Stochastic Fairness Queueing (SFQ)

Collaboration diagram for Stochastic Fairness Queueing (SFQ):

Attribute Access
int	rtnl_sfq_set_quantum (struct rtnl_qdisc *qdisc, int quantum)
	Set quantum of SFQ qdisc. More...
int	rtnl_sfq_get_quantum (struct rtnl_qdisc *qdisc)
	Get quantum of SFQ qdisc. More...
int	rtnl_sfq_set_limit (struct rtnl_qdisc *qdisc, int limit)
	Set limit of SFQ qdisc. More...
int	rtnl_sfq_get_limit (struct rtnl_qdisc *qdisc)
	Get limit of SFQ qdisc. More...
int	rtnl_sfq_set_perturb (struct rtnl_qdisc *qdisc, int perturb)
	Set perturbation interval of SFQ qdisc. More...
int	rtnl_sfq_get_perturb (struct rtnl_qdisc *qdisc)
	Get perturbation interval of SFQ qdisc. More...
int	rtnl_sfq_get_divisor (struct rtnl_qdisc *qdisc)
	Get divisor of SFQ qdisc. More...

Detailed Description

Parameter Description

• Quantum: Number of bytes to send out per slot and round.
• Perturbation: Timer period between changing the hash function.
• Limit: Upper limit of queue in number of packets before SFQ starts dropping packets.
• Divisor: Hash table divisor, i.e. size of hash table.

Function Documentation

int rtnl_sfq_get_divisor

(

struct rtnl_qdisc *

qdisc

)

Get divisor of SFQ qdisc.

• qdisc SFQ qdisc.

  Returns

  Divisor in number of entries or a negative error code.

References NLE_NOATTR, rtnl_sfq::qs_divisor, and rtnl_sfq::qs_mask.

int rtnl_sfq_get_limit

(

struct rtnl_qdisc *

qdisc

)

Get limit of SFQ qdisc.

• qdisc SFQ qdisc.

  Returns

  Limit or a negative error code.

References NLE_NOATTR, rtnl_sfq::qs_limit, and rtnl_sfq::qs_mask.

int rtnl_sfq_get_perturb

(

struct rtnl_qdisc *

qdisc

)

Get perturbation interval of SFQ qdisc.

• qdisc SFQ qdisc.

  Returns

  Perturbation interval in seconds or a negative error code.

References NLE_NOATTR, rtnl_sfq::qs_mask, and rtnl_sfq::qs_perturb.

int rtnl_sfq_get_quantum

(

struct rtnl_qdisc *

qdisc

)

Get quantum of SFQ qdisc.

• qdisc SFQ qdisc.

  Returns

  Quantum in bytes or a negative error code.

References NLE_NOATTR, rtnl_sfq::qs_mask, and rtnl_sfq::qs_quantum.

int rtnl_sfq_set_limit	(	struct rtnl_qdisc *	qdisc,
		int	limit
	)

Set limit of SFQ qdisc.

• qdisc SFQ qdisc to be modified.
• limit New limit in number of packets.

  Returns

  0 on success or a negative error code.

References NLE_NOMEM, rtnl_sfq::qs_limit, and rtnl_sfq::qs_mask.

int rtnl_sfq_set_perturb	(	struct rtnl_qdisc *	qdisc,
		int	perturb
	)

Set perturbation interval of SFQ qdisc.

• qdisc SFQ qdisc to be modified.
• perturb New perturbation interval in seconds.

  Note

  A value of 0 disables perturbation altogether.

  Returns

  0 on success or a negative error code.

References NLE_NOMEM, rtnl_sfq::qs_mask, and rtnl_sfq::qs_perturb.

int rtnl_sfq_set_quantum	(	struct rtnl_qdisc *	qdisc,
		int	quantum
	)

Set quantum of SFQ qdisc.

• qdisc SFQ qdisc to be modified.
• quantum New quantum in bytes.

  Returns

  0 on success or a negative error code.

References NLE_NOMEM, rtnl_sfq::qs_mask, and rtnl_sfq::qs_quantum.