Hi, As per this [1], after tcp_max_tw_buckets threshold is hit timewait time is 0 and this [2] explains what will go wrong. Assuming you’re hitting the threshold, 1s timewait-time in vpp will probably not be enough to match performance.
Not sure what you mean by “short link”. If you can’t use multiple source IPs or destination IPs in the active opens between vpp and the upstream servers, there’s not much that could be done beyond what’s mentioned above as vpp can’t allocate connections. If your nginx and server it’s proxying for are colocated, and the server can use vcl, you could maybe try to use cut-through sessions as those do not consume ports in tcp. Regards, Florin [1] https://sysctl-explorer.net/net/ipv4/tcp_max_tw_buckets/ <https://sysctl-explorer.net/net/ipv4/tcp_max_tw_buckets/> [2] https://stackoverflow.com/questions/45979123/what-is-the-side-effect-of-setting-tcp-max-tw-buckets-to-a-very-small-value <https://stackoverflow.com/questions/45979123/what-is-the-side-effect-of-setting-tcp-max-tw-buckets-to-a-very-small-value> > On May 1, 2022, at 2:09 AM, weizhen9...@163.com wrote: > > Hi, > I set the timewait_time which is equal to 1s in tcp's configuration. But > the performance of nginx proxy using vpp host stack is still lower than nginx > proxy using kernel host stack. > Now I want to know what can I do to improve the performance? And does > nginx proxy using vpp host stack support short link? > In addition, just as you said above, do I need to sets time-wait to 0? > And I don't set tcp-src address. I hope the performance of nginx proxy using > vpp host stack is higher than the performance of nginx proxy using kernel > host stack in the hardware environment. > Thanks. > > > >
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