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authorJens Axboe <axboe@kernel.dk>2019-03-06 19:03:50 +0300
committerJens Axboe <axboe@kernel.dk>2019-03-06 23:00:16 +0300
commit21b4aa5d20fd07207e73270cadffed5c63fb4343 (patch)
treef9efcd15b170905dd1d9a4f1801b26b0ec90c34e /tools/io_uring/barrier.h
parent31b515106428b9717d2b6475b6f6182cf231b1e6 (diff)
downloadlinux-21b4aa5d20fd07207e73270cadffed5c63fb4343.tar.xz
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>
Diffstat (limited to 'tools/io_uring/barrier.h')
-rw-r--r--tools/io_uring/barrier.h16
1 files changed, 16 insertions, 0 deletions
diff --git a/tools/io_uring/barrier.h b/tools/io_uring/barrier.h
new file mode 100644
index 000000000000..ef00f6722ba9
--- /dev/null
+++ b/tools/io_uring/barrier.h
@@ -0,0 +1,16 @@
+#ifndef LIBURING_BARRIER_H
+#define LIBURING_BARRIER_H
+
+#if defined(__x86_64) || defined(__i386__)
+#define read_barrier() __asm__ __volatile__("":::"memory")
+#define write_barrier() __asm__ __volatile__("":::"memory")
+#else
+/*
+ * Add arch appropriate definitions. Be safe and use full barriers for
+ * archs we don't have support for.
+ */
+#define read_barrier() __sync_synchronize()
+#define write_barrier() __sync_synchronize()
+#endif
+
+#endif