premiere-libtorrent/tools/parse_disk_access.py

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#!/usr/bin/env python
import os, sys, time
lines = open(sys.argv[1], 'rb').readlines()
# logfile format:
# <time(us)> <key>: <value>
# example:
# 16434 read cache: 17
keys = ['read', 'write', 'head movement', 'seek per read byte', 'seek per written byte',
'read operations per second', 'write operations per second']
colors = ['305030', '503030', '3030f0', '10a010', 'a01010', 'd0d040', 'd040d0']
style = ['dots', 'points', 'lines', 'lines', 'lines', 'lines', 'lines']
axis = ['x1y1', 'x1y1', 'x1y2', 'x1y2', 'x1y2', 'x1y2', 'x1y2']
plot = [True, False, False, False, False, True, False]
out = open('disk_access_log.dat', 'w+')
time = 1000000
last_pos = 0
last_t = 0
cur_movement = 0
cur_read = 0
cur_write = 0
cur_read_ops = 0
cur_write_ops = 0
for l in lines:
try:
# strip newline
l = l[0:-1].split(' ')
t = int(l[0])
k = l[1]
n = int(l[2])
except:
print l
continue
read = '-'
write = '-'
movement = '-'
amount_read = '-'
amount_write = '-'
read_ops = '-'
write_ops = '-'
if k == 'read':
read = '%d' % n
cur_read_ops += 1
if k == 'write':
write = '%d' % n
cur_write_ops += 1
if k == 'read_end': cur_read += n - last_pos
if k == 'write_end': cur_write += n - last_pos
cur_movement += abs(last_pos - n)
last_pos = n
if last_t + time <= t:
movement = '%d' % cur_movement
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if cur_read > 0:
amount_read = '%d' % (cur_movement / cur_read)
if cur_write > 0:
amount_write = '%d' % (cur_movement / cur_write)
read_ops = '%d' % cur_read_ops
write_ops = '%d' % cur_write_ops
cur_movement = 0
cur_read = 0
cur_write = 0
last_t = t
cur_read_ops = 0
cur_write_ops = 0
print >>out, '%d\t%s\t%s\t%s\t%s\t%s\t%s\t%s' % (t, read, write, movement, amount_read, amount_write, read_ops, write_ops)
out.close()
out = open('disk_access.gnuplot', 'wb')
print >>out, "set term png size 1200,700"
print >>out, 'set output "disk_access.png"'
print >>out, 'set xrange [*:*]'
#print >>out, 'set y2range [0:*]'
print >>out, 'set xlabel "time (us)"'
print >>out, 'set ylabel "drive offset"'
#print >>out, 'set y2label "bytes / %d second(s)"' % (time / 1000)
print >>out, "set key box"
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print >>out, "set tics nomirror"
print >>out, "set y2tics auto"
print >>out, 'plot',
count = 1
for k in keys:
count += 1
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if not plot[count-2]: continue
print >>out, ' "disk_access_log.dat" using 1:%d title "%s" with %s lt rgb "#%s" axis %s,' \
% (count, k, style[count-2], colors[count-2], axis[count-2]),
print >>out, 'x=0'
out.close()
os.system('gnuplot disk_access.gnuplot')