socket performance (was Re: Building cygwin1.dll)

[Corinna Vinschen]

On Jan 10 15:24, Steven Hartland wrote:
> If your running Windows 7 or 2k8 are you running the following hotfix, if not
> you should try that too, just in case you machine has got a degraded tcp
> stack.
> 
> http://support.microsoft.com/kb/983528

I tried that, but it doesn't install.  The installer tells me "The
update is not applicable to your computer."  This is W7 64 bit on a
Lenovo laptop.

What's also puzzeling is this.  I tried this on three virtual machines
as well, W7 32, W7 64, 2008R2 64.  In all three VMs scp was almost just
as fast as sftp, about 13 MB/s. 

So why is scp (and rsync, too, btw) half as fast on the real HW as on
the VMs while sftp is three times faster?!?  That doesn't make sense.


Corinna

-- 
Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Project Co-Leader          cygwin AT cygwin DOT com
Red Hat

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