A new mutex, 'nonpmd_mp_mutex', has been introduced to serialise allocation and free operations by non-pmd threads on a given mempool.
free_dpdk_buf() has been modified to make use of the introduced mutex. Signed-off-by: Tiago Lam <[email protected]> --- lib/netdev-dpdk.c | 21 ++++++++++++++++++++- 1 file changed, 20 insertions(+), 1 deletion(-) diff --git a/lib/netdev-dpdk.c b/lib/netdev-dpdk.c index f546507..efd7c20 100644 --- a/lib/netdev-dpdk.c +++ b/lib/netdev-dpdk.c @@ -294,6 +294,10 @@ static struct ovs_mutex dpdk_mp_mutex OVS_ACQ_AFTER(dpdk_mutex) static struct ovs_list dpdk_mp_free_list OVS_GUARDED_BY(dpdk_mp_mutex) = OVS_LIST_INITIALIZER(&dpdk_mp_free_list); +/* This mutex must be used by non pmd threads when allocating or freeing + * mbufs through mempools. */ +static struct ovs_mutex nonpmd_mp_mutex = OVS_MUTEX_INITIALIZER; + /* Wrapper for a mempool released but not yet freed. */ struct dpdk_mp { struct rte_mempool *mp; @@ -461,6 +465,8 @@ struct netdev_rxq_dpdk { dpdk_port_t port_id; }; +static bool dpdk_thread_is_pmd(void); + static void netdev_dpdk_destruct(struct netdev *netdev); static void netdev_dpdk_vhost_destruct(struct netdev *netdev); @@ -494,6 +500,12 @@ dpdk_buf_size(int mtu) NETDEV_DPDK_MBUF_ALIGN); } +static bool +dpdk_thread_is_pmd(void) +{ + return rte_lcore_id() != NON_PMD_CORE_ID; +} + /* Allocates an area of 'sz' bytes from DPDK. The memory is zero'ed. * * Unlike xmalloc(), this function can return NULL on failure. */ @@ -506,9 +518,16 @@ dpdk_rte_mzalloc(size_t sz) void free_dpdk_buf(struct dp_packet *p) { - struct rte_mbuf *pkt = (struct rte_mbuf *) p; + if (!dpdk_thread_is_pmd()) { + ovs_mutex_lock(&nonpmd_mp_mutex); + } + struct rte_mbuf *pkt = (struct rte_mbuf *) p; rte_pktmbuf_free(pkt); + + if (!dpdk_thread_is_pmd()) { + ovs_mutex_unlock(&nonpmd_mp_mutex); + } } static void -- 2.7.4 _______________________________________________ dev mailing list [email protected] https://mail.openvswitch.org/mailman/listinfo/ovs-dev
