similar to: [PATCH] tools/virtio: add ringtest utilities

skips ring accesses but drops out of order support At high level this follows alf design https://github.com/netoptimizer/prototype-kernel/blob/master/kernel/lib/alf_queue.c but on most (single-threaded) benchmarks this seems to be slower than the layout without index use. Signed-off-by: Michael S. Tsirkin <mst at redhat.com> --- tools/virtio/ringtest/virtio_ring_0_9.c | 49

skips ring accesses but drops out of order support At high level this follows alf design https://github.com/netoptimizer/prototype-kernel/blob/master/kernel/lib/alf_queue.c but on most (single-threaded) benchmarks this seems to be slower than the layout without index use. Signed-off-by: Michael S. Tsirkin <mst at redhat.com> --- tools/virtio/ringtest/virtio_ring_0_9.c | 49

last kicked event index must be updated unconditionally: even if we don't need to kick, we do not want to re-check the same entry for events. Reported-by: Cornelia Huck <cohuck at redhat.com> Signed-off-by: Michael S. Tsirkin <mst at redhat.com> --- tools/virtio/ringtest/virtio_ring_0_9.c | 24 ++++++++++++++---------- 1 file changed, 14 insertions(+), 10 deletions(-) diff --git

last kicked event index must be updated unconditionally: even if we don't need to kick, we do not want to re-check the same entry for events. Reported-by: Cornelia Huck <cohuck at redhat.com> Signed-off-by: Michael S. Tsirkin <mst at redhat.com> --- tools/virtio/ringtest/virtio_ring_0_9.c | 24 ++++++++++++++---------- 1 file changed, 14 insertions(+), 10 deletions(-) diff --git

Add ringtest based unit test for ptr ring. Signed-off-by: Michael S. Tsirkin <mst at redhat.com> --- tools/virtio/ringtest/ptr_ring.c | 192 +++++++++++++++++++++++++++++++++++++++ tools/virtio/ringtest/Makefile | 5 +- 2 files changed, 196 insertions(+), 1 deletion(-) create mode 100644 tools/virtio/ringtest/ptr_ring.c diff --git a/tools/virtio/ringtest/ptr_ring.c

Add ringtest based unit test for ptr ring. Signed-off-by: Michael S. Tsirkin <mst at redhat.com> --- tools/virtio/ringtest/ptr_ring.c | 192 +++++++++++++++++++++++++++++++++++++++ tools/virtio/ringtest/Makefile | 5 +- 2 files changed, 196 insertions(+), 1 deletion(-) create mode 100644 tools/virtio/ringtest/ptr_ring.c diff --git a/tools/virtio/ringtest/ptr_ring.c

last kicked event index must be updated unconditionally: even if we don't need to kick, we do not want to re-check the same entry for events. Signed-off-by: Michael S. Tsirkin <mst at redhat.com> --- tools/virtio/ringtest/ring.c | 24 +++++++++++++++--------- 1 file changed, 15 insertions(+), 9 deletions(-) diff --git a/tools/virtio/ringtest/ring.c b/tools/virtio/ringtest/ring.c index

last kicked event index must be updated unconditionally: even if we don't need to kick, we do not want to re-check the same entry for events. Signed-off-by: Michael S. Tsirkin <mst at redhat.com> --- tools/virtio/ringtest/ring.c | 24 +++++++++++++++--------- 1 file changed, 15 insertions(+), 9 deletions(-) diff --git a/tools/virtio/ringtest/ring.c b/tools/virtio/ringtest/ring.c index

Useful to measure testing framework overhead. Cc: Jesper Dangaard Brouer <brouer at redhat.com> Signed-off-by: Michael S. Tsirkin <mst at redhat.com> --- tools/virtio/ringtest/noring.c | 69 ++++++++++++++++++++++++++++++++++++++++++ tools/virtio/ringtest/Makefile | 4 ++- 2 files changed, 72 insertions(+), 1 deletion(-) create mode 100644 tools/virtio/ringtest/noring.c diff --git

Useful to measure testing framework overhead. Cc: Jesper Dangaard Brouer <brouer at redhat.com> Signed-off-by: Michael S. Tsirkin <mst at redhat.com> --- tools/virtio/ringtest/noring.c | 69 ++++++++++++++++++++++++++++++++++++++++++ tools/virtio/ringtest/Makefile | 4 ++- 2 files changed, 72 insertions(+), 1 deletion(-) create mode 100644 tools/virtio/ringtest/noring.c diff --git

