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...of splitting it out? It's confusing, and in fact it made you miss a bug. > --- > drivers/vhost/vhost.c | 13 +++++++++++++ > drivers/vhost/vhost.h | 1 + > 2 files changed, 14 insertions(+) > > diff --git a/drivers/vhost/vhost.c b/drivers/vhost/vhost.c > index 163b365..4f45a03 100644 > --- a/drivers/vhost/vhost.c > +++ b/drivers/vhost/vhost.c > @@ -1633,6 +1633,19 @@ void vhost_add_used_and_signal_n(struct vhost_dev *dev, > } > EXPORT_SYMBOL_GPL(vhost_add_used_and_signal_n); > > +bool vhost_vq_more_avail(struct vhost_dev *dev, struct vhost_virtqu...

...of splitting it out? It's confusing, and in fact it made you miss a bug. > --- > drivers/vhost/vhost.c | 13 +++++++++++++ > drivers/vhost/vhost.h | 1 + > 2 files changed, 14 insertions(+) > > diff --git a/drivers/vhost/vhost.c b/drivers/vhost/vhost.c > index 163b365..4f45a03 100644 > --- a/drivers/vhost/vhost.c > +++ b/drivers/vhost/vhost.c > @@ -1633,6 +1633,19 @@ void vhost_add_used_and_signal_n(struct vhost_dev *dev, > } > EXPORT_SYMBOL_GPL(vhost_add_used_and_signal_n); > > +bool vhost_vq_more_avail(struct vhost_dev *dev, struct vhost_virtqu...

Hi all: This series tries to add basic busy polling for vhost net. The idea is simple: at the end of tx/rx processing, busy polling for new tx added descriptor and rx receive socket for a while. The maximum number of time (in us) could be spent on busy polling was specified ioctl. Test A were done through: - 50 us as busy loop timeout - Netperf 2.6 - Two machines with back to back connected

Hi all: This series tries to add basic busy polling for vhost net. The idea is simple: at the end of tx/rx processing, busy polling for new tx added descriptor and rx receive socket for a while. The maximum number of time (in us) could be spent on busy polling was specified ioctl. Test A were done through: - 50 us as busy loop timeout - Netperf 2.6 - Two machines with back to back connected

Signed-off-by: Jason Wang <jasowang at redhat.com> --- drivers/vhost/vhost.c | 13 +++++++++++++ drivers/vhost/vhost.h | 1 + 2 files changed, 14 insertions(+) diff --git a/drivers/vhost/vhost.c b/drivers/vhost/vhost.c index 163b365..4f45a03 100644 --- a/drivers/vhost/vhost.c +++ b/drivers/vhost/vhost.c @@ -1633,6 +1633,19 @@ void vhost_add_used_and_signal_n(struct vhost_dev *dev, } EXPORT_SYMBOL_GPL(vhost_add_used_and_signal_n); +bool vhost_vq_more_avail(struct vhost_dev *dev, struct vhost_virtqueue *vq) +{ + __virtio16 avail_idx;...

...ile ((sock_len = peek_head_len(sock->sk))) { + while ((sock_len = vhost_net_peek_head_len(net, sock->sk))) { sock_len += sock_hlen; vhost_len = sock_len + vhost_hlen; headcount = get_rx_bufs(vq, vq->heads, vhost_len, diff --git a/drivers/vhost/vhost.c b/drivers/vhost/vhost.c index 4f45a03..b8ca873 100644 --- a/drivers/vhost/vhost.c +++ b/drivers/vhost/vhost.c @@ -285,6 +285,7 @@ static void vhost_vq_reset(struct vhost_dev *dev, vq->memory = NULL; vq->is_le = virtio_legacy_is_little_endian(); vhost_vq_reset_user_be(vq); + vq->busyloop_timeout = 0; } static int vhos...

...(sock->sk))) { > + while ((sock_len = vhost_net_peek_head_len(net, sock->sk))) { > sock_len += sock_hlen; > vhost_len = sock_len + vhost_hlen; > headcount = get_rx_bufs(vq, vq->heads, vhost_len, > diff --git a/drivers/vhost/vhost.c b/drivers/vhost/vhost.c > index 4f45a03..b8ca873 100644 > --- a/drivers/vhost/vhost.c > +++ b/drivers/vhost/vhost.c > @@ -285,6 +285,7 @@ static void vhost_vq_reset(struct vhost_dev *dev, > vq->memory = NULL; > vq->is_le = virtio_legacy_is_little_endian(); > vhost_vq_reset_user_be(vq); > + vq->busyloop...

...(sock->sk))) { > + while ((sock_len = vhost_net_peek_head_len(net, sock->sk))) { > sock_len += sock_hlen; > vhost_len = sock_len + vhost_hlen; > headcount = get_rx_bufs(vq, vq->heads, vhost_len, > diff --git a/drivers/vhost/vhost.c b/drivers/vhost/vhost.c > index 4f45a03..b8ca873 100644 > --- a/drivers/vhost/vhost.c > +++ b/drivers/vhost/vhost.c > @@ -285,6 +285,7 @@ static void vhost_vq_reset(struct vhost_dev *dev, > vq->memory = NULL; > vq->is_le = virtio_legacy_is_little_endian(); > vhost_vq_reset_user_be(vq); > + vq->busyloop...