TC(8)                     (August 2011)                     TC(8)

          choke - choose and keep scheduler

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

          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 simi-
          lar to RED.

          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.

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

          o    R. Pan, B. Prabhakar, and K. Psounis, "CHOKe, A State-
               less 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

          tc(8), tc-red(8)

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     TC(8)                     (August 2011)                     TC(8)

          sched_choke was contributed by Stephen Hemminger.

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