Populate some Metal limits up from the backend
Bug: dawn:685 Change-Id: Idd36423e0f1f65c46ff835bfe90632b68505050c Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/64983 Reviewed-by: Corentin Wallez <cwallez@chromium.org> Commit-Queue: Austin Eng <enga@chromium.org>
This commit is contained in:
Austin Eng
Dawn LUCI CQ
parent
167d299916
commit
f45478d65e
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@ -21,6 +21,7 @@
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#include "common/SystemUtils.h"
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#include "dawn_native/Instance.h"
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#include "dawn_native/MetalBackend.h"
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#include "dawn_native/metal/BufferMTL.h"
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#include "dawn_native/metal/DeviceMTL.h"
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#if defined(DAWN_PLATFORM_MACOS)
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@ -321,8 +322,211 @@ namespace dawn_native { namespace metal {
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return {};
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}
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enum class MTLGPUFamily {
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Apple1,
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Apple2,
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Apple3,
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Apple4,
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Apple5,
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Apple6,
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Apple7,
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Mac1,
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Mac2,
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};
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ResultOrError<MTLGPUFamily> GetMTLGPUFamily() const {
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// https://developer.apple.com/documentation/metal/mtldevice/detecting_gpu_features_and_metal_software_versions?language=objc
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if (@available(macOS 10.15, iOS 10.13, *)) {
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if ([*mDevice supportsFamily:MTLGPUFamilyMac2]) {
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return MTLGPUFamily::Mac2;
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}
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if ([*mDevice supportsFamily:MTLGPUFamilyMac1]) {
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return MTLGPUFamily::Mac1;
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}
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if ([*mDevice supportsFamily:MTLGPUFamilyApple7]) {
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return MTLGPUFamily::Apple7;
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}
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if ([*mDevice supportsFamily:MTLGPUFamilyApple6]) {
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return MTLGPUFamily::Apple6;
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}
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if ([*mDevice supportsFamily:MTLGPUFamilyApple5]) {
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return MTLGPUFamily::Apple5;
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}
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if ([*mDevice supportsFamily:MTLGPUFamilyApple4]) {
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return MTLGPUFamily::Apple4;
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}
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if ([*mDevice supportsFamily:MTLGPUFamilyApple3]) {
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return MTLGPUFamily::Apple3;
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}
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if ([*mDevice supportsFamily:MTLGPUFamilyApple2]) {
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return MTLGPUFamily::Apple2;
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}
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if ([*mDevice supportsFamily:MTLGPUFamilyApple1]) {
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return MTLGPUFamily::Apple1;
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}
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}
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#if TARGET_OS_OSX
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if (@available(macOS 10.14, *)) {
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if ([*mDevice supportsFeatureSet:MTLFeatureSet_macOS_GPUFamily2_v1]) {
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return MTLGPUFamily::Mac2;
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}
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}
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if (@available(macOS 10.11, *)) {
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if ([*mDevice supportsFeatureSet:MTLFeatureSet_macOS_GPUFamily1_v1]) {
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return MTLGPUFamily::Mac1;
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}
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}
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#elif TARGET_OS_IOS
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if (@available(iOS 10.11, *)) {
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if ([*mDevice supportsFeatureSet:MTLFeatureSet_iOS_GPUFamily4_v1]) {
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return MTLGPUFamily::Apple4;
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}
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}
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if (@available(iOS 9.0, *)) {
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if ([*mDevice supportsFeatureSet:MTLFeatureSet_iOS_GPUFamily3_v1]) {
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return MTLGPUFamily::Apple3;
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}
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}
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if (@available(iOS 8.0, *)) {
