Hi, Yes VPP default to 1024 descriptors per RX and per TX queue for DPDK interface. By default, the number of txq is determined by the number of threads (main thread + worker threads). So if you have 1 interface, 16 rxq and 16 workers, you will allocate 1024 * (16 + (1 + 16)) = 33792 buffers for the interface. You can tweak those parameters (number of descriptors per queue, total number of buffers etc), see [1] and [2].
Best Ben [1] https://fd.io/docs/vpp/master/gettingstarted/users/configuring/startup.html#the-dpdk-section [2] https://fd.io/docs/vpp/master/gettingstarted/users/configuring/startup.html#the-buffers-section > -----Original Message----- > From: vpp-dev@lists.fd.io <vpp-dev@lists.fd.io> On Behalf Of > chanwai1...@gmail.com > Sent: mercredi 30 septembre 2020 05:06 > To: vpp-dev@lists.fd.io > Subject: Re: [vpp-dev] vnet buffer leaking on 20.09RC2? > > #9 0x00007fff6da8fae4 in ice_alloc_rx_queue_mbufs (rxq=0x7fe2406de580) at > /home/ubuntu/vpp/build-root/build-vpp_debug-native/external/dpdk- > 20.08/drivers/net/ice/ice_rxtx.c:193 > #10 0x00007fff6da9fa4b in ice_rx_queue_start (dev=0x7fff7146dec0 > <rte_eth_devices>, rx_queue_id=5) at /home/ubuntu/vpp/build-root/build- > vpp_debug-native/external/dpdk-20.08/drivers/net/ice/ice_rxtx.c:391 > #11 0x00007fff6da6b5b2 in ice_dev_start (dev=0x7fff7146dec0 > <rte_eth_devices>) at /home/ubuntu/vpp/build-root/build-vpp_debug- > native/external/dpdk-20.08/drivers/net/ice/ice_ethdev.c:3324 > #12 0x00007fff6c6318c2 in rte_eth_dev_start (port_id=0) at > /home/ubuntu/vpp/build-root/build-vpp_debug-native/external/dpdk- > 20.08/lib/librte_ethdev/rte_ethdev.c:1636 > #13 0x00007fff707a82c2 in dpdk_device_start (xd=0x7fff78ebe700) at > /home/ubuntu/vpp/src/plugins/dpdk/device/common.c:173 > > It seems that the ice driver will reserve 1024 buffers per rx queue. > let me try do some more test to check if vlib_buffer_alloc will failed > when there is enough buffers.
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