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104 changes: 104 additions & 0 deletions
104
mlperf_logging/compliance_checker/mlp_parser/ruleset_210.py
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,104 @@ | ||
| ''' | ||
| Parses a text MLPerf log into a structured format. | ||
| ''' | ||
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| from __future__ import print_function | ||
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| import collections | ||
| import json | ||
| import re | ||
| import sys | ||
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| from io import open | ||
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| LogLine = collections.namedtuple('LogLine', [ | ||
| 'full_string', # the complete line as a string | ||
| 'timestamp', # seconds as a float, e.g. 1234.567 | ||
| 'key', # the string key | ||
| 'value', # the parsed value associated with the tag, or None if no value | ||
| 'lineno', # the line number in the file | ||
| ]) | ||
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| TOKEN = ':::MLLOG ' | ||
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| def parse_line(line): | ||
| if not line.startswith(TOKEN): | ||
| return None | ||
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| return json.loads(line[len(TOKEN):]) | ||
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| def string_to_logline(lineno, string): | ||
| ''' Returns a LogLine or raises a ValueError ''' | ||
| m = parse_line(string) | ||
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| if m is None: | ||
| raise ValueError('does not match regex') | ||
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| args = [] | ||
| args.append(string) # full string | ||
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| ts = float(m['time_ms']) # may raise error, e.g. "1.2.3" | ||
| # TODO check for weird values | ||
| args.append(ts) | ||
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| args.append(m['key']) # key | ||
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| j = { 'value': m['value'], 'metadata': m['metadata'] } | ||
| args.append(j) | ||
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| args.append(lineno) | ||
| return LogLine(*args) | ||
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| def parse_file(filename): | ||
| ''' Reads a file by name and returns list of loglines and list of errors''' | ||
| with open(filename, encoding='latin-1') as f: | ||
| return parse_generator(f) | ||
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| def strip_and_dedup(gen): | ||
| lines = [] | ||
| for l in gen: | ||
| if TOKEN not in l: | ||
| continue | ||
| lines.append(re.sub(".*"+TOKEN, TOKEN, l)) | ||
| return lines | ||
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| def parse_generator(gen): | ||
| ''' Reads a generator of lines and returns (loglines, errors) | ||
| The list of errors are any parsing issues as a tuple (str_line, error_msg) | ||
| ''' | ||
| loglines = [] | ||
| failed = [] | ||
| for lineno, line in enumerate(strip_and_dedup(gen)): | ||
| line = line.strip() | ||
| try: | ||
| ll = string_to_logline(lineno, line) | ||
| loglines.append(ll) | ||
| except ValueError as e: | ||
| failed.append((line, str(e))) | ||
| return loglines, failed | ||
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| if __name__ == '__main__': | ||
| if len(sys.argv) != 2: | ||
| print('usage: mlp_parser.py FILENAME') | ||
| print(' tests parsing on the file.') | ||
| sys.exit(1) | ||
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| filename = sys.argv[1] | ||
| lines, errors = parse_file(filename) | ||
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| print('Parsed {} log lines with {} errors.'.format(len(lines), len(errors))) | ||
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| if len(errors) > 0: | ||
| print('Lines which failed to parse:') | ||
| for line, error in errors: | ||
| print(' Following line failed: {}'.format(error)) | ||
| print(line) | ||
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