On 12/21/21 15:35, Pavel Begunkov wrote:
> Update on io_uring zerocopy tx, still RFC. For v1 and design notes see
[...]
> 
> Benchmarks for dummy netdev, UDP/IPv4, payload size=4096:
>   -n<N> is how many requests we submit per syscall. From io_uring perspective -n1
>         is wasteful and far from optimal, but included for comparison.
>   -z0   disables zerocopy, just normal io_uring send requests
>   -f    makes to flush "buffer free" notifications for every request
[...]> https://github.com/isilence/linux/tree/zc_v2
> https://github.com/isilence/liburing/tree/zc_v2
> 
> The Benchmark is <liburing>/test/send-zc,
> 
> send-zc [-f] [-n<N>] [-z0] -s<payload size> -D<dst ip> (-6|-4) [-t<sec>] udp

Attaching a standalone send-zc for convenience.

gcc -luring -O2 -o send-zc ./send-zc.c

-- 
Pavel Begunkov