Date: Mon, 13 Feb 2012 16:32:31 +0100 From: Peter Olsson <pol@leissner.se> To: Ivan Voras <ivoras@freebsd.org> Cc: freebsd-stable@freebsd.org Subject: Re: Tuning needed for slow RDP FreeBSD 9 -> Win 2008 R2 Message-ID: <20120213153231.GW53927@pol-server.leissner.se> In-Reply-To: <jhb92h$igc$1@dough.gmane.org> References: <20120213015013.GA71062@pol-server.leissner.se> <jhb92h$igc$1@dough.gmane.org>
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On Mon, Feb 13, 2012 at 04:09:05PM +0100, Ivan Voras wrote: > On 13/02/2012 02:50, Peter Olsson wrote: > > Desktop: FreeBSD 9.0-RELEASE amd64, generic kernel, > > running Openbox. My WAN is about 1.2 Mbps, and I try > > to run RDP to windows servers beyond my WAN. > > > > RDP to a Windows Server 2003 SP2 is fast and works > > without problems. > > > > RDP to a Windows Server 2008 R2 is very slow, > > and sometimes just disconnects. > > > > I tried changing a couple of net.inet.tcp sysctl: > > > Nothing has helped, do you have any ideas what I > > should tune? > > It is highly unlikely that any network tuning will help here - this is > almost certainly an application-level problem. > > For what it's worth, I'm using rdesktop to a Win2k8 R2 server without > any lag other problems. I have a colleague who runs Crunchbang (ie Debian) desktop. He had exactly the same performance problem until he used these sysctl: net.core.rmem_max=1048576 net.core.rmem_default=1048576 net.core.wmem_max=1048576 net.core.wmem_default=1048576 net.ipv4.tcp_rmem=1048576 1048576 3444736 net.ipv4.tcp_wmem=1048576 1048576 3444736 I don't know where he got those values, or what they could be translated to in FreeBSD, but they did solve the problem for him. That's why I'm hoping to find a similar sysctl solution for FreeBSD. I did sysctl -a | grep mem and grep buf, but find nothing obvious, except the net.inet.tcp.recvbuf and sendbuf values I have already tried changing. Also, I run Win7 in Virtualbox in my desktop, and from that Win7 I don't have the performance problem towards that RDP server. -- Peter Olsson pol@leissner.se
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