e13e02a3c6
This is the Stochastic Fair Blue scheduler, based on work from : W. Feng, D. Kandlur, D. Saha, K. Shin. Blue: A New Class of Active Queue Management Algorithms. U. Michigan CSE-TR-387-99, April 1999. http://www.thefengs.com/wuchang/blue/CSE-TR-387-99.pdf This implementation is based on work done by Juliusz Chroboczek General SFB algorithm can be found in figure 14, page 15: B[l][n] : L x N array of bins (L levels, N bins per level) enqueue() Calculate hash function values h{0}, h{1}, .. h{L-1} Update bins at each level for i = 0 to L - 1 if (B[i][h{i}].qlen > bin_size) B[i][h{i}].p_mark += p_increment; else if (B[i][h{i}].qlen == 0) B[i][h{i}].p_mark -= p_decrement; p_min = min(B[0][h{0}].p_mark ... B[L-1][h{L-1}].p_mark); if (p_min == 1.0) ratelimit(); else mark/drop with probabilty p_min; I did the adaptation of Juliusz code to meet current kernel standards, and various changes to address previous comments : http://thread.gmane.org/gmane.linux.network/90225 http://thread.gmane.org/gmane.linux.network/90375 Default flow classifier is the rxhash introduced by RPS in 2.6.35, but we can use an external flow classifier if wanted. tc qdisc add dev $DEV parent 1:11 handle 11: \ est 0.5sec 2sec sfb limit 128 tc filter add dev $DEV protocol ip parent 11: handle 3 \ flow hash keys dst divisor 1024 Notes: 1) SFB default child qdisc is pfifo_fast. It can be changed by another qdisc but a child qdisc MUST not drop a packet previously queued. This is because SFB needs to handle a dequeued packet in order to maintain its virtual queue states. pfifo_head_drop or CHOKe should not be used. 2) ECN is enabled by default, unlike RED/CHOKe/GRED With help from Patrick McHardy & Andi Kleen Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> CC: Juliusz Chroboczek <Juliusz.Chroboczek@pps.jussieu.fr> CC: Stephen Hemminger <shemminger@vyatta.com> CC: Patrick McHardy <kaber@trash.net> CC: Andi Kleen <andi@firstfloor.org> CC: John W. Linville <linville@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
54 lines
2 KiB
Makefile
54 lines
2 KiB
Makefile
#
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# Makefile for the Linux Traffic Control Unit.
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#
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obj-y := sch_generic.o sch_mq.o
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obj-$(CONFIG_NET_SCHED) += sch_api.o sch_blackhole.o
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obj-$(CONFIG_NET_CLS) += cls_api.o
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obj-$(CONFIG_NET_CLS_ACT) += act_api.o
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obj-$(CONFIG_NET_ACT_POLICE) += act_police.o
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obj-$(CONFIG_NET_ACT_GACT) += act_gact.o
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obj-$(CONFIG_NET_ACT_MIRRED) += act_mirred.o
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obj-$(CONFIG_NET_ACT_IPT) += act_ipt.o
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obj-$(CONFIG_NET_ACT_NAT) += act_nat.o
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obj-$(CONFIG_NET_ACT_PEDIT) += act_pedit.o
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obj-$(CONFIG_NET_ACT_SIMP) += act_simple.o
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obj-$(CONFIG_NET_ACT_SKBEDIT) += act_skbedit.o
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obj-$(CONFIG_NET_ACT_CSUM) += act_csum.o
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obj-$(CONFIG_NET_SCH_FIFO) += sch_fifo.o
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obj-$(CONFIG_NET_SCH_CBQ) += sch_cbq.o
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obj-$(CONFIG_NET_SCH_HTB) += sch_htb.o
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obj-$(CONFIG_NET_SCH_HFSC) += sch_hfsc.o
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obj-$(CONFIG_NET_SCH_RED) += sch_red.o
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obj-$(CONFIG_NET_SCH_GRED) += sch_gred.o
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obj-$(CONFIG_NET_SCH_INGRESS) += sch_ingress.o
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obj-$(CONFIG_NET_SCH_DSMARK) += sch_dsmark.o
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obj-$(CONFIG_NET_SCH_SFB) += sch_sfb.o
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obj-$(CONFIG_NET_SCH_SFQ) += sch_sfq.o
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obj-$(CONFIG_NET_SCH_TBF) += sch_tbf.o
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obj-$(CONFIG_NET_SCH_TEQL) += sch_teql.o
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obj-$(CONFIG_NET_SCH_PRIO) += sch_prio.o
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obj-$(CONFIG_NET_SCH_MULTIQ) += sch_multiq.o
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obj-$(CONFIG_NET_SCH_ATM) += sch_atm.o
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obj-$(CONFIG_NET_SCH_NETEM) += sch_netem.o
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obj-$(CONFIG_NET_SCH_DRR) += sch_drr.o
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obj-$(CONFIG_NET_SCH_MQPRIO) += sch_mqprio.o
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obj-$(CONFIG_NET_SCH_CHOKE) += sch_choke.o
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obj-$(CONFIG_NET_CLS_U32) += cls_u32.o
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obj-$(CONFIG_NET_CLS_ROUTE4) += cls_route.o
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obj-$(CONFIG_NET_CLS_FW) += cls_fw.o
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obj-$(CONFIG_NET_CLS_RSVP) += cls_rsvp.o
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obj-$(CONFIG_NET_CLS_TCINDEX) += cls_tcindex.o
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obj-$(CONFIG_NET_CLS_RSVP6) += cls_rsvp6.o
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obj-$(CONFIG_NET_CLS_BASIC) += cls_basic.o
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obj-$(CONFIG_NET_CLS_FLOW) += cls_flow.o
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obj-$(CONFIG_NET_CLS_CGROUP) += cls_cgroup.o
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obj-$(CONFIG_NET_EMATCH) += ematch.o
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obj-$(CONFIG_NET_EMATCH_CMP) += em_cmp.o
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obj-$(CONFIG_NET_EMATCH_NBYTE) += em_nbyte.o
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obj-$(CONFIG_NET_EMATCH_U32) += em_u32.o
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obj-$(CONFIG_NET_EMATCH_META) += em_meta.o
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obj-$(CONFIG_NET_EMATCH_TEXT) += em_text.o
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