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tc qdisc ... choke limit bytes min bytes max bytes 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 the same as 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, see tc-red(8) for a descrip-
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)