tc-choke(8)


NAME

   choke - choose and keep scheduler

SYNOPSIS

   tc  qdisc  ...  choke limit packets min packets max packets avpkt bytes
   burst packets [ ecn ] [ bandwidth rate ] probability chance

DESCRIPTION

   CHOKe (CHOose and Keep  for  responsive  flows,  CHOose  and  Kill  for
   unresponsive  flows) is a classless qdisc designed to both identify and
   penalize flows that monopolize the queue. CHOKe is a variation of  RED,
   and the configuration is similar to RED.

ALGORITHM

   Once  the queue hits a certain average length, a random packet is drawn
   from the queue. If both the to-be-queued and the drawn packet belong to
   the same flow, both packets are dropped. Otherwise, if the queue length
   is still below the maximum length, the new packet  has  a  configurable
   chance  of  being marked (which may mean dropped).  If the queue length
   exceeds max, the new packet will always be marked (or dropped).  If the
   queue length exceeds limit, the new packet is always dropped.

   The  marking  probability  computation  is  the same as used by the RED
   qdisc.

PARAMETERS

   The parameters are the same as for RED,  except  that  RED  uses  bytes
   whereas choke counts packets. See tc-red(8) for a description.

SOURCE

   o      R. Pan, B. Prabhakar, and K. Psounis, "CHOKe, A Stateless Active
          Queue  Management  Scheme  for  Approximating   Fair   Bandwidth
          Allocation", IEEE INFOCOM, 2000.

   o      A.  Tang,  J. Wang, S. Low, "Understanding CHOKe: Throughput and
          Spatial Characteristics", IEEE/ACM Transactions  on  Networking,
          2004

SEE ALSO

   tc(8), tc-red(8)

AUTHOR

   sched_choke was contributed by Stephen Hemminger.





Opportunity


Personal Opportunity - Free software gives you access to billions of dollars of software at no cost. Use this software for your business, personal use or to develop a profitable skill. Access to source code provides access to a level of capabilities/information that companies protect though copyrights. Open source is a core component of the Internet and it is available to you. Leverage the billions of dollars in resources and capabilities to build a career, establish a business or change the world. The potential is endless for those who understand the opportunity.

Business Opportunity - Goldman Sachs, IBM and countless large corporations are leveraging open source to reduce costs, develop products and increase their bottom lines. Learn what these companies know about open source and how open source can give you the advantage.





Free Software


Free Software provides computer programs and capabilities at no cost but more importantly, it provides the freedom to run, edit, contribute to, and share the software. The importance of free software is a matter of access, not price. Software at no cost is a benefit but ownership rights to the software and source code is far more significant.


Free Office Software - The Libre Office suite provides top desktop productivity tools for free. This includes, a word processor, spreadsheet, presentation engine, drawing and flowcharting, database and math applications. Libre Office is available for Linux or Windows.





Free Books


The Free Books Library is a collection of thousands of the most popular public domain books in an online readable format. The collection includes great classical literature and more recent works where the U.S. copyright has expired. These books are yours to read and use without restrictions.


Source Code - Want to change a program or know how it works? Open Source provides the source code for its programs so that anyone can use, modify or learn how to write those programs themselves. Visit the GNU source code repositories to download the source.





Education


Study at Harvard, Stanford or MIT - Open edX provides free online courses from Harvard, MIT, Columbia, UC Berkeley and other top Universities. Hundreds of courses for almost all major subjects and course levels. Open edx also offers some paid courses and selected certifications.


Linux Manual Pages - A man or manual page is a form of software documentation found on Linux/Unix operating systems. Topics covered include computer programs (including library and system calls), formal standards and conventions, and even abstract concepts.