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tests: Add individual descriptor copy tests to descriptor benchmark. 

Signed-off-by: Hans-Kristian Arntzen <post@arntzen-software.no>
This commit is contained in:
Hans-Kristian Arntzen 2022-02-21 16:02:19 +01:00
parent 2278da339a
commit 719a38a5fe
1 changed files with 50 additions and 4 deletions
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54
tests/descriptor_performance.c
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@ -74,10 +74,38 @@ static void copy_descriptor_heap(ID3D12Device *device, ID3D12DescriptorHeap *gpu
D3D12_DESCRIPTOR_HEAP_TYPE_CBV_SRV_UAV);
}
static void zero_descriptor_heap(ID3D12Device *device, ID3D12DescriptorHeap *heap,
ID3D12Resource *resource, unsigned int count)
static void copy_descriptor_heap_single(ID3D12Device *device, ID3D12DescriptorHeap *gpu_heap,
ID3D12DescriptorHeap *cpu_heap, unsigned int count)
{
fill_descriptor_heap_srv(device, heap, resource, NULL, count);
D3D12_CPU_DESCRIPTOR_HANDLE gpu;
D3D12_CPU_DESCRIPTOR_HANDLE cpu;
UINT64 increment;
unsigned int i;
gpu = ID3D12DescriptorHeap_GetCPUDescriptorHandleForHeapStart(gpu_heap);
cpu = ID3D12DescriptorHeap_GetCPUDescriptorHandleForHeapStart(cpu_heap);
increment = ID3D12Device_GetDescriptorHandleIncrementSize(device, D3D12_DESCRIPTOR_HEAP_TYPE_CBV_SRV_UAV);
for (i = 0; i < count; i++)
{
ID3D12Device_CopyDescriptorsSimple(device, 1, gpu, cpu,
D3D12_DESCRIPTOR_HEAP_TYPE_CBV_SRV_UAV);
gpu.ptr += increment;
cpu.ptr += increment;
}
}
static void zero_descriptor_heap(ID3D12Device *device, ID3D12DescriptorHeap *heap, unsigned int count)
{
D3D12_SHADER_RESOURCE_VIEW_DESC srv_desc;
memset(&srv_desc, 0, sizeof(srv_desc));
srv_desc.ViewDimension = D3D12_SRV_DIMENSION_TEXTURE2D;
srv_desc.Format = DXGI_FORMAT_R8G8B8A8_UNORM;
srv_desc.Shader4ComponentMapping = D3D12_DEFAULT_SHADER_4_COMPONENT_MAPPING;
srv_desc.Texture2D.MipLevels = 1;
fill_descriptor_heap_srv(device, heap, NULL, &srv_desc, count);
}
static void do_benchmark_run(ID3D12Device *device)
@ -165,7 +193,7 @@ static void do_benchmark_run(ID3D12Device *device)
/* Create zero descriptors. */
{
start_time = get_time();
zero_descriptor_heap(device, gpu_heap, texture, 1000000);
zero_descriptor_heap(device, gpu_heap, 1000000);
end_time = get_time();
printf("Creating 1M null-SRVs took: %.3f ms.\n", 1e3 * (end_time - start_time));
}
@ -178,6 +206,24 @@ static void do_benchmark_run(ID3D12Device *device)
printf("Copying 1M SRVs to zeroed GPU visible heap took: %.3f ms.\n", 1e3 * (end_time - start_time));
}
/* Try copying descriptors one at a time on top of zero-initialized descriptor heap. */
{
start_time = get_time();
copy_descriptor_heap_single(device, gpu_heap, cpu_heap, 1000000);
end_time = get_time();
printf("Copying 1M individual SRVs to GPU visible heap (duplicates) took: %.3f ms.\n", 1e3 * (end_time - start_time));
}
/* Create zero descriptors. */
zero_descriptor_heap(device, gpu_heap, 1000000);
{
start_time = get_time();
copy_descriptor_heap_single(device, gpu_heap, cpu_heap, 1000000);
end_time = get_time();
printf("Copying 1M individual SRVs to zeroed GPU visible heap took: %.3f ms.\n", 1e3 * (end_time - start_time));
}
ID3D12Resource_Release(texture);
ID3D12DescriptorHeap_Release(cpu_heap);
ID3D12DescriptorHeap_Release(gpu_heap);