Added Int4 mixed batch gemm support (#1839)

* remove redundant kernels.

* added batched_gemm_xdl_fp16int4_b_scale_v3

* Enabled the split K.

* added the batched_gemm_b_scale ckProfiler, meet function issue

* fix some typo

* fix ckProfiler build issue

* fix some bugs

* updated some debug info

* comment some code

* Fix

* fixed some bugs and refactor the code

* fixed a function bug.

* formatted files.

* formatted

* uncommented the ckProfiler CMakeLists

* fixed.

* fix ckProfiler for batched_gemm_b_scale

---------
Co-authored-by: mtgu0705 <mtgu@amd.com>
Co-authored-by: aska-0096 <haocwang@amd.com>
Co-authored-by: Bartlomiej Kocot <barkocot@amd.com>

example/24_batched_gemm/CMakeLists.txt

@@ -22,3 +22,6 @@ if(USE_BITINT_EXTENSION_INT4)
     add_example_executable(example_batched_gemm_xdl_int4 batched_gemm_xdl_int4.cpp)
     add_example_dependencies(example_batched_gemm_xdl example_batched_gemm_xdl_int4)
 endif()
+
+add_example_executable(example_batched_gemm_xdl_fp16int4_b_scale_v3 batched_gemm_xdl_fp16int4_b_scale_v3.cpp)
+add_example_dependencies(example_batched_gemm_xdl example_batched_gemm_xdl_fp16int4_b_scale_v3)

example/24_batched_gemm/batched_gemm_xdl_fp16int4_b_scale_v3.cpp

+#include <cstdlib>
+#include <initializer_list>
+#include <iostream>
+#include <numeric>
+
+#include "ck/ck.hpp"
+#include "ck/tensor_operation/gpu/device/gemm_specialization.hpp"
+#include "ck/tensor_operation/gpu/device/impl/device_batched_gemm_xdl_fpAintB_b_scale.hpp"
+#include "ck/tensor_operation/gpu/device/tensor_layout.hpp"
+#include "ck/tensor_operation/gpu/element/element_wise_operation.hpp"
+
+#include "ck/library/reference_tensor_operation/cpu/reference_batched_gemm.hpp"
+#include "ck/library/utility/check_err.hpp"
+#include "ck/library/utility/device_memory.hpp"
+#include "ck/library/utility/host_tensor.hpp"
+#include "ck/library/utility/host_tensor_generator.hpp"
+#include "ck/library/utility/literals.hpp"
+
+template <ck::index_t... Is>
+using S = ck::Sequence<Is...>;
+
+using F16 = ck::half_t;
+using F32 = float;
+
+using Row = ck::tensor_layout::gemm::RowMajor;
+using Col = ck::tensor_layout::gemm::ColumnMajor;
+
+using PassThrough = ck::tensor_operation::element_wise::PassThrough;
+
+using ADataType        = F16;
+using BDataType        = ck::pk_i4_t;
+using BScaleDataType   = ck::half_t;
+using AccDataType      = F32;
+using CShuffleDataType = F16;
+using CDataType        = F16;
+
+using ALayout = Row;
+using BLayout = Col;
+using CLayout = Row;
+
+using AElementOp = PassThrough;
+using BElementOp = PassThrough;
+using CElementOp = PassThrough;
+
+static constexpr auto GemmDefault = ck::tensor_operation::device::GemmSpecialization::Default;
+static constexpr auto PermuteA    = false;
+static constexpr bool PermuteB    = false;
+
+static constexpr ck::index_t Scale_Block_N = 1;
+static constexpr ck::index_t Scale_Block_K = 128;
+
+static constexpr ck::index_t KPerBlock = 256;
+
+// clang-format off
+using DeviceBatchedGemmV2Instance = 
+    ck::tensor_operation::device::DeviceBatchedGemm_Xdl_CShuffleV3_BScale<  
+        ALayout,   BLayout,  CLayout,   
+        ADataType, BDataType, BScaleDataType, CDataType, AccDataType, CShuffleDataType, 
+        AElementOp, BElementOp, CElementOp, GemmDefault, 
+        256, Scale_Block_N, Scale_Block_K,
+        16, 64,
+        KPerBlock, 8, 32,
+        16,   16,
+        1,    1,
+        S<32, 8, 1>,  S<1, 0, 2>,  S<1, 0, 2>,
+        2, 8, 8, 0,
+        S<8, 32, 1>,  S<1, 0, 2>,  S<1, 0, 2>,
+        2, 32, 32, 0,
+        1, 1, S<1, 16, 1, 8>, 8,
+        ck::BlockGemmPipelineScheduler::Intrawave, ck::BlockGemmPipelineVersion::v3, CDataType, CDataType, PermuteA, PermuteB>;
+// clang-format on
+
+using ReferenceBatchedGemmInstance = ck::tensor_operation::host::ReferenceBatchedGemm<ADataType,
+                                                                                      AccDataType,
+                                                                                      CDataType,
+                                                                                      AccDataType,
+                                                                                      AElementOp,
+                                                                                      BElementOp,
+                                                                                      CElementOp>;
+#include "run_batched_gemm_example_fp16int4_b_scale.inc"
+
+int main(int argc, char* argv[]) { return !run_batched_gemm_fp16_int4_b_scale_example(argc, argv); }