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if ([*mDevice supportsFeatureSet:MTLFeatureSet_iOS_GPUFamily2_v1]) {
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return MTLGPUFamily::Apple2;
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}
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}
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if (@available(iOS 8.0, *)) {
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if ([*mDevice supportsFeatureSet:MTLFeatureSet_iOS_GPUFamily1_v1]) {
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return MTLGPUFamily::Apple1;
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}
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}
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#endif
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return DAWN_INTERNAL_ERROR("Unsupported Metal device");
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}
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MaybeError InitializeSupportedLimitsImpl(CombinedLimits* limits) override {
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struct MTLDeviceLimits {
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uint32_t maxVertexAttribsPerDescriptor;
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uint32_t maxBufferArgumentEntriesPerFunc;
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uint32_t maxTextureArgumentEntriesPerFunc;
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uint32_t maxSamplerStateArgumentEntriesPerFunc;
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uint32_t maxThreadsPerThreadgroup;
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uint32_t maxTotalThreadgroupMemory;
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uint32_t maxFragmentInputComponents;
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uint32_t max1DTextureSize;
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uint32_t max2DTextureSize;
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uint32_t max3DTextureSize;
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uint32_t maxTextureArrayLayers;
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uint32_t minBufferOffsetAlignment;
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};
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struct LimitsForFamily {
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uint32_t MTLDeviceLimits::*limit;
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ityp::array<MTLGPUFamily, uint32_t, 9> values;
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};
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// clang-format off
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// https://developer.apple.com/metal/Metal-Feature-Set-Tables.pdf
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// Apple Mac
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// 1, 2, 3, 4, 5, 6, 7, 1, 2
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constexpr LimitsForFamily kMTLLimits[12] = {
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{&MTLDeviceLimits::maxVertexAttribsPerDescriptor, { 31u, 31u, 31u, 31u, 31u, 31u, 31u, 31u, 31u }},
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{&MTLDeviceLimits::maxBufferArgumentEntriesPerFunc, { 31u, 31u, 31u, 31u, 31u, 31u, 31u, 31u, 31u }},
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{&MTLDeviceLimits::maxTextureArgumentEntriesPerFunc, { 31u, 31u, 31u, 96u, 96u, 128u, 128u, 128u, 128u }},
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{&MTLDeviceLimits::maxSamplerStateArgumentEntriesPerFunc, { 16u, 16u, 16u, 16u, 16u, 16u, 16u, 16u, 16u }},
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{&MTLDeviceLimits::maxThreadsPerThreadgroup, { 512u, 512u, 512u, 1024u, 1024u, 1024u, 1024u, 1024u, 1024u }},
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{&MTLDeviceLimits::maxTotalThreadgroupMemory, { 16352u, 16352u, 16384u, 32768u, 32768u, 32768u, 32768u, 32768u, 32768u }},
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{&MTLDeviceLimits::maxFragmentInputComponents, { 60u, 60u, 60u, 124u, 124u, 124u, 124u, 124u, 124u }},
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{&MTLDeviceLimits::max1DTextureSize, { 8192u, 8192u, 16384u, 16384u, 16384u, 16384u, 16384u, 16384u, 16384u }},
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{&MTLDeviceLimits::max2DTextureSize, { 8192u, 8192u, 16384u, 16384u, 16384u, 16384u, 16384u, 16384u, 16384u }},
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{&MTLDeviceLimits::max3DTextureSize, { 2048u, 2048u, 2048u, 2048u, 2048u, 2048u, 2048u, 2048u, 2048u }},
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{&MTLDeviceLimits::maxTextureArrayLayers, { 2048u, 2048u, 2048u, 2048u, 2048u, 2048u, 2048u, 2048u, 2048u }},
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{&MTLDeviceLimits::minBufferOffsetAlignment, { 4u, 4u, 4u, 4u, 4u, 4u, 4u, 256u, 256u }},
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};
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// clang-format on
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MTLGPUFamily mtlGPUFamily;
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DAWN_TRY_ASSIGN(mtlGPUFamily, GetMTLGPUFamily());
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MTLDeviceLimits mtlLimits;
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for (const auto& limitsForFamily : kMTLLimits) {
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mtlLimits.*limitsForFamily.limit = limitsForFamily.values[mtlGPUFamily];
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}
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GetDefaultLimits(&limits->v1);
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limits->v1.maxTextureDimension1D = mtlLimits.max1DTextureSize;
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limits->v1.maxTextureDimension2D = mtlLimits.max2DTextureSize;
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limits->v1.maxTextureDimension3D = mtlLimits.max3DTextureSize;
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limits->v1.maxTextureArrayLayers = mtlLimits.maxTextureArrayLayers;
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uint32_t maxBuffersPerStage = mtlLimits.maxBufferArgumentEntriesPerFunc;
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maxBuffersPerStage -= 1; // One slot is reserved to store buffer lengths.
