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10 When the kernel has several packets to send out over a network
11 device, it has to decide which ones to send first, which ones to
12 delay, and which ones to drop. This is the job of the queueing
13 disciplines, several different algorithms for how to do this
18 able to choose from among several alternative algorithms which can
19 then be attached to different network devices. This is useful for
21 need a certain minimum data flow rate, or if you need to limit the
23 This code is considered to be experimental.
25 To administer these schedulers, you'll need the user-level utilities
31 This Quality of Service (QoS) support will enable you to use
33 (RSVP) on your Linux router if you also say Y to the corresponding
37 If you say Y here and to "/proc file system" below, you will be able
38 to read status information about packet schedulers from the file
42 can say Y to as many as you like. If unsure, say N now.
51 Say Y here if you want to use the Class-Based Queueing (CBQ) packet
59 say Y here. Then say Y to all the queueing algorithms below that you
60 want to use as leaf disciplines.
62 To compile this code as a module, choose M here: the
68 Say Y here if you want to use the Hierarchical Token Buckets (HTB)
73 HTB is very similar to CBQ regarding its goals however is has
76 To compile this code as a module, choose M here: the
82 Say Y here if you want to use the Hierarchical Fair Service Curve
85 To compile this code as a module, choose M here: the
92 Say Y here if you want to use the ATM pseudo-scheduler. This
95 the flow(s) it is handling to a given virtual circuit.
99 To compile this code as a module, choose M here: the
105 Say Y here if you want to use an n-band priority queue packet
108 To compile this code as a module, choose M here: the
114 Say Y here if you want to use an n-band queue packet scheduler
115 to support devices that have multiple hardware transmit queues.
117 To compile this code as a module, choose M here: the
123 Say Y here if you want to use the Random Early Detection (RED)
128 To compile this code as a module, choose M here: the
134 Say Y here if you want to use the Stochastic Fair Blue (SFB)
139 To compile this code as a module, choose M here: the
145 Say Y here if you want to use the Stochastic Fairness Queueing (SFQ)
150 To compile this code as a module, choose M here: the
156 Say Y here if you want to use the True Link Equalizer (TLE) packet
162 To compile this code as a module, choose M here: the
168 Say Y here if you want to use the Token Bucket Filter (TBF) packet
173 To compile this code as a module, choose M here: the
179 Say Y here if you want to use the Credit Based Shaper (CBS) packet
184 To compile this code as a module, choose M here: the
190 Say Y here if you want to use the Earliest TxTime First (ETF) packet
195 To compile this code as a module, choose M here: the
201 Say Y here if you want to use the Time Aware Priority (taprio) packet
206 To compile this code as a module, choose M here: the
212 Say Y here if you want to use the Generic Random Early Detection
217 To compile this code as a module, choose M here: the
223 Say Y if you want to schedule packets according to the
225 Technical information on this method, with pointers to associated
228 To compile this code as a module, choose M here: the
234 Say Y if you want to emulate network delay, loss, and packet
235 re-ordering. This is often useful to simulate networks when
238 To compile this driver as a module, choose M here: the module
246 Say Y here if you want to use the Deficit Round Robin (DRR) packet
249 To compile this driver as a module, choose M here: the module
257 Say Y here if you want to use the Multi-queue Priority scheduler.
258 This scheduler allows QOS to be offloaded on NICs that have support
261 To compile this driver as a module, choose M here: the module will
269 Say Y here if you want to use the SKB priority queue
270 scheduler. This schedules packets according to skb->priority,
274 To compile this driver as a module, choose M here: the module will
282 Say Y here if you want to use the CHOKe packet scheduler (CHOose
284 flows). This is a variation of RED which trys to penalize flows
287 To compile this code as a module, choose M here: the
293 Say Y here if you want to use the Quick Fair Queueing Scheduler (QFQ)
296 To compile this driver as a module, choose M here: the module
304 Say Y here if you want to use the Controlled Delay (CODEL)
307 To compile this driver as a module, choose M here: the module
315 Say Y here if you want to use the FQ Controlled Delay (FQ_CODEL)
318 To compile this driver as a module, choose M here: the module
326 Say Y here if you want to use the Common Applications Kept Enhanced
329 To compile this driver as a module, choose M here: the module
337 Say Y here if you want to use the FQ packet scheduling algorithm.
339 FQ does flow separation, and is able to respect pacing requirements
343 To compile this driver as a module, choose M here: the module
351 Say Y here if you want to use the Heavy-Hitter Filter (HHF)
354 To compile this driver as a module, choose M here: the module
360 Say Y here if you want to use the Proportional Integral controller
364 To compile this driver as a module, choose M here: the module
373 Say Y here if you want to use the Flow Queue Proportional Integral
377 To compile this driver as a module, choose M here: the module
388 Say Y here if you want to use classifiers for incoming and/or outgoing
390 which can also have actions attached to them. In case of outgoing packets,
392 before real enqueuing to an egress qdisc happens.
396 To compile this code as a module, choose M here: the module will be
403 This queuing discipline allows userspace to plug/unplug a network
406 causes following packets to enqueue until a dequeue command arrives
407 over netlink, causing the plug to be removed and resuming the normal
412 command, only packets up to the first plug are released for delivery.
413 The Remus HA project uses this module to enable speculative execution
414 of virtual machines by allowing the generated network output to be rolled
417 For more information, please refer to <http://wiki.xenproject.org/wiki/Remus>
420 want to protect Xen guests with Remus.
