search for: vring_packed_event_flag_en

...you add a buffer. It's unreliable, so it's simply an optimization. Guest > * will still kick if it's out of buffers. */ > @@ -53,6 +60,23 @@ > * optimization. */ > #define VRING_AVAIL_F_NO_INTERRUPT 1 > > +/* Enable events in packed ring. */ > +#define VRING_PACKED_EVENT_FLAG_ENABLE 0x0 > +/* Disable events in packed ring. */ > +#define VRING_PACKED_EVENT_FLAG_DISABLE 0x1 > +/* > + * Enable events for a specific descriptor in packed ring. > + * (as specified by Descriptor Ring Change Event Offset/Wrap Counter). > + * Only valid if VIRTIO_RING_F_EVENT_IDX...

...you add a buffer. It's unreliable, so it's simply an optimization. Guest > * will still kick if it's out of buffers. */ > @@ -53,6 +60,23 @@ > * optimization. */ > #define VRING_AVAIL_F_NO_INTERRUPT 1 > > +/* Enable events in packed ring. */ > +#define VRING_PACKED_EVENT_FLAG_ENABLE 0x0 > +/* Disable events in packed ring. */ > +#define VRING_PACKED_EVENT_FLAG_DISABLE 0x1 > +/* > + * Enable events for a specific descriptor in packed ring. > + * (as specified by Descriptor Ring Change Event Offset/Wrap Counter). > + * Only valid if VIRTIO_RING_F_EVENT_IDX...

...s out of buffers. */ > > > > > > @@ -53,6 +60,23 @@ > > > > > > * optimization. */ > > > > > > #define VRING_AVAIL_F_NO_INTERRUPT 1 > > > > > > +/* Enable events in packed ring. */ > > > > > > +#define VRING_PACKED_EVENT_FLAG_ENABLE 0x0 > > > > > > +/* Disable events in packed ring. */ > > > > > > +#define VRING_PACKED_EVENT_FLAG_DISABLE 0x1 > > > > > > +/* > > > > > > + * Enable events for a specific descriptor in packed ring. > > > > >...

...s out of buffers. */ > > > > > > @@ -53,6 +60,23 @@ > > > > > > * optimization. */ > > > > > > #define VRING_AVAIL_F_NO_INTERRUPT 1 > > > > > > +/* Enable events in packed ring. */ > > > > > > +#define VRING_PACKED_EVENT_FLAG_ENABLE 0x0 > > > > > > +/* Disable events in packed ring. */ > > > > > > +#define VRING_PACKED_EVENT_FLAG_DISABLE 0x1 > > > > > > +/* > > > > > > + * Enable events for a specific descriptor in packed ring. > > > > >...

...> > @@ -53,6 +60,23 @@ > > > > > > > > * optimization. */ > > > > > > > > #define VRING_AVAIL_F_NO_INTERRUPT 1 > > > > > > > > +/* Enable events in packed ring. */ > > > > > > > > +#define VRING_PACKED_EVENT_FLAG_ENABLE 0x0 > > > > > > > > +/* Disable events in packed ring. */ > > > > > > > > +#define VRING_PACKED_EVENT_FLAG_DISABLE 0x1 > > > > > > > > +/* > > > > > > > > + * Enable events for a specific descriptor...

...> > @@ -53,6 +60,23 @@ > > > > > > > > * optimization. */ > > > > > > > > #define VRING_AVAIL_F_NO_INTERRUPT 1 > > > > > > > > +/* Enable events in packed ring. */ > > > > > > > > +#define VRING_PACKED_EVENT_FLAG_ENABLE 0x0 > > > > > > > > +/* Disable events in packed ring. */ > > > > > > > > +#define VRING_PACKED_EVENT_FLAG_DISABLE 0x1 > > > > > > > > +/* > > > > > > > > + * Enable events for a specific descriptor...

...the Guest: don't kick me when * you add a buffer. It's unreliable, so it's simply an optimization. Guest * will still kick if it's out of buffers. */ @@ -53,6 +60,23 @@ * optimization. */ #define VRING_AVAIL_F_NO_INTERRUPT 1 +/* Enable events in packed ring. */ +#define VRING_PACKED_EVENT_FLAG_ENABLE 0x0 +/* Disable events in packed ring. */ +#define VRING_PACKED_EVENT_FLAG_DISABLE 0x1 +/* + * Enable events for a specific descriptor in packed ring. + * (as specified by Descriptor Ring Change Event Offset/Wrap Counter). + * Only valid if VIRTIO_RING_F_EVENT_IDX has been negotiated. + */ +#de...

