I tried to run triangle.c on Intel Arc B580

[procedural]

I know, I know, dis GPU is weeeeeeird, but stay with me on this one! 😄😄

Here's what it printed when running the app:

ERROR (DeviceVK.hpp:161) - VK::Intel(R) Arc(TM) B580 Graphics - [4238086583] vkCreatePipelineLayout(): max per-stage acceleration structure bindings count (2048) exceeds device maxPerStageDescriptorUpdateAfterBindAccelerationStructures limit (16).
The Vulkan spec states: The total number of bindings with a descriptorType of VK_DESCRIPTOR_TYPE_ACCELERATION_STRUCTURE_KHR accessible to any given shader stage across all elements of pSetLayouts must be less than or equal to VkPhysicalDeviceAccelerationStructurePropertiesKHR::maxPerStageDescriptorUpdateAfterBindAccelerationStructures (https://docs.vulkan.org/spec/latest/chapters/descriptorsets.html#VUID-VkPipelineLayoutCreateInfo-descriptorType-03572)

I think this one is solvable, right? 😄

[procedural]

Yay, an sRGB-incorrect triangle is rendered successfully! 😄 Here's the patch that changes 2048 acc structs count to 16:

rafx_commit_6e9093e00_arc_b580_fix.patch

diff --git a/src/core.cc b/src/core.cc
index 8e99e22..f5dc10f 100644
--- a/src/core.cc
+++ b/src/core.cc
@@ -257,7 +257,7 @@ static void InitBindless() {
     poolDesc.storageStructuredBufferMaxNum = RFX_MAX_BINDLESS_TEXTURES;
     poolDesc.storageTextureMaxNum = RFX_MAX_BINDLESS_TEXTURES;
     poolDesc.samplerMaxNum = 4;
-    poolDesc.accelerationStructureMaxNum = hasRT ? 2048 : 0;
+    poolDesc.accelerationStructureMaxNum = hasRT ? 16 : 0;
     poolDesc.flags = nri::DescriptorPoolBits::ALLOW_UPDATE_AFTER_SET;
     NRI_CHECK(CORE.NRI.CreateDescriptorPool(*CORE.NRIDevice, poolDesc, CORE.Bindless.descriptorPool));
 
@@ -289,7 +289,7 @@ static void InitBindless() {
     uint32_t rangeCount = 5;
     if (hasRT) {
         // 5 = acceleration structures srv
-        ranges[5] = { isD3D12 ? (RFX_MAX_BINDLESS_TEXTURES * 2) : 5u, 2048, nri::DescriptorType::ACCELERATION_STRUCTURE,
+        ranges[5] = { isD3D12 ? (RFX_MAX_BINDLESS_TEXTURES * 2) : 5u, 16, nri::DescriptorType::ACCELERATION_STRUCTURE,
                       nri::StageBits::ALL, bindlessFlags };
         rangeCount = 6;
     }
diff --git a/src/graphics.cc b/src/graphics.cc
index 4fd87ea..5add52b 100644
--- a/src/graphics.cc
+++ b/src/graphics.cc
@@ -1948,7 +1948,7 @@ static const char* s_RafxSlangContent = R"(#ifndef RAFX_SLANG_H
     RWByteAddressBuffer g_RWBuffers[RFX_MAX_BINDLESS_TEXTURES] : register(u0, space1);
     RWTexture2D<float4> g_RWTextures[RFX_MAX_BINDLESS_TEXTURES] : register(u4096, space1);
 #ifdef RFX_RAY_TRACING_SUPPORTED
-    RaytracingAccelerationStructure g_AccelerationStructures[2048] : register(t8192, space1);
+    RaytracingAccelerationStructure g_AccelerationStructures[16] : register(t8192, space1);
 #endif
 
     #define RFX_PUSH_CONSTANTS(StructName, Name) \
@@ -1962,7 +1962,7 @@ static const char* s_RafxSlangContent = R"(#ifndef RAFX_SLANG_H
     [[vk::binding(3, 1)]] RWByteAddressBuffer g_RWBuffers[RFX_MAX_BINDLESS_TEXTURES];
     [[vk::binding(4, 1)]] RWTexture2D<float4> g_RWTextures[RFX_MAX_BINDLESS_TEXTURES];
 #ifdef RFX_RAY_TRACING_SUPPORTED
-    [[vk::binding(5, 1)]] RaytracingAccelerationStructure g_AccelerationStructures[2048];
+    [[vk::binding(5, 1)]] RaytracingAccelerationStructure g_AccelerationStructures[16];
 #endif
 
     #define RFX_PUSH_CONSTANTS(StructName, Name) \
@@ -2442,7 +2442,7 @@ static bool CreatePipelineLayoutFromImpl(RfxShaderImpl* impl, bool isD3D12, bool
 
     if (hasRT) {
         // 5 = AS
-        bindlessRanges[5] = { isD3D12 ? (RFX_MAX_BINDLESS_TEXTURES * 2) : 5u, 2048, nri::DescriptorType::ACCELERATION_STRUCTURE,
+        bindlessRanges[5] = { isD3D12 ? (RFX_MAX_BINDLESS_TEXTURES * 2) : 5u, 16, nri::DescriptorType::ACCELERATION_STRUCTURE,
                               nri::StageBits::ALL, bindlessFlags };
         bindlessRangeCount = 6;
     }