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uint32_t baseMaxBuffersPerStage = limits->v1.maxStorageBuffersPerShaderStage +
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limits->v1.maxUniformBuffersPerShaderStage +
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limits->v1.maxVertexBuffers;
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ASSERT(maxBuffersPerStage >= baseMaxBuffersPerStage);
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{
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uint32_t additional = maxBuffersPerStage - baseMaxBuffersPerStage;
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limits->v1.maxStorageBuffersPerShaderStage += additional / 3;
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limits->v1.maxUniformBuffersPerShaderStage += additional / 3;
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limits->v1.maxVertexBuffers += (additional - 2 * (additional / 3));
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}
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uint32_t baseMaxTexturesPerStage = limits->v1.maxSampledTexturesPerShaderStage +
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limits->v1.maxStorageTexturesPerShaderStage;
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ASSERT(mtlLimits.maxTextureArgumentEntriesPerFunc >= baseMaxTexturesPerStage);
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{
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uint32_t additional =
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mtlLimits.maxTextureArgumentEntriesPerFunc - baseMaxTexturesPerStage;
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limits->v1.maxSampledTexturesPerShaderStage += additional / 2;
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limits->v1.maxStorageTexturesPerShaderStage += (additional - additional / 2);
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}
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limits->v1.maxSamplersPerShaderStage = mtlLimits.maxSamplerStateArgumentEntriesPerFunc;
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// Metal limits are per-function, so the layout limits are the same as the stage
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// limits. Note: this should likely change if the implementation uses Metal argument
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// buffers. Non-dynamic buffers will probably be bound argument buffers, but dynamic
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// buffers may be set directly.
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// Mac GPU families with tier 1 argument buffers support 64
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// buffers, 128 textures, and 16 samplers. Mac GPU families
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// with tier 2 argument buffers support 500000 buffers and
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// textures, and 1024 unique samplers
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limits->v1.maxDynamicUniformBuffersPerPipelineLayout =
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limits->v1.maxUniformBuffersPerShaderStage;
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limits->v1.maxDynamicStorageBuffersPerPipelineLayout =
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limits->v1.maxStorageBuffersPerShaderStage;
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// The WebGPU limit is the limit across all vertex buffers, combined.
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limits->v1.maxVertexAttributes =
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limits->v1.maxVertexBuffers * mtlLimits.maxVertexAttribsPerDescriptor;
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limits->v1.maxInterStageShaderComponents = mtlLimits.maxFragmentInputComponents;
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limits->v1.maxComputeWorkgroupStorageSize = mtlLimits.maxTotalThreadgroupMemory;
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limits->v1.maxComputeInvocationsPerWorkgroup = mtlLimits.maxThreadsPerThreadgroup;
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limits->v1.maxComputeWorkgroupSizeX = mtlLimits.maxThreadsPerThreadgroup;
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limits->v1.maxComputeWorkgroupSizeY = mtlLimits.maxThreadsPerThreadgroup;
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limits->v1.maxComputeWorkgroupSizeZ = mtlLimits.maxThreadsPerThreadgroup;
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limits->v1.minUniformBufferOffsetAlignment = mtlLimits.minBufferOffsetAlignment;
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limits->v1.minStorageBufferOffsetAlignment = mtlLimits.minBufferOffsetAlignment;
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uint64_t maxBufferSize = Buffer::QueryMaxBufferLength(*mDevice);
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// Metal has no documented limit on the size of a binding. Use the maximum
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// buffer size.
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limits->v1.maxUniformBufferBindingSize = maxBufferSize;
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limits->v1.maxStorageBufferBindingSize = maxBufferSize;
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// TODO(crbug.com/dawn/685):
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// LIMITS NOT SET:
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// - maxBindGroups
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// - maxVertexBufferArrayStride
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return {};
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}
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@ -360,7 +564,8 @@ namespace dawn_native { namespace metal {
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if (@available(iOS 8.0, *)) {
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supportedVersion = YES;
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// iOS only has a single device so MTLCopyAllDevices doesn't exist there.
