[root@localhost mbuf]# cat main.c #include <stdio.h> #include <string.h> #include <stdint.h> #include <errno.h> #include <sys/queue.h> #include <rte_launch.h> #include <rte_eal.h> #include <rte_per_lcore.h> #include <rte_lcore.h> #include <rte_debug.h> #include <rte_mempool.h> #include <rte_mbuf.h> #include <rte_ether.h> #define RAW_MEMPOOL #define MBUF_COUNT (1024-1) #define PRIV_SIZE 16 // ETH_MAX_len = 1518 // ETH_MTU = ETH_MAX_LEN - ETH_HDR_LEN - ETHER_CRC_LEN = 1518 - 14 - 4 = 1500 #define MBUF_DATAROOM_SIZE (RTE_PKTMBUF_HEADROOM + RTE_ETHER_MAX_LEN) #define MBUF_SIZE (sizeof(struct rte_mbuf) + PRIV_SIZE + MBUF_DATAROOM_SIZE) #define CACHE_SIZE 32 static void mbuf_dump(struct rte_mbuf* m) { printf("RTE_PKTMBUF_HEADROOM: %u ", RTE_PKTMBUF_HEADROOM); printf("sizeof(mbuf): %lu ", sizeof(struct rte_mbuf)); printf("m: %p ", m); printf("m->refcnt: %u ", m->refcnt); printf("m->buf_addr: %p ", m->buf_addr); printf("m->data_off: %u ", m->data_off); printf("m->buf_len: %u ", m->buf_len); printf("m->pkt_len: %u ", m->pkt_len); printf("m->data_len: %u ", m->data_len); printf("m->nb_segs: %u ", m->nb_segs); printf("m->next: %p ", m->next); printf("m->buf_addr+m->data_off: %p ", (char*)m->buf_addr+m->data_off); printf("rte_pktmbuf_mtod(m): %p ", rte_pktmbuf_mtod(m, char*)); printf("rte_pktmbuf_data_len(m): %u ", rte_pktmbuf_data_len(m)); printf("rte_pktmbuf_pkt_len(m): %u ", rte_pktmbuf_pkt_len(m)); printf("rte_pktmbuf_headroom(m): %u ", rte_pktmbuf_headroom(m)); printf("rte_pktmbuf_tailroom(m): %u ", rte_pktmbuf_tailroom(m)); printf("rte_pktmbuf_data_room_size(mpool): %u ", rte_pktmbuf_data_room_size(m->pool)); printf("rte_pktmbuf_priv_size(mpool): %u ", rte_pktmbuf_priv_size(m->pool)); } static int mbuf_demo(void) { struct rte_mempool* mpool; struct rte_mbuf *m; struct rte_mempool_objsz objsz; uint32_t mbuf_size; #ifdef RAW_MEMPOOL struct rte_pktmbuf_pool_private priv; priv.mbuf_data_room_size = MBUF_DATAROOM_SIZE; priv.mbuf_priv_size = PRIV_SIZE; mpool = rte_mempool_create("test_pool", MBUF_COUNT, MBUF_SIZE, CACHE_SIZE, sizeof(struct rte_pktmbuf_pool_private), rte_pktmbuf_pool_init, &priv, rte_pktmbuf_init, NULL, SOCKET_ID_ANY, MEMPOOL_F_SC_GET); #else mpool = rte_pktmbuf_pool_create("test_pool", MBUF_COUNT, CACHE_SIZE, PRIV_SIZE, MBUF_DATAROOM_SIZE, SOCKET_ID_ANY); #endif if(NULL == mpool) return -1; mbuf_size = rte_mempool_calc_obj_size(MBUF_SIZE, 0, &objsz); printf("mbuf_size: %u ", mbuf_size); printf("elt_size: %u, header_size: %u, trailer_size: %u, total_size: %u ", objsz.elt_size, objsz.header_size, objsz.trailer_size, objsz.total_size); m = rte_pktmbuf_alloc(mpool); mbuf_dump(m); rte_pktmbuf_append(m, 1000); mbuf_dump(m); printf("mempool count before free: %u ", rte_mempool_avail_count(mpool)); printf("before free m->refcnt: %u ", m->refcnt); rte_pktmbuf_free(m); printf("after free m->refcnt: %u ", m->refcnt); printf("mempool count after free: %u ", rte_mempool_avail_count(mpool)); return 0; } int main(int argc, char **argv) { int ret; //unsigned lcore_id; ret = rte_eal_init(argc, argv); if (ret < 0) rte_panic("Cannot init EAL "); /* call on every slave lcore */ //RTE_LCORE_FOREACH_SLAVE(lcore_id) { // rte_eal_remote_launch(lcore_hello, NULL, lcore_id);: //} mbuf_demo(); rte_eal_mp_wait_lcore(); return 0; }
