i’m stunned: uncanny problem python sockets + threads


i have python book http-server: , benchmarking opposing apachebench (ab) concurrency turn (-c switch) devaluate following equal value i specified socket.listen()-call sourcecode all works fine, nonetheless shortly put concurrency turn apache dais above value socket.listen()-call opening drops by floor, example:




  • socket.listen(10) ab -n 50 -c 10 = 1200req/s

  • socket.listen(10) ab -n 50 -c 11 = 40req/s

  • socket.listen(100) ab -n 5000 -c 100 = 1000req/s

  • socket.listen(100) ab -n 5000 -c 101 = 32req/s



nothing changes formula between twin calls, i cant figure out wrong - during problem now. also note that: multiplexing chronicle same formula (i wrote review threaded version) works glorious matter socket.listen() set concurrency (-c switch) apache set to.



i've spent irc/python docs, posted comp.lang.python blog - i can't anyone even an thought wrong. assistance me!



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