• tchaloupka (41/41) Dec 08 2019 As of Linux kernel 5.1 new promissing io_uring interface was
• Tobias Pankrath (2/9) Dec 08 2019 I like the range interface.
• Daniel Kozak (2/6) Dec 09 2019 https://bitbucket.org/kozzi11/during_io/src/master/

tchaloupka <chalucha gmail.com> writes:

As of Linux kernel 5.1 new promissing io_uring interface was 
introduced (see introduction document 
https://kernel.dk/io_uring.pdf).

During[1] is a low level wrapper directly around Linux `io_uring` 
interface and so isn't using more C-ish liburing[2].

Whole library is built as `nothrow  nogc` and works with 
`-betterC` too.

Currently only features up to Linux 5.3 are tested. More would 
follow.

For some basic idea how this can be performant, I've added a 
sample echo_server[3] to the library with these results:

```
C++ epoll echo server:
======================
Benchmarking: localhost:5000
50 clients, running 512 bytes, 10 sec.

Speed: 45063 request/sec, 45063 response/sec
Requests: 450631
Responses: 450631

C liburing echo server:
=======================
Benchmarking: localhost:12345
50 clients, running 512 bytes, 10 sec.

Speed: 95894 request/sec, 95894 response/sec
Requests: 958942
Responses: 958941

During echo server:
===================
Benchmarking: localhost:12345
50 clients, running 512 bytes, 10 sec.

Speed: 131090 request/sec, 131090 response/sec
Requests: 1310906
Responses: 1310904
```

Main difference with C liburing echo server is that we're using 
preregistered IO buffer so the kernel has less work with it. 
Otherwise it should perform similarly.

[1] https://github.com/tchaloupka/during
[2] https://github.com/axboe/liburing
[3] 
https://github.com/tchaloupka/during/tree/master/examples/echo_server

Tobias Pankrath <tobias pankrath.net> writes:

On Sunday, 8 December 2019 at 10:35:24 UTC, tchaloupka wrote:
 Main difference with C liburing echo server is that we're using 
 preregistered IO buffer so the kernel has less work with it. 
 Otherwise it should perform similarly.

 [1] https://github.com/tchaloupka/during
 [2] https://github.com/axboe/liburing
 [3] 
 https://github.com/tchaloupka/during/tree/master/examples/echo_server

I like the range interface.

Daniel Kozak <kozzi11 gmail.com> writes:

On Sunday, 8 December 2019 at 10:35:24 UTC, tchaloupka wrote:
 As of Linux kernel 5.1 new promissing io_uring interface was 
 introduced (see introduction document 
 https://kernel.dk/io_uring.pdf).

 During[1] is a low level wrapper directly around Linux

https://bitbucket.org/kozzi11/during_io/src/master/