premiere-libtorrent/examples/run_benchmarks.py

187 lines
6.0 KiB
Python

import sys
import os
import resource
import shutil
import shlex
import time
import subprocess
import random
# this is a disk I/O benchmark script. It runs menchmarks
# over different filesystems, different cache sizes and
# different number of peers (can be used to find a reasonable
# range for unchoke slots).
# it also measures performance improvements of re-ordering
# read requests based on physical location and OS hints
# like posix_fadvice(FADV_WILLNEED). It can also be used
# for the AIO branch to measure improvements over the
# classic thread based disk I/O
# to set up the test, build the example directoryin release
# with statistics=on and copy fragmentation_test, client_test
# and connection_tester to the current directory.
# make sure gnuplot is installed.
# the following lists define the space tests will be run in
# variables to test. All these are run on the first
# entry in the filesystem list.
cache_sizes = [0, 256, 512, 1024, 2048, 4096, 8192]
peers = [10, 100, 500, 1000, 2000]
# the drives are assumed to be mounted under ./<name>
# or have symbolic links to them.
filesystem = ['ext4', 'ext3', 'reiser', 'xfs']
# the number of peers for the filesystem test. The
# idea is to stress test the filesystem by using a lot
# of peers, since each peer essentially is a separate
# read location on the platter
filesystem_peers = 200
# the amount of cache for the filesystem test
filesystem_cache = 2096
# the number of seconds to run each test. It's important that
# this is shorter than what it takes to finish downloading
# the test torrent, since then the average rate will not
# be representative of the peak anymore
test_duration = 300
# make sure the environment is properly set up
if resource.getrlimit(resource.RLIMIT_NOFILE)[0] < 4000:
print 'please set ulimit -n to at least 4000'
sys.exit(1)
# make sure we have all the binaries available
binaries = ['client_test', 'connection_tester', 'fragmentation_test']
for i in binaries:
if not os.path.exists(i):
print 'make sure "%s" is available in current working directory' % i
sys.exit(1)
for i in filesystem:
if not os.path.exists(i):
print ('the path "%s" does not exist. This is directory/mountpoint is ' +
'used as the download directory and is the filesystem that will be benchmarked ' +
'and need to exist.') % i
sys.exit(1)
# make sure we have a test torrent
if not os.path.exists('test.torrent'):
print 'generating test torrent'
os.system('./connection_tester gen-torrent test.torrent')
# use a new port for each test to make sure they keep working
# this port is incremented for each test run
port = 10000 + random.randint(0, 5000)
def build_commandline(config, port):
num_peers = config['num-peers']
no_disk_reorder = '';
if config['allow-disk-reorder'] == False:
no_disk_reorder = '-O'
no_read_ahead = ''
if config['read-ahead'] == False:
no_read_ahead = '-j'
global test_duration
return './client_test -k -z -N -h -H -M -B %d -l %d -S %d -T %d -c %d -C %d -s "%s" %s %s -q %d -p %d -f session_stats/alerts_log.txt test.torrent' \
% (test_duration, num_peers, num_peers, num_peers, num_peers, config['cache-size'], config['save-path'] \
, no_disk_reorder, no_read_ahead, test_duration, port)
def delete_files(files):
for i in files:
try: os.remove(i)
except:
try: shutil.rmtree(i)
except: pass
def build_test_config(fs, num_peers, cache_size, readahead=True, reorder=True):
config = {'test': 'dual', 'save-path': os.path.join('./', fs), 'num-peers': num_peers, 'allow-disk-reorder': reorder, 'cache-size': cache_size, 'read-ahead': readahead}
return config
def build_target_folder(config):
reorder = 'reorder'
if config['allow-disk-reorder'] == False: reorder = 'no-reorder'
readahead = 'readahead'
if config['read-ahead'] == False: readahead = 'no-readahead'
return 'results_%d_%d_%s_%s_%s_%s' % (config['num-peers'], config['cache-size'], os.path.split(config['save-path'])[1], config['test'], reorder, readahead)
def run_test(config):
if os.path.exists(build_target_folder(config)):
print 'results already exists, skipping test'
return
# make sure any previous test file is removed
delete_files([os.path.join(config['save-path'], 'stress_test_file'), '.ses_state', os.path.join(config['save-path'], '.resume'), '.dht_state', 'session_stats'])
try: os.mkdir('session_stats')
except: pass
# save off the command line for reference
global port
cmdline = build_commandline(config, port)
f = open('session_stats/cmdline.txt', 'w+')
f.write(cmdline)
f.close()
f = open('session_stats/config.txt', 'w+')
print >>f, config
f.close()
f = open('session_stats/client.output', 'w+')
print 'launching: %s' % cmdline
client = subprocess.Popen(shlex.split(cmdline), stdout=f)
time.sleep(1)
print '\n\n*********************************'
print '* RUNNING TEST *'
print '*********************************\n\n'
print 'launching connection tester'
os.system('./connection_tester %s %d 127.0.0.1 %d test.torrent >session_stats/tester.output' % (config['test'], config['num-peers'], port))
f.close()
# run fragmentation test
print 'analyzing fragmentation'
os.system('./fragmentation_test test.torrent %s' % config['save-path'])
shutil.copy('fragmentation.log', 'session_stats/')
shutil.copy('fragmentation.png', 'session_stats/')
shutil.copy('fragmentation.gnuplot', 'session_stats/')
os.chdir('session_stats')
# parse session stats
print 'parsing session log'
os.system('python ../../parse_session_stats.py *.0000.log')
os.chdir('..')
# move the results into its final place
print 'saving results'
os.rename('session_stats', build_target_folder(config))
# clean up
print 'cleaning up'
delete_files([os.path.join(config['save-path'], 'stress_test_file'), '.ses_state', os.path.join(config['save-path'], '.resume'), '.dht_state'])
port += 1
for fs in filesystem:
config = build_test_config(fs, filesystem_peers, filesystem_cache)
run_test(config)
for c in cache_sizes:
for p in peers:
for rdahead in [True, False]:
for reorder in [True, False]:
config = build_test_config(filesystem[0], p, c, rdahead, reorder)
run_test(config)