On Fri, 22 Nov 2024 02:38:55 +0000 (UTC) amit sehas <cu...@yahoo.com> wrote:
> I am frequently running into out of mbufs when allocating packets. When this > happens is there a way to dump counts of which buffers are where so we know > what is going on? > > I know that each rte_mbuf pool also has per cpu core cache to speed up > alloc/free, and some of the buffers will end up there and if one were to > never utilize a particular core for a particular mpool perhaps those mbufs > are lost ... that is my rough guess ... > > How do you debug out of mbufs issue? > > regards The function rte_mempool_dump() will tell you some information about the status of a particular mempool. If you enable mempool statistics you can get more info. The best way to size a memory pool is to account for all the possible places mbuf's can be waiting. Something like: Num Port * Num RxQ * Num RxD + Num Port * Num TxQ * Num TxD + Num Lcores * Burst Size + Num Lcores * Cache size Often running out of mbufs is because of failure to free an recveived mbuf, or a buggy driver.
