similar to: [PATCH] Fix used_idx wrap-around in virtio

Generally, the Host end of the virtio ring doesn't need to see where Guest is up to in consuming the ring. However, to completely understand what's going on from the outside, this information must be exposed. For example, host can reduce the number of interrupts by detecting that the guest is currently handling previous buffers. Fortunately, we have room to expand: the ring is always a

Generally, the Host end of the virtio ring doesn't need to see where Guest is up to in consuming the ring. However, to completely understand what's going on from the outside, this information must be exposed. For example, host can reduce the number of interrupts by detecting that the guest is currently handling previous buffers. Fortunately, we have room to expand: the ring is always a

On 2018?04?01? 22:12, Tiwei Bie wrote: > Hello everyone, > > This RFC implements packed ring support for virtio driver. > > The code was tested with DPDK vhost (testpmd/vhost-PMD) implemented > by Jens at http://dpdk.org/ml/archives/dev/2018-January/089417.html > Minor changes are needed for the vhost code, e.g. to kick the guest. > > TODO: > - Refinements and bug

On 2018?04?01? 22:12, Tiwei Bie wrote: > Hello everyone, > > This RFC implements packed ring support for virtio driver. > > The code was tested with DPDK vhost (testpmd/vhost-PMD) implemented > by Jens at http://dpdk.org/ml/archives/dev/2018-January/089417.html > Minor changes are needed for the vhost code, e.g. to kick the guest. > > TODO: > - Refinements and bug

On Tue, Nov 10, 2015 at 04:21:07PM -0800, Venkatesh Srinivas wrote: > Improves cacheline transfer flow of available ring header. > > Virtqueues are implemented as a pair of rings, one producer->consumer > avail ring and one consumer->producer used ring; preceding the > avail ring in memory are two contiguous u16 fields -- avail->flags > and avail->idx. A producer

This commit introduces the support for creating packed ring. All split ring specific functions are added _split suffix. Some necessary stubs for packed ring are also added. Signed-off-by: Tiwei Bie <tiwei.bie at intel.com> --- drivers/virtio/virtio_ring.c | 801 +++++++++++++++++++++++------------ include/linux/virtio_ring.h | 8 +- 2 files changed, 546 insertions(+), 263 deletions(-)

This commit introduces the support for creating packed ring. All split ring specific functions are added _split suffix. Some necessary stubs for packed ring are also added. Signed-off-by: Tiwei Bie <tiwei.bie at intel.com> --- drivers/virtio/virtio_ring.c | 801 +++++++++++++++++++++++------------ include/linux/virtio_ring.h | 8 +- 2 files changed, 546 insertions(+), 263 deletions(-)

Signed-off-by: Tiwei Bie <tiwei.bie at intel.com> --- drivers/virtio/virtio_ring.c | 699 +++++++++++++++++++++++++++++++++++++------ include/linux/virtio_ring.h | 8 +- 2 files changed, 618 insertions(+), 89 deletions(-) diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c index eb30f3e09a47..393778a2f809 100644 --- a/drivers/virtio/virtio_ring.c +++

On Tue, Oct 07, 2014 at 04:39:45PM +0200, Cornelia Huck wrote: > From: Rusty Russell <rusty at rustcorp.com.au> > > [Cornelia Huck: we don't need the vq->vring.num -> vq->ring_mask change] > Signed-off-by: Rusty Russell <rusty at rustcorp.com.au> > Signed-off-by: Cornelia Huck <cornelia.huck at de.ibm.com> > --- > drivers/virtio/virtio_ring.c |

On Fri, Mar 16, 2018 at 12:03:25PM +0800, Jason Wang wrote: > On 2018?02?23? 19:18, Tiwei Bie wrote: > > Signed-off-by: Tiwei Bie <tiwei.bie at intel.com> > > --- > > drivers/virtio/virtio_ring.c | 699 +++++++++++++++++++++++++++++++++++++------ > > include/linux/virtio_ring.h | 8 +- > > 2 files changed, 618 insertions(+), 89 deletions(-) > >

