Messages in this thread | | | Date | Mon, 1 Mar 1999 14:03:51 -0500 (EST) | From | "Richard B. Johnson" <> | Subject | Re: Slow name-server lookups |
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On Mon, 1 Mar 1999, Alan Cox wrote:
> > This is what glibc-2.0.6 gethostbyname() does. > > > > socket(PF_INET, SOCK_DGRAM, IPPROTO_IP) = 3 > > connect(3, {sin_family=AF_INET, sin_port=htons(53), > > sin_addr=inet_addr("204.178.40.210")}, 16) = 0 > > > > It takes time to establish a connection. Looking at the glibc-2.0.6 code > > I see that the 'connection' is a trick to get a 'connection-refused' > > The UDP connect code is just internal book-keeping not a connection over > a network. So its one, fast, syscall >
Yes, I see it normally takes 23 microseconds on this machine except when there are the long pauses, at which time it takes about 500 milliseconds.
Cheers, Dick Johnson ***** FILE SYSTEM WAS MODIFIED ***** Penguin : Linux version 2.2.2 on an i686 machine (400.59 BogoMips). Warning : It's hard to remain at the trailing edge of technology. Wisdom : It's not a Y2K problem. It's a Y2Day problem.
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