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llama.cpp
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HIP: enable WMMA-MMQ INT kernels for RDNA 3 (#17576) 

* enabled wmma instructions for most quantizations other than q2k

* fixed the last q2_k test case failure

* address comments: fix out of bound write for RDNA4, add comments after #endif

* clean up rebase: fix ne error in half2

* fix the EditorConfig CI
This commit is contained in:
Jiacheng (Jason) Chen 2025-12-05 03:17:37 -05:00 committed by GitHub
parent 03d9a77b85
commit 668ed76574
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GPG Key ID: B5690EEEBB952194
4 changed files with 94 additions and 29 deletions
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4
ggml/src/ggml-cuda/common.cuh
View File

@ -226,7 +226,7 @@ static const char * cu_get_error_str(CUresult err) {
#define AMD_MFMA_AVAILABLE
#endif // defined(GGML_USE_HIP) && defined(CDNA) && !defined(GGML_HIP_NO_MMQ_MFMA)
#if defined(GGML_USE_HIP) && defined(RDNA4)
#if defined(GGML_USE_HIP) && (defined(RDNA4) || defined(RDNA3))
#define AMD_WMMA_AVAILABLE
#endif // defined(GGML_USE_HIP) && defined(RDNA4)
@ -294,7 +294,7 @@ static bool amd_mfma_available(const int cc) {
}
static bool amd_wmma_available(const int cc) {
return GGML_CUDA_CC_IS_RDNA4(cc);
return (GGML_CUDA_CC_IS_RDNA4(cc) || GGML_CUDA_CC_IS_RDNA3(cc));
}
static bool volta_mma_available(const int cc) {

