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#!/usr/bin/env python3
#
# log_compression.py
#
# Test log_compression and log_store_compressed. Uses null ioengine.
# Previous bugs have caused output in per I/O log files to be missing
# and/or out of order
#
# Expected result: 8000 log entries, offset starting at 0 and increasing by bs
# Buggy result: Log entries out of order (usually without log_store_compressed)
# and/or missing log entries (usually with log_store_compressed)
#
# USAGE
# python log_compression.py [-f fio-executable]
#
# EXAMPLES
# python t/log_compression.py
# python t/log_compression.py -f ./fio
#
# REQUIREMENTS
# Python 3.5+
#
# ===TEST MATRIX===
#
# With log_compression=10K
# With log_store_compressed=1 and log_compression=10K
import os
import sys
import platform
import argparse
import subprocess
def parse_args():
"""Parse command-line arguments."""
parser = argparse.ArgumentParser()
parser.add_argument('-f', '--fio',
help='path to fio executable (e.g., ./fio)')
return parser.parse_args()
def run_fio(fio,log_store_compressed):
fio_args = [
'--name=job',
'--ioengine=null',
'--filesize=1000M',
'--bs=128K',
'--rw=write',
'--iodepth=1',
'--write_bw_log=test',
'--per_job_logs=0',
'--log_offset=1',
'--log_compression=10K',
]
if log_store_compressed:
fio_args.append('--log_store_compressed=1')
subprocess.check_output([fio] + fio_args)
if log_store_compressed:
fio_inflate_args = [
'--inflate-log=test_bw.log.fz'
]
with open('test_bw.from_fz.log','wt') as f:
subprocess.check_call([fio]+fio_inflate_args,stdout=f)
def check_log_file(log_store_compressed):
filename = 'test_bw.from_fz.log' if log_store_compressed else 'test_bw.log'
with open(filename,'rt') as f:
file_data = f.read()
log_lines = [x for x in file_data.split('\n') if len(x.strip())!=0]
log_ios = len(log_lines)
filesize = 1000*1024*1024
bs = 128*1024
ios = filesize//bs
if log_ios!=ios:
print('wrong number of ios ({}) in log; should be {}'.format(log_ios,ios))
return False
expected_offset = 0
for line_number,line in enumerate(log_lines):
log_offset = int(line.split(',')[4])
if log_offset != expected_offset:
print('wrong offset ({}) for io number {} in log; should be {}'.format(
log_offset, line_number, expected_offset))
return False
expected_offset += bs
return True
def main():
"""Entry point for this script."""
args = parse_args()
if args.fio:
fio_path = args.fio
else:
fio_path = os.path.join(os.path.dirname(__file__), '../fio')
if not os.path.exists(fio_path):
fio_path = 'fio'
print("fio path is", fio_path)
passed_count = 0
failed_count = 0
for log_store_compressed in [False, True]:
run_fio(fio_path, log_store_compressed)
passed = check_log_file(log_store_compressed)
print('Test with log_store_compressed={} {}'.format(log_store_compressed,
'PASSED' if passed else 'FAILED'))
if passed:
passed_count+=1
else:
failed_count+=1
print('{} tests passed, {} failed'.format(passed_count, failed_count))
sys.exit(failed_count)
if __name__ == '__main__':
main()
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