linux-stable/tools/io_uring/README
Jens Axboe 21b4aa5d20 io_uring: add a few test tools
This adds two test programs in tools/io_uring/ that demonstrate both
the raw io_uring API (and all features) through a small benchmark
app, io_uring-bench, and the liburing exposed API in a simplified
cp(1) implementation through io_uring-cp.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
2019-03-06 13:00:16 -07:00

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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