example/24_batched_gemm/run_batched_gemm_example_fp16int4_b_scale.inc

+// SPDX-License-Identifier: MIT
+// Copyright (c) 2025, Advanced Micro Devices, Inc. All rights reserved.
+#include <random>
+
+#pragma once
+struct ProblemSize final
+{
+    ck::index_t M = 128;
+    ck::index_t N = 128;
+    ck::index_t K = 384;
+
+    ck::index_t stride_A = K;
+    ck::index_t stride_B = K;
+    ck::index_t stride_C = N;
+
+    ck::index_t batch_stride_A = M * K;
+    ck::index_t batch_stride_B = K * N;
+    ck::index_t batch_stride_C = M * N;
+
+    // Batched Gemm count
+    ck::index_t batch_count = 2;
+
+    // Split K count
+    ck::index_t KBatch = 1;
+};
+
+struct ExecutionConfig final
+{
+    bool do_verification = true;
+    int init_method      = 1;
+    bool time_kernel     = true;
+};
+
+template <typename DataType>
+inline __host__ __device__ constexpr double get_rtol()
+{
+    if constexpr(std::is_same_v<DataType, float>)
+    {
+        return 1e-3;
+    }
+    else if constexpr(std::is_same_v<DataType, double>)
+    {
+        return 1e-6;
+    }
+    else if constexpr(std::is_same_v<DataType, ck::half_t>)
+    {
+        return 1e-3;
+    }
+    else if constexpr(std::is_same_v<DataType, ck::bhalf_t>)
+    {
+        return 5e-2;
+    }
+    else if constexpr(std::is_same_v<DataType, int32_t>)
+    {
+        return 1e-1;
+    }
+    else if constexpr(std::is_same_v<DataType, int8_t>)
+    {
+        return 1e-1;
+    }
+    else if constexpr(std::is_same_v<DataType, ck::f8_t>)
+    {
+        return 1e-1; // 240 and 224 are acceptable
+    }
+    else if constexpr(std::is_same_v<DataType, ck::bf8_t>)
+    {
+        return 1.5e-1; // 57344 and 49152 are acceptable
+    }
+    else
+    {
+        return 1e-3;
+    }
+}
+
+template <typename DataType>
+inline __host__ __device__ constexpr double get_atol()
+{
+    if constexpr(std::is_same_v<DataType, float>)
+    {
+        return 1e-3;
+    }
+    else if constexpr(std::is_same_v<DataType, double>)
+    {
+        return 1e-6;
+    }
+    else if constexpr(std::is_same_v<DataType, ck::half_t>)
+    {
+        return 1e-3;
+    }
+    else if constexpr(std::is_same_v<DataType, ck::bhalf_t>)
+    {
+        return 5e-2;
+    }
+    else if constexpr(std::is_same_v<DataType, int32_t>)
+    {
+        return 1e-1;
+    }
+    else if constexpr(std::is_same_v<DataType, int8_t>)
+    {
+        return 1e-1;
+    }
+    else if constexpr(std::is_same_v<DataType, ck::f8_t>)
+    {
+        return 16.1; // 240 and 224 are acceptable
+    }
+    else if constexpr(std::is_same_v<DataType, ck::bf8_t>)
+    {
+        return 8192.1; // 57344 and 49152 are acceptable
+    }
+    else
+    {
+        return 1e-3;
+    }
+}
+
+bool run_batched_gemm(const ProblemSize& problem_size, const ExecutionConfig& config)
+{
+    using namespace ck::literals;
+
+    auto& [M,
+           N,
+           K,
+           stride_A,
+           stride_B,
+           stride_C,
+           batch_stride_A,
+           batch_stride_B,
+           batch_stride_C,
+           batch_count,
+           KBatch] = problem_size;
+
+    auto f_host_tensor_descriptor = [](std::size_t batch_count_,
+                                       std::size_t row,
+                                       std::size_t col,
+                                       std::size_t stride,
+                                       std::size_t batch_stride,
+                                       auto layout) {
+        if constexpr(std::is_same_v<decltype(layout), ck::tensor_layout::gemm::RowMajor>)
+        {
+            return HostTensorDescriptor({batch_count_, row, col}, {batch_stride, stride, 1_uz});
+        }
+        else
+        {
+            return HostTensorDescriptor({batch_count_, row, col}, {batch_stride, 1_uz, stride});
+        }
+    };
+
+    ck::index_t Scale_Stride_BN = (K + Scale_Block_K - 1) / Scale_Block_K;
+    ck::index_t batch_BScale_Stride =
+        ((K + Scale_Block_K - 1) / Scale_Block_K) * ((N + Scale_Block_N - 1) / Scale_Block_N);
+
+    Tensor<ADataType> a_g_m_k(
+        f_host_tensor_descriptor(batch_count, M, K, stride_A, batch_stride_A, ALayout{}));
+    Tensor<BDataType> b_g_k_n(
+        f_host_tensor_descriptor(batch_count, K, N, stride_B, batch_stride_B, BLayout{}));
+    Tensor<BDataType> b_g_k_n_permute(
+        f_host_tensor_descriptor(batch_count, K, N, stride_B, batch_stride_B, BLayout{}));
+    Tensor<BScaleDataType> b1_g_k_n(
+        f_host_tensor_descriptor(batch_count,
+                                 (K + Scale_Block_K - 1) / Scale_Block_K,
+                                 (N + Scale_Block_N - 1) / Scale_Block_N,
+                                 Scale_Stride_BN,
+                                 batch_BScale_Stride,
+                                 BLayout{}));
+
+    switch(config.init_method)
+    {
+    case 0:
+        a_g_m_k.GenerateTensorValue(GeneratorTensor_1<ADataType>{1});
+        b_g_k_n.GenerateTensorValue(GeneratorTensor_1<BDataType>{1});
+        b1_g_k_n.GenerateTensorValue(GeneratorTensor_1<BScaleDataType>{1});
+        break;
+    case 1:
+        a_g_m_k.GenerateTensorValue(GeneratorTensor_2<ADataType>{-2, 2});
+        b_g_k_n.GenerateTensorValue(GeneratorTensor_2<BDataType>{-2, 2});
+        b1_g_k_n.GenerateTensorValue(GeneratorTensor_3<BScaleDataType>{0, 1.0});
+        break;
+    case 2:
+        a_g_m_k.GenerateTensorValue(GeneratorTensor_1<ADataType>{1});
+        b_g_k_n.GenerateTensorValue(GeneratorTensor_2<BDataType>{-2, 2});
+        b1_g_k_n.GenerateTensorValue(GeneratorTensor_1<BScaleDataType>{1});
+        break;
+    case 3:
+        a_g_m_k.GenerateTensorValue(GeneratorTensor_2<ADataType>{-2, 2});
+        b_g_k_n.GenerateTensorValue(GeneratorTensor_1<BDataType>{1});
+        b1_g_k_n.GenerateTensorValue(GeneratorTensor_1<BScaleDataType>{1});
+        break;
+    case 4:
+        a_g_m_k.GenerateTensorValue(GeneratorTensor_1<ADataType>{1});
+        b_g_k_n.GenerateTensorValue(GeneratorTensor_1<BDataType>{1});
+        b1_g_k_n.GenerateTensorValue(GeneratorTensor_3<BScaleDataType>{0, 1.0});
+        break;
+    case 5:
+        a_g_m_k.GenerateTensorValue(GeneratorTensor_2<ADataType>{-2, 2});
+        b_g_k_n.GenerateTensorValue(GeneratorTensor_2<BDataType>{-2, 2});
+        b1_g_k_n.GenerateTensorValue(GeneratorTensor_1<BScaleDataType>{1});
+        break;
+    default:
+        a_g_m_k.GenerateTensorValue(GeneratorTensor_3<ADataType>{0.5, 0.5});
+        b_g_k_n.GenerateTensorValue(GeneratorTensor_2<BDataType>{-2, 2});
+        b1_g_k_n.GenerateTensorValue(GeneratorTensor_3<BScaleDataType>{0, 1.0});
+    }
+
+    Tensor<CDataType> c_g_m_n_host_result(
+        f_host_tensor_descriptor(batch_count, M, N, stride_C, batch_stride_C, CLayout{}));
+    Tensor<CDataType> c_g_m_n_device_result(
+        f_host_tensor_descriptor(batch_count, M, N, stride_C, batch_stride_C, CLayout{}));
+
+    std::cout << "a_g_m_k: " << a_g_m_k.mDesc << std::endl;
+    std::cout << "b_g_k_n: " << b_g_k_n.mDesc << std::endl;
+    std::cout << "b1_g_k_n: " << b1_g_k_n.mDesc << std::endl;
+    std::cout << "c_g_m_n: " << c_g_m_n_host_result.mDesc << std::endl;
+
+    DeviceMem a_g_m_k_device_buf(sizeof(ADataType) * a_g_m_k.mDesc.GetElementSpaceSize());
+    DeviceMem b_g_k_n_device_buf(sizeof(BDataType) * b_g_k_n_permute.mDesc.GetElementSpaceSize());
+    DeviceMem b1_g_scale_device_buf(sizeof(BScaleDataType) * b1_g_k_n.mDesc.GetElementSpaceSize());
+    DeviceMem c_g_m_n_device_buf(sizeof(CDataType) *
+                                 c_g_m_n_device_result.mDesc.GetElementSpaceSize());
+
+    printf("a_g_m_k size: %zu, b_g_k_n size: %zu, b1_g_k_n size: %zu, c_g_m_n size: %zu\n",
+           a_g_m_k.mDesc.GetElementSpaceSize(),
+           b_g_k_n_permute.mDesc.GetElementSpaceSize(),
+           b1_g_k_n.mDesc.GetElementSpaceSize(),
+           c_g_m_n_device_result.mDesc.GetElementSpaceSize());
+
+    // weight permute
+    if constexpr(PermuteB)
+    {
+        printf("Permute B\n");
+        int K1 = KPerBlock;
+        int K0 = K / KPerBlock;
+
+        // int K0, N, K1
+        for(int bs = 0; bs < batch_count; bs++)
+        {
+            for(int j = 0; j < K0; j++)
+            {
+                for(int i = 0; i < N; i++)
+                {
+                    for(int jj = 0; jj < K1; jj++)
+                    {
+                        b_g_k_n_permute(bs * batch_stride_B + j * N * K1 + i * K1 + jj) =
+                            b_g_k_n(bs * batch_stride_B + i * K + (j * K1 + jj));
+                    }
+                }
+            }
+        }
+    }
+    else
+    {
+        b_g_k_n_permute = b_g_k_n;
+    }
+
+    // vector pk_i4x4 permute
+    for(int bs = 0; bs < batch_count; bs++)
+    {
+        for(int i = 0; i < N; i++)
+        {
+            for(int j = 0; j < K; j += 8)
+            {
+                int input[8];
+
+                for(int k = 0; k < 4; k++)
+                {
+                    int i4x2         = b_g_k_n_permute(bs, j + k * 2, i).data;
+                    input[k * 2 + 0] = (i4x2 >> 4) & 0xf;
+                    input[k * 2 + 1] = (i4x2 >> 0) & 0xf;
+                }
+
+                // permute 01234567->20643175
+                {
+                    int hi   = input[2];
+                    int lo   = input[0];
+                    int i4x2 = (hi << 4) | lo;
+
+                    b_g_k_n_permute(bs, j + 0, i) = i4x2;
+                }
+
+                {
+                    int hi   = input[6];
+                    int lo   = input[4];
+                    int i4x2 = (hi << 4) | lo;
+
+                    b_g_k_n_permute(bs, j + 2, i) = i4x2;
+                }
+
+                {
+                    int hi   = input[3];
