tools/virtio/ringtest: add usage example to README

Having typical usage example in the README file is more convinient than in
the git history...

Signed-off-by: Mike Rapoport <rppt@linux.vnet.ibm.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

diff --git a/tools/virtio/ringtest/README b/tools/virtio/ringtest/README
index 34e94c46104f0433bf709c2889890bc7cb2c0050..d83707a336c9272720b2f42b2b2cee804df07de8 100644 (file)
--- a/tools/virtio/ringtest/README
+++ b/tools/virtio/ringtest/README
@@ -1,2 +1,6 @@
 Partial implementation of various ring layouts, useful to tune virtio design.
 Uses shared memory heavily.
+
+Typical use:
+
+# sh run-on-all.sh perf stat -r 10 --log-fd 1 -- ./ring