On Fri, Jun 19, 2020 at 08:22:53PM +0200, Eugenio Pérez wrote: > From: "Michael S. Tsirkin" <m...@redhat.com> > > As testing shows no performance change, switch to that now. > > Signed-off-by: Michael S. Tsirkin <m...@redhat.com> > Signed-off-by: Eugenio Pérez <epere...@redhat.com> > Link: https://lore.kernel.org/r/20200401183118.8334-3-epere...@redhat.com > Signed-off-by: Michael S. Tsirkin <m...@redhat.com> > Signed-off-by: Eugenio Pérez <epere...@redhat.com> > --- > drivers/vhost/test.c | 2 +- > drivers/vhost/vhost.c | 314 ++++++++---------------------------------- > drivers/vhost/vhost.h | 7 +- > 3 files changed, 61 insertions(+), 262 deletions(-) > > diff --git a/drivers/vhost/test.c b/drivers/vhost/test.c > index a09dedc79f68..650e69261557 100644 > --- a/drivers/vhost/test.c > +++ b/drivers/vhost/test.c > @@ -119,7 +119,7 @@ static int vhost_test_open(struct inode *inode, struct > file *f) > dev = &n->dev; > vqs[VHOST_TEST_VQ] = &n->vqs[VHOST_TEST_VQ]; > n->vqs[VHOST_TEST_VQ].handle_kick = handle_vq_kick; > - vhost_dev_init(dev, vqs, VHOST_TEST_VQ_MAX, UIO_MAXIOV, > + vhost_dev_init(dev, vqs, VHOST_TEST_VQ_MAX, UIO_MAXIOV + 64, > VHOST_TEST_PKT_WEIGHT, VHOST_TEST_WEIGHT, true, NULL); > > f->private_data = n; > diff --git a/drivers/vhost/vhost.c b/drivers/vhost/vhost.c > index 2d784681b0fa..13021d6986eb 100644 > --- a/drivers/vhost/vhost.c > +++ b/drivers/vhost/vhost.c > @@ -304,6 +304,7 @@ static void vhost_vq_reset(struct vhost_dev *dev, > { > vq->num = 1; > vq->ndescs = 0; > + vq->first_desc = 0; > vq->desc = NULL; > vq->avail = NULL; > vq->used = NULL; > @@ -372,6 +373,11 @@ static int vhost_worker(void *data) > return 0; > } > > +static int vhost_vq_num_batch_descs(struct vhost_virtqueue *vq) > +{ > + return vq->max_descs - UIO_MAXIOV; > +} > + > static void vhost_vq_free_iovecs(struct vhost_virtqueue *vq) > { > kfree(vq->descs);
Batching is enabled if max_descs > UIO_MAXIOV. So this uses batching for test. But net is unchanged, so it is still not using the batched version. Is that right? I think a better subject would be "vhost/test: use batched get_vq_desc version". And that explains which testing it refers to: the one executed by vhost test. I think there was a separate patch to enable that for net separately, but it got lost - or did I miss it? -- MST