86
ggml/src/ggml-cuda/mma.cuh
View File

@ -173,6 +173,9 @@ namespace ggml_cuda_mma {
#elif defined(AMD_WMMA_AVAILABLE)
#if defined(RDNA4)
static constexpr int ne = I * J / 32;
#elif defined(RDNA3)
static constexpr int ne = (I == 16 && J == 16) ? I * J / 32 : I * J / 16;
#endif // defined(RDNA4)
T x[ne] = {0};
static constexpr __device__ bool supported() {
@ -182,7 +185,11 @@ namespace ggml_cuda_mma {
static __device__ __forceinline__ int get_i(const int l) {
if constexpr (I == 16 && J == 16) {
#if defined(RDNA4)
return 8 * (threadIdx.x / 16) + l;
#elif defined(RDNA3)
return 2 * l + (threadIdx.x / 16);
#endif // defined(RDNA4)
} else {
NO_DEVICE_CODE;
return -1;
@ -197,7 +204,6 @@ namespace ggml_cuda_mma {
return -1;
}
}
#endif
#else
static constexpr int ne = I * J / 32;
T x[ne] = {0};
@ -284,6 +290,7 @@ namespace ggml_cuda_mma {
}
}
#elif defined(AMD_WMMA_AVAILABLE)
static constexpr int ne = I * J / 32;
half2 x[ne] = {{0.0f, 0.0f}};
@ -544,16 +551,32 @@ namespace ggml_cuda_mma {
} else if constexpr (std::is_same_v<T, int>) {
if constexpr (I == 16 && J == 4) {
int64_t * xi = (int64_t *) t.x;
#if defined(RDNA4)
const int64_t * xs = (int64_t *) ((const int *) xs0 + (threadIdx.x % t.I) * stride + 2 * (threadIdx.x / t.I));
xi[0] = xs[0];
#elif defined(RDNA3)
static_assert(tile<I,J,T>::ne >= 4, "fragment too small");
const int64_t * xs = (int64_t *) ((const int *) xs0 + (threadIdx.x % t.I) * stride);
xi[0] = xs[0];
xi[1] = xs[1];
#endif // defined(RDNA4)
}else if constexpr (I == 16 && J == 8) {
int64_t * xi = (int64_t *) t.x;
#if defined(RDNA4)
const int64_t * xs = (int64_t *) ((const int *) xs0 + (threadIdx.x % t.I) * stride + 4 * (threadIdx.x / t.I));
xi[0] = xs[0];
const int64_t * xs1 = (int64_t *) ((const int *) xs0 + (threadIdx.x % t.I) * stride + 4 * (threadIdx.x / t.I) + 2);
xi[1] = xs1[0];
#elif defined(RDNA3)
static_assert(tile<I,J,T>::ne >= 8, "fragment too small");
const int64_t * xs = (int64_t *) ((const int *) xs0 + (threadIdx.x % t.I) * stride);
// contiguous four 64-bit chunks per lane for the wider RDNA3 fragment
xi[0] = xs[0];
xi[1] = xs[1];
const int64_t * xs1 = xs + 2;
xi[2] = xs1[0];
xi[3] = xs1[1];
}else{
NO_DEVICE_CODE;
@ -561,6 +584,7 @@ namespace ggml_cuda_mma {
} else {
NO_DEVICE_CODE;
}
#endif // defined(RDNA4)
#else
#pragma unroll
for (int l = 0; l < t.ne; ++l) {
@ -858,12 +882,14 @@ namespace ggml_cuda_mma {
: "r"(Axi[2]), "r"(Axi[3]), "r"(Bxi[3]));
#endif // __CUDA_ARCH__ >= GGML_CUDA_CC_AMPERE
#elif defined(AMD_WMMA_AVAILABLE)
#if defined(RDNA4)
using halfx8_t = __attribute__((ext_vector_type(8))) _Float16;
using floatx8_t = __attribute__((ext_vector_type(8))) float;
floatx8_t& acc_frag = reinterpret_cast<floatx8_t&>(D.x[0]);
const halfx8_t& a_frag = reinterpret_cast<const halfx8_t&>(A.x[0]);
const halfx8_t& b_frag = reinterpret_cast<const halfx8_t&>(B.x[0]);
acc_frag = __builtin_amdgcn_wmma_f32_16x16x16_f16_w32_gfx12(a_frag, b_frag, acc_frag);
#endif // RDNA4
#else
GGML_UNUSED_VARS(D, A, B);
NO_DEVICE_CODE;
@ -873,12 +899,14 @@ namespace ggml_cuda_mma {
static __device__ __forceinline__ void mma(
tile<16, 16, float> & D, const tile<16, 8, nv_bfloat162> & A, const tile<16, 8, nv_bfloat162> & B) {
#if defined(AMD_WMMA_AVAILABLE)
#if defined(RDNA4)
using bf16x8_t = __attribute__((ext_vector_type(8))) __bf16;
using floatx8_t = __attribute__((ext_vector_type(8))) float;