...#39;s unreliable, so it's simply an optimization. Guest > > * will still kick if it's out of buffers. */ > > @@ -53,6 +60,23 @@ > > * optimization. */ > > #define VRING_AVAIL_F_NO_INTERRUPT 1 > > +/* Enable events in packed ring. */ > > +#define VRING_PACKED_EVENT_FLAG_ENABLE 0x0 > > +/* Disable events in packed ring. */ > > +#define VRING_PACKED_EVENT_FLAG_DISABLE 0x1 > > +/* > > + * Enable events for a specific descriptor in packed ring. > > + * (as specified by Descriptor Ring Change Event Offset/Wrap Counter). > > + * Only val...

...ill still kick if it's out of buffers. */ > > > > > @@ -53,6 +60,23 @@ > > > > > * optimization. */ > > > > > #define VRING_AVAIL_F_NO_INTERRUPT 1 > > > > > +/* Enable events in packed ring. */ > > > > > +#define VRING_PACKED_EVENT_FLAG_ENABLE 0x0 > > > > > +/* Disable events in packed ring. */ > > > > > +#define VRING_PACKED_EVENT_FLAG_DISABLE 0x1 > > > > > +/* > > > > > + * Enable events for a specific descriptor in packed ring. > > > > > + * (as specified b...

...> > > > > > @@ -53,6 +60,23 @@ > > > > > > > * optimization. */ > > > > > > > #define VRING_AVAIL_F_NO_INTERRUPT 1 > > > > > > > +/* Enable events in packed ring. */ > > > > > > > +#define VRING_PACKED_EVENT_FLAG_ENABLE 0x0 > > > > > > > +/* Disable events in packed ring. */ > > > > > > > +#define VRING_PACKED_EVENT_FLAG_DISABLE 0x1 > > > > > > > +/* > > > > > > > + * Enable events for a specific descriptor in packed ring. >...

...+60,23 @@ > > > > > > > > > * optimization. */ > > > > > > > > > #define VRING_AVAIL_F_NO_INTERRUPT 1 > > > > > > > > > +/* Enable events in packed ring. */ > > > > > > > > > +#define VRING_PACKED_EVENT_FLAG_ENABLE 0x0 > > > > > > > > > +/* Disable events in packed ring. */ > > > > > > > > > +#define VRING_PACKED_EVENT_FLAG_DISABLE 0x1 > > > > > > > > > +/* > > > > > > > > > + * Enable events for a...

Hi, This patch set implements packed ring support in virtio driver. A performance test between pktgen (pktgen_sample03_burst_single_flow.sh) and DPDK vhost (testpmd/rxonly/vhost-PMD) has been done, I saw ~30% performance gain in packed ring in this case. To make this patch set work with below patch set for vhost, some hacks are needed to set the _F_NEXT flag in indirect descriptors (this should

Hi, This patch set implements packed ring support in virtio driver. A performance test between pktgen (pktgen_sample03_burst_single_flow.sh) and DPDK vhost (testpmd/rxonly/vhost-PMD) has been done, I saw ~30% performance gain in packed ring in this case. To make this patch set work with below patch set for vhost, some hacks are needed to set the _F_NEXT flag in indirect descriptors (this should

This is a follow up of the discussion in this thread: https://patchwork.ozlabs.org/patch/1001015/#2042353 Tiwei Bie (3): virtio_ring: define flags as shifts consistently virtio_ring: add VIRTIO_RING_NO_LEGACY virtio_ring: use new vring flags drivers/virtio/virtio_ring.c | 100 ++++++++++++++++++------------- include/uapi/linux/virtio_ring.h | 61 +++++++++++++------ 2 files changed,

This is a follow up of the discussion in this thread: https://patchwork.ozlabs.org/patch/1001015/#2042353 Tiwei Bie (3): virtio_ring: define flags as shifts consistently virtio_ring: add VIRTIO_RING_NO_LEGACY virtio_ring: use new vring flags drivers/virtio/virtio_ring.c | 100 ++++++++++++++++++------------- include/uapi/linux/virtio_ring.h | 61 +++++++++++++------ 2 files changed,

Hi all: This series implements packed virtqueues which were described at [1]. In this version we try to address the performance regression saw by V2. The root cause is packed virtqueue need more times of userspace memory accesssing which turns out to be very expensive. Thanks to the help of 7f466032dc9e ("vhost: access vq metadata through kernel virtual address"), such overhead cold be

Hi all: This series implements packed virtqueues which were described at [1]. In this version we try to address the performance regression saw by V2. The root cause is packed virtqueue need more times of userspace memory accesssing which turns out to be very expensive. Thanks to the help of 7f466032dc9e ("vhost: access vq metadata through kernel virtual address"), such overhead cold be