layoutify.py

#resultify.py outputs results to csv

import csv
import subprocess

traces = 'traces_ext4_hdd_2gb_gc_on'
file_name = 'ext4'

resultfile = open('results_'+file_name+'_layout.csv','wb')
resultwriter = csv.writer(resultfile,delimiter=' ')
resultwriter.writerow( ('Aged_Layout_Score', 'Clean_Layout_Score') )

for i in range(0,1000):
 print('Processing test ' + str(i))
 try:
  subprocess.call('blkparse -q -a issue -f "%S %n \n" -i trace' + str(i).zfill(6) + '.blktrace.0 > agedgrep.txt', cwd=traces, shell=True)
 
  discontiguities = -1
  totalblocks = 0
  with open(traces+ '/agedgrep.txt') as tracefile:
   lastsector = -1
   for line in tracefile:
     splitline = line.split()
     if splitline[0].isdigit():
      sector = int(splitline[0])
      length = int(splitline[1])
      if lastsector != sector:
       discontiguities = discontiguities + 1
      lastsector = sector + length
      totalblocks = totalblocks + length/8
 
  aged_layout_score = str(float(1) - float(discontiguities)/float(totalblocks))
  
  subprocess.call('blkparse -q -a issue -f "%S %n \n" -i cleantrace' + str(i).zfill(6) + '.blktrace.0 > cleangrep.txt', cwd=traces, shell=True)
 
  discontiguities = -1
  totalblocks = 0
  with open( traces+'/cleangrep.txt') as tracefile:
   lastsector = -1
   for line in tracefile:
     splitline = line.split()
     if splitline[0].isdigit():
      sector = int(splitline[0])
      length = int(splitline[1])
      if lastsector != sector:
       discontiguities = discontiguities + 1
      lastsector = sector + length
      totalblocks = totalblocks + length/8
 
  clean_layout_score = str(float(1) - float(discontiguities)/float(totalblocks))
 
  resultrow = ( (aged_layout_score, clean_layout_score) )
  resultwriter.writerow(resultrow)
 
  subprocess.call('rm -f *.txt', cwd=traces, shell=True) 
 except Exception:
  pass