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Commit 0545a303 authored by stephen hemminger's avatar stephen hemminger Committed by David S. Miller
Browse files

pkt_sched: QFQ - quick fair queue scheduler 



This is an implementation of the Quick Fair Queue scheduler developed
by Fabio Checconi. The same algorithm is already implemented in ipfw
in FreeBSD. Fabio had an earlier version developed on Linux, I just
cleaned it up.  Thanks to Eric Dumazet for testing this under load.

Signed-off-by: default avatarStephen Hemminger <shemminger@vyatta.com>
Signed-off-by: default avatarEric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent fc3e5941

include/linux/pkt_sched.h

+15 −0
Original line number Diff line number Diff line
@@ -588,4 +588,19 @@ struct tc_sfb_xstats { 


#define SFB_MAX_PROB 0xFFFF



/* QFQ */

enum {

	TCA_QFQ_UNSPEC,

	TCA_QFQ_WEIGHT,

	TCA_QFQ_LMAX,

	__TCA_QFQ_MAX

};



#define TCA_QFQ_MAX	(__TCA_QFQ_MAX - 1)



struct tc_qfq_stats {

	__u32 weight;

	__u32 lmax;

};



#endif

net/sched/Kconfig

+11 −0
Original line number Diff line number Diff line
@@ -239,6 +239,17 @@ config NET_SCH_CHOKE 
	  To compile this code as a module, choose M here: the

	  module will be called sch_choke.



config NET_SCH_QFQ

	tristate "Quick Fair Queueing scheduler (QFQ)"

	help

	  Say Y here if you want to use the Quick Fair Queueing Scheduler (QFQ)

	  packet scheduling algorithm.



	  To compile this driver as a module, choose M here: the module

	  will be called sch_qfq.



	  If unsure, say N.



config NET_SCH_INGRESS

	tristate "Ingress Qdisc"

	depends on NET_CLS_ACT

net/sched/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -35,6 +35,7 @@ obj-$(CONFIG_NET_SCH_NETEM) += sch_netem.o 
obj-$(CONFIG_NET_SCH_DRR)	+= sch_drr.o

obj-$(CONFIG_NET_SCH_MQPRIO)	+= sch_mqprio.o

obj-$(CONFIG_NET_SCH_CHOKE)	+= sch_choke.o

obj-$(CONFIG_NET_SCH_QFQ)	+= sch_qfq.o



obj-$(CONFIG_NET_CLS_U32)	+= cls_u32.o

obj-$(CONFIG_NET_CLS_ROUTE4)	+= cls_route.o

net/sched/sch_qfq.c

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