premiere-libtorrent/parse_disk_buffer_log.py

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#!/bin/python
import os, sys, time
lines = open(sys.argv[1], 'rb').readlines()
# logfile format:
# <time(ms)> <key>: <value>
# example:
# 16434 read cache: 17
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key_order = ['receive buffer', 'send buffer', 'write cache', 'read cache', 'hash temp']
colors = ['30f030', 'f03030', '80f080', 'f08080', '4040ff']
keys = []
fields = {}
maximum = {}
out = open('disk_buffer_log.dat', 'w+')
field_sum = {}
field_num_samples = {}
field_timestamp = {}
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for c in key_order:
keys.append(c)
fields[c] = 0
maximum[c] = 0
field_sum[c] = 0
field_num_samples[c] = 0
field_timestamp[c] = 0
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last_t = 0
for l in lines:
try:
t = int(l[0:l.find(' ')])
c = l[l.find(' ')+1:l.find(':')]
n = int(l[l.find(':')+1:-1])
except:
print l
continue
if last_t != t:
print >>out, '%d\t' % last_t,
for i in keys:
print >>out, '%d\t' % maximum[i],
print >>out, '\n',
if not c in keys:
keys.append(c)
fields[c] = 0
maximum[c] = 0
field_sum[c] = 0
field_num_samples[c] = 0
field_timestamp[c] = 0
field_sum[c] += fields[c] * float(t - field_timestamp[c])
field_timestamp[c] = t
fields[c] = n
if n > maximum[c]: maximum[c] = n
if last_t != t:
last_t = t
maximum = fields
for i in keys:
print '%s: avg: %f' % (i, field_sum[i] / last_t)
print
out.close()
out = open('disk_buffer.gnuplot', 'wb')
print >>out, "set term png size 1200,700"
print >>out, 'set output "disk_buffer.png"'
print >>out, 'set xrange [0:*]'
print >>out, 'set xlabel "time (ms)"'
print >>out, 'set ylabel "buffers"'
print >>out, "set style data lines"
print >>out, "set key box"
print >>out, 'plot',
count = 1 + len(keys)
keys.reverse()
for k in keys:
expr = "$%d" % count
for i in xrange(2, count): expr += "+$%d" % i
count -= 1
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print >>out, ' "disk_buffer_log.dat" using 1:(%s) title "%s" with filledcurves x1 lt rgb "#%s",' % (expr, k, colors[count-1]),
print >>out, 'x=0'
out.close()
os.system('gnuplot disk_buffer.gnuplot')