Date: Thu, 27 Mar 1997 22:23:11 +0900 From: Kenjiro Cho <kjc@csl.sony.co.jp> To: rsvp-test@ISI.EDU Cc: freebsd-hackers@freebsd.org, arl@arl.wustl.edu Subject: ALTQ/CBQ alpha release Message-ID: <199703271323.WAA06023@hotaka.csl.sony.co.jp>
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I am pleased to announce the first public alpha release of ALTQ/CBQ. ALTQ is an alternate queueing framework for BSD Unix, currently built on FreeBSD-2.2.1R. We have ported SUN/UCL/LBL-CBQ onto this framework, which can be used as a traffic control kernel for RSVP. The release includes: alternate queueing support for FreeBSD-2.2.1R kernel CBQ and WFQ implementation tools for CBQ RSVP stubs for CBQ The source code is available at: <ftp://ftp.csl.sony.co.jp/pub/kjc/altq.tar.gz>; or <http://www.csl.sony.co.jp/person/kjc/programs.html>; Note that the CBQ related part is just a port of Sun's RSVP/CBQ. Kenjiro Cho Sony Computer Science Laboratory Inc. -------------------------------------------------------------- ALTQ -- Version 0.2 March 27, 1997 This is an alpha release of Alternate Queueing for BSD Unix. This is ALPHA version in alpha quality, so use it at your own risk! All interfaces are likely to change in the future release. The release includes: alternate queueing support for FreeBSD-2.2.1R kernel CBQ and WFQ implementation tools for CBQ RSVP stubs for CBQ but lacks some of necessary documentation and functions. Some functions are implemented poorly. This release supports only limited network drivers. Supported network cards are: vx: 3Com PCI Ethernet Cards (3C590, 3C595, 3C900, 3C905) de: DEC 21040 PCI Ethernet Controller fxp:Intel EtherExpress Pro/100B PCI Fast Ethernet ep: 3Com 3C509 3C589 ed: Western Digital and SMC 80xx; Novell NE1000 and NE2000; 3Com 3C503 en: Efficient Network Inc. PCI ATM card. Adaptec 155Mbps PCI ATM card. (Chuck Cranor's driver is included in the ALTQ release.) lo: local loop (just for testing) The idea behind this package is to provide better queueing schemes required to realize resource-sharing and quality of service. Currently, the only queueing scheme implemented in BSD Unix is the simple tail-drop FIFO queueing. The BSD Unix systems have no general method to implement alternate queueing schemes, which is the main obstacle to implement a new queueing scheme to BSD Unix. We have designed and implemented a generic alternate queueing framework for the BSD Unix systems, and ported Sun's CBQ onto this framework. The system can be used for resource reservation with the RSVP implementation from ISI. The preliminary performance test result is encouraging; our CBQ implementation is able to handle 100Mbps without noticeable overhead. The goals of this project are three-fold: - to provide a framework to implement better queueing schemes. - to provide a link-sharing test-bed for network operators. - to provide a traffic control kernel to the RSVP community. You can get the latest ALTQ release from <http://www.csl.sony.co.jp/person/kjc/programs.html>; or <ftp://ftp.csl.sony.co.jp/pub/kjc/altq.tar.gz>; For RSVP users: Note that the rsvp stubs are just a port of Sun's RSVP/CBQ. So, it does nothing better than Sun's RSVP. Also note that currently it supports only Controlled-Load Service and takes only bandwidth (rate) parameter to map the flow to a CBQ class. You can find the original Sun's RSVP/CBQ at <ftp://playground.sun.com/pub/rsvp/>; Please don't ask me questions regarding RSVP. There's a mailing-list on RSVP implementation issues <rsvp-test@isi.edu>. To subscribe, you can send mail to "majordomo@isi.edu" with the following command in the body of your email message: "subscribe rsvp-test". For ATM users: The ATM driver is based on bsdatm1.4 <ftp://dworkin.wustl.edu/dist/bsd/bsdatm1.4.tar.gz>; written by Chuck Cranor of Washington University <http://dworkin.wustl.edu/pub/chuck/>. Please get the original distribution and read the included documents for how to setup ATM. Also note that the current ATM driver doesn't support multicast so that some work is necessary to use with RSVP. WFQ: A sample WFQ implementation by Hiroshi Kyusojin of Keio University (kyu@mt.cs.keio.ac.jp). Change to TCP: FreeBSD-2.2 has a problem which resets TCP window size to the default value even when the user specifies the window size. To avoid this problem, "in_addroute() in netinet/in_rmx.c" is modified. A side effect is that TCP doen't save its ssthresh value on close, but it's what other 4.4BSD derived systems do. Send bug reports, suggestions, etc. to kjc@csl.sony.co.jp Kenjiro Cho Sony Computer Science Laboratory Inc. WIDE Project The CBQ related part of the release is derived from the RSVP/CBQ implementation of Sun Microsystems, Inc. The CBQ part is known as SUN/UCL/LBL-CBQ. The README file of the Sun RSVP 0.4.8 release says: Major components of this release were contributed by USC Information Sciences Institute (ISI), MIT Laboratory for Computer Science (LCS), the Xerox Palo Alto Research Center (PARC), Lawrence Berkeley Laboratories (LBL), and University College, London (UCL). We are deeply indebted to these groups for their kind assistance. So, I'm also deeply indebted to these groups. Special thanks to Sally Floyd of Lawrence Berkeley Laboratories, her papers and notes on CBQ are most helpful. --------------------------------------------------------------
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