+                    int lo   = input[1];
+                    int i4x2 = (hi << 4) | lo;
+
+                    b_g_k_n_permute(bs, j + 4, i) = i4x2;
+                }
+
+                {
+                    int hi   = input[7];
+                    int lo   = input[5];
+                    int i4x2 = (hi << 4) | lo;
+
+                    b_g_k_n_permute(bs, j + 6, i) = i4x2;
+                }
+            }
+        }
+    }
+
+    a_g_m_k_device_buf.ToDevice(a_g_m_k.mData.data());
+    b_g_k_n_device_buf.ToDevice(b_g_k_n_permute.mData.data());
+    b1_g_scale_device_buf.ToDevice(b1_g_k_n.mData.data());
+    DeviceMem workspace;
+
+    auto a_element_op = AElementOp{};
+    auto b_element_op = BElementOp{};
+    auto c_element_op = CElementOp{};
+
+    // do GEMM
+    auto gemm      = DeviceBatchedGemmV2Instance{};
+    auto invoker   = gemm.MakeInvoker();
+    float ave_time = 0;
+
+    auto argument =
+        gemm.MakeArgument(static_cast<ADataType*>(a_g_m_k_device_buf.GetDeviceBuffer()),
+                          static_cast<BDataType*>(b_g_k_n_device_buf.GetDeviceBuffer()),
+                          static_cast<CDataType*>(c_g_m_n_device_buf.GetDeviceBuffer()),
+                          M,
+                          N,
+                          K,
+                          stride_A,
+                          stride_B,
+                          stride_C,
+                          Scale_Stride_BN,
+                          batch_stride_A,
+                          batch_stride_B,
+                          batch_stride_C,
+                          batch_BScale_Stride,
+                          static_cast<BScaleDataType*>(b1_g_scale_device_buf.GetDeviceBuffer()),
+                          batch_count, // batch count
+                          KBatch,      // split K count
+                          a_element_op,
+                          b_element_op,
+                          c_element_op);
+
+    if(!gemm.IsSupportedArgument(argument))
+    {
+        std::cerr << gemm.GetTypeString() << " does not support this problem" << std::endl;
+
+        return true;
+    }
+
+    bool pass = true;
+    Tensor<float> b_g_k_n_dequant({batch_count, K, N});
+    if(config.do_verification)
+    {
+        float v_b = 0;
+        for(int bs = 0; bs < batch_count; bs++)
+        {
+            for(int n = 0; n < N; n++)
+            {
+                for(int k = 0; k < K; k++)
+                {
+                    ck::pk_i4_t i4x2 = b_g_k_n(bs, k, n).data;
+                    int8_t i4        = 0;
+                    if(k % 2 == 1)
+                        i4 = (i4x2.data >> 0) & 0xf;
+                    else
+                        i4 = (i4x2.data >> 4) & 0xf;
+                    i4  = i4 - 8;
+                    v_b = ck::type_convert<float>(i4);
+
+                    b_g_k_n_dequant(bs, k, n) =
+                        ck::type_convert<float>(v_b) *
+                        ck::type_convert<float>(b1_g_k_n(bs, k / Scale_Block_K, n / Scale_Block_N));
+                }
+            }
+        }
+
+        auto ref_gemm    = ReferenceBatchedGemmInstance{};
+        auto ref_invoker = ref_gemm.MakeInvoker();
+
+        auto ref_argument = ref_gemm.MakeArgument(a_g_m_k,
+                                                  b_g_k_n_dequant,
+                                                  c_g_m_n_host_result,
+                                                  PassThrough{},
+                                                  PassThrough{},
+                                                  PassThrough{});
+
+        ref_invoker.Run(ref_argument);
+
+        ave_time = invoker.Run(argument, StreamConfig{nullptr, false, 0});
+        hip_check_error(hipDeviceSynchronize());
+
+        c_g_m_n_device_buf.FromDevice(c_g_m_n_device_result.mData.data());
+
+        pass &= ck::utils::check_err(c_g_m_n_device_result,
+                                     c_g_m_n_host_result,
+                                     "Error: Incorrect results!",
+                                     get_rtol<CDataType>(),
+                                     get_atol<CDataType>());
+    }
+
+    if(config.time_kernel)
+    {
+        ave_time = invoker.Run(argument, StreamConfig{nullptr, config.time_kernel});
+
+        std::size_t flop = 2_uz * M * N * K;
+        std::size_t num_btype =
+            sizeof(ADataType) * M * K +
+            sizeof(BDataType) * K * N /
+                (ck::is_same_v<ck::remove_cvref_t<BDataType>, ck::pk_i4_t> ? 2 : 1) +
+            sizeof(CDataType) * M * N;
+
+        float tflops = static_cast<float>(flop) / 1.E9 / ave_time;
+
+        float gb_per_sec = num_btype / 1.E6 / ave_time;
+
+        std::cout << "Perf: " << ave_time << " ms, " << tflops << " TFlops, " << gb_per_sec
+                  << " GB/s, " << gemm.GetTypeString() << std::endl;
+    }
+
+#if 0
+    // print A matrix
+    printf("A matrix:\n");
+    for(int bs = 0; bs < batch_count; bs++)
+    {
+        printf("batch %d -> Address: %p\n", bs, static_cast<void*>(&a_g_m_k(bs, 0, 0)));
+        for(int i = 0; i < M; i++)
+        {
+            for(int j = 0; j < K; j++)
+            {
+                printf("%.2f,", static_cast<float>(a_g_m_k(bs, i, j)));
+            }
+            printf("\n");
+        }
+    }
+
+    // print B matrix original
+    printf("B matrix original:\n");
+    for(int bs = 0; bs < batch_count; bs++)
+    {
+        printf("batch %d -> Address: %p\n", bs, static_cast<void*>(&b_g_k_n(bs, 0, 0)));
+        for(int n = 0; n < N; n++)
+        {
+            for(int k = 0; k < K; k++)
+            {
+                ck::pk_i4_t i4x2 = b_g_k_n(bs, k, n).data;
+                int8_t i4        = 0;
+                if(k % 2 == 1)
+                    i4 = (i4x2.data >> 0) & 0xf;
+                else
+                    i4 = (i4x2.data >> 4) & 0xf;
+                i4 = i4 - 8;
+                printf("%d,", static_cast<int>(i4));
+            }
+            printf("\n");
+        }
+    }
+
+    // print B matrix
+    printf("B matrix:\n");
+    for(int bs = 0; bs < batch_count; bs++)
+    {
+        printf("batch %d -> Address: %p\n", bs, static_cast<void*>(&b_g_k_n_dequant(bs, 0, 0)));
+        for(int i = 0; i < K; i++)
+        {
+            for(int j = 0; j < N; j++)
+            {
+                printf("%.2f, ", static_cast<float>(b_g_k_n_dequant(bs, i, j)));
+            }
+            printf("\n");
+        }
+    }
+
+    // print B scale matrix
+    printf("B Scale matrix:\n");
+    for(int bs = 0; bs < batch_count; bs++)
+    {
+        printf("batch %d -> Address: %p\n", bs, static_cast<void*>(&b1_g_k_n(bs, 0, 0)));
+        for(int i = 0; i < (K + Scale_Block_K - 1) / Scale_Block_K; i++)
+        {
+            for(int j = 0; j < (N + Scale_Block_N - 1) / Scale_Block_N; j++)
+            {
+                printf("%.2f, ", static_cast<float>(b1_g_k_n(bs, i, j)));
+            }
+            printf("\n");
+        }
+    }
+
+    // print C matrix
+    printf("C matrix:\n");
+    for(int bs = 0; bs < batch_count; bs++)
+    {
+        printf(
+            "batch %d -> Address: %p\n", bs, static_cast<void*>(&c_g_m_n_device_result(bs, 0, 0)));
+        for(int i = 0; i < M; i++)
+        {
+            for(int j = 0; j < N; j++)
+            {
+                printf("%.2f, ", static_cast<float>(c_g_m_n_device_result(bs, i, j)));
+            }
+            printf("\n");
+        }
+    }
+
+    printf("C reference matrix:\n");
+    for(int bs = 0; bs < batch_count; bs++)
+    {
+        printf("batch %d -> Address: %p\n", bs, static_cast<void*>(&c_g_m_n_host_result(bs, 0, 0)));
+        for(int i = 0; i < M; i++)
+        {
+            for(int j = 0; j < N; j++)
+            {
+                printf("%.2f, ", static_cast<float>(c_g_m_n_host_result(bs, i, j)));
+            }
+            printf("\n");
+        }
+    }
+#endif
+
+    return pass;
+}
+
+bool run_batched_gemm_fp16_int4_b_scale_example(int argc, char* argv[])
+{
+    ProblemSize problem_size;
+    ExecutionConfig config;
+
+    std::mt19937 gen(11939);
+    std::uniform_int_distribution<int> dis(0, 15);
+
+    problem_size.M = 128 * (dis(gen) + 1);
+    problem_size.N = 128 * (dis(gen) + 1);
+    problem_size.K = 256 * (dis(gen) + 2);
+
+    problem_size.batch_count = 2;
+
+    if(argc == 4)
+    {
+        config.do_verification = std::stoi(argv[1]);
+        config.init_method     = std::stoi(argv[2]);
+        config.time_kernel     = std::stoi(argv[3]);
+    }
+    else if(argc >= 7)
+    {
+        config.do_verification = std::stoi(argv[1]);
+        config.init_method     = std::stoi(argv[2]);
+        config.time_kernel     = std::stoi(argv[3]);
+
+        problem_size.M = std::stoi(argv[4]);
+        problem_size.N = std::stoi(argv[5]);
+        problem_size.K = std::stoi(argv[6]);
+
+        if(argc >= 8)
+        {
+            problem_size.batch_count = std::stoi(argv[7]);
+        }
+
+        if(argc >= 9)
+        {
+            problem_size.KBatch = std::stoi(argv[8]);
+        }
+    }
+    else
+    {
+        printf("arg1: verification (0=no, 1=yes)\n");
+        printf("arg2: initialization (0=no init, 1=integer value, 2=decimal value)\n");
+        printf("arg3: time kernel (0=n0, 1=yes)\n");
+        exit(0);
+    }
+
+    problem_size.stride_A = problem_size.K;
+    problem_size.stride_B = problem_size.K;
+    problem_size.stride_C = problem_size.N;
+
+    problem_size.batch_stride_A = problem_size.M * problem_size.K;
+    problem_size.batch_stride_B = problem_size.K * problem_size.N;
+    problem_size.batch_stride_C = problem_size.M * problem_size.N;
+
+    return run_batched_gemm(problem_size, config);
+}

