[dpdk-users] what's the cache size of rte_mempool_create()?

[Thomas Monjalon]

+Cc mempool maintainers

08/09/2021 11:18, topperxin:
> HI list
>          A question about the value of cache size of rte_mempool_crate() function, the defination of this function like below:
> 
> 
>         struct rte_mempool *
> 
> rte_mempool_create(const char *name, unsigned n, unsigned elt_size,
> 
>                    unsigned cache_size, unsigned private_data_size,
> 
>                    rte_mempool_ctor_t *mp_init, void *mp_init_arg,
> 
>                    rte_mempool_obj_cb_t *obj_init, void *obj_init_arg,
> 
>                    int socket_id, unsigned flags);
> 
> 
> 
> 
> 
>      My question is : what's cache_size value means ? what's difference between if I set cache_size = 0 and cache_size = 512 ?
>      I get some information from the the dpdk 20.11 it said that, if we set cache size to 0 , it can be useful to avoid losing objects in cache , I can't understand this point, does it mean
>      that if we set the cache size to non zero, it will suffer the risk that some packages will lost ? right ?
> 
> 
>      Thanks for your tips.
> 
> 
>      BR.