floatx8_t& acc_frag = reinterpret_cast<floatx8_t&>(D.x[0]);
const bf16x8_t& a_frag = reinterpret_cast<const bf16x8_t&>(A.x[0]);
const bf16x8_t& b_frag = reinterpret_cast<const bf16x8_t&>(B.x[0]);
acc_frag = __builtin_amdgcn_wmma_f32_16x16x16_bf16_w32_gfx12(a_frag, b_frag, acc_frag);
#endif // RDNA4
#else
GGML_UNUSED_VARS(D, A, B);
NO_DEVICE_CODE;
@ -907,14 +935,14 @@ namespace ggml_cuda_mma {
#endif // defined(CDNA3)
#elif defined(AMD_WMMA_AVAILABLE)
using int32x2_t = __attribute__((__vector_size__(2 * sizeof(int)))) int;
int32x2_t * a_vec = (int32x2_t *) A.x;
int32x2_t * b_vec = (int32x2_t *) B.x;
using int32x8_t = __attribute__((__vector_size__(8 * sizeof(int)))) int;
int32x8_t * acc = (int32x8_t *) D.x;
#if defined(RDNA4)
using int32x2_t = __attribute__((__vector_size__(2 * sizeof(int)))) int;
int32x2_t * a_vec = (int32x2_t *) A.x;
int32x2_t * b_vec = (int32x2_t *) B.x;
acc[0] = __builtin_amdgcn_wmma_i32_16x16x16_iu8_w32_gfx12(
true,
@ -933,7 +961,30 @@ namespace ggml_cuda_mma {
acc[0],
true
);
#endif // defined(RDNA4)
#elif defined(RDNA3)
using int32x4_t = __attribute__((__vector_size__(4 * sizeof(int)))) int;
int32x4_t * a_vec = (int32x4_t *) A.x;
int32x4_t * b_vec = (int32x4_t *) B.x;
acc[0] = __builtin_amdgcn_wmma_i32_16x16x16_iu8_w32(
true,
a_vec[0],
true,
b_vec[0],
acc[0],
true
);
acc[0] = __builtin_amdgcn_wmma_i32_16x16x16_iu8_w32(
true,
a_vec[1],
true,
b_vec[1],
acc[0],
true
);
#endif // RDNA4
#else
GGML_UNUSED_VARS(D, A, B);
@ -1020,13 +1071,13 @@ namespace ggml_cuda_mma {
static __device__ __forceinline__ void mma(
tile<16, 16, int> & D, const tile<16, 4, int> & A, const tile<16, 4, int> & B) {
#if defined(AMD_WMMA_AVAILABLE)
using int32x8_t = __attribute__((__vector_size__(8 * sizeof(int)))) int;
int32x8_t * acc = (int32x8_t *) D.x;
#if defined(RDNA4)
using int32x2_t = __attribute__((__vector_size__(2 * sizeof(int)))) int;
int32x2_t * a_vec = (int32x2_t *) A.x;
int32x2_t * b_vec = (int32x2_t *) B.x;
using int32x8_t = __attribute__((__vector_size__(8 * sizeof(int)))) int;
int32x8_t * acc = (int32x8_t *) D.x;
acc[0] = __builtin_amdgcn_wmma_i32_16x16x16_iu8_w32_gfx12(
true,
a_vec[0],
@ -1035,12 +1086,25 @@ static __device__ __forceinline__ void mma(
acc[0],
false
);
#elif defined(RDNA3)
using int32x4_t = __attribute__((__vector_size__(4 * sizeof(int)))) int;
int32x4_t * a_vec = (int32x4_t *) A.x;
int32x4_t * b_vec = (int32x4_t *) B.x;
acc[0] = __builtin_amdgcn_wmma_i32_16x16x16_iu8_w32(
true,
a_vec[0],
true,
b_vec[0],
acc[0],
false
);
#endif // RDNA4
#else
GGML_UNUSED(D);
GGML_UNUSED(A);
GGML_UNUSED(B);
NO_DEVICE_CODE;
#endif
#endif // AMD_WMMA_AVAILABLE
}
}

5
ggml/src/ggml-cuda/mmq.cu
View File

@ -307,10 +307,9 @@ bool ggml_cuda_should_use_mmq(enum ggml_type type, int cc, int64_t ne11) {
}
if (amd_wmma_available(cc)) {
if (GGML_CUDA_CC_IS_RDNA4(cc)) {
return true;
}
}
return (!GGML_CUDA_CC_IS_RDNA3(cc) && !GGML_CUDA_CC_IS_CDNA(cc)) || ne11 < MMQ_DP4A_MAX_BATCH_SIZE;
return (!GGML_CUDA_CC_IS_CDNA(cc)) || ne11 < MMQ_DP4A_MAX_BATCH_SIZE;
}

6
ggml/src/ggml-cuda/mmq.cuh
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@ -1542,8 +1542,10 @@ static __device__ __forceinline__ void vec_dot_q2_K_q8_1_mma(
tile_C Cm;
if (k01 >= MMQ_TILE_NE_K * 3/4) {
tile_A A1;
A1.x[0] = 0x01010101;
A1.x[1] = 0x01010101;
#pragma unroll
for (int l = 0; l < tile_A::ne; ++l) {
A1.x[l] = 0x01010101;
}
mma(Cm, A1, B);
}