load_balance_t_ Struct Reference

The FIB DPO provieds;. More...

Collaboration diagram for load_balance_t_:

Data Fields
u16	lb_n_buckets
	number of buckets in the load-balance. More...
u16	lb_n_buckets_minus_1
	number of buckets in the load-balance - 1. More...
dpo_proto_t	lb_proto
	The protocol of packets that traverse this LB. More...
u32	lb_locks
	The number of locks, which is approximately the number of users, of this load-balance. More...
index_t	lb_map
	index of the load-balance map, INVALID if this LB does not use one More...
index_t	lb_urpf
	This is the index of the uRPF list for this LB. More...
flow_hash_config_t	lb_hash_config
	the hash config to use when selecting a bucket. More...
dpo_id_t *	lb_buckets
	Vector of buckets containing the next DPOs, sized as lbo_num. More...
dpo_id_t	lb_buckets_inline [LB_NUM_INLINE_BUCKETS]
	The rest of the cache line is used for buckets. More...

Detailed Description

The FIB DPO provieds;.

• load-balancing over the next DPOs in the chain/graph
• per-route counters

Definition at line 83 of file load_balance.h.

Field Documentation

dpo_id_t* load_balance_t_::lb_buckets

Vector of buckets containing the next DPOs, sized as lbo_num.

Definition at line 127 of file load_balance.h.

dpo_id_t load_balance_t_::lb_buckets_inline[LB_NUM_INLINE_BUCKETS]

The rest of the cache line is used for buckets.

In the common case where there there are less than 4 buckets, then the buckets are on the same cachlie and we save ourselves a pointer dereferance in the data-path.

Definition at line 135 of file load_balance.h.

flow_hash_config_t load_balance_t_::lb_hash_config

the hash config to use when selecting a bucket.

this is a u16

Definition at line 122 of file load_balance.h.

u32 load_balance_t_::lb_locks

The number of locks, which is approximately the number of users, of this load-balance.

Load-balance objects of via-entries are heavily shared by recursives, so the lock count is a u32.

Definition at line 107 of file load_balance.h.

index_t load_balance_t_::lb_map

index of the load-balance map, INVALID if this LB does not use one

Definition at line 112 of file load_balance.h.

u16 load_balance_t_::lb_n_buckets

number of buckets in the load-balance.

always a power of 2.

Definition at line 87 of file load_balance.h.

u16 load_balance_t_::lb_n_buckets_minus_1

number of buckets in the load-balance - 1.

used in the switch path as part of the hash calculation.

Definition at line 92 of file load_balance.h.

dpo_proto_t load_balance_t_::lb_proto

The protocol of packets that traverse this LB.

need in combination with the flow hash config to determine how to hash. u8.

Definition at line 99 of file load_balance.h.

index_t load_balance_t_::lb_urpf

This is the index of the uRPF list for this LB.

Definition at line 117 of file load_balance.h.

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The documentation for this struct was generated from the following file:

• vnet/vnet/dpo/load_balance.h