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std::unique_ptr<Adapter> adapter = std::make_unique<Adapter>(GetInstance(), MTLCreateSystemDefaultDevice());
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std::unique_ptr<Adapter> adapter =
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std::make_unique<Adapter>(GetInstance(), MTLCreateSystemDefaultDevice());
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if (!GetInstance()->ConsumedError(adapter->Initialize())) {
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adapters.push_back(std::move(adapter));
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}
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@ -39,6 +39,8 @@ namespace dawn_native { namespace metal {
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void EnsureDataInitializedAsDestination(CommandRecordingContext* commandContext,
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const CopyTextureToBufferCmd* copy);
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static uint64_t QueryMaxBufferLength(id<MTLDevice> mtlDevice);
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private:
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using BufferBase::BufferBase;
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MaybeError Initialize(bool mappedAtCreation);
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@ -26,10 +26,6 @@ namespace dawn_native { namespace metal {
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// largest alignment of supported data types
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static constexpr uint32_t kMinUniformOrStorageBufferAlignment = 16u;
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// The maximum buffer size if querying the maximum buffer size or recommended working set size
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// is not available. This is a somewhat arbitrary limit of 1 GiB.
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static constexpr uint32_t kMaxBufferSizeFallback = 1024u * 1024u * 1024u;
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// static
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ResultOrError<Ref<Buffer>> Buffer::Create(Device* device, const BufferDescriptor* descriptor) {
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Ref<Buffer> buffer = AcquireRef(new Buffer(device, descriptor));
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@ -37,6 +33,32 @@ namespace dawn_native { namespace metal {
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return std::move(buffer);
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}
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// static
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uint64_t Buffer::QueryMaxBufferLength(id<MTLDevice> mtlDevice) {
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if (@available(iOS 12, tvOS 12, macOS 10.14, *)) {
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return [mtlDevice maxBufferLength];
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}
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// Earlier versions of Metal had maximums defined in the Metal feature set tables
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// https://metalbyexample.com/wp-content/uploads/Metal-Feature-Set-Tables-2018.pdf
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#if defined(DAWN_PLATFORM_MACOS)
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// 10.12 and 10.13 have a 1Gb limit.
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if (@available(macOS 10.12, *)) {
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// |maxBufferLength| isn't always available on older systems. If available, use
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// |recommendedMaxWorkingSetSize| instead. We can probably allocate more than this,
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// but don't have a way to discover a better limit. MoltenVK also uses this heuristic.
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return 1024 * 1024 * 1024;
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}
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// 10.11 has a 256Mb limit
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if (@available(maxOS 10.11, *)) {
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return 256 * 1024 * 1024;
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}
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#else
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// macOS / tvOS: 256Mb limit in versions without [MTLDevice maxBufferLength]
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return 256 * 1024 * 1024;
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#endif
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}
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MaybeError Buffer::Initialize(bool mappedAtCreation) {
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MTLResourceOptions storageMode;
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if (GetUsage() & kMappableBufferUsages) {
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@ -80,23 +102,8 @@ namespace dawn_native { namespace metal {
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}
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currentSize = Align(currentSize, alignment);
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if (@available(iOS 12, macOS 10.14, *)) {
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NSUInteger maxBufferSize = [ToBackend(GetDevice())->GetMTLDevice() maxBufferLength];
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if (currentSize > maxBufferSize) {
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return DAWN_OUT_OF_MEMORY_ERROR("Buffer allocation is too large");
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}
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#if defined(DAWN_PLATFORM_MACOS)
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} else if (@available(macOS 10.12, *)) {
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// |maxBufferLength| isn't always available on older systems. If available, use
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// |recommendedMaxWorkingSetSize| instead. We can probably allocate more than this,
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// but don't have a way to discover a better limit. MoltenVK also uses this heuristic.
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uint64_t maxWorkingSetSize =
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[ToBackend(GetDevice())->GetMTLDevice() recommendedMaxWorkingSetSize];
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if (currentSize > maxWorkingSetSize) {
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return DAWN_OUT_OF_MEMORY_ERROR("Buffer allocation is too large");
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}
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#endif
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} else if (currentSize > kMaxBufferSizeFallback) {
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uint64_t maxBufferSize = QueryMaxBufferLength(ToBackend(GetDevice())->GetMTLDevice());
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if (currentSize > maxBufferSize) {
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return DAWN_OUT_OF_MEMORY_ERROR("Buffer allocation is too large");
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}
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