FQ-PIE(8) Linux FQ-PIE(8) (NAME) tc-fq_pie - (FQ-PIE) (SYNOPSIS) tc qdisc ... fq_pie [ limit PACKETS ] [ flows NUMBER ] [ target TIME ] [ tupdate TIME ] [ alpha NUMBER ] [ beta NUMBER ] [ quantum BYTES ] [ memory_limit BYTES ] [ ecn_prob PERCENTAGE ] [ [no]ecn ] [ [no]bytemode ] [ [no_]dq_rate_estimator ] (DESCRIPTION) FQ-PIE ( Flow Queuing with Proportional Integral controller Enhanced ) (AQM) PIE . FQ-PIE (Jenkins hash function) qdisc . PIE . (ALGORITHM) FQ-PIE : (scheduler) (dequeue) PIE AQM . FQ-PIE . PIE . (enqueue) (bucket) . . - (5-tuple) IP IP . PIE . . ( ) (credits) (quantum) . . (dequeue) ( ) . . ( ). PIE . PIE : . ( ) . ( ) . PIE . (PARAMETERS) limit . (drop) . . flows . . . . . target PIE . (15ms) . tupdate (drop probability) . (15ms) . alpha beta alpha beta . . quantum quantum (Deficit Round Robin) . memory_limit . (32Mb) . ecn_prob ECN . . ecn . [no]ecn pie . ecn noecn . [no]bytemode . bytemode nobytemode . bytemode . [no_]dq_rate_estimator dq_rate_estimator (Little's Law) no_dq_rate_estimator (timestamp) . dq_rate_estimator . (EXAMPLES) # tc qdisc add dev eth0 root fq_pie # tc -s qdisc show dev eth0 qdisc fq_pie 8001: root refcnt 2 limit 10240p flows 1024 target 15.0ms tupdate 16.0ms alpha 2 beta 20 quantum 1514b memory_limit 32Mb ecn_prob 10 Sent 159173586 bytes 105261 pkt (dropped 24, overlimits 0 requeues 0) backlog 75700b 50p requeues 0 pkts_in 105311 overlimit 0 overmemory 0 dropped 24 ecn_mark 0 new_flow_count 7332 new_flows_len 0 old_flows_len 4 memory_used 108800 # tc qdisc add dev eth0 root fq_pie dq_rate_estimator # tc -s qdisc show dev eth0 qdisc fq_pie 8001: root refcnt 2 limit 10240p flows 1024 target 15.0ms tupdate 16.0ms alpha 2 beta 20 quantum 1514b memory_limit 32Mb ecn_prob 10 dq_rate_estimator Sent 8263620 bytes 5550 pkt (dropped 4, overlimits 0 requeues 0) backlog 805448b 532p requeues 0 pkts_in 6082 overlimit 0 overmemory 0 dropped 4 ecn_mark 0 new_flow_count 94 new_flows_len 0 old_flows_len 8 memory_used 1157632 (SEE ALSO) tc(8), tc-pie(8), tc-fq_codel(8) (SOURCES) RFC 8033: https://tools.ietf.org/html/rfc8033 (AUTHORS) FQ-PIE Mohit P. Tahiliani . . iproute2 23 January 2020 FQ-PIE(8)