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64 lines
1.6 KiB
Groff
64 lines
1.6 KiB
Groff
.TH TC 8 "August 2011" "iproute2" "Linux"
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.SH NAME
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choke \- choose and keep scheduler
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.SH SYNOPSIS
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.B tc qdisc ... choke
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.B limit
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packets
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.B min
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packets
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.B max
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packets
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.B avpkt
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bytes
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.B burst
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packets
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.B [ ecn ] [ bandwidth
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rate
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.B ] probability
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chance
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.SH DESCRIPTION
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CHOKe (CHOose and Keep for responsive flows, CHOose and Kill for unresponsive flows)
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is a classless qdisc designed to both identify and penalize flows that monopolize the
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queue. CHOKe is a variation of RED, and the configuration is similar to RED.
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.SH ALGORITHM
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Once the queue hits a certain average length, a random packet is drawn from the
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queue. If both the to-be-queued and the drawn packet belong to the same flow,
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both packets are dropped. Otherwise, if the queue length is still below the maximum length,
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the new packet has a configurable chance of being marked (which may mean dropped).
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If the queue length exceeds
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.BR max ,
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the new packet will always be marked (or dropped).
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If the queue length exceeds
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.BR limit ,
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the new packet is always dropped.
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The marking probability computation is the same as used by the RED qdisc.
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.SH PARAMETERS
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The parameters are the same as for RED, except that RED uses bytes whereas choke
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counts packets. See
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.BR tc-red (8)
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for a description.
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.SH SOURCE
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.TP
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o
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R. Pan, B. Prabhakar, and K. Psounis, "CHOKe, A Stateless
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Active Queue Management Scheme for Approximating Fair Bandwidth Allocation",
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IEEE INFOCOM, 2000.
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.TP
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o
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A. Tang, J. Wang, S. Low, "Understanding CHOKe: Throughput and Spatial
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Characteristics", IEEE/ACM Transactions on Networking, 2004
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.SH SEE ALSO
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.BR tc (8),
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.BR tc-red (8)
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.SH AUTHOR
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sched_choke was contributed by Stephen Hemminger.
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