search for: vhost_enable_notify_packed

...> + return vhost_notify_packed(dev, vq); > + else > + return vhost_notify_split(dev, vq); > +} > + > /* This actually signals the guest, using eventfd. */ > void vhost_signal(struct vhost_dev *dev, struct vhost_virtqueue *vq) > { > @@ -2802,10 +2930,34 @@ static bool vhost_enable_notify_packed(struct vhost_dev *dev, > struct vhost_virtqueue *vq) > { > struct vring_desc_packed *d = vq->desc_packed + vq->avail_idx; > - __virtio16 flags; > + __virtio16 flags = RING_EVENT_FLAGS_ENABLE; > int ret; > > - /* FIXME: disable notification through de...

...> + return vhost_notify_packed(dev, vq); > + else > + return vhost_notify_split(dev, vq); > +} > + > /* This actually signals the guest, using eventfd. */ > void vhost_signal(struct vhost_dev *dev, struct vhost_virtqueue *vq) > { > @@ -2802,10 +2930,34 @@ static bool vhost_enable_notify_packed(struct vhost_dev *dev, > struct vhost_virtqueue *vq) > { > struct vring_desc_packed *d = vq->desc_packed + vq->avail_idx; > - __virtio16 flags; > + __virtio16 flags = RING_EVENT_FLAGS_ENABLE; > int ret; > > - /* FIXME: disable notification through de...

..._empty_split(struct vhost_dev *dev, + struct vhost_virtqueue *vq) { __virtio16 avail_idx; int r; @@ -2280,10 +2506,61 @@ bool vhost_vq_avail_empty(struct vhost_dev *dev, struct vhost_virtqueue *vq) return vq->avail_idx == vq->last_avail_idx; } + +/* FIXME: unify codes with vhost_enable_notify_packed() */ +static bool vhost_vq_avail_empty_packed(struct vhost_dev *dev, + struct vhost_virtqueue *vq) +{ + struct vring_desc_packed desc; + int ret, i = vq->last_avail_idx & (vq->num - 1); + + ret = vhost_copy_from_user(vq, &desc, vq->desc_packed + i, + sizeof(desc)); + if (...

...> + return vhost_notify_packed(dev, vq); > + else > + return vhost_notify_split(dev, vq); > +} > + > /* This actually signals the guest, using eventfd. */ > void vhost_signal(struct vhost_dev *dev, struct vhost_virtqueue *vq) > { > @@ -2789,7 +2911,17 @@ static bool vhost_enable_notify_packed(struct vhost_dev *dev, > __virtio16 flags; > int ret; > > - /* FIXME: disable notification through device area */ > + if (!(vq->used_flags & VRING_USED_F_NO_NOTIFY)) > + return false; > + vq->used_flags &= ~VRING_USED_F_NO_NOTIFY; > + > + flags = cpu_...

On 2018?05?30? 19:42, Wei Xu wrote: >> /* This actually signals the guest, using eventfd. */ >> void vhost_signal(struct vhost_dev *dev, struct vhost_virtqueue *vq) >> { >> @@ -2802,10 +2930,34 @@ static bool vhost_enable_notify_packed(struct vhost_dev *dev, >> struct vhost_virtqueue *vq) >> { >> struct vring_desc_packed *d = vq->desc_packed + vq->avail_idx; >> - __virtio16 flags; >> + __virtio16 flags = RING_EVENT_FLAGS_ENABLE; >> int ret; >> >> - /* F...

