On Mon, May 23, 2016 at 03:09:18PM +0200, Jesper Dangaard Brouer wrote: > On Mon, 23 May 2016 13:43:46 +0300 > "Michael S. Tsirkin" <m...@redhat.com> wrote: > > > Add ringtest based unit test for skb array. > > > > Signed-off-by: Michael S. Tsirkin <m...@redhat.com> > > --- > > tools/virtio/ringtest/skb_array.c | 167 > > ++++++++++++++++++++++++++++++++++++++ > > tools/virtio/ringtest/Makefile | 4 +- > > Patch didn't apply cleanly to Makefile, as you also seems to have > "virtio_ring_inorder", I manually applied it. > > I chdir to tools/virtio/ringtest/ and I could compile "skb_array", > BUT how do I use it??? (the README is not helpful) > > What is the "output", are there any performance measurement results?
First, if it completes successfully this means it completed a ton of cycles without errors. It caches any missing barriers which aren't nops on your system. Second - use perf. E.g. simple perf stat will measure how long does it take to execute. there's a script that runs it on different CPUs, so I normally do: sh run-on-all.sh perf stat -r 5 ./skb_array > > diff --git a/tools/virtio/ringtest/Makefile b/tools/virtio/ringtest/Makefile > > index 6ba7455..87e58cf 100644 > > --- a/tools/virtio/ringtest/Makefile > > +++ b/tools/virtio/ringtest/Makefile > > @@ -1,6 +1,6 @@ > > all: > > > > -all: ring virtio_ring_0_9 virtio_ring_poll virtio_ring_inorder > > +all: ring virtio_ring_0_9 virtio_ring_poll virtio_ring_inorder skb_array > ^^^^^^^^^^^^^^^^^^^ > > > > CFLAGS += -Wall > > CFLAGS += -pthread -O2 -ggdb > > @@ -8,6 +8,7 @@ LDFLAGS += -pthread -O2 -ggdb > > > > main.o: main.c main.h > > ring.o: ring.c main.h > > +skb_array.o: skb_array.c main.h ../../../include/linux/skb_array.h > > virtio_ring_0_9.o: virtio_ring_0_9.c main.h > > virtio_ring_poll.o: virtio_ring_poll.c virtio_ring_0_9.c main.h > > virtio_ring_inorder.o: virtio_ring_inorder.c virtio_ring_0_9.c main.h > > @@ -15,6 +16,7 @@ ring: ring.o main.o > > virtio_ring_0_9: virtio_ring_0_9.o main.o > > virtio_ring_poll: virtio_ring_poll.o main.o > > virtio_ring_inorder: virtio_ring_inorder.o main.o > ^^^^^^^^^^^^^^^^^^^ ^^^^^^^^^^^^^^^^^^^^^ > > +skb_array: skb_array.o main.o > > clean: > > -rm main.o > > -rm ring.o ring > > > -- > Best regards, > Jesper Dangaard Brouer > MSc.CS, Principal Kernel Engineer at Red Hat > Author of http://www.iptv-analyzer.org > LinkedIn: http://www.linkedin.com/in/brouer
