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pkt_sched: QFQ - quick fair queue scheduler

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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: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
stephen hemminger 2011-04-04 05:30:58 +00:00 committed by David S. Miller
parent fc3e594124
commit 0545a30377
4 changed files with 1164 additions and 0 deletions
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15
include/linux/pkt_sched.h
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@ -588,4 +588,19 @@ struct tc_sfb_xstats {
#define SFB_MAX_PROB 0xFFFF #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 #endif

11
net/sched/Kconfig
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@ -239,6 +239,17 @@ config NET_SCH_CHOKE
To compile this code as a module, choose M here: the To compile this code as a module, choose M here: the
module will be called sch_choke. 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 config NET_SCH_INGRESS
tristate "Ingress Qdisc" tristate "Ingress Qdisc"
depends on NET_CLS_ACT depends on NET_CLS_ACT

1
net/sched/Makefile
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@ -35,6 +35,7 @@ obj-$(CONFIG_NET_SCH_NETEM) += sch_netem.o
obj-$(CONFIG_NET_SCH_DRR) += sch_drr.o obj-$(CONFIG_NET_SCH_DRR) += sch_drr.o
obj-$(CONFIG_NET_SCH_MQPRIO) += sch_mqprio.o obj-$(CONFIG_NET_SCH_MQPRIO) += sch_mqprio.o
obj-$(CONFIG_NET_SCH_CHOKE) += sch_choke.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_U32) += cls_u32.o
obj-$(CONFIG_NET_CLS_ROUTE4) += cls_route.o obj-$(CONFIG_NET_CLS_ROUTE4) += cls_route.o

1137
net/sched/sch_qfq.c Normal file
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