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anv: Move push constant allocation to the command buffer

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Instead of blasting it out as part of the pipeline, we put it in the
command buffer and only blast it out when it's really needed.  Since the
PUSH_CONSTANT_ALLOC commands aren't pipelined, they immediately cause a
stall which we would like to avoid.

Signed-off-by: Jason Ekstrand <jason@jlekstrand.net>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
This commit is contained in:
Jason Ekstrand
2016-03-08 18:10:22 -08:00
parent 2cee0d0f9c
commit 5432487792
5 changed files with 71 additions and 44 deletions
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22
src/intel/vulkan/anv_pipeline.c
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@@ -940,28 +940,6 @@ anv_compute_urb_partition(struct anv_pipeline *pipeline)
pipeline->urb.start[MESA_SHADER_TESS_EVAL] = push_constant_chunks;
pipeline->urb.size[MESA_SHADER_TESS_EVAL] = 1;
pipeline->urb.entries[MESA_SHADER_TESS_EVAL] = 0;
const unsigned stages =
_mesa_bitcount(pipeline->active_stages & VK_SHADER_STAGE_ALL_GRAPHICS);
unsigned size_per_stage = stages ? (push_constant_kb / stages) : 0;
unsigned used_kb = 0;
/* Broadwell+ and Haswell gt3 require that the push constant sizes be in
* units of 2KB. Incidentally, these are the same platforms that have
* 32KB worth of push constant space.
*/
if (push_constant_kb == 32)
size_per_stage &= ~1u;
for (int i = MESA_SHADER_VERTEX; i < MESA_SHADER_FRAGMENT; i++) {
pipeline->urb.push_size[i] =
(pipeline->active_stages & (1 << i)) ? size_per_stage : 0;
used_kb += pipeline->urb.push_size[i];
assert(used_kb <= push_constant_kb);
}
pipeline->urb.push_size[MESA_SHADER_FRAGMENT] =
push_constant_kb - used_kb;
}
static void