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From brokensword <brokensw...@te.net.ua>
Subject [users@httpd] Re: ApacheBench (ab) Keep-Alive feature behavior
Date Wed, 15 Sep 2010 20:57:57 GMT

Will answer myself: simply was inaccurate in response with Content-Length
field - forgot to count last \r\n in content body.


brokensword wrote:
> 
> Hi.
> 
> I'm testing performance of some hand-made (on sockets) web-server.
> Everything looks fine, except "keep-alive http" test case. As I understand
> - in "keep-alive http" mode I shouldn't close() socket after each
> operation.
> So cycle should look like following:
> accept()
> read()
> write()
> read()
> write()
> ...
> until I receive "Connection: close" or some error etc.
> 
> After launching ab with -k flag, ab always hangs after first write(). I
> see my server's "Hello world" output in ab logs, but ab hangs forever
> until timeout fires and I never receive anything from second read().
> 
> If I change logic to
> accept()
> read()
> write()
> close()
> accept()
> read()
> write()
> close()
> ...
> everything works fine with ab -k.
> 
> But I'm losing sense of this keep-alive HTTP protocol feature then :(
> 
> Who can explain?
> 
> If you need a code - you can find it there:
> http://zenebo.com/lighttz.c.tar.gz
> 
> just comment there closing of socket in write callback (close(cli->fd))
> and ev_io_stop(EV_A_ w) in read and write callbacks. Also change
> Connection: close in http response to Connection: Keep-Alive.
> 
> 

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