org;
> > virtualizat...@lists.linux-foundation.org
> > Subject: Re: [virtio-dev] packed ring layout proposal v2
> >
> > On Sun, Jul 16, 2017 at 06:00:45AM +, Lior Narkis wrote:
> > > > -Original Message-
> > > > From: virtio-dev@lists.oasis-o
> -Original Message-
> From: Michael S. Tsirkin [mailto:m...@redhat.com]
> Sent: Tuesday, July 18, 2017 7:23 PM
> To: Lior Narkis
> Cc: virtio-dev@lists.oasis-open.org; virtualizat...@lists.linux-foundation.org
> Subject: Re: [virtio-dev] packed ring layout proposal v
> > To: virtio-dev@lists.oasis-open.org
> > Cc: virtualizat...@lists.linux-foundation.org
> > Subject: [virtio-dev] packed ring layout proposal v2
> >
> > This is an update from v1 version.
> > Changes:
> > - update event suppression mechanism
>
Subject: [virtio-dev] packed ring layout proposal v2
>
> This is an update from v1 version.
> Changes:
> - update event suppression mechanism
> - separate options for indirect and direct s/g
> - lots of new features
>
> ---
>
> Performance analysis of this is in my k
+Lior
- Original Message -
> From: "Michael S. Tsirkin"
> To: "Cornelia Huck"
> Cc: "Paolo Bonzini" ,
> virtualizat...@lists.linux-foundation.org, virtio-dev@lists.oasis-open.org
> Sent: Tuesday, March 7, 2017 10:33:57 PM
> Subject:
On Tue, Mar 07, 2017 at 04:53:53PM +0100, Cornelia Huck wrote:
> On Wed, 22 Feb 2017 18:43:05 +0200
> "Michael S. Tsirkin" wrote:
>
> > On Thu, Feb 09, 2017 at 05:11:05PM +0100, Cornelia Huck wrote:
> > > > >>> * Non power-of-2 ring sizes
> > > > >>>
> > > > >>> As the ring simply wraps around, t
On Wed, 22 Feb 2017 18:43:05 +0200
"Michael S. Tsirkin" wrote:
> On Thu, Feb 09, 2017 at 05:11:05PM +0100, Cornelia Huck wrote:
> > > >>> * Non power-of-2 ring sizes
> > > >>>
> > > >>> As the ring simply wraps around, there's no reason to
> > > >>> require ring size to be power of two.
> > > >>>
On Wed, Mar 01, 2017 at 06:14:21AM +0200, Michael S. Tsirkin wrote:
> > > > That said, if it's "16: 16" and if we use only 8 bits for batch, we
> > > > could still have another 8 bit for anything else, say the number of
> > > > desc for a single pkt. With that, the num_buffers of mergeable Rx
> > >
On Wed, Mar 01, 2017 at 11:57:15AM +0800, Yuanhan Liu wrote:
> On Wed, Mar 01, 2017 at 03:02:29AM +0200, Michael S. Tsirkin wrote:
> > > > * Descriptor ring:
> > > >
> > > > Guest adds descriptors with unique index values and DESC_HW set in
> > > > flags.
> > > > Host overwrites used descriptors
On Wed, Mar 01, 2017 at 03:02:29AM +0200, Michael S. Tsirkin wrote:
> > > * Descriptor ring:
> > >
> > > Guest adds descriptors with unique index values and DESC_HW set in flags.
> > > Host overwrites used descriptors with correct len, index, and DESC_HW
> > > clear. Flags are always set/cleared
On Tue, Feb 28, 2017 at 01:02:18PM +0800, Yuanhan Liu wrote:
> On Wed, Feb 08, 2017 at 05:20:14AM +0200, Michael S. Tsirkin wrote:
> > This is an update from v1 version.
> > Changes:
> > - update event suppression mechanism
> > - separate options for indirect and direct s/g
> > - lots of new featur
On Wed, Feb 08, 2017 at 05:20:14AM +0200, Michael S. Tsirkin wrote:
> This is an update from v1 version.
> Changes:
> - update event suppression mechanism
> - separate options for indirect and direct s/g
> - lots of new features
>
> ---
>
> Performance analysis of this is in my kvm forum 2016 pre
On Thu, Feb 09, 2017 at 05:11:05PM +0100, Cornelia Huck wrote:
> > >>> * Non power-of-2 ring sizes
> > >>>
> > >>> As the ring simply wraps around, there's no reason to
> > >>> require ring size to be power of two.
> > >>> It can be made a separate feature though.
> > >>
> > >> Power of 2 ring size
From: virtio-dev@lists.oasis-open.org [mailto:virtio-dev@lists.oasis-open.org]
On Behalf Of Michael S. Tsirkin
Sent: Wednesday, February 8, 2017 11:20 AM
To: virtio-dev@lists.oasis-open.org
Cc: virtualizat...@lists.linux-foundation.org
Subject: [virtio-dev] packed ring layout proposal v2
This i
- Original Message -
> From: "Michael S. Tsirkin"
> To: "Paolo Bonzini"
> Cc: virtio-dev@lists.oasis-open.org, virtualizat...@lists.linux-foundation.org
> Sent: Friday, February 10, 2017 4:20:17 PM
> Subject: Re: [virtio-dev] packed ring layout propo
On Fri, Feb 10, 2017 at 12:32:49PM +0100, Paolo Bonzini wrote:
>
>
> On 09/02/2017 19:24, Michael S. Tsirkin wrote:
> >> I don't know. Power of 2 ring size is pretty standard, I'd rather avoid
> >> the complication and the gratuitous difference with 1.0.
> >
> > I thought originally there's a re
On 09/02/2017 19:24, Michael S. Tsirkin wrote:
>> I don't know. Power of 2 ring size is pretty standard, I'd rather avoid
>> the complication and the gratuitous difference with 1.0.
>
> I thought originally there's a reason 1.0 rings had to be powers of two
> but now I don't see why. OK, we can
On Thu, Feb 09, 2017 at 04:48:53PM +0100, Paolo Bonzini wrote:
>
>
> On 08/02/2017 20:59, Michael S. Tsirkin wrote:
> > We couldn't decide what's better for everyone in 1.0 days and I doubt
> > we'll be able to now, but yes, benchmarking is needed to make
> > sire it's required. Very easy to remo
On Thu, 9 Feb 2017 16:48:53 +0100
Paolo Bonzini wrote:
> On 08/02/2017 20:59, Michael S. Tsirkin wrote:
> > We couldn't decide what's better for everyone in 1.0 days and I doubt
> > we'll be able to now, but yes, benchmarking is needed to make
> > sire it's required. Very easy to remove or not to
On 08/02/2017 20:59, Michael S. Tsirkin wrote:
> We couldn't decide what's better for everyone in 1.0 days and I doubt
> we'll be able to now, but yes, benchmarking is needed to make
> sire it's required. Very easy to remove or not to use/support in
> drivers/devices though.
Fair enough, but of
On Wed, Feb 08, 2017 at 06:41:40PM +0100, Paolo Bonzini wrote:
>
>
> On 08/02/2017 04:20, Michael S. Tsirkin wrote:
> > * Scatter/gather support
> >
> > We can use 1 bit to chain s/g entries in a request, same as virtio 1.0:
> >
> > /* This marks a buffer as continuing via the next field. */
>
On 08/02/2017 04:20, Michael S. Tsirkin wrote:
> * Scatter/gather support
>
> We can use 1 bit to chain s/g entries in a request, same as virtio 1.0:
>
> /* This marks a buffer as continuing via the next field. */
> #define VRING_DESC_F_NEXT 1
>
> Unlike virtio 1.0, all descriptors must
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