On Tue, 1 Mar 2022 18:34:22 +0000 "Lombardo, Ed" <ed.lomba...@netscout.com> wrote:
> Hi, > I have an application built with dpdk 17.11. > During initialization I want to change the mbuf size from 2K to 16K. > I want to receive packet sizes of 8K or more in one mbuf. > > The VM running the application is configured to have 2G hugepages. > > I tried many things and I get an error when a packet arrives. > > I read online that there is #define DEFAULT_MBUF_DATA_SIZE that I changed > from 2176 to ((2048*8)+128), where 128 is for headroom. > The call to rte_pktmbuf_pool_create() returns success with my changes. > From the rte_mempool_dump() - "rx_nombuf" - Total number of Rx mbuf > allocation failures. This value increments each time a packet arrives. > > Is there any reference document explaining what causes this error? > Is there a user guide I should follow to make the mbuf size change, starting > with the hugepage value? > > Thanks, > Ed Did you check that you have enough memory in the system for the larger footprint? Using 16K per mbuf is going to cause lots of memory to be consumed.
