Re: raise max value for tcp autosizing buffer [WAS: misc@ network tuning for high bandwidth and high latency]

2011-12-25 Thread Sebastian Reitenbach
Hi, On Monday, December 5, 2011 10:53 CET, "Sebastian Reitenbach" wrote: > On Sunday, December 4, 2011 21:01 CET, Mark Kettenis > wrote: > > > > Date: Sun, 4 Dec 2011 15:10:56 +0100 > > > From: Claudio Jeker > > > > > > On Sun, Dec 04, 2011 at 01:35:33PM +0100, Sebastian Reitenbach wro

Re: raise max value for tcp autosizing buffer [WAS: misc@ network tuning for high bandwidth and high latency]

2011-12-05 Thread Henning Brauer
* Geoff Steckel [2011-12-05 16:32]: > On 12/05/2011 05:25 AM, Kevin Chadwick wrote: > >On Mon, 05 Dec 2011 10:53:00 +0100 > >"Sebastian Reitenbach" wrote: > > > >>So to be able to shoot myself in the foot without the need to compile the > >>kernel, I'll look into adding a sysctl to tweak the maxi

Re: raise max value for tcp autosizing buffer [WAS: misc@ network tuning for high bandwidth and high latency]

2011-12-05 Thread Geoff Steckel
On 12/05/2011 05:25 AM, Kevin Chadwick wrote: On Mon, 05 Dec 2011 10:53:00 +0100 "Sebastian Reitenbach" wrote: So to be able to shoot myself in the foot without the need to compile the kernel, I'll look into adding a sysctl to tweak the maximum size of the buffer. Well, depending on time and

Re: raise max value for tcp autosizing buffer [WAS: misc@ network tuning for high bandwidth and high latency]

2011-12-05 Thread Claudio Jeker
On Mon, Dec 05, 2011 at 10:25:14AM +, Kevin Chadwick wrote: > On Mon, 05 Dec 2011 10:53:00 +0100 > "Sebastian Reitenbach" wrote: > > > So to be able to shoot myself in the foot without the need to compile the > > kernel, I'll look into adding a sysctl to tweak the maximum size of the > > buf

Re: raise max value for tcp autosizing buffer [WAS: misc@ network tuning for high bandwidth and high latency]

2011-12-05 Thread Henning Brauer
* Mark Kettenis [2011-12-04 21:02]: > But 256k simply isn't enough for some use cases. Turning this into a > sysctl tunable like FreeBSD and NetBSD would be a good idea if you ask > me. Yes, people will use it to shoot themselves in the foot. I don't > care. I agree. -- Henning Brauer, h...@

Re: raise max value for tcp autosizing buffer [WAS: misc@ network tuning for high bandwidth and high latency]

2011-12-05 Thread Kevin Chadwick
On Mon, 05 Dec 2011 10:53:00 +0100 "Sebastian Reitenbach" wrote: > So to be able to shoot myself in the foot without the need to compile the > kernel, I'll look into adding a sysctl to tweak the maximum size of the > buffer. Well, depending on time and how fast I figure out how to do that, > mi

Re: raise max value for tcp autosizing buffer [WAS: misc@ network tuning for high bandwidth and high latency]

2011-12-05 Thread Sebastian Reitenbach
On Sunday, December 4, 2011 21:01 CET, Mark Kettenis wrote: > > Date: Sun, 4 Dec 2011 15:10:56 +0100 > > From: Claudio Jeker > > > > On Sun, Dec 04, 2011 at 01:35:33PM +0100, Sebastian Reitenbach wrote: > > > On Sunday, December 4, 2011 13:24 CET, Camiel Dobbelaar > > > wrote: > > > > >

Re: raise max value for tcp autosizing buffer [WAS: misc@ network tuning for high bandwidth and high latency]

2011-12-04 Thread Mark Kettenis
> Date: Sun, 4 Dec 2011 15:10:56 +0100 > From: Claudio Jeker > > On Sun, Dec 04, 2011 at 01:35:33PM +0100, Sebastian Reitenbach wrote: > > On Sunday, December 4, 2011 13:24 CET, Camiel Dobbelaar > > wrote: > > > > > On 4-12-2011 13:01, Sebastian Reitenbach wrote: > > > > the default maximum

Re: raise max value for tcp autosizing buffer [WAS: misc@ network tuning for high bandwidth and high latency]

2011-12-04 Thread Henning Brauer
* Geoff Steckel [2011-12-04 16:17]: > To generalize this problem: kernel memory is limited. It is > autosized at boot time. that might have been true a decade ago, but not today. -- Henning Brauer, h...@bsws.de, henn...@openbsd.org BS Web Services, http://bsws.de, Full-Service ISP Secure Hostin

Re: raise max value for tcp autosizing buffer [WAS: misc@ network tuning for high bandwidth and high latency]

2011-12-04 Thread Geoff Steckel
On 12/04/2011 09:10 AM, Claudio Jeker wrote: On Sun, Dec 04, 2011 at 01:35:33PM +0100, Sebastian Reitenbach wrote: On Sunday, December 4, 2011 13:24 CET, Camiel Dobbelaar wrote: On 4-12-2011 13:01, Sebastian Reitenbach wrote: the default maximum size of the tcp send and receive buffer used b

Re: raise max value for tcp autosizing buffer [WAS: misc@ network tuning for high bandwidth and high latency]

2011-12-04 Thread Claudio Jeker
On Sun, Dec 04, 2011 at 01:35:33PM +0100, Sebastian Reitenbach wrote: > On Sunday, December 4, 2011 13:24 CET, Camiel Dobbelaar > wrote: > > > On 4-12-2011 13:01, Sebastian Reitenbach wrote: > > > the default maximum size of the tcp send and receive buffer used by the > > > autosizing algorit

Re: raise max value for tcp autosizing buffer [WAS: misc@ network tuning for high bandwidth and high latency]

2011-12-04 Thread Sebastian Reitenbach
On Sunday, December 4, 2011 13:24 CET, Camiel Dobbelaar wrote: > On 4-12-2011 13:01, Sebastian Reitenbach wrote: > > the default maximum size of the tcp send and receive buffer used by the > > autosizing algorithm is way too small, when trying to get maximum speed > > with high bandwidth and

Re: raise max value for tcp autosizing buffer [WAS: misc@ network tuning for high bandwidth and high latency]

2011-12-04 Thread Camiel Dobbelaar
On 4-12-2011 13:01, Sebastian Reitenbach wrote: > the default maximum size of the tcp send and receive buffer used by the > autosizing algorithm is way too small, when trying to get maximum speed with > high bandwidth and high latency connections. I have tweaked SB_MAX on a system too, but it wa

raise max value for tcp autosizing buffer [WAS: misc@ network tuning for high bandwidth and high latency]

2011-12-04 Thread Sebastian Reitenbach
Hi, the default maximum size of the tcp send and receive buffer used by the autosizing algorithm is way too small, when trying to get maximum speed with high bandwidth and high latency connections. I tested to get the best speed with a connection between Germany and Canada, ping times around 1