Hi all: This RFC implement a subset of packed ring which was described at https://github.com/oasis-tcs/virtio-docs/blob/master/virtio-v1.1-packed-wd07.pdf . The code were tested with pmd implement by Jens at http://dpdk.org/ml/archives/dev/2018-January/089417.html. Minor change was needed for pmd codes to kick virtqueue since it assumes a busy polling backend. Test were done between localhost

Hi all: This RFC implement a subset of packed ring which was described at https://github.com/oasis-tcs/virtio-docs/blob/master/virtio-v1.1-packed-wd07.pdf . The code were tested with pmd implement by Jens at http://dpdk.org/ml/archives/dev/2018-January/089417.html. Minor change was needed for pmd codes to kick virtqueue since it assumes a busy polling backend. Test were done between localhost

...ED)) + return vhost_vq_avail_empty_packed(dev, vq); + else + return vhost_vq_avail_empty_split(dev, vq); +} EXPORT_SYMBOL_GPL(vhost_vq_avail_empty); -/* OK, now we need to know about added descriptors. */ -bool vhost_enable_notify(struct vhost_dev *dev, struct vhost_virtqueue *vq) +static bool vhost_enable_notify_packed(struct vhost_dev *dev, + struct vhost_virtqueue *vq) +{ + struct vring_desc_packed *d = vq->desc_packed + vq->last_avail_idx; + __virtio16 flags; + int ret; + + /* FIXME: disable notification through device area */ + + /* They could have slipped one in as we were doing that: make +...

...(vhost_has_feature(vq, VIRTIO_F_RING_PACKED)) + return vhost_notify_packed(dev, vq); + else + return vhost_notify_split(dev, vq); +} + /* This actually signals the guest, using eventfd. */ void vhost_signal(struct vhost_dev *dev, struct vhost_virtqueue *vq) { @@ -2762,7 +2883,17 @@ static bool vhost_enable_notify_packed(struct vhost_dev *dev, __virtio16 flags; int ret; - /* FIXME: disable notification through device area */ + if (!(vq->used_flags & VRING_USED_F_NO_NOTIFY)) + return false; + vq->used_flags &= ~VRING_USED_F_NO_NOTIFY; + + flags = cpu_to_vhost16(vq, RING_EVENT_FLAGS_ENABLE); + re...

...(vhost_has_feature(vq, VIRTIO_F_RING_PACKED)) + return vhost_notify_packed(dev, vq); + else + return vhost_notify_split(dev, vq); +} + /* This actually signals the guest, using eventfd. */ void vhost_signal(struct vhost_dev *dev, struct vhost_virtqueue *vq) { @@ -2789,7 +2911,17 @@ static bool vhost_enable_notify_packed(struct vhost_dev *dev, __virtio16 flags; int ret; - /* FIXME: disable notification through device area */ + if (!(vq->used_flags & VRING_USED_F_NO_NOTIFY)) + return false; + vq->used_flags &= ~VRING_USED_F_NO_NOTIFY; + + flags = cpu_to_vhost16(vq, RING_EVENT_FLAGS_ENABLE); + re...

...vhost_has_feature(vq, VIRTIO_F_RING_PACKED)) + return vhost_notify_packed(dev, vq); + else + return vhost_notify_split(dev, vq); +} + /* This actually signals the guest, using eventfd. */ void vhost_signal(struct vhost_dev *dev, struct vhost_virtqueue *vq) { @@ -2875,10 +3003,34 @@ static bool vhost_enable_notify_packed(struct vhost_dev *dev, struct vhost_virtqueue *vq) { struct vring_desc_packed *d = vq->desc_packed + vq->avail_idx; - __virtio16 flags; + __virtio16 flags = cpu_to_vhost16(vq, RING_EVENT_FLAGS_ENABLE); int ret; - /* TODO: enable notification through device area */ + if (!(v...

...vhost_has_feature(vq, VIRTIO_F_RING_PACKED)) + return vhost_notify_packed(dev, vq); + else + return vhost_notify_split(dev, vq); +} + /* This actually signals the guest, using eventfd. */ void vhost_signal(struct vhost_dev *dev, struct vhost_virtqueue *vq) { @@ -2802,10 +2930,34 @@ static bool vhost_enable_notify_packed(struct vhost_dev *dev, struct vhost_virtqueue *vq) { struct vring_desc_packed *d = vq->desc_packed + vq->avail_idx; - __virtio16 flags; + __virtio16 flags = RING_EVENT_FLAGS_ENABLE; int ret; - /* FIXME: disable notification through device area */ + if (!(vq->used_flags &...

