Hello, I'm in the process of configuring new 40G hardware with nProbe Cento to replace older hardware with 2 x 10G and nProbe. It is going well however I'm not yet getting zero packet loss which is what I was expecting. Packet loss is low but not zero, about 0.1% with traffic rate 13.5 Gbps, 1.7 Mpps.
Are there tuning recommendations that I can try to achieve zero packet loss? Here are some details of my environment: OS: CentOS Linux release 7.4.1708 Kernel: Linux cento 3.10.0-693.11.1.el7.x86_64 #1 SMP Mon Dec 4 23:52:40 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux REPO: ntop CentOS Stable CPU: Intel(R) Xeon(R) E3-1275 v6 (4 cores + HT = 8 Logical CPUs) MEM: 8 GB NIC: Intel XL710-QDA1 NIC Driver: i40e_zc v2.2.4 RSS: Auto configured to 8 PFRING: 7.0.0 ($Revision: 7.0.0-stable:f18cdc778a3c957689125dd7c52c40c2277703fa$) Huge pages: 2048 Cento version: nProbe cento v.1.2.171211 1.2-stable:de3cd10fb80990c50e753af6026787fe62b6d2b3:20171211 Cento Invocation: cento --interface zc:enp1s0@[0-7] --lifetime-timeout 300 --v5 <IP>:<PORT> CPU Utilization is generally under 2% for all cores except 7 which is around 10%. Memory Utilization is 5.0 GB / 7.43 GB, no swap usage. - Mike
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