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Re: Loopback problem?
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Re: Loopback problem?


  • Subject: Re: Loopback problem?
  • From: Josh Graessley <email@hidden>
  • Date: Fri, 5 May 2006 13:56:36 -0700


What is your read size, how much do you try to read out of the socket at once? I vaguely remember a pathological case where the read size matched the TCP window size. The stack wouldn't open up the window until the data had been read by the client. The read wouldn't complete until the window was full. This meant there was effectively no streaming. The performance was increased by reading half as much data at once.


-josh

On May 5, 2006, at 1:41 PM, Alex Yash wrote:

What happends when they are connected to a network?  I wonder if this
is a DNS lookup problem..

If I launch both the client and server on the same G4, this is very slow. If the machine is on a network but I launch the client and the server (using 127.0.0.1 or the IP address), it's slow too. That's why I think this is not a network problem.

But if I launch the client on a G4 and the server on another G4, the
speed is 40 time faster than in local.

Really strange...
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  • Follow-Ups:
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References: 
 >Loopback problem? (From: "Alex Yash" <email@hidden>)
 >Re: Loopback problem? (From: lbland <email@hidden>)
 >Re: Loopback problem? (From: "Alex Yash" <email@hidden>)
 >Re: Loopback problem? (From: Tom Marchand <email@hidden>)
 >Re: Loopback problem? (From: "Alex Yash" <email@hidden>)

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