...ED)) + return vhost_vq_avail_empty_packed(dev, vq); + else + return vhost_vq_avail_empty_split(dev, vq); +} EXPORT_SYMBOL_GPL(vhost_vq_avail_empty); -/* OK, now we need to know about added descriptors. */ -bool vhost_enable_notify(struct vhost_dev *dev, struct vhost_virtqueue *vq) +static bool vhost_enable_notify_packed(struct vhost_dev *dev, + struct vhost_virtqueue *vq) +{ + struct vring_packed_desc *d = vq->desc_packed + vq->avail_idx; + __virtio16 flags; + int ret; + + /* TODO: enable notification through device area */ + + /* They could have slipped one in as we were doing that: make + * sure...

...> + return vhost_notify_packed(dev, vq); > + else > + return vhost_notify_split(dev, vq); > +} > + > /* This actually signals the guest, using eventfd. */ > void vhost_signal(struct vhost_dev *dev, struct vhost_virtqueue *vq) > { > @@ -2875,10 +3003,34 @@ static bool vhost_enable_notify_packed(struct vhost_dev *dev, > struct vhost_virtqueue *vq) > { > struct vring_desc_packed *d = vq->desc_packed + vq->avail_idx; > - __virtio16 flags; > + __virtio16 flags = cpu_to_vhost16(vq, RING_EVENT_FLAGS_ENABLE); > int ret; > > - /* TODO: enable notif...

...> + return vhost_notify_packed(dev, vq); > + else > + return vhost_notify_split(dev, vq); > +} > + > /* This actually signals the guest, using eventfd. */ > void vhost_signal(struct vhost_dev *dev, struct vhost_virtqueue *vq) > { > @@ -2875,10 +3003,34 @@ static bool vhost_enable_notify_packed(struct vhost_dev *dev, > struct vhost_virtqueue *vq) > { > struct vring_desc_packed *d = vq->desc_packed + vq->avail_idx; > - __virtio16 flags; > + __virtio16 flags = cpu_to_vhost16(vq, RING_EVENT_FLAGS_ENABLE); > int ret; > > - /* TODO: enable notif...

Hi all: This RFC implement packed ring layout. The code were tested with pmd implement by Jens at http://dpdk.org/ml/archives/dev/2018-January/089417.html. Minor change was needed for pmd codes to kick virtqueue since it assumes a busy polling backend. Test were done between localhost and guest. Testpmd (rxonly) in guest reports 2.4Mpps. Testpmd (txonly) repots about 2.1Mpps. Notes: The event

Hi all: This RFC implement packed ring layout. The code were tested with pmd implement by Jens at http://dpdk.org/ml/archives/dev/2018-January/089417.html. Minor change was needed for pmd codes to kick virtqueue since it assumes a busy polling backend. Test were done between localhost and guest. Testpmd (rxonly) in guest reports 2.4Mpps. Testpmd (txonly) repots about 2.1Mpps. Notes: The event

Hi all: This RFC implement packed ring layout. The code were tested with Tiwei's RFC V5 at https://lkml.org/lkml/2018/5/22/138. Some fixups and tweaks were needed on top of Tiwei's code to make it run for event index. Pktgen reports about 20% improvement on TX PPS when doing pktgen from guest to host. No ovbious improvement on RX PPS. We can do lots of optimizations on top but for simple

Hi all: This series implements packed virtqueues. The code were tested with Tiwei's RFC V6 at https://lkml.org/lkml/2018/6/5/120. Pktgen test for both RX and TX does not show obvious difference with split virtqueues. The main bottleneck is the guest Linux driver, since it can not stress vhost for a 100% CPU utilization. A full TCP benchmark is ongoing. Will test virtio-net pmd as well when

Hi all: This series implements packed virtqueues. The code were tested with Tiwei's RFC V6 at https://lkml.org/lkml/2018/6/5/120. Pktgen test for both RX and TX does not show obvious difference with split virtqueues. The main bottleneck is the guest Linux driver, since it can not stress vhost for a 100% CPU utilization. A full TCP benchmark is ongoing. Will test virtio-net pmd as well when