Re: Re: X-forwarding very very slow
On 8:59 PM, Jeremy Bopp wrote: On 8/18/2010 11:55 AM, Csaba Raduly wrote: On Wed, Aug 18, 2010 at 5:43 PM, Alberto Canestrelli wrote: Hi, I have a problem with Cygwin. I am connecting from USA by ssh to the Hector supermachine in Edinburgh ( I write startx in Cygwin and then I use ssh -Y v1aca...@login.hector.ac.uk ). Everything works fine, the only problem is that the forwarding of the windows is very very slow. Hi Alberto, It would be useful if you could try a non-Cygwin X server (e.g. a Linux or Solaris workstation). If X from under Linux appears fast, then the slowdown could be between your network card and display (probably Cygwin's fault). If X from Linux is also slow, the problem may be with the propagation of the X protocol between your network card and Hector (probably not Cygwin's fault) . You could also try enabling compression with -C. I have found this to be a necessity when connecting with X over ssh between work and home even though the locations are quite near each other and plain text based ssh access runs fine without the compression. In my experience, any off-campus access to X is best done via VNC or rdesktop (both over a compressed ssh tunnel). Triply so if you're crossing an ocean. The protocol simply was not designed with slow or laggy networks in mind, from what I can tell. There are faster X-servers for windows, but not free, and I haven't noticed that they reduce the amount of protocol chatter much, especially for the unbearably slow process of opening a new window. Regards, Ryan -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple
X-forwarding very very slow
Hi, I have a problem with Cygwin. I am connecting from USA by ssh to the Hector supermachine in Edinburgh ( I write startx in Cygwin and then I use ssh -Y v1aca...@login.hector.ac.uk ). Everything works fine, the only problem is that the forwarding of the windows is very very slow. It takes sometimes also up to 5 minutes to open a new window. I am debugging a code with Totalview and it is a impossible to work. I am in contact with the Hector support and with their computer they tried to run Cygwin under windows and connecting by ssh (exactly like I am doing) and they say that x-forwarding is fast. My version is: CYGWIN_NT-5.1 1.7.1(0.218/5/3) 2009-12-07 11:48 while their version is: CYGWIN_NT-6.0 1.5.25(0.156/4/2) 2008-06-12 19:34 So my version is more recent. I do not fell like to downgrade Cygwin, everything works well save the slow X-forwarding. Any suggestion please? Thank you very much best regards Alberto -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple
Re: X-forwarding very very slow
On 8/18/10 8:43 AM, Alberto Canestrelli wrote: I have a problem with Cygwin. I am connecting from USA by ssh to the Hector supermachine in Edinburgh ( I write startx in Cygwin and then I use ssh -Y v1aca...@login.hector.ac.uk ). Everything works fine, the only problem is that the forwarding of the windows is very very slow. It takes sometimes also up to 5 minutes to open a new window. I am debugging a code with Totalview and it is a impossible to work. I am in contact with the Hector support and with their computer they tried to run Cygwin under windows and connecting by ssh (exactly like I am doing) and they say that x-forwarding is fast. The performance they're seeing probably has little to do with their Cygwin version --- they're a lot closer, after all, so support's latency is probably a lot lower. NX actually works under Cygwin, though it's a pain to compile (and unsupported I imagine). This document provides an introduction to getting the system to work: http://www.nomachine.com/documentation/building-components.php -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple
Re: X-forwarding very very slow
On 8/18/2010 11:50 AM, Daniel Colascione wrote: On 8/18/10 8:43 AM, Alberto Canestrelli wrote: I have a problem with Cygwin. I am connecting from USA by ssh to the Hector supermachine in Edinburgh ( I write startx in Cygwin and then I use ssh -Y v1aca...@login.hector.ac.uk ). Everything works fine, the only problem is that the forwarding of the windows is very very slow. It takes sometimes also up to 5 minutes to open a new window. I am debugging a code with Totalview and it is a impossible to work. I am in contact with the Hector support and with their computer they tried to run Cygwin under windows and connecting by ssh (exactly like I am doing) and they say that x-forwarding is fast. The performance they're seeing probably has little to do with their Cygwin version --- they're a lot closer, after all, so support's latency is probably a lot lower. Agreed. I would point out, however, that the OPs Cygwin versions are pretty out-of-date as well. Though I'm not sure it will help in this particular matter, it's worth thinking about upgrading. -- Larry Hall http://www.rfk.com RFK Partners, Inc. (508) 893-9779 - RFK Office 216 Dalton Rd. (508) 893-9889 - FAX Holliston, MA 01746 _ A: Yes. Q: Are you sure? A: Because it reverses the logical flow of conversation. Q: Why is top posting annoying in email? -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple
Re: X-forwarding very very slow
On Wed, Aug 18, 2010 at 5:43 PM, Alberto Canestrelli wrote: Hi, I have a problem with Cygwin. I am connecting from USA by ssh to the Hector supermachine in Edinburgh ( I write startx in Cygwin and then I use ssh -Y v1aca...@login.hector.ac.uk ). Everything works fine, the only problem is that the forwarding of the windows is very very slow. Hi Alberto, It would be useful if you could try a non-Cygwin X server (e.g. a Linux or Solaris workstation). If X from under Linux appears fast, then the slowdown could be between your network card and display (probably Cygwin's fault). If X from Linux is also slow, the problem may be with the propagation of the X protocol between your network card and Hector (probably not Cygwin's fault) . -- Life is complex, with real and imaginary parts. Ok, it boots. Which means it must be bug-free and perfect. -- Linus Torvalds People disagree with me. I just ignore them. -- Linus Torvalds -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple
Re: X-forwarding very very slow
On 8/18/2010 11:55 AM, Csaba Raduly wrote: On Wed, Aug 18, 2010 at 5:43 PM, Alberto Canestrelli wrote: Hi, I have a problem with Cygwin. I am connecting from USA by ssh to the Hector supermachine in Edinburgh ( I write startx in Cygwin and then I use ssh -Y v1aca...@login.hector.ac.uk ). Everything works fine, the only problem is that the forwarding of the windows is very very slow. Hi Alberto, It would be useful if you could try a non-Cygwin X server (e.g. a Linux or Solaris workstation). If X from under Linux appears fast, then the slowdown could be between your network card and display (probably Cygwin's fault). If X from Linux is also slow, the problem may be with the propagation of the X protocol between your network card and Hector (probably not Cygwin's fault) . You could also try enabling compression with -C. I have found this to be a necessity when connecting with X over ssh between work and home even though the locations are quite near each other and plain text based ssh access runs fine without the compression. -Jeremy -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple
