Main example may take abnormal time

[chuqingq]

~/temp/dpdk-rte_ring $ ./main start enqueue, 5 producer threads, echo thread enqueue 10000 numbers. start dequeue, 1 consumer thread, dequeue 50000 numbers time diff: 14011110 ns dequeue total: 50000, sum: 249975000 ~/temp/dpdk-rte_ring $ ./main start enqueue, 5 producer threads, echo thread enqueue 10000 numbers. start dequeue, 1 consumer thread, dequeue 50000 numbers time diff: 14052456 ns dequeue total: 50000, sum: 249975000 ~/temp/dpdk-rte_ring $ ./main start enqueue, 5 producer threads, echo thread enqueue 10000 numbers. start dequeue, 1 consumer thread, dequeue 50000 numbers time diff: 13765569 ns dequeue total: 50000, sum: 249975000 ~/temp/dpdk-rte_ring $ ./main start enqueue, 5 producer threads, echo thread enqueue 10000 numbers. start dequeue, 1 consumer thread, dequeue 50000 numbers time diff: 70299109713 ns dequeue total: 50000, sum: 249975000

~/temp/dpdk-rte_ring $ time ./main start enqueue, 5 producer threads, echo thread enqueue 10000 numbers. start dequeue, 1 consumer thread, dequeue 50000 numbers time diff: 13734627 ns dequeue total: 50000, sum: 249975000

real 0m0.013s user 0m0.023s sys 0m0.003s ~/temp/dpdk-rte_ring $ time ./main start enqueue, 5 producer threads, echo thread enqueue 10000 numbers. start dequeue, 1 consumer thread, dequeue 50000 numbers time diff: 14341767 ns dequeue total: 50000, sum: 249975000

real 0m0.013s user 0m0.023s sys 0m0.003s ~/temp/dpdk-rte_ring $ time ./main start enqueue, 5 producer threads, echo thread enqueue 10000 numbers. start dequeue, 1 consumer thread, dequeue 50000 numbers time diff: 13951518 ns dequeue total: 50000, sum: 249975000

real 0m0.013s user 0m0.023s sys 0m0.003s ~/temp/dpdk-rte_ring $ time ./main start enqueue, 5 producer threads, echo thread enqueue 10000 numbers. start dequeue, 1 consumer thread, dequeue 50000 numbers time diff: 13868262 ns dequeue total: 50000, sum: 249975000

real 0m0.013s user 0m0.023s sys 0m0.003s ~/temp/dpdk-rte_ring $ time ./main start enqueue, 5 producer threads, echo thread enqueue 10000 numbers. start dequeue, 1 consumer thread, dequeue 50000 numbers time diff: 13748691 ns dequeue total: 50000, sum: 249975000

real 0m0.013s user 0m0.022s sys 0m0.003s ~/temp/dpdk-rte_ring $ time ./main start enqueue, 5 producer threads, echo thread enqueue 10000 numbers. start dequeue, 1 consumer thread, dequeue 50000 numbers time diff: 13561638 ns dequeue total: 50000, sum: 249975000

real 0m0.013s user 0m0.023s sys 0m0.003s ~/temp/dpdk-rte_ring $ time ./main start enqueue, 5 producer threads, echo thread enqueue 10000 numbers. start dequeue, 1 consumer thread, dequeue 50000 numbers time diff: 13700562 ns dequeue total: 50000, sum: 249975000

real 0m0.013s user 0m0.023s sys 0m0.003s ~/temp/dpdk-rte_ring $ time ./main start enqueue, 5 producer threads, echo thread enqueue 10000 numbers. start dequeue, 1 consumer thread, dequeue 50000 numbers time diff: 13373007 ns dequeue total: 50000, sum: 249975000

real 0m0.028s user 0m0.062s sys 0m0.003s ~/temp/dpdk-rte_ring $ time ./main start enqueue, 5 producer threads, echo thread enqueue 10000 numbers. start dequeue, 1 consumer thread, dequeue 50000 numbers time diff: 13959600 ns dequeue total: 50000, sum: 249975000

real 0m0.013s user 0m0.023s sys 0m0.003s ~/temp/dpdk-rte_ring $ time ./main start enqueue, 5 producer threads, echo thread enqueue 10000 numbers. start dequeue, 1 consumer thread, dequeue 50000 numbers time diff: 15546474 ns dequeue total: 50000, sum: 249975000

real 0m0.013s user 0m0.020s sys 0m0.003s ~/temp/dpdk-rte_ring $ time ./main start enqueue, 5 producer threads, echo thread enqueue 10000 numbers. start dequeue, 1 consumer thread, dequeue 50000 numbers time diff: 209055734802 ns dequeue total: 50000, sum: 249975000

real 1m17.457s user 4m57.134s sys 0m0.621s