72f04da48a
It would seem none of the kernel continuous integration does this:
$ cd tools/io_uring
$ make
Otherwise it may have noticed:
cc -Wall -Wextra -g -D_GNU_SOURCE -c -o io_uring-bench.o
io_uring-bench.c
io_uring-bench.c:133:12: error: static declaration of ‘gettid’
follows non-static declaration
133 | static int gettid(void)
| ^~~~~~
In file included from /usr/include/unistd.h:1170,
from io_uring-bench.c:27:
/usr/include/x86_64-linux-gnu/bits/unistd_ext.h:34:16: note:
previous declaration of ‘gettid’ was here
34 | extern __pid_t gettid (void) __THROW;
| ^~~~~~
make: *** [<builtin>: io_uring-bench.o] Error 1
The problem on Ubuntu 20.04 (with lk 5.9.0-rc5) is that unistd.h
already defines gettid(). So prefix the local definition with
"lk_".
Signed-off-by: Douglas Gilbert <dgilbert@interlog.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
|
||
|---|---|---|
| .. | ||
| Makefile | ||
| README | ||
| barrier.h | ||
| io_uring-bench.c | ||
| io_uring-cp.c | ||
| liburing.h | ||
| queue.c | ||
| setup.c | ||
| syscall.c | ||
README
This directory includes a few programs that demonstrate how to use io_uring in an application. The examples are: io_uring-cp A very basic io_uring implementation of cp(1). It takes two arguments, copies the first argument to the second. This example is part of liburing, and hence uses the simplified liburing API for setting up an io_uring instance, submitting IO, completing IO, etc. The support functions in queue.c and setup.c are straight out of liburing. io_uring-bench Benchmark program that does random reads on a number of files. This app demonstrates the various features of io_uring, like fixed files, fixed buffers, and polled IO. There are options in the program to control which features to use. Arguments is the file (or files) that io_uring-bench should operate on. This uses the raw io_uring interface. liburing can be cloned with git here: git://git.kernel.dk/liburing and contains a number of unit tests as well for testing io_uring. It also comes with man pages for the three system calls. Fio includes an io_uring engine, you can clone fio here: git://git.kernel.dk/fio