Interesting, I made something similar years ago when io_uring wasn't around yet and it is just a couple threads blocking on sendfile: https://github.com/evelance/sockbiter
Of course it needs to pre-generate the file and you need enough RAM for both the server running and caching the file but it needs almost zero CPU during the test run and can probably produce even more load than this io_uring tool.
Of course it needs to pre-generate the file and you need enough RAM for both the server running and caching the file but it needs almost zero CPU during the test run and can probably produce even more load than this io_uring tool.