Dummynet and bursting!

[Javier -]

OK, but with increased burst to 5mbytes i have same results.

will try fresh install from freebsd (no pfsense), and the results will be posted later.

 

Thanks!

 

---------------------------------------------------------------

Transfer estimates are completely unreliable in general,
you need time for tcp to open the window, plus the RTT
of the connection influences the throughput, etc.
 
You can perhaps make some reasonable test by setting a low
bandwidth. Burst seems to work fine here (on stable/9), see below
 
--- no pipes, no nothing ---
 > ping localhost
 PING localhost (127.0.0.1): 56 data bytes
 64 bytes from 127.0.0.1: icmp_seq=0 ttl=64 time=0.079 ms
 64 bytes from 127.0.0.1: icmp_seq=1 ttl=64 time=0.064 ms
 ^C
 
--- one 10Kbit/s pipe, no burst ---
 > sudo ipfw add 100 pipe 1 proto icmp out
 00100 pipe 1 ip from any to any proto icmp out
 > sudo ipfw pipe 1 config bw 10Kbit/s burst 0
 > sudo ipfw pipe show
 00001: 10.000 Kbit/s 0 ms burst 0 
q131073 50 sl. 0 flows (1 buckets) sched 65537 weight 0 lmax 0 pri 0 droptail
 sched 65537 type FIFO flags 0x0 0 buckets 0 active
 > ping localhost
 PING localhost (127.0.0.1): 56 data bytes
 64 bytes from 127.0.0.1: icmp_seq=0 ttl=64 time=134.602 ms
 64 bytes from 127.0.0.1: icmp_seq=1 ttl=64 time=135.011 ms
 64 bytes from 127.0.0.1: icmp_seq=2 ttl=64 time=135.019 ms
 ^C
 
--- now increase the burst to 100Kbytes ---
 > sudo ipfw pipe 1 config bw 10Kbit/s burst 100K
 > sudo ipfw pipe show
 00001: 10.000 Kbit/s 0 ms burst 102400 
q131073 50 sl. 0 flows (1 buckets) sched 65537 weight 0 lmax 0 pri 0 droptail
 sched 65537 type FIFO flags 0x0 0 buckets 0 active
 > ping localhost
 PING localhost (127.0.0.1): 56 data bytes
 64 bytes from 127.0.0.1: icmp_seq=0 ttl=64 time=0.070 ms
 64 bytes from 127.0.0.1: icmp_seq=1 ttl=64 time=0.083 ms
 64 bytes from 127.0.0.1: icmp_seq=2 ttl=64 time=0.066 ms
 ^C
 
cheers
luigi
----------------------------------------
> Date: Fri, 27 Apr 2012 13:49:41 +0200
> From: rizzo at iet.unipi.it
> To: javier_9185 at hotmail.com
> CC: freebsd-ipfw at freebsd.org
> Subject: Re: Dummynet and bursting!
>
> On Fri, Apr 27, 2012 at 10:50:17AM +0000, Javier - wrote:
> >
> > I want to leave at cable speed n bytes, after n bytes apply the queue bw limit...
>
> and what are you seeing instead ? Do you have a trace or
> something that shows that it does not work like this ?
>
> cheers
> luigi
>
> > In Linux with htb this is done with cburst parameter...
> >
> >
> >
> > Regards!
> >
> >
> > > Date: Fri, 27 Apr 2012 08:55:23 +0200
> > > From: rizzo at iet.unipi.it
> > > To: javier_9185 at hotmail.com
> > > CC: freebsd-ipfw at freebsd.org
> > > Subject: Re: Dummynet and bursting!
> > >
> > > On Fri, Apr 27, 2012 at 04:57:20AM +0000, Javier - wrote:
> > > >
> > > >
> > > >
> > > >
> > > > Hello all!, i?m researching about bursting with dummynet?s pipes. i can?t find the way in order to make the burst paramter work under pipe command;pipe config ........ burst 500000 (500Kbytes)->not luck pipe config ........ burst 500000 queue 500Kbytes ->not luck These parameters seems to be ok under pipe show, but no effect on real escenario... traffic is anyway at same speed defiined by "bw". Any help/comment wll be appreciated...specially from Luigi! Is he alive on the list? Regards! _______________________________________________
> > >
> > > can you clarify what you are expecting and what you are seeing ?
> > >
> > > cheers
> > > luigi