[root@localhost mbuf]# build/app/helloworld -c 0xf -n 4 EAL: Detected 128 lcore(s) EAL: Detected 4 NUMA nodes EAL: Multi-process socket /var/run/dpdk/rte/mp_socket EAL: Selected IOVA mode 'PA' EAL: No available hugepages reported in hugepages-2048kB EAL: Probing VFIO support... EAL: VFIO support initialized EAL: PCI device 0000:05:00.0 on NUMA socket 0 EAL: probe driver: 19e5:200 net_hinic EAL: using IOMMU type 1 (Type 1) net_hinic: Initializing pf hinic-0000:05:00.0 in primary process net_hinic: Device 0000:05:00.0 hwif attribute: net_hinic: func_idx:0, p2p_idx:0, pciintf_idx:0, vf_in_pf:0, ppf_idx:0, global_vf_id:15, func_type:2 net_hinic: num_aeqs:4, num_ceqs:4, num_irqs:32, dma_attr:2 net_hinic: Get public resource capability: net_hinic: host_id: 0x0, ep_id: 0x0, intr_type: 0x0, max_cos_id: 0x7, er_id: 0x0, port_id: 0x0 net_hinic: host_total_function: 0xf2, host_oq_id_mask_val: 0x8, max_vf: 0x78 net_hinic: pf_num: 0x2, pf_id_start: 0x0, vf_num: 0xf0, vf_id_start: 0x10 net_hinic: Get share resource capability: net_hinic: host_pctxs: 0x0, host_cctxs: 0x0, host_scqs: 0x0, host_srqs: 0x0, host_mpts: 0x0 net_hinic: Get l2nic resource capability: net_hinic: max_sqs: 0x10, max_rqs: 0x10, vf_max_sqs: 0x4, vf_max_rqs: 0x4 net_hinic: Initialize 0000:05:00.0 in primary successfully EAL: PCI device 0000:06:00.0 on NUMA socket 0 EAL: probe driver: 19e5:200 net_hinic EAL: PCI device 0000:7d:00.0 on NUMA socket 0 EAL: probe driver: 19e5:a222 net_hns3 EAL: PCI device 0000:7d:00.1 on NUMA socket 0 EAL: probe driver: 19e5:a221 net_hns3 EAL: PCI device 0000:7d:00.2 on NUMA socket 0 EAL: probe driver: 19e5:a222 net_hns3 EAL: PCI device 0000:7d:00.3 on NUMA socket 0 EAL: probe driver: 19e5:a221 net_hns3 mbuf_size: 1920 elt_size: 1792, header_size: 128, trailer_size: 0, total_size: 1920 RTE_PKTMBUF_HEADROOM: 128 sizeof(mbuf): 128 m: 0x13f919c00 m->refcnt: 1 m->buf_addr: 0x13f919c90 m->data_off: 128 m->buf_len: 1646 --------------不等于0 m->pkt_len: 0 ---------------等于0 m->data_len: 0 m->nb_segs: 1 m->next: (nil) m->buf_addr+m->data_off: 0x13f919d10 rte_pktmbuf_mtod(m): 0x13f919d10 rte_pktmbuf_data_len(m): 0 rte_pktmbuf_pkt_len(m): 0 rte_pktmbuf_headroom(m): 128 rte_pktmbuf_tailroom(m): 1518 rte_pktmbuf_data_room_size(mpool): 1646 rte_pktmbuf_priv_size(mpool): 16 RTE_PKTMBUF_HEADROOM: 128 sizeof(mbuf): 128 m: 0x13f919c00 m->refcnt: 1 m->buf_addr: 0x13f919c90 m->data_off: 128 m->buf_len: 1646 m->pkt_len: 1000 m->data_len: 1000 m->nb_segs: 1 m->next: (nil) m->buf_addr+m->data_off: 0x13f919d10 rte_pktmbuf_mtod(m): 0x13f919d10 rte_pktmbuf_data_len(m): 1000 ------------------ rte_pktmbuf_pkt_len(m): 1000 -------------------- rte_pktmbuf_headroom(m): 128 rte_pktmbuf_tailroom(m): 518 rte_pktmbuf_data_room_size(mpool): 1646 rte_pktmbuf_priv_size(mpool): 16 mempool count before free: 1022 before free m->refcnt: 1 after free m->refcnt: 1 ------------free了，还可以访问 mempool count after free: 1023