422 To compile this code as a module, choose M here: the
430 qdiscs in one scheduler. ETS makes it easy to configure a set of
431 strict and bandwidth-sharing bands to implement the transmission
434 Say Y here if you want to use the ETS packet scheduling
437 To compile this driver as a module, choose M here: the module
500 Say Y here if you want to be able to classify packets using
503 To compile this code as a module, choose M here: the
510 Say Y here if you want to be able to classify packets based on
512 to implement Differentiated Services together with DSMARK.
514 To compile this code as a module, choose M here: the
523 If you say Y here, you will be able to classify packets
524 according to the route table entry they matched.
526 To compile this code as a module, choose M here: the
533 If you say Y here, you will be able to classify packets
534 according to netfilter/firewall marks.
536 To compile this code as a module, choose M here: the
543 Say Y here to be able to classify packets using a universal
546 To compile this code as a module, choose M here: the
553 Say Y here to make u32 gather additional statistics useful for
560 Say Y here to be able to use netfilter marks as u32 key.
566 The Resource Reservation Protocol (RSVP) permits end systems to
570 Say Y here if you want to be able to classify outgoing packets based
573 To compile this code as a module, choose M here: the
580 The Resource Reservation Protocol (RSVP) permits end systems to
584 Say Y here if you want to be able to classify outgoing packets based
587 To compile this code as a module, choose M here: the
594 If you say Y here, you will be able to classify packets based on
598 To compile this code as a module, choose M here: the
607 Say Y here if you want to classify packets based on the control
610 To compile this code as a module, choose M here: the
617 If you say Y here, you will be able to classify packets based on
618 programmable BPF (JIT'ed) filters as an alternative to ematches.
620 To compile this code as a module, choose M here: the module will
627 If you say Y here, you will be able to classify packets based on
630 To compile this code as a module, choose M here: the module will
637 If you say Y here, you will be able to classify packets based on
640 To compile this code as a module, choose M here: the module will
647 Say Y here if you want to use extended matches on top of classifiers
653 A recent version of the iproute2 package is required to use
670 Say Y here if you want to be able to classify packets based on
673 To compile this code as a module, choose M here: the
680 Say Y here if you want to be able to classify packets based on
683 To compile this code as a module, choose M here: the
690 Say Y here if you want to be able to classify packets using
693 To compile this code as a module, choose M here: the
700 Say Y here if you want to be able to classify packets based on
704 To compile this code as a module, choose M here: the
715 Say Y here if you want to be able to classify packets based on
718 To compile this code as a module, choose M here: the
725 Say Y here if you want to be able to classify CAN frames based
728 To compile this code as a module, choose M here: the
735 Say Y here if you want to be able to classify packets based on
738 To compile this code as a module, choose M here: the
745 Say Y here to be able to classify packets based on iptables
750 To compile this code as a module, choose M here: the
757 Say Y here if you want to use traffic control actions. Actions
758 get attached to classifiers and are invoked after a successful
759 classification. They are used to overwrite the classification
762 A recent version of the iproute2 package is required to use
769 Say Y here if you want to do traffic policing, i.e. strict
773 To compile this code as a module, choose M here: the
780 Say Y here to take generic actions such as dropping and
783 To compile this code as a module, choose M here: the
790 Say Y here to use the generic action randomly or deterministically.
796 Say Y here to allow packets to be mirrored or redirected to
799 To compile this code as a module, choose M here: the
807 Say Y here to allow packet sampling tc action. The packet sample
811 To compile this code as a module, choose M here: the
818 Say Y here to be able to invoke iptables targets after successful
821 To compile this code as a module, choose M here: the
828 Say Y here to do stateless NAT on IPv4 packets. You should use
831 To compile this code as a module, choose M here: the
838 Say Y here if you want to mangle the content of packets.
840 To compile this code as a module, choose M here: the
847 Say Y here to add a simple action for demonstration purposes.
850 to the console for every packet that passes by.
854 To compile this code as a module, choose M here: the
861 Say Y here to change skb priority or queue_mapping settings.
865 To compile this code as a module, choose M here: the
873 Say Y here to update some common checksum after some direct
876 To compile this code as a module, choose M here: the
883 Say Y here to push or pop MPLS headers.
887 To compile this code as a module, choose M here: the
894 Say Y here to push or pop vlan headers.
898 To compile this code as a module, choose M here: the
905 Say Y here to execute BPF code on packets. The BPF code will decide
910 To compile this code as a module, choose M here: the
918 Say Y here to allow retrieving of conn mark
922 To compile this code as a module, choose M here: the
930 Say Y here to allow transfer of a connmark stored information.
932 ipv4/v6 diffserv and/or to transfer connmark to packet
939 To compile this code as a module, choose M here: the
946 Say Y here to allow modification of skb data
950 To compile this code as a module, choose M here: the
958 Say Y here to allow for sourcing and terminating metadata
959 For details refer to netdev01 paper:
963 To compile this code as a module, choose M here: the
970 Say Y here to set/release ip tunnel metadata.
974 To compile this code as a module, choose M here: the
981 Say Y here to allow sending the packets to conntrack module.
985 To compile this code as a module, choose M here: the
992 Say Y here to allow to control the ingress flow to be passed at
997 To compile this code as a module, choose M here: the
1001 tristate "Support to encoding decoding skb mark on IFE action"
1005 tristate "Support to encoding decoding skb prio on IFE action"
1009 tristate "Support to encoding decoding skb tcindex on IFE action"
1018 Say Y here to allow tc chain misses to continue in OvS datapath in
1019 the correct recirc_id, and hardware chain misses to continue in