This is the mail archive of the cygwin mailing list for the Cygwin project.

Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]
Other format: [Raw text]

Re: very poor cygwin scp performance in some situations

----- Original Message ----- From: "Dave Korn"

On 27 March 2006 16:39, Steven Hartland wrote:

I've done quite a bit of digging and not found any real answers
on why cygwin's scp performance is so poor.

See the thread about "select() too slow" last week for an explanation of the
Nagle algorithm, how windoze's implementation of it appears to be crippling,
and how using TCP_NODELAY can fix everything. (Thread ran from 11 Mar to 19

As a quick and dirty hack I channed set_nodelay into set_nonblock which seems to be set on all the sockets but unfortunately it doesn't seem to help. Anyone more familiar with the internals of openssh know where this might done?


This e.mail is private and confidential between Multiplay (UK) Ltd. and the person or entity to whom it is addressed. In the event of misdirection, the recipient is prohibited from using, copying, printing or otherwise disseminating it or any information contained in it.

In the event of misdirection, illegible or incomplete transmission please telephone (023) 8024 3137
or return the E.mail to

-- Unsubscribe info: Problem reports: Documentation: FAQ:

Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]