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anv: allocator: correct scratch space for haswell

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commit 2213ffdb4b
Author: Kenneth Graunke <kenneth@whitecape.org>
Date:   Mon Jun 6 21:37:34 2016 -0700

    i965: Allocate scratch space for the maximum number of compute threads.

Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
This commit is contained in:
Lionel Landwerlin 2016-09-07 17:32:49 +01:00
parent 09394ee6cf
commit f2d43b44d7
1 changed files with 21 additions and 1 deletions
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22
src/intel/vulkan/anv_allocator.c
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@ -926,13 +926,33 @@ anv_scratch_pool_alloc(struct anv_device *device, struct anv_scratch_pool *pool,
struct anv_physical_device *physical_device =
&device->instance->physicalDevice;
/* WaCSScratchSize:hsw
*
* Haswell's scratch space address calculation appears to be sparse
* rather than tightly packed. The Thread ID has bits indicating which
* subslice, EU within a subslice, and thread within an EU it is.
* There's a maximum of two slices and two subslices, so these can be
* stored with a single bit. Even though there are only 10 EUs per
* subslice, this is stored in 4 bits, so there's an effective maximum
* value of 16 EUs. Similarly, although there are only 7 threads per EU,
* this is stored in a 3 bit number, giving an effective maximum value
* of 8 threads per EU.
*
* This means that we need to use 16 * 8 instead of 10 * 7 for the
* number of threads per subslice.
*/
const unsigned subslices = MAX2(physical_device->subslice_total, 1);
const unsigned scratch_ids_per_subslice =
device->info.is_haswell ? 16 * 8 : physical_device->max_cs_threads;
uint32_t max_threads[] = {
[MESA_SHADER_VERTEX] = physical_device->max_vs_threads,
[MESA_SHADER_TESS_CTRL] = physical_device->max_hs_threads,
[MESA_SHADER_TESS_EVAL] = physical_device->max_ds_threads,
[MESA_SHADER_GEOMETRY] = physical_device->max_gs_threads,
[MESA_SHADER_FRAGMENT] = physical_device->max_wm_threads,
[MESA_SHADER_COMPUTE] = physical_device->max_cs_threads,
[MESA_SHADER_COMPUTE] = scratch_ids_per_subslice * subslices,
};
size = per_thread_scratch * max_threads[stage];