【VPP】多线程内存定位的命令总结

最新推荐文章于 2025-06-30 09:19:53 发布

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最新推荐文章于 2025-06-30 09:19:53 发布 · 2.6k 阅读

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#vpp

本文总结了VPP环境下多线程内存定位的几个关键命令：使用#show dpdk buffer监控DPDK mbuf内存状态，预防内存泄露；通过#show memory了解VPP各线程内存占用详情；利用#show runtime分析节点收发包状况，定位多线程处理；借助#show hardware-interface查看接口队列和RSS设置；以及使用#show interface rx-placement查看线程与接口的分配情况，辅助问题排查。

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#show dpdk buffer
(查看dpdk的mbuf 的使用情况。长期观察可以看到dpdk的mbuf是否在泄露)

yazhou# show dpdk buffer 
name="dpdk_mbuf_pool_socket0"  available =    7597 allocated =    8785 total =   16382

#show memory
(查看vpp的内存占用情况。包括每个线程的使用情况)

yazhou# show memory 
Thread 0 vpp_main
  virtual memory start 0x7fb788e6b000, size 1048640k, 262160 pages, page size 4k
    numa 0: 6142 pages, 24568k
    not mapped: 256018 pages, 1024072k
  total: 1.00G, used: 25.53M, free: 998.53M, trimmable: 994.48M
no traced allocations


Thread 1 vpp_wk_0
  virtual memory start 0x7fb788e6b000, size 1048640k, 262160 pages, page size 4k
    numa 0: 6142 pages, 24568k
    not mapped: 256018 pages, 1024072k
  total: 1.00G, used: 25.53M, free: 998.53M, trimmable: 994.48M
no traced allocations


Thread 2 vpp_wk_1
  virtual memory start 0x7fb788e6b000, size 1048640k, 262160 pages, page size 4k
    numa 0: 6142 pages, 24568k
    not mapped: 256018 pages, 1024072k
  total: 1.00G, used: 25.53M, free: 998.53M, trimmable: 994.48M
no traced allocations

#show runtime
(看到每个node节点的收发包情况，也可以定位多线程的收发包个数，放一个报文流，就可以看到报文到底走到哪个线程去了)

yazhou# show runtime
---------------
Thread 1 vpp_wk_0 (lcore 0)
Time 55750.9, average vectors/node 1.00, last 128 main loops 0.00 per node 0.00
  vector rates in 7.5387e4, out 7.5387e4, drop 7.5387e4, punt 0.0000e0
             Name                 State         Calls          Vector