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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
512 If you say Y here, you will be able to classify packets
513 according to the route table entry they matched.
515 To compile this code as a module, choose M here: the
522 If you say Y here, you will be able to classify packets
523 according to netfilter/firewall marks.
525 To compile this code as a module, choose M here: the
532 Say Y here to be able to classify packets using a universal
535 To compile this code as a module, choose M here: the
542 Say Y here to make u32 gather additional statistics useful for
549 Say Y here to be able to use netfilter marks as u32 key.
555 The Resource Reservation Protocol (RSVP) permits end systems to
559 Say Y here if you want to be able to classify outgoing packets based
562 To compile this code as a module, choose M here: the
569 The Resource Reservation Protocol (RSVP) permits end systems to
573 Say Y here if you want to be able to classify outgoing packets based
576 To compile this code as a module, choose M here: the
583 If you say Y here, you will be able to classify packets based on
587 To compile this code as a module, choose M here: the
596 Say Y here if you want to classify packets based on the control
599 To compile this code as a module, choose M here: the
606 If you say Y here, you will be able to classify packets based on
607 programmable BPF (JIT'ed) filters as an alternative to ematches.
609 To compile this code as a module, choose M here: the module will
616 If you say Y here, you will be able to classify packets based on
619 To compile this code as a module, choose M here: the module will
626 If you say Y here, you will be able to classify packets based on
629 To compile this code as a module, choose M here: the module will
636 Say Y here if you want to use extended matches on top of classifiers
642 A recent version of the iproute2 package is required to use
659 Say Y here if you want to be able to classify packets based on
662 To compile this code as a module, choose M here: the
669 Say Y here if you want to be able to classify packets based on
672 To compile this code as a module, choose M here: the
679 Say Y here if you want to be able to classify packets using
682 To compile this code as a module, choose M here: the
689 Say Y here if you want to be able to classify packets based on
693 To compile this code as a module, choose M here: the
704 Say Y here if you want to be able to classify packets based on
707 To compile this code as a module, choose M here: the
714 Say Y here if you want to be able to classify CAN frames based
717 To compile this code as a module, choose M here: the
724 Say Y here if you want to be able to classify packets based on
727 To compile this code as a module, choose M here: the
734 Say Y here to be able to classify packets based on iptables
739 To compile this code as a module, choose M here: the
746 Say Y here if you want to use traffic control actions. Actions
747 get attached to classifiers and are invoked after a successful
748 classification. They are used to overwrite the classification
751 A recent version of the iproute2 package is required to use
758 Say Y here if you want to do traffic policing, i.e. strict
762 To compile this code as a module, choose M here: the
769 Say Y here to take generic actions such as dropping and
772 To compile this code as a module, choose M here: the
779 Say Y here to use the generic action randomly or deterministically.
785 Say Y here to allow packets to be mirrored or redirected to
788 To compile this code as a module, choose M here: the
796 Say Y here to allow packet sampling tc action. The packet sample
800 To compile this code as a module, choose M here: the
807 Say Y here to be able to invoke iptables targets after successful
810 To compile this code as a module, choose M here: the
817 Say Y here to do stateless NAT on IPv4 packets. You should use
820 To compile this code as a module, choose M here: the
827 Say Y here if you want to mangle the content of packets.
829 To compile this code as a module, choose M here: the
836 Say Y here to add a simple action for demonstration purposes.
839 to the console for every packet that passes by.
843 To compile this code as a module, choose M here: the
850 Say Y here to change skb priority or queue_mapping settings.
854 To compile this code as a module, choose M here: the
862 Say Y here to update some common checksum after some direct
865 To compile this code as a module, choose M here: the
872 Say Y here to push or pop MPLS headers.
876 To compile this code as a module, choose M here: the
883 Say Y here to push or pop vlan headers.
887 To compile this code as a module, choose M here: the
894 Say Y here to execute BPF code on packets. The BPF code will decide
899 To compile this code as a module, choose M here: the
907 Say Y here to allow retrieving of conn mark
911 To compile this code as a module, choose M here: the
919 Say Y here to allow transfer of a connmark stored information.
921 ipv4/v6 diffserv and/or to transfer connmark to packet
928 To compile this code as a module, choose M here: the
935 Say Y here to allow modification of skb data
939 To compile this code as a module, choose M here: the
947 Say Y here to allow for sourcing and terminating metadata
948 For details refer to netdev01 paper:
952 To compile this code as a module, choose M here: the
959 Say Y here to set/release ip tunnel metadata.
963 To compile this code as a module, choose M here: the
970 Say Y here to allow sending the packets to conntrack module.
974 To compile this code as a module, choose M here: the
981 Say Y here to allow to control the ingress flow to be passed at
986 To compile this code as a module, choose M here: the
990 tristate "Support to encoding decoding skb mark on IFE action"
994 tristate "Support to encoding decoding skb prio on IFE action"
998 tristate "Support to encoding decoding skb tcindex on IFE action"
1007 Say Y here to allow tc chain misses to continue in OvS datapath in
1008 the correct recirc_id, and hardware chain misses to continue in