diff options
Diffstat (limited to 'src/amd/vulkan/radv_device.c')
| -rw-r--r-- | src/amd/vulkan/radv_device.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/src/amd/vulkan/radv_device.c b/src/amd/vulkan/radv_device.c index ad83f9f4eb1..da65511cf15 100644 --- a/src/amd/vulkan/radv_device.c +++ b/src/amd/vulkan/radv_device.c @@ -813,6 +813,28 @@ VkResult radv_CreateDevice( } } +#if HAVE_LLVM < 0x0400 + device->llvm_supports_spill = false; +#else + device->llvm_supports_spill = true; +#endif + + /* The maximum number of scratch waves. Scratch space isn't divided + * evenly between CUs. The number is only a function of the number of CUs. + * We can decrease the constant to decrease the scratch buffer size. + * + * sctx->scratch_waves must be >= the maximum posible size of + * 1 threadgroup, so that the hw doesn't hang from being unable + * to start any. + * + * The recommended value is 4 per CU at most. Higher numbers don't + * bring much benefit, but they still occupy chip resources (think + * async compute). I've seen ~2% performance difference between 4 and 32. + */ + uint32_t max_threads_per_block = 2048; + device->scratch_waves = MAX2(32 * physical_device->rad_info.num_good_compute_units, + max_threads_per_block / 64); + result = radv_device_init_meta(device); if (result != VK_SUCCESS) goto fail; |