Re: dummynet = local taffic > 100ms - help!

2004-02-11 Thread Bruce Evans
On Wed, 11 Feb 2004, Andre Oppermann wrote: > Richard Wendland wrote: > > Tom Pavel sent some patches to this list on 14 Jan 2004 that he has been > > using to overcome this HZ/RFC1323 problem. > > I remember some comments (by BDE?) to the effect that the patch is not > entirely correct. It was j

Re: dummynet = local taffic > 100ms - help!

2004-02-11 Thread Mike Silbersack
On Wed, 11 Feb 2004, Richard Wendland wrote: > Well, with HZ=1 RFC1323 TCP connections will stop after 59.7 hours, > with HZ=10 after 6 hours. For those with long running TCP connections > (eg remote backup) that could be a big deal. See 4.2.3 of RFC1323. > > It does seem quite a few pe

Re: dummynet = local taffic > 100ms - help!

2004-02-11 Thread Andre Oppermann
Richard Wendland wrote: > > > It breaks TCP Timestamp generation slightly, but that's not likely to > > break much of anything in practice. > > Well, with HZ=1 RFC1323 TCP connections will stop after 59.7 hours, > with HZ=10 after 6 hours. For those with long running TCP connections > (e

Re: dummynet = local taffic > 100ms - help!

2004-02-11 Thread Richard Wendland
> It breaks TCP Timestamp generation slightly, but that's not likely to > break much of anything in practice. Well, with HZ=1 RFC1323 TCP connections will stop after 59.7 hours, with HZ=10 after 6 hours. For those with long running TCP connections (eg remote backup) that could be a big de

Re: dummynet = local taffic > 100ms - help!

2004-02-11 Thread Tony Frank
Hi, On Tue, Feb 10, 2004 at 02:08:57PM +0100, Bjorn Eikeland wrote: > >>Any suggestions what can be causing this? (I've only got the one nic, > >>and use a adsl router for internett) > >You might also consider increasing the queue length of your pipes when > >using prioriziation--- are you seeing

Re: dummynet = local taffic > 100ms - help!

2004-02-11 Thread Mike Silbersack
On Tue, 10 Feb 2004, Chuck Swiger wrote: > I seem to recall some issues with setting HZ very fast, in that it breaks the > uniqueness assumptions made by TCP sequence generation if HZ > 1000. Dummynet > does want better than the standard 10ms granularity (HZ=100), so perhaps you > might try HZ=1