include/ck/tensor_operation/gpu/device/device_batched_gemm.hpp

@@ -44,6 +44,48 @@ struct DeviceBatchedGemm : public BaseOperator
     virtual std::unique_ptr<BaseInvoker> MakeInvokerPointer() = 0;
 };
 
+template <typename ALayout,
+          typename BLayout,
+          typename CLayout,
+          typename ADataType,
+          typename BDataType,
+          typename BScaleType,
+          typename CDataType,
+          index_t ScaleBlockN,
+          index_t ScaleBlockK,
+          typename AElementwiseOperation,
+          typename BElementwiseOperation,
+          typename CElementwiseOperation>
+struct DeviceBatchedGemmV2BScale : public BaseOperator
+{
+    virtual std::unique_ptr<BaseArgument>
+    MakeArgumentPointer(const void* p_a,
+                        const void* p_b,
+                        void* p_c,
+                        ck::index_t M,
+                        ck::index_t N,
+                        ck::index_t K,
+                        ck::index_t StrideA,
+                        ck::index_t StrideB,
+                        ck::index_t StrideC,
+                        ck::index_t StrideScaleB,
+                        ck::index_t BatchStrideA,
+                        ck::index_t BatchStrideB,
+                        ck::index_t BatchStrideC,
+                        ck::index_t BatchStrideScaleB,
+                        const void* p_b_scale,
+                        ck::index_t Batch,
+                        ck::index_t KBatch,
+                        AElementwiseOperation a_element_op,
+                        BElementwiseOperation b_element_op,
+                        CElementwiseOperation c_element_op) = 0;
+
+    virtual std::unique_ptr<BaseInvoker> MakeInvokerPointer() = 0;
+
+    virtual bool GetPermuteB()         = 0;
+    virtual ck::index_t GetKPerBlock() = 0;
+};
+
 template <typename ALayout,
           typename BLayout,
           typename CLayout,

include/ck/tensor_operation/gpu/grid/gridwise_gemm_xdl_cshuffle_v3_b_scale.hpp

@@ -37,7 +37,7 @@ __global__ void
 #if(!defined(__HIP_DEVICE_COMPILE__) || defined(__gfx9__))
     __shared__ char p_shared[GridwiseGemm::GetSharedMemoryNumberOfByte()];
 
-    auto splitk_batch_offset = typename GridwiseGemm::SplitKBatchOffset(karg);
+    auto splitk_batch_offset = typename GridwiseGemm::SplitKBatchOffset(karg, blockIdx.z);
 
     GridwiseGemm::template Run<HasMainKBlockLoop, CGlobalMemoryDataOperation, TailNum>(
         karg.p_a_grid + splitk_batch_offset.a_k_split_offset,
@@ -70,7 +70,7 @@ __global__ void
     __shared__ char p_shared_0[GridwiseGemm::GetSharedMemoryNumberOfByte()];
     __shared__ char p_shared_1[GridwiseGemm::GetSharedMemoryNumberOfByte()];
 
-    auto splitk_batch_offset = typename GridwiseGemm::SplitKBatchOffset(karg);
+    auto splitk_batch_offset = typename GridwiseGemm::SplitKBatchOffset(karg, blockIdx.z);
 
     GridwiseGemm::template Run_2Lds<HasMainKBlockLoop, CGlobalMemoryDataOperation, TailNum>(
         karg.p_a_grid + splitk_batch_offset.a_k_split_offset,
@@ -638,45 +638,45 @@ struct GridwiseGemm_xdl_cshuffle_v3
     struct SplitKBatchOffset
     {
 
-        __device__ SplitKBatchOffset(Argument& karg)
+        __device__ SplitKBatchOffset(Argument& karg, index_t k_id)
         {
             if constexpr(is_same_v<tensor_layout::gemm::RowMajor, ALayout>)
             {
-                a_k_split_offset = blockIdx.z * karg.KRead / APackedSize;
+                a_k_split_offset = k_id * karg.KRead / APackedSize;
             }
             else if constexpr(is_same_v<tensor_layout::gemm::ColumnMajor, ALayout>)
             {
-                a_k_split_offset = blockIdx.z * karg.KRead * karg.StrideA;
+                a_k_split_offset = k_id * karg.KRead * karg.StrideA;
             }
 
             if constexpr(is_same_v<tensor_layout::gemm::RowMajor, BLayout>)
             {
-                b_k_split_offset = blockIdx.z * karg.KRead * karg.StrideB;
+                b_k_split_offset = k_id * karg.KRead * karg.StrideB;
             }
             else if constexpr(is_same_v<tensor_layout::gemm::ColumnMajor, BLayout>)
             {
                 if constexpr(!PermuteB)
                 {
-                    b_k_split_offset = blockIdx.z * karg.KRead / BPackedSize;
+                    b_k_split_offset = k_id * karg.KRead / BPackedSize;
                 }
                 else
                 {
                     const int k0_offset = karg.KRead * karg.N;
-                    b_k_split_offset    = blockIdx.z * k0_offset / BPackedSize;
+                    b_k_split_offset    = k_id * k0_offset / BPackedSize;
                 }
             }
 
