私はツイストに基づいて Web ベンチマーク ツールを作成しようとしています。Twisted は、Web アプリケーション用の非常に優れた非同期フレームワークです。このフレームワークを使い始めて 2 週間しか経っていないので、問題に直面しました。このベンチマーク ツールを ApacheBench と比較してテストすると、同じ同時実行数でも結果が大きく異なります。これが私のツールの結果です：
python pyab.py 50000 50 http://xx.com/a.txt
speed:1063(q/s), worker:50, interval:7, req_made:7493, req_done:7443, req_error:0
Apache Bench の結果は次のとおりです。
ab -c 50 -n 50000 http://xx.com/a.txt
Server Software: nginx/1.4.1
Server Hostname: 203.90.245.26
Server Port: 8080
Document Path: /a.txt
Document Length: 6 bytes
Concurrency Level: 50
Time taken for tests: 6.89937 seconds
Complete requests: 50000
Failed requests: 0
Write errors: 0
Total transferred: 12501750 bytes
HTML transferred: 300042 bytes
Requests per second: 8210.27 [#/sec] (mean)
Time per request: 6.090 [ms] (mean)
Time per request: 0.122 [ms] (mean, across all concurrent requests)
Transfer rate: 2004.62 [Kbytes/sec] received
Connection Times (ms)
min mean[+/-sd] median max
Connect: 0 0 0.8 0 4
Processing: 1 5 3.4 5 110
Waiting: 0 2 3.6 2 109
Total: 1 5 3.5 5 110
Percentage of the requests served within a certain time (ms)
50% 5
66% 6
75% 6
80% 6
90% 7
95% 7
98% 8
99% 8
100% 110 (longest request)
同じ URL と同時実行数で、ApacheBench は最大 8000 リクエスト/秒に達することができますが、pyab は 1000 リクエスト/秒しかありません。
ここに私のコード（pyab.py）があります：
from twisted.internet import reactor,threads
from twisted.internet.protocol import Protocol
from twisted.internet.defer import Deferred
from twisted.web.client import Agent
from twisted.web.client import HTTPConnectionPool
from twisted.web.http_headers import Headers
from twisted.python import log
import time, os, stat, logging, sys
from collections import Counter
logging.basicConfig(
#filename= "/%s/log/%s.%s" % (RUN_DIR,RUN_MODULE,RUN_TIME),
format="%(asctime)s [%(levelname)s] %(message)s",
level=logging.WARNING,
#level=logging.DEBUG,
stream=sys.stdout
)
#log.startLogging(sys.stdout)
observer = log.PythonLoggingObserver()
observer.start()
class IgnoreBody(Protocol):
def __init__(self, deferred, tl):
self.deferred = deferred
self.tl = tl
def dataReceived(self, bytes):
pass
def connectionLost(self, reason):
self.deferred.callback(None)
class Pyab:
def __init__( self, n = 50000, concurrency = 100, url='http://203.90.245.26:8080/a.txt'):
self.n = n
self.url = url
self.pool = HTTPConnectionPool(reactor, persistent=True)
self.pool.maxPersistentPerHost = concurrency
self.agent = Agent(reactor, connectTimeout = 5, pool = self.pool)
#self.agent = Agent(reactor, connectTimeout = 5)
self.time_start = time.time()
self.max_worker = concurrency
self.cnt = Counter({
'worker' : 0 ,
'req_made' : 0,
'req_done' : 0,
'req_error' : 0,
})
def monitor( self ):
interval = int(time.time() - self.time_start)
speed = 0
if interval != 0:
speed = int( self.cnt['req_done'] / interval )
log.msg("speed:%d(q/s), worker:%d, interval:%d, req_made:%d, req_done:%d, req_error:%d"
% (speed, self.cnt['worker'], interval, self.cnt['req_made'], self.cnt['req_done'], self.cnt['req_error']), logLevel=logging.WARNING)
reactor.callLater(1, lambda : self.monitor())
def start( self ):
self.keeprunning = True
self.monitor()
self.readMore()
def stop( self ):
self.keeprunning = False
def readMore( self ):
while self.cnt['worker'] < self.max_worker and self.cnt['req_done'] < self.n :
self.make_request()
if self.keeprunning and self.cnt['req_done'] < self.n:
reactor.callLater( 0.0001, lambda: self.readMore() )
else:
reactor.stop()
def make_request( self ):
d = self.agent.request(
'GET',
#'http://examplexx.com/',
#'http://example.com/',
#'http://xa.xingcloud.com/v4/qvo/WDCXWD7500AADS-00M2B0_WD-WCAV5E38536685366?update0=ref0%2Ccor&update1=nation%2Ccn&action0=visit&_ts=1376397973636',
#'http://203.90.245.26:8080/a.txt',
self.url,
Headers({'User-Agent': ['Twisted Web Client Example']}),
None)
self.cnt['worker'] += 1
self.cnt['req_made'] += 1
def cbResponse(resp):
self.cnt['worker'] -= 1
self.cnt['req_done'] += 1
log.msg('response received')
finished = Deferred()
resp.deliverBody(IgnoreBody(finished, self))
return finished
def cbError(error):
self.cnt['worker'] -= 1
self.cnt['req_error'] += 1
log.msg(error, logLevel=logging.ERROR)
d.addCallback(cbResponse)
d.addErrback(cbError)
if __name__ == '__main__' :
if len(sys.argv) < 4:
print "Usage: %s <n> <concurrency> <url>" % (sys.argv[0])
sys.exit()
ab = Pyab(n=int(sys.argv[1]), concurrency=int(sys.argv[2]), url=sys.argv[3])
ab.start()
reactor.run()
私のコードに問題はありますか? ありがとう！