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glsl/serialize: optimize for equal offsets in uniform remap tables

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Closes: https://gitlab.freedesktop.org/mesa/mesa/issues/1416

This decreases the shader cache size in the ticket from 1.6 MB to 40 KB.

Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>
This commit is contained in:
Marek Olšák 2019-10-24 23:26:57 -04:00
parent e90269d90a
commit 88e9042b6c
1 changed files with 28 additions and 2 deletions
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30
src/compiler/glsl/serialize.cpp
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@ -568,7 +568,8 @@ enum uniform_remap_type
{
remap_type_inactive_explicit_location,
remap_type_null_ptr,
remap_type_uniform_offset
remap_type_uniform_offset,
remap_type_uniform_offsets_equal,
};
static void
@ -581,15 +582,32 @@ write_uniform_remap_table(struct blob *metadata,
for (unsigned i = 0; i < num_entries; i++) {
gl_uniform_storage *entry = remap_table[i];
uint32_t offset = entry - uniform_storage;
if (entry == INACTIVE_UNIFORM_EXPLICIT_LOCATION) {
blob_write_uint32(metadata, remap_type_inactive_explicit_location);
} else if (entry == NULL) {
blob_write_uint32(metadata, remap_type_null_ptr);
} else if (i+1 < num_entries && entry == remap_table[i+1]) {
blob_write_uint32(metadata, remap_type_uniform_offsets_equal);
/* If many offsets are equal, write only one offset and the number
* of consecutive entries being equal.
*/
unsigned count = 1;
for (unsigned j = i + 1; j < num_entries; j++) {
if (entry != remap_table[j])
break;
count++;
}
blob_write_uint32(metadata, offset);
blob_write_uint32(metadata, count);
i += count - 1;
} else {
blob_write_uint32(metadata, remap_type_uniform_offset);
uint32_t offset = entry - uniform_storage;
blob_write_uint32(metadata, offset);
}
}
@ -634,6 +652,14 @@ read_uniform_remap_table(struct blob_reader *metadata,
remap_table[i] = INACTIVE_UNIFORM_EXPLICIT_LOCATION;
} else if (type == remap_type_null_ptr) {
remap_table[i] = NULL;
} else if (type == remap_type_uniform_offsets_equal) {
uint32_t uni_offset = blob_read_uint32(metadata);
uint32_t count = blob_read_uint32(metadata);
struct gl_uniform_storage *entry = uniform_storage + uni_offset;
for (unsigned j = 0; j < count; j++)
remap_table[i+j] = entry;
i += count - 1;
} else {
uint32_t uni_offset = blob_read_uint32(metadata);
remap_table[i] = uniform_storage + uni_offset;