             // Calculate B scale offset
             if constexpr(is_same_v<tensor_layout::gemm::RowMajor, BLayout>)
             {
-                scale_k_split_offset = blockIdx.z * (karg.KRead / ScaleBlockK) * karg.StrideB;
+                scale_k_split_offset = k_id * (karg.KRead / ScaleBlockK) * karg.StrideB;
             }
             else if constexpr(is_same_v<tensor_layout::gemm::ColumnMajor, BLayout>)
             {
-                scale_k_split_offset = blockIdx.z * (karg.KRead / ScaleBlockK);
+                scale_k_split_offset = k_id * (karg.KRead / ScaleBlockK);
             }
 
-            if(blockIdx.z < static_cast<uint32_t>(karg.KBatch - 1))
+            if(k_id < (karg.KBatch - 1))
             {
                 karg.K = karg.KRead;
             }
@@ -687,7 +687,7 @@ struct GridwiseGemm_xdl_cshuffle_v3
 
             if(karg.IsReduceAdd())
             {
-                c_reduce_offset = blockIdx.z * karg.M * karg.N;
+                c_reduce_offset = k_id * karg.M * karg.N;
             }
             else
             {

library/include/ck/library/tensor_operation_instance/gpu/batched_gemm_b_scale.hpp

+// SPDX-License-Identifier: MIT
+// Copyright (c) 2025, Advanced Micro Devices, Inc. All rights reserved.
+
+#pragma once
+
+#include "ck/ck.hpp"
+#include "ck/tensor_operation/gpu/device/impl/device_batched_gemm_xdl_fpAintB_b_scale.hpp"
+#include "ck/tensor_operation/gpu/device/tensor_layout.hpp"
+#include "ck/tensor_operation/gpu/element/element_wise_operation.hpp"
+#include <memory>
+#include <vector>
+
+#include "ck/library/tensor_operation_instance/device_operation_instance_factory.hpp"
+
+namespace ck {
+namespace tensor_operation {
+namespace device {
+namespace instance {
+#if(defined(CK_ENABLE_FP16) || defined(CK_ENABLE_FP8))
+void add_device_batched_gemm_b_scale_xdl_f16_i4_f16_mk_nk_mn_mem_v2_default_instances(
+    std::vector<std::unique_ptr<DeviceBatchedGemmV2BScale<Row,
+                                                          Col,
+                                                          Row,
+                                                          F16,
+                                                          I4,
+                                                          F16,
+                                                          F16,
+                                                          1,
+                                                          128,
+                                                          PassThrough,
+                                                          PassThrough,
+                                                          PassThrough>>>& instances);
+#endif
+
+template <typename ADataType,
+          typename BDataType,
+          typename BScaleDataType,
+          typename CDataType,
+          typename ALayout,
+          typename BLayout,
+          typename CLayout,
+          index_t ScaleBlockK>
+struct DeviceOperationInstanceFactory<ck::tensor_operation::device::DeviceBatchedGemmV2BScale<
+    ALayout,
+    BLayout,
+    CLayout,
+    ADataType,
+    BDataType,
+    BScaleDataType,
+    CDataType,
+    1,
+    ScaleBlockK,
+    ck::tensor_operation::element_wise::PassThrough,
+    ck::tensor_operation::element_wise::PassThrough,
+    ck::tensor_operation::element_wise::PassThrough>>
+{
+    using DeviceOp = DeviceBatchedGemmV2BScale<ALayout,
+                                               BLayout,
+                                               CLayout,
+                                               ADataType,
+                                               BDataType,
+                                               BScaleDataType,
+                                               CDataType,
+                                               1,
+                                               ScaleBlockK,
+                                               ck::tensor_operation::element_wise::PassThrough,
+                                               ck::tensor_operation::element_wise::PassThrough,
+                                               ck::tensor_operation::element_wise::PassThrough>;
+
+    static auto GetInstances()
+    {
+        std::vector<std::unique_ptr<DeviceOp>> op_ptrs;
+
+        if constexpr(is_same_v<ADataType, half_t> && is_same_v<BDataType, pk_i4_t> &&
+                     is_same_v<CDataType, half_t>)
+        {
+            if constexpr(is_same_v<ALayout, Row> && is_same_v<BLayout, Col> &&
+                         is_same_v<CLayout, Row>)
+            {
+                add_device_batched_gemm_b_scale_xdl_f16_i4_f16_mk_nk_mn_mem_v2_default_instances(
+                    op_ptrs);
+            }
+        }
+
+        return op_ptrs;
+    }
+};
+
+} // namespace instance
+} // namespace device
+} // namespace tensor_operation
+} // namespace ck

library/src/tensor_operation_instance/gpu/batched_gemm_b_scale/CMakeLists.txt

+# ONLY XDL_KERNELS
+set(BATCHED_GEMM_B_SCALE_INSTANCES)
+
+list(APPEND BATCHED_GEMM_B_SCALE_INSTANCES 
+        device_batched_gemm_b_scale_xdl_f16_i4_f16/device_batched_gemm_b_scale_xdl_f16_i4_f16_mk_nk_mn_mem_v2_default_instance.cpp
+        )
+
+set_source_files_properties(device_batched_gemm_b_scale_xdl_f16_i4_f16/device_batched_gemm_b_scale_xdl_f16_i4_f16_mk_nk_mn_mem_v2_default_instance.cpp PROPERTIES COMPILE_OPTIONS ";-mllvm;-greedy-reverse-local-assignment=1")
+
+add_instance_library(device_batched_gemm_b_scale_instance ${BATCHED_GEMM_B_SCALE_INSTANCES})
\ No newline at end of file

library/src/tensor_operation_instance/gpu/batched_gemm_b_scale/device_batched_gemm_b_scale_xdl_f16_i4_f16/device_batched_gemm_b_scale_xdl_f16_i4_f16_mk_nk_mn_mem_v2_default_instance.cpp

+// SPDX-License-Identifier: MIT
+// Copyright (c) 2018-2025, Advanced Micro Devices, Inc. All rights reserved.
+
+#include "device_batched_gemm_b_scale_xdl_f16_i4_f16_mk_nk_mn.hpp"
+
+namespace ck {
+namespace tensor_operation {
+namespace device {
+namespace instance {
+void add_device_batched_gemm_b_scale_xdl_f16_i4_f16_mk_nk_mn_mem_v2_default_instances(
+    std::vector<std::unique_ptr<DeviceBatchedGemmV2BScale<Row,
+                                                          Col,
+                                                          Row,
+                                                          F16,
+                                                          I4,
+                                                          F16,
+                                                          F16,
+                                                          1,
+                                                          128,
+                                                          PassThrough,
+                                                          PassThrough,
+                                                          PassThrough>>>& instances)
+{
+    add_device_operation_instances(
+        instances,
+        device_batched_gemm_b_scale_xdl_f16_i4_f16_mk_nk_mn_mem_instances<Intrawave,
+                                                                          GemmDefault>{});
+}
+
+} // namespace instance
+} // namespace device
+} // namespace tensor_operation
+} // namespace ck

