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 unre-
sponsive 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.
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 config-
urable 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
The parameters are the same as for RED, except that RED uses bytes
whereas choke counts packets. See tc-red(8) for a description.
o R. Pan, B. Prabhakar, and K. Psounis, "CHOKe, A Stateless Active
Queue Management Scheme for Approximating Fair Bandwidth Alloca-
tion", IEEE INFOCOM, 2000.
o A. Tang, J. Wang, S. Low, "Understanding CHOKe: Throughput and
Spatial Characteristics", IEEE/ACM Transactions on Networking,
sched_choke was contributed by Stephen Hemminger.
iproute2 August 2011 TC(8)
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