From: Rusty Russell <rusty at rustcorp.com.au> [Cornelia Huck: we don't need the vq->vring.num -> vq->ring_mask change] Signed-off-by: Rusty Russell <rusty at rustcorp.com.au> Signed-off-by: Cornelia Huck <cornelia.huck at de.ibm.com> --- drivers/virtio/virtio_ring.c | 195 ++++++++++++++++++++++++++++++------------ 1 file changed, 138 insertions(+), 57

From: Rusty Russell <rusty at rustcorp.com.au> [Cornelia Huck: we don't need the vq->vring.num -> vq->ring_mask change] Signed-off-by: Rusty Russell <rusty at rustcorp.com.au> Signed-off-by: Cornelia Huck <cornelia.huck at de.ibm.com> --- drivers/virtio/virtio_ring.c | 195 ++++++++++++++++++++++++++++++------------ 1 file changed, 138 insertions(+), 57

Improves cacheline transfer flow of available ring header. Virtqueues are implemented as a pair of rings, one producer->consumer avail ring and one consumer->producer used ring; preceding the avail ring in memory are two contiguous u16 fields -- avail->flags and avail->idx. A producer posts work by writing to avail->idx and a consumer reads avail->idx. The flags and idx fields

Improves cacheline transfer flow of available ring header. Virtqueues are implemented as a pair of rings, one producer->consumer avail ring and one consumer->producer used ring; preceding the avail ring in memory are two contiguous u16 fields -- avail->flags and avail->idx. A producer posts work by writing to avail->idx and a consumer reads avail->idx. The flags and idx fields

On 2018?05?22? 16:16, Tiwei Bie wrote: > This commit introduces the support for creating packed ring. > All split ring specific functions are added _split suffix. > Some necessary stubs for packed ring are also added. > > Signed-off-by: Tiwei Bie <tiwei.bie at intel.com> > --- > drivers/virtio/virtio_ring.c | 801 +++++++++++++++++++++++------------ >

On 2018?05?22? 16:16, Tiwei Bie wrote: > This commit introduces the support for creating packed ring. > All split ring specific functions are added _split suffix. > Some necessary stubs for packed ring are also added. > > Signed-off-by: Tiwei Bie <tiwei.bie at intel.com> > --- > drivers/virtio/virtio_ring.c | 801 +++++++++++++++++++++++------------ >

Hello everyone, This RFC implements packed ring support for virtio driver. The code was tested with DPDK vhost (testpmd/vhost-PMD) implemented by Jens at http://dpdk.org/ml/archives/dev/2018-January/089417.html Minor changes are needed for the vhost code, e.g. to kick the guest. TODO: - Refinements and bug fixes; - Split into small patches; - Test indirect descriptor support; - Test/fix event

Hello everyone, This RFC implements packed ring support for virtio driver. The code was tested with DPDK vhost (testpmd/vhost-PMD) implemented by Jens at http://dpdk.org/ml/archives/dev/2018-January/089417.html Minor changes are needed for the vhost code, e.g. to kick the guest. TODO: - Refinements and bug fixes; - Split into small patches; - Test indirect descriptor support; - Test/fix event

On Wed, May 02, 2018 at 04:51:01PM +0300, Michael S. Tsirkin wrote: > On Wed, May 02, 2018 at 03:28:19PM +0800, Tiwei Bie wrote: > > On Wed, May 02, 2018 at 10:51:06AM +0800, Jason Wang wrote: > > > On 2018?04?25? 13:15, Tiwei Bie wrote: > > > > This commit introduces the event idx support in packed > > > > ring. This feature is temporarily disabled,

On Thu, May 03, 2018 at 04:44:39AM +0300, Michael S. Tsirkin wrote: > On Thu, May 03, 2018 at 09:11:16AM +0800, Tiwei Bie wrote: > > On Wed, May 02, 2018 at 06:42:57PM +0300, Michael S. Tsirkin wrote: > > > On Wed, May 02, 2018 at 11:12:55PM +0800, Tiwei Bie wrote: > > > > On Wed, May 02, 2018 at 04:51:01PM +0300, Michael S. Tsirkin wrote: > > > > > On