Hi Kam, On 11/28/2014 06:34 PM, Kamraan Nasim wrote: > I have ~15Gbps of traffic flowing through two 10GE ports and been profiling > the rte mempool(or rather the pktmbuf mempool) memory consumption: > > I have per lcore caching disabled(cache_size is 0) > > I have noticed that: > - Mempool FREE cnt(as given byt rte_mempool_free_count()) increases > - Mempool USED cnt(as given by rte_mempool_used_count() decreases and > eventually drops to 0. When this happens, mempool reports itself as EMPTY > - rx_nombuf stats for the eth ports start climbing > - Valgrind Memcheck does not indicate any obvious leaks in RTE mempool or > my application. > > > I was wondering if others have come across this issue? Or if people here > have used ways, besides Valgrind to profile the mempool or the pkt mbuf > pool?
First, be careful with rte_mempool_free_count(): it returns the number of free entries in the internal ring of the mempool, which actually corresponds to the number of allocated objects from the mempool point of view. See: http://dpdk.org/browse/dpdk/tree/lib/librte_mempool/rte_mempool.h If you have the number of allocated objects increasing, and the statistics rx_nombuf increasing when the mbuf pool is empty, it means that you have a mbuf leak in your application. Valgrind won't see it since it does not know about mempool alloc/free functions. Regards, Olivier