whisper-update-many-fadvice-test.py

#!/usr/bin/env python

# # Prepare test files.
# rm /tmp/test_*.wsp; for i in `seq 0 99`;do bin/whisper-create.py /tmp/test_$i.wsp 60s:25h 5m:21d 1h:90d 1d:2y; done

# Execute benchmark.
# sync; echo 3 | sudo tee /proc/sys/vm/drop_caches ; python bin/whisper-update-many-fadvice-test.py f | grep read

import random
import time
import sys
import ftools
import os
import whisper

pid = os.getpid()
argvs = sys.argv
argc = len(argvs)
if argc > 1:
    now = int(time.time())
    datapoints = [(now + i*60, random.randrange(100000))  for i in xrange(-99, 0)]

    for j in range(0,99):
        for i in range(0,99):
            path = "/tmp/test_" + str(i) + ".wsp"
            if argvs[1] == 'n':
                whisper.update_many(path, [ datapoints[j] ])
            elif argvs[1] == 'f':
                whisper.FADVISE_RANDOM = True
                whisper.update_many(path, [ datapoints[j] ])

for line in open('/proc/' + str(pid) + '/io', 'r'):
    print line,