgumentParser(description="Memory Pool System Monitor.")
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parser.add_argument('telemetry', metavar='FILENAME', nargs='?',
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type=argparse.FileType('rb'), default=sys.stdin,
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help="telemetry output from the MPS instance")
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args = parser.parse_args()
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run(args.telemetry)
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if __name__ == '__main__':
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main()
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