Displaying 5 results from an estimated 5 matches for "get_mergeable_buf_ctx_base".
2014 Jan 09
3
[PATCH net-next v2 3/4] virtio-net: auto-tune mergeable rx buffer size for improved performance
...le buffer context. */
static u16 get_mergeable_buf_ctx_len(void *ctx) {
u16 len = (uintptr_t)ctx & (MERGEABLE_BUFFER_ALIGN - 1);
return MERGEABLE_BUFFER_MIN + (len << MERGEABLE_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 >...
2014 Jan 09
3
[PATCH net-next v2 3/4] virtio-net: auto-tune mergeable rx buffer size for improved performance
...le buffer context. */
static u16 get_mergeable_buf_ctx_len(void *ctx) {
u16 len = (uintptr_t)ctx & (MERGEABLE_BUFFER_ALIGN - 1);
return MERGEABLE_BUFFER_MIN + (len << MERGEABLE_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 >...
2014 Jan 09
0
[PATCH net-next v2 3/4] virtio-net: auto-tune mergeable rx buffer size for improved performance
...<< MERGEABLE_BUFFER_SHIFT);
You can just do len * MERGEABLE_BUFFER_ALIGN too - my compiler seems
to be smart enough to see it's same.
This way there's no need for MERGEABLE_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);
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 -= MERGEAB...
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