Displaying 5 results from an estimated 5 matches for "mergeable_buffer_min".
2014 Jan 09
3
[PATCH net-next v2 3/4] virtio-net: auto-tune mergeable rx buffer size for improved performance
...64 byte alignment, and
this code supports all current buffer sizes, from 1536 to PAGE_SIZE.
#if L1_CACHE_BYTES < 64
#define MERGEABLE_BUFFER_ALIGN 64
#define MERGEABLE_BUFFER_SHIFT 6
#else
#define MERGEABLE_BUFFER_ALIGN L1_CACHE_BYTES
#define MERGEABLE_BUFFER_SHIFT L1_CACHE_SHIFT
#endif
#define MERGEABLE_BUFFER_MIN ALIGN(GOOD_PACKET_LEN +
sizeof(virtio_net_hdr_mrg_rbuf),
MERGEABLE_BUFFER_ALIGN)
#define MERGEABLE_BUFFER_MAX min(MERGEABLE_BUFFER_MIN +
(MERGEABLE_BUFFER_ALIGN - 1) *...
2014 Jan 09
3
[PATCH net-next v2 3/4] virtio-net: auto-tune mergeable rx buffer size for improved performance
...64 byte alignment, and
this code supports all current buffer sizes, from 1536 to PAGE_SIZE.
#if L1_CACHE_BYTES < 64
#define MERGEABLE_BUFFER_ALIGN 64
#define MERGEABLE_BUFFER_SHIFT 6
#else
#define MERGEABLE_BUFFER_ALIGN L1_CACHE_BYTES
#define MERGEABLE_BUFFER_SHIFT L1_CACHE_SHIFT
#endif
#define MERGEABLE_BUFFER_MIN ALIGN(GOOD_PACKET_LEN +
sizeof(virtio_net_hdr_mrg_rbuf),
MERGEABLE_BUFFER_ALIGN)
#define MERGEABLE_BUFFER_MAX min(MERGEABLE_BUFFER_MIN +
(MERGEABLE_BUFFER_ALIGN - 1) *...
2014 Jan 09
0
[PATCH net-next v2 3/4] virtio-net: auto-tune mergeable rx buffer size for improved performance
...oad that's improved by it, which I doubt.
>
> #if L1_CACHE_BYTES < 64
> #define MERGEABLE_BUFFER_ALIGN 64
> #define MERGEABLE_BUFFER_SHIFT 6
> #else
> #define MERGEABLE_BUFFER_ALIGN L1_CACHE_BYTES
> #define MERGEABLE_BUFFER_SHIFT L1_CACHE_SHIFT
> #endif
> #define MERGEABLE_BUFFER_MIN ALIGN(GOOD_PACKET_LEN +
> sizeof(virtio_net_hdr_mrg_rbuf),
> MERGEABLE_BUFFER_ALIGN)
> #define MERGEABLE_BUFFER_MAX min(MERGEABLE_BUFFER_MIN +
> (MERGEABLE_BUFFER_ALIGN - 1) *
>...
2014 Jan 09
2
[PATCH net-next v2 3/4] virtio-net: auto-tune mergeable rx buffer size for improved performance
Sorry, forgot to mention - if we want to explore combining the buffer
address and truesize into a single void *, we could also exploit the
fact that our size ranges from aligned GOOD_PACKET_LEN to PAGE_SIZE, and
potentially encode fewer values for truesize (and require a smaller
alignment than 256). The prior e-mails discussion of 256 byte alignment
with 256 values is just one potential design
2014 Jan 09
2
[PATCH net-next v2 3/4] virtio-net: auto-tune mergeable rx buffer size for improved performance
Sorry, forgot to mention - if we want to explore combining the buffer
address and truesize into a single void *, we could also exploit the
fact that our size ranges from aligned GOOD_PACKET_LEN to PAGE_SIZE, and
potentially encode fewer values for truesize (and require a smaller
alignment than 256). The prior e-mails discussion of 256 byte alignment
with 256 values is just one potential design