The following changes since commit 92e963f50fc74041b5e9e744c330dca48e04f08d: Linux 4.5-rc1 (2016-01-24 13:06:47 -0800) are available in the git repository at: git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost.git tags/for_linus for you to fetch changes up to 481eaec37e91e2b33f17275901172f50ce2c71e8: tools/virtio: add ringtest utilities (2016-01-26 10:18:30 +0200)

The following changes since commit 92e963f50fc74041b5e9e744c330dca48e04f08d: Linux 4.5-rc1 (2016-01-24 13:06:47 -0800) are available in the git repository at: git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost.git tags/for_linus for you to fetch changes up to 481eaec37e91e2b33f17275901172f50ce2c71e8: tools/virtio: add ringtest utilities (2016-01-26 10:18:30 +0200)

last kicked event index must be updated unconditionally: even if we don't need to kick, we do not want to re-check the same entry for events. Signed-off-by: Michael S. Tsirkin <mst at redhat.com> --- Changes from v1: fix inverted logic in call_used tools/virtio/ringtest/ring.c | 24 +++++++++++++++--------- 1 file changed, 15 insertions(+), 9 deletions(-) diff --git

last kicked event index must be updated unconditionally: even if we don't need to kick, we do not want to re-check the same entry for events. Signed-off-by: Michael S. Tsirkin <mst at redhat.com> --- Changes from v1: fix inverted logic in call_used tools/virtio/ringtest/ring.c | 24 +++++++++++++++--------- 1 file changed, 15 insertions(+), 9 deletions(-) diff --git

These are used for legacy ring format, switch to APIs that make this explicit. Signed-off-by: Michael S. Tsirkin <mst at redhat.com> --- tools/virtio/ringtest/virtio_ring_0_9.c | 6 +++--- tools/virtio/virtio_test.c | 6 +++--- tools/virtio/vringh_test.c | 18 +++++++++--------- 3 files changed, 15 insertions(+), 15 deletions(-) diff --git

These are used for legacy ring format, switch to APIs that make this explicit. Signed-off-by: Michael S. Tsirkin <mst at redhat.com> --- tools/virtio/ringtest/virtio_ring_0_9.c | 6 +++--- tools/virtio/virtio_test.c | 6 +++--- tools/virtio/vringh_test.c | 18 +++++++++--------- 3 files changed, 15 insertions(+), 15 deletions(-) diff --git

These are used for legacy ring format, switch to APIs that make this explicit. Signed-off-by: Michael S. Tsirkin <mst at redhat.com> --- tools/virtio/ringtest/virtio_ring_0_9.c | 6 +++--- tools/virtio/virtio_test.c | 6 +++--- tools/virtio/vringh_test.c | 18 +++++++++--------- 3 files changed, 15 insertions(+), 15 deletions(-) diff --git

These are used for legacy ring format, switch to APIs that make this explicit. Signed-off-by: Michael S. Tsirkin <mst at redhat.com> --- tools/virtio/ringtest/virtio_ring_0_9.c | 6 +++--- tools/virtio/virtio_test.c | 6 +++--- tools/virtio/vringh_test.c | 18 +++++++++--------- 3 files changed, 15 insertions(+), 15 deletions(-) diff --git

These are used for legacy ring format, switch to APIs that make this explicit. Signed-off-by: Michael S. Tsirkin <mst at redhat.com> --- tools/virtio/ringtest/virtio_ring_0_9.c | 6 +++--- tools/virtio/virtio_test.c | 6 +++--- tools/virtio/vringh_test.c | 18 +++++++++--------- 3 files changed, 15 insertions(+), 15 deletions(-) diff --git

These are used for legacy ring format, switch to APIs that make this explicit. Signed-off-by: Michael S. Tsirkin <mst at redhat.com> --- tools/virtio/ringtest/virtio_ring_0_9.c | 6 +++--- tools/virtio/virtio_test.c | 6 +++--- tools/virtio/vringh_test.c | 18 +++++++++--------- 3 files changed, 15 insertions(+), 15 deletions(-) diff --git