Re: AltQ

[Chris Cappuccio <chris@dqc.org>]

I ported ALTQ to OpenBSD several months ago, based mostly on the code used to
run ALTQ on NetBSD.  I submitted this back to the author, through his work it
evolved along with several other parts of ALTQ to become version 2.1.

I asked Kenjiro Cho, author of ALTQ, why not do its work at ether_input() and
ether_output(), and he said:

"Packet scheduling should be done from a driver interrupts (tx complete
interrupts) and it is if_start (xx_start in the driver) in the BSD systems."

On Mon, 24 Jan 2000, Thierry Deval wrote:

 | OK, my best best would be to base alt-q on bpf, or maybe just under it.
 | 
 | I'll look at all this HUGE networking code, and see were AltQ could fit.
 | Any suggestion from you gurus are welcome. And when I come back with something,
 | there will certainly be a need for deep cleaning ;-)
 | 
 | CYA
 | 
 |   Thierry
 | 
 | On 24-Jan-00 ark@eltex.ru wrote:
 | > -----BEGIN PGP SIGNED MESSAGE-----
 | > 
 | > nuqneH,
 | > 
 | > That's the reason i never use AltQ on my machines: i just don't like the
 | > way it works and this way creates enormous amount of kernel changes.
 | > 
 | > There is a thing that looks much better, called dummynet, but it is
 | > freebsd-only and even worse, requires ipfw to work. There were some 
 | > discussions about porting it to ipfilter, but nobody actually tried..
 | > 
 | > We have no acceptable traffic shaper for now :(
 | > 
 | > Theo de Raadt <deraadt@cvs.openbsd.org> said :
 | > 
 | >> > Is there any project of integrating the AltQ development
 | >> > (http://www.csl.sony.co.jp/~kjc/software.html) into our source tree ?
 | >> > 
 | >> > I think it might be a usefull addition to the system.
 | >> > It may be of great interest to ISPs and small-to-large office managers :-)
 | >> 
 | >> I am concerned that the current code will require changes to every single
 | >> network device driver in the source tree.
 | >> 
 | > 
 | > 
 | >                                      _     _  _  _  _      _  _
 | >  {::} {::} {::}  CU in Hell          _| o |_ | | _|| |   / _||_|   |_ |_ |_
 | >  (##) (##) (##)        /Arkan#iD    |_  o  _||_| _||_| /   _|  | o |_||_||_|
 | >  [||] [||] [||]            Do i believe in Bible? Hell,man,i've seen one!
 | > 
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 | > Charset: noconv
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 | > iQCVAwUBOIxo0qH/mIJW9LeBAQFTbAP/e9DX0QJqfTftFuSNjKXaeLn5Tn7ljiXJ
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 | > =wsJA
 | > -----END PGP SIGNATURE-----
 | 
 | ----------------------------------
 | E-Mail: Thierry Deval <TDeval@PrimeOBJ.COM>
 | Date: 24-Jan-00
 | Time: 19:37:32
 | 
 |          Prime Objective
 |    OpenBSD - Linux - Windows NT
 |  OO Development - Network Systems
 | ----------------------------------
 | 

---
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