Reorder its members to fill the current padding hole, reducing the
struct size from 32 to 24.
This struct appears multiple times inside struct anv_image and its
members, so this change brings down sizeof(struct anv_image) from
1744 to 1600.
We went from:
struct anv_image_memory_range {
enum anv_image_memory_binding binding; /* 0 4 */
/* XXX 4 bytes hole, try to pack */
uint64_t offset; /* 8 8 */
uint64_t size; /* 16 8 */
uint32_t alignment; /* 24 4 */
/* size: 32, cachelines: 1, members: 4 */
/* sum members: 24, holes: 1, sum holes: 4 */
/* padding: 4 */
/* last cacheline: 32 bytes */
};
to:
struct anv_image_memory_range {
enum anv_image_memory_binding binding; /* 0 4 */
uint32_t alignment; /* 4 4 */
uint64_t size; /* 8 8 */
uint64_t offset; /* 16 8 */
/* size: 24, cachelines: 1, members: 4 */
/* last cacheline: 24 bytes */
};
Considering we can have tens of thousands of anv_image structs
allocated at the same time on gaming workloads, this can save us a few
MB of memory. It ain't much but it's honest work.
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/28700>
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