Displaying 5 results from an estimated 5 matches for "to_mergeable_buf_ctx".
2014 Jan 09
3
[PATCH net-next v2 3/4] virtio-net: auto-tune mergeable rx buffer size for improved performance
...GEABLE_BUFFER_SHIFT);
}
/* Extract buffer base address from a mergeable buffer context. */
static void *get_mergeable_buf_ctx_base(void *ctx) {
return (void *) ((uintptr)ctx & -MERGEABLE_BUFFER_ALIGN);
}
/* Convert a base address and length to a mergeable buffer context. */
static void *to_mergeable_buf_ctx(void *base, u16 len) {
len -= MERGEABLE_BUFFER_MIN;
return (void *) ((uintptr)base | (len >> MERGEABLE_BUFFER_SHIFT));
}
/* Compute the packet buffer length for a receive queue. */
static u16 get_mergeable_buffer_len(struct receive_queue *rq) {
u16 len = clamp_t(u16, M...
2014 Jan 09
3
[PATCH net-next v2 3/4] virtio-net: auto-tune mergeable rx buffer size for improved performance
...GEABLE_BUFFER_SHIFT);
}
/* Extract buffer base address from a mergeable buffer context. */
static void *get_mergeable_buf_ctx_base(void *ctx) {
return (void *) ((uintptr)ctx & -MERGEABLE_BUFFER_ALIGN);
}
/* Convert a base address and length to a mergeable buffer context. */
static void *to_mergeable_buf_ctx(void *base, u16 len) {
len -= MERGEABLE_BUFFER_MIN;
return (void *) ((uintptr)base | (len >> MERGEABLE_BUFFER_SHIFT));
}
/* Compute the packet buffer length for a receive queue. */
static u16 get_mergeable_buffer_len(struct receive_queue *rq) {
u16 len = clamp_t(u16, M...
2014 Jan 09
0
[PATCH net-next v2 3/4] virtio-net: auto-tune mergeable rx buffer size for improved performance
...rgeable buffer context. */
> static void *get_mergeable_buf_ctx_base(void *ctx) {
> return (void *) ((uintptr)ctx & -MERGEABLE_BUFFER_ALIGN);
uintptr_t? or just unsigned long ...
> }
> /* Convert a base address and length to a mergeable buffer context. */
> static void *to_mergeable_buf_ctx(void *base, u16 len) {
> len -= MERGEABLE_BUFFER_MIN;
> return (void *) ((uintptr)base | (len >> MERGEABLE_BUFFER_SHIFT));
> }
The APIs are a bit inconsistent in naming.
Also it's unfortunate that we use void * for both virtio buffer
and frame memory.
How about...
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