profiler/include/profiler/profile_batched_gemm_b_scale_impl.hpp

+// SPDX-License-Identifier: MIT
+// Copyright (c) 2023-2024, Advanced Micro Devices, Inc. All rights reserved.
+
+#pragma once
+
+#include <iomanip>
+#include <iostream>
+#include <typeinfo>
+
+#include "ck/ck.hpp"
+#include "ck/tensor_operation/gpu/device/impl/device_batched_gemm_xdl_fpAintB_b_scale.hpp"
+#include "ck/tensor_operation/gpu/device/tensor_layout.hpp"
+#include "ck/tensor_operation/gpu/element/element_wise_operation.hpp"
+
+#include "ck/library/tensor_operation_instance/gpu/batched_gemm_b_scale.hpp"
+
+#include "ck/library/reference_tensor_operation/cpu/reference_gemm.hpp"
+#include "ck/library/utility/check_err.hpp"
+#include "ck/library/utility/device_memory.hpp"
+#include "ck/library/utility/host_tensor.hpp"
+#include "ck/library/utility/host_tensor_generator.hpp"
+#include "ck/library/utility/literals.hpp"
+
+namespace ck {
+namespace profiler {
+
+template <typename ADataType,
+          typename BDataType,
+          typename BScaleDataType,
+          typename ComputeDataType,
+          typename AccDataType,
+          typename CDataType,
+          index_t ScaleBlockK,
+          typename ALayout,
+          typename BLayout,
+          typename CLayout>
+bool profile_batched_gemm_b_scale_impl(int do_verification,
+                                       int init_method,
+                                       bool do_log,
+                                       bool time_kernel,
+                                       int M,
+                                       int N,
+                                       int K,
+                                       int StrideA,
+                                       int StrideB,
+                                       int StrideC,
+                                       int BatchStrideA,
+                                       int BatchStrideB,
+                                       int BatchStrideC,
+                                       int BatchStrideScaleB,
+                                       int BatchSize,
+                                       int KBatch,
+                                       int n_warmup,
+                                       int n_iter,
+                                       uint64_t rotating = 0)
+{
+    bool pass = true;
+
+    auto f_host_tensor_descriptor = [](std::size_t batch_count,
+                                       std::size_t row,
+                                       std::size_t col,
+                                       std::size_t stride,
+                                       std::size_t batch_stride,
+                                       auto layout) {
+        using namespace ck::literals;
+
+        if(is_same<decltype(layout), tensor_layout::gemm::RowMajor>::value)
+        {
+            return HostTensorDescriptor({batch_count, row, col}, {batch_stride, stride, 1_uz});
+        }
+        else
+        {
+            return HostTensorDescriptor({batch_count, row, col}, {batch_stride, 1_uz, stride});
+        }
+    };
+
+    ck::index_t Scale_Stride_BN = ck::is_same_v<BLayout, ck::tensor_layout::gemm::ColumnMajor>
+                                      ? ((K + ScaleBlockK - 1) / ScaleBlockK)
+                                      : N;
+
+    Tensor<ADataType> a_g_m_k(
+        f_host_tensor_descriptor(BatchSize, M, K, StrideA, BatchStrideA, ALayout{}));
+    Tensor<BDataType> b_g_k_n(
+        f_host_tensor_descriptor(BatchSize, K, N, StrideB, BatchStrideB, BLayout{}));
+    Tensor<BDataType> b_g_k_n_permute(
+        f_host_tensor_descriptor(BatchSize, K, N, StrideB, BatchStrideB, BLayout{}));
+    Tensor<BScaleDataType> b1_g_k_n(f_host_tensor_descriptor(
+        BatchSize,
+        (K + ScaleBlockK - 1) / ScaleBlockK, // K direction group size is ScaleBlockK
+        N,                                   // N direction group size is 1
+        Scale_Stride_BN,
+        BatchStrideScaleB,
+        BLayout{}));
+    Tensor<CDataType> c_g_m_n_host_result(
+        f_host_tensor_descriptor(BatchSize, M, N, StrideC, BatchStrideC, CLayout{}));
+    Tensor<CDataType> c_g_m_n_device_result(
+        f_host_tensor_descriptor(BatchSize, M, N, StrideC, BatchStrideC, CLayout{}));
+
+    int total_gemm_needed = a_g_m_k.GetElementSpaceSizeInBytes() +
+                            b_g_k_n.GetElementSpaceSizeInBytes() +
+                            b1_g_k_n.GetElementSpaceSizeInBytes();
+
+    int rotating_count = std::max(
+        1,
+        std::min(n_iter,
+                 static_cast<int>(std::ceil(static_cast<double>(rotating) / total_gemm_needed))));
+
+    std::cout << "a_g_m_k: " << a_g_m_k.mDesc << std::endl;
+    std::cout << "b_g_k_n: " << b_g_k_n.mDesc << std::endl;
+    std::cout << "b1_g_k_n: " << b1_g_k_n.mDesc << std::endl;
+    std::cout << "c_g_m_n: " << c_g_m_n_device_result.mDesc << std::endl;
+    std::cout << "rotating count: " << rotating_count << std::endl;
+
+    switch(init_method)
+    {
+    case 0: break;
+    case 1:
+        a_g_m_k.GenerateTensorValue(GeneratorTensor_2<ADataType>{-1, 2});
+        b_g_k_n.GenerateTensorValue(GeneratorTensor_2<BDataType>{-1, 2});
+        b1_g_k_n.GenerateTensorValue(GeneratorTensor_3<BScaleDataType>{0, 1.0});
+        break;
+    case 2:
+        a_g_m_k.GenerateTensorValue(GeneratorTensor_3<ADataType>{0.0, 1.0});
+        b_g_k_n.GenerateTensorValue(GeneratorTensor_3<BDataType>{-0.5, 0.5});
+        b1_g_k_n.GenerateTensorValue(GeneratorTensor_3<BScaleDataType>{0, 1.0});
+        break;
+    default:
+        a_g_m_k.GenerateTensorValue(GeneratorTensor_3<ADataType>{0.0, 1.0});
+        b_g_k_n.GenerateTensorValue(GeneratorTensor_2<BDataType>{-2, 2});
+        b1_g_k_n.GenerateTensorValue(GeneratorTensor_3<BScaleDataType>{0, 1.0});
+    }
+
+    using AElementOp = ck::tensor_operation::element_wise::PassThrough;
+    using BElementOp = ck::tensor_operation::element_wise::PassThrough;
+    using CElementOp = ck::tensor_operation::element_wise::PassThrough;
+
+    const auto a_element_op = AElementOp{};
+    const auto b_element_op = BElementOp{};
+    const auto c_element_op = CElementOp{};
+
+    DeviceMem a_device_buf(sizeof(ADataType) * a_g_m_k.mDesc.GetElementSpaceSize());
+    DeviceMem b_device_buf(sizeof(BDataType) * b_g_k_n_permute.mDesc.GetElementSpaceSize());
+    DeviceMem b1_device_buf(sizeof(BScaleDataType) * b1_g_k_n.mDesc.GetElementSpaceSize());
+    DeviceMem c_device_buf(sizeof(CDataType) * c_g_m_n_device_result.mDesc.GetElementSpaceSize());
+
+    a_device_buf.ToDevice(a_g_m_k.mData.data());
+    b1_device_buf.ToDevice(b1_g_k_n.mData.data());
+
+    using DeviceOp = ck::tensor_operation::device::DeviceBatchedGemmV2BScale<ALayout,
+                                                                             BLayout,
+                                                                             CLayout,
+                                                                             ADataType,
+                                                                             BDataType,
+                                                                             BScaleDataType,
+                                                                             CDataType,
+                                                                             1,
+                                                                             ScaleBlockK,
+                                                                             AElementOp,
+                                                                             BElementOp,
+                                                                             CElementOp>;
+
+    // get device op instances
+    const auto op_ptrs = ck::tensor_operation::device::instance::DeviceOperationInstanceFactory<
+        DeviceOp>::GetInstances();
+
+    std::cout << "found " << op_ptrs.size() << " instances" << std::endl;
+
+    // Run reference GEMM
+    if(do_verification)
+    {
+        Tensor<float> b_g_k_n_dequant({K, N});
+
+        float v_b = 0;
+        for(int bs = 0; bs < BatchSize; bs++)
+        {
+            for(int n = 0; n < N; n++)
+            {
+                for(int k = 0; k < K; k++)
+                {
+                    ck::pk_i4_t i4x2 = b_g_k_n(bs, k, n).data;
+                    int8_t i4        = 0;
+                    if(k % 2 == 1)
+                        i4 = (i4x2.data >> 0) & 0xf;
+                    else
+                        i4 = (i4x2.data >> 4) & 0xf;
+                    i4  = i4 - 8;
+                    v_b = ck::type_convert<float>(i4);
+
+                    b_g_k_n_dequant(bs, k, n) =
+                        ck::type_convert<float>(v_b) *
+                        ck::type_convert<float>(b1_g_k_n(bs, k / ScaleBlockK, n));
+                }
+            }
+        }
+
+        using ReferenceGemmInstance = ck::tensor_operation::host::ReferenceGemm<ADataType,
+                                                                                BDataType,
+                                                                                CDataType,
+                                                                                AccDataType,
+                                                                                AElementOp,
+                                                                                BElementOp,
+                                                                                CElementOp,
+                                                                                ComputeDataType>;
+
+        auto ref_gemm    = ReferenceGemmInstance{};
+        auto ref_invoker = ref_gemm.MakeInvoker();
+
+        auto ref_argument = ref_gemm.MakeArgument(a_g_m_k,
+                                                  b_g_k_n_dequant,
+                                                  c_g_m_n_host_result,
+                                                  a_element_op,
+                                                  b_element_op,
+                                                  c_element_op);
+
+        ref_invoker.Run(ref_argument);
+    }
+
+    std::string best_op_name;
+    float best_ave_time   = 0;
+    float best_tflops     = 0;
+    float best_gb_per_sec = 0;
+    float best_kbatch     = 0;
+
+    // profile device GEMM instances
+    for(auto& op_ptr : op_ptrs)
+    {
+        const int KPerBlock = op_ptr->GetKPerBlock();
+
+        if(op_ptr->GetPermuteB())
+        {
+            int K1 = KPerBlock;
+            int K0 = K / KPerBlock;
+
+            // int K0, N, K1
+            for(int bs = 0; bs < BatchSize; bs++)
+            {
+                for(int j = 0; j < K0; j++)
+                {
+                    for(int i = 0; i < N; i++)
+                    {
+                        for(int jj = 0; jj < K1; jj++)
+                        {
+                            b_g_k_n_permute(bs * BatchStrideB + j * N * K1 + i * K1 + jj) =
+                                b_g_k_n(bs * BatchStrideB + i * K + (j * K1 + jj));
+                        }
+                    }
+                }
+            }
+
+            if(is_same_v<BDataType, pk_i4_t> && is_same_v<ADataType, half_t>)
+            {
+                // vector pk_i4x4 permute
+                for(int bs = 0; bs < BatchSize; bs++)
+                {
+                    for(int i = 0; i < N; i++)
+                    {
+                        for(int j = 0; j < K; j += 8)
+                        {
+                            int input[8];
+
+                            for(int k = 0; k < 4; k++)
+                            {
+                                int i4x2         = b_g_k_n_permute(bs, j + k * 2, i).data;
+                                input[k * 2 + 0] = (i4x2 >> 4) & 0xf;
+                                input[k * 2 + 1] = (i4x2 >> 0) & 0xf;
+                            }
+
+                            // permute 01234567->20643175
+                            {
+                                int hi   = input[2];
+                                int lo   = input[0];
+                                int i4x2 = (hi << 4) | lo;
+
+                                b_g_k_n_permute(bs, j + 0, i) = i4x2;
+                            }
+
+                            {
+                                int hi   = input[6];
+                                int lo   = input[4];
+                                int i4x2 = (hi << 4) | lo;
+
+                                b_g_k_n_permute(bs, j + 2, i) = i4x2;
+                            }
+
+                            {
+                                int hi   = input[3];
+                                int lo   = input[1];
+                                int i4x2 = (hi << 4) | lo;
+
+                                b_g_k_n_permute(bs, j + 4, i) = i4x2;
+                            }
+
+                            {
+                                int hi   = input[7];
+                                int lo   = input[5];
+                                int i4x2 = (hi << 4) | lo;
+
+                                b_g_k_n_permute(bs, j + 6, i) = i4x2;
+                            }
+                        }
+                    }
+                }
+            }
+        }
+        else
+        {
+            b_g_k_n_permute = b_g_k_n;
+        }
+
+        b_device_buf.ToDevice(b_g_k_n_permute.mData.data());
+
+        std::vector<int> kbatch_list = {1, 2, 4, 8, 16, 19, 32, 38};
+
+        if(KBatch > 0)
+        {
+            kbatch_list = {KBatch};
+        }
+
+        for(std::size_t i = 0; i < kbatch_list.size(); i++)
+        {
+            auto kbatch_curr = kbatch_list[i];
+
+            auto argument_ptr = op_ptr->MakeArgumentPointer(
+                static_cast<ADataType*>(a_device_buf.GetDeviceBuffer()),
+                static_cast<BDataType*>(b_device_buf.GetDeviceBuffer()),
+                static_cast<CDataType*>(c_device_buf.GetDeviceBuffer()),
+                M,
+                N,
+                K,
+                StrideA,
+                StrideB,
+                StrideC,
+                Scale_Stride_BN,
+                BatchStrideA,
+                BatchStrideB,
+                BatchStrideC,
+                BatchStrideScaleB,
+                static_cast<BScaleDataType*>(b1_device_buf.GetDeviceBuffer()),
+                BatchSize,   // Batch count
+                kbatch_curr, // Split K count
+                a_element_op,
+                b_element_op,
+                c_element_op);
+
+            auto invoker_ptr = op_ptr->MakeInvokerPointer();
+
+            if(op_ptr->IsSupportedArgument(argument_ptr.get()))
+            {
+
+                // re-init C to zero before profiling next kernel
+                c_device_buf.SetZero();
+
+                // invoker_ptr->Run(argument_ptr.get(),
+                //                  StreamConfig{nullptr, false, 0, n_warmup, n_iter});
+                invoker_ptr->Run(argument_ptr.get(), StreamConfig{nullptr, false, 0});
+
+                if(do_verification)
+                {
+                    c_device_buf.FromDevice(c_g_m_n_device_result.mData.data());
+
+#if defined CK_ENABLE_FP8
+                    // set softer tolerances for fp8
+                    if constexpr(is_same_v<ADataType, f8_t> || is_same_v<BDataType, f8_t> ||
+                                 is_same_v<CDataType, f8_t>)
+                    {
+                        std::string msg = "Error: Incorrect results!";
+                        double rtol     = 1e-1;
+                        double atol     = 1e-1;
+                        pass =
+                            pass & ck::utils::check_err(
+                                       c_g_m_n_device_result, c_g_m_n_host_result, msg, rtol, atol);
+                    }
+                    else
+                    {
+#endif
+                        pass =
+                            pass & ck::utils::check_err(c_g_m_n_device_result, c_g_m_n_host_result);
+#if defined CK_ENABLE_FP8
+                    }
+#endif
+
+                    if(do_log)
+                    {
+                        LogRangeAsType<float>(std::cout << "a : ", a_g_m_k.mData, ",") << std::endl;
+                        LogRangeAsType<float>(std::cout << "b: ", b_g_k_n.mData, ",") << std::endl;
+                        LogRangeAsType<float>(
+                            std::cout << "c_host  : ", c_g_m_n_host_result.mData, ",")
+                            << std::endl;
+                        LogRangeAsType<float>(
+                            std::cout << "c_device: ", c_g_m_n_device_result.mData, ",")
+                            << std::endl;
+                    }
+                }
+
+                std::string op_name = op_ptr->GetTypeString();
+
+                float ave_time = invoker_ptr->Run(argument_ptr.get(),
+                                                  StreamConfig{nullptr,
+                                                               time_kernel,
+                                                               0,
+                                                               n_warmup,
+                                                               n_iter,
+                                                               rotating_count > 1,
+                                                               rotating_count});
+
+                std::size_t flop = std::size_t(2) * M * N * K * BatchSize;
+
+                static constexpr index_t BPackedSize = []() {
+                    if constexpr(is_same_v<remove_cvref_t<BDataType>, pk_i4_t>)
+                        return 2;
+                    else
+                        return 1;
+                }();
+
+                std::size_t num_btype = sizeof(ADataType) * M * K +
+                                        sizeof(BDataType) * K * N / BPackedSize +
+                                        sizeof(CDataType) * M * N;
+
+                float tflops = static_cast<float>(flop) / 1.E9 / ave_time;
+
+                float gb_per_sec = num_btype / 1.E6 / ave_time;
+
+                std::cout << "Perf: " << std::setw(10) << ave_time << " ms, " << tflops
+                          << " TFlops, " << gb_per_sec << " GB/s, " << op_name << ", KBatch "
+                          << kbatch_curr << std::endl;
+
+                if(tflops > best_tflops && ave_time > 1e-10)
+                {
+                    best_op_name    = op_name;
+                    best_tflops     = tflops;
+                    best_ave_time   = ave_time;
+                    best_gb_per_sec = gb_per_sec;
+                    best_kbatch     = kbatch_curr;
+                }
+            }
+            else
+            {
+                std::cout << op_ptr->GetTypeString() << " does not support this problem"
+                          << std::endl;
+            }
+        }
+    }
+
+    if constexpr(is_same<CDataType, float>::value)
+    {
+        std::cout << "Best Perf for datatype = f32";
+    }
+    else if constexpr(is_same<CDataType, half_t>::value)
+    {
+        std::cout << "Best Perf for datatype = f16";
+    }
+    else if constexpr(is_same<CDataType, bhalf_t>::value)
+    {
+        std::cout << "Best Perf for datatype = bf16";
+    }
+    else if constexpr(is_same<CDataType, int8_t>::value)
+    {
+        std::cout << "Best Perf for datatype = int8";
+    }
+
+    if constexpr(is_same<ALayout, tensor_layout::gemm::RowMajor>::value)
+    {
+        std::cout << " ALayout =  RowMajor";
+    }
+    else if constexpr(is_same<ALayout, tensor_layout::gemm::ColumnMajor>::value)
+    {
+        std::cout << " ALayout =  ColumnMajor";
+    }
+
+    if constexpr(is_same<BLayout, tensor_layout::gemm::RowMajor>::value)
+    {
+        std::cout << " BLayout =  RowMajor";
+    }
+    else if constexpr(is_same<BLayout, tensor_layout::gemm::ColumnMajor>::value)
+    {
+        std::cout << " BLayout =  ColumnMajor";
+    }
+
+    std::cout << " M = " << M << " N = " << N << " K = " << K << " StrideA = " << StrideA
+              << " StrideB = " << StrideB << " StrideC = " << StrideC << " KBatch = " << best_kbatch
+              << " : " << best_ave_time << " ms, " << best_tflops << " TFlops, " << best_gb_per_sec
+              << " GB/s, " << best_op_name << std::endl;
+
+    return pass;
+}
+
+} // namespace profiler
+} // namespace ck

profiler/src/CMakeLists.txt

@@ -59,6 +59,7 @@ if(SUPPORTED_GPU_TARGETS MATCHES "gfx9")
   list(APPEND PROFILER_SOURCES profile_gemm_splitk.cpp)
   list(APPEND PROFILER_SOURCES profile_gemm_universal.cpp)
   list(APPEND PROFILER_SOURCES profile_gemm_b_scale.cpp)
+  list(APPEND PROFILER_SOURCES profile_batched_gemm_b_scale.cpp)
   list(APPEND PROFILER_SOURCES profile_gemm_universal_batched.cpp)
   list(APPEND PROFILER_SOURCES profile_gemm_universal_reduce.cpp)
   list(APPEND PROFILER_SOURCES profile_gemm_universal_streamk.cpp)
@@ -143,6 +144,7 @@ if(SUPPORTED_GPU_TARGETS MATCHES "gfx9")
   target_link_libraries(${PROFILER_EXECUTABLE} PRIVATE device_gemm_splitk_instance)
   target_link_libraries(${PROFILER_EXECUTABLE} PRIVATE device_gemm_universal_instance)
   target_link_libraries(${PROFILER_EXECUTABLE} PRIVATE device_gemm_b_scale_instance)
+  target_link_libraries(${PROFILER_EXECUTABLE} PRIVATE device_batched_gemm_b_scale_instance)
   target_link_libraries(${PROFILER_EXECUTABLE} PRIVATE device_gemm_universal_batched_instance)
   target_link_libraries(${PROFILER_EXECUTABLE} PRIVATE device_gemm_universal_reduce_instance)
   target_link_libraries(${PROFILER_EXECUTABLE} PRIVATE device_gemm_universal_streamk_instance)

profiler/src/profile_batched_gemm_b_scale.cpp

+// SPDX-License-Identifier: MIT
+// Copyright (c) 2025, Advanced Micro Devices, Inc. All rights reserved.
+
+#include <cstdlib>
+#include <initializer_list>
+#include <iostream>
+#include <numeric>
+
+#include "profiler/profile_batched_gemm_b_scale_impl.hpp"
+#include "profiler_operation_registry.hpp"
+
+enum struct GemmMatrixLayout
+{
+    MK_KN_MN, // 0
+    MK_NK_MN, // 1
+    KM_KN_MN, // 2
+    KM_NK_MN, // 3
+};
+
+enum struct GemmDataType
+{
+    F32_F32_F32,    // 0
+    F16_F16_F16,    // 1
+    BF16_BF16_BF16, // 2
+    INT8_INT8_INT8, // 3
+    F8_F16_F16,     // 4
+    F16_F8_F16,     // 5
+    F16_F16_F16_F8, // 6
+    F8_F8_BF16,     // 7
+    F16_I4_F16,     // 8
+};
+
+enum struct BScaleBlockTile
+{
+    K_64,  // 0
+    K_128, // 1
+};
+
+#define OP_NAME "batched_gemm_b_scale"
+#define OP_DESC "Int4-dequant batched GEMM"
+
+int profile_batched_gemm_b_scale(int argc, char* argv[])
+{
+    if(argc != 17 && argc != 20)
+    {
+        printf("arg1: tensor operation (" OP_NAME ": " OP_DESC ")\n");
+        printf("arg2: data type (0: fp32; 1: fp16; 2: bf16; 3: int8; 4: f8@f16; 5: f16@f8; 6: "
+               "f16->f8; 7: f8->bf16, "
+               "comp f8; 8: f16@i4)\n");
+        printf("arg3: matrix layout (0: A[m, k] * B[k, n] = C[m, n];\n");
+        printf("                     1: A[m, k] * B[n, k] = C[m, n];\n");
+        printf("                     2: A[k, m] * B[k, n] = C[m, n];\n");
+        printf("                     3: A[k, m] * B[n, k] = C[m, n])\n");
+        printf("arg4: B scale block tile (0: 64, 1: 128):\n");
+        printf("arg5: verification (0: no; 1: yes)\n");
+        printf("arg6: initialization (0: no init; 1: integer value; 2: decimal value)\n");
+        printf("arg7: print tensor value (0: no; 1: yes)\n");
+        printf("arg8: time kernel (0=no, 1=yes)\n");
+        printf("arg9 to 15: M, N, K, StrideA, StrideB, StrideC, BatachCount\n");
+        printf("arg16: split k into mulitiple batch\n");
+        printf("optional:\n");
+        printf("arg17: number of warm-up cycles (default 1)\n");
+        printf("arg18: number of iterations (default 10)\n");
+        printf("arg19: memory for rotating buffer (default 0, size in MB)\n");
+        exit(1);
+    }
+
+    printf("Start profiling\n");
+    const auto data_type       = static_cast<GemmDataType>(std::stoi(argv[2]));
+    const auto layout          = static_cast<GemmMatrixLayout>(std::stoi(argv[3]));
+    const auto B_scale_block   = static_cast<BScaleBlockTile>(std::stoi(argv[4]));
+    const bool do_verification = std::stoi(argv[5]);
+    const int init_method      = std::stoi(argv[6]);
+    const bool do_log          = std::stoi(argv[7]);
+    const bool time_kernel     = std::stoi(argv[8]);
+
+    const int M = std::stoi(argv[9]);
+    const int N = std::stoi(argv[10]);
+    const int K = std::stoi(argv[11]);
+
+    const int StrideA = std::stoi(argv[12]);
+    const int StrideB = std::stoi(argv[13]);
+    const int StrideC = std::stoi(argv[14]);
+
+    const int BatchStrideA = M * N;
+    const int BatchStrideB = N * K;
+    const int BatchStrideC = M * N;
+    const int BatchStrideScaleB =
+        (K + static_cast<int>(B_scale_block) - 1) / static_cast<int>(B_scale_block) * N;
+    const int BatchSize = std::stoi(argv[15]);
+    const int KBatch    = std::stoi(argv[16]);
+
+    printf("M:%d, N:%d, K:%d, StrideA:%d, StrideB:%d, StrideC:%d, BatchStrideA:%d, "
+           "BatchStrideB:%d, BatchStrideC:%d, BatchStrideScaleB:%d, BatchSize:%d, KBatch:%d,\n",
+           M,
+           N,
+           K,
+           StrideA,
+           StrideB,
+           StrideC,
+           BatchStrideA,
+           BatchStrideB,
+           BatchStrideC,
+           BatchStrideScaleB,
+           BatchSize,
+           KBatch);
+
+    int n_warmup      = 1;
+    int n_iter        = 10;
+    uint64_t rotating = 0;
+    if(argc == 20)
+    {
+        n_warmup = std::stoi(argv[17]);
+        n_iter   = std::stoi(argv[18]);
+        rotating = std