Displaying 3 results from an estimated 3 matches for "rceil".
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2017 Sep 11
0
packed ring layout proposal v3
...ER 0x0080
>
> struct desc {
> __le64 addr;
> __le32 len;
> __le16 index;
> __le16 flags;
> };
>
> Fields:
>
> addr - physical address of a s/g entry
> len - length of an entry
> index - unique index. The low $\lceil log(N) \rceil - 1$
> bits of the index is a driver-supplied value which can have any value
> (under driver control). The high bits are reserved and should be
> set to 0.
Drivers usually have their own information ring, so I'm not sure
exposing such flexibility is really neede...
2017 Feb 08
16
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 kvm forum 2016 presentation.
The idea is to have a r/w descriptor in a ring structure,
replacing the used and available ring, index and descriptor
buffer.
* Descriptor ring:
Guest adds descriptors with
2017 Feb 08
16
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 kvm forum 2016 presentation.
The idea is to have a r/w descriptor in a ring structure,
replacing the used and available ring, index and descriptor
buffer.
* Descriptor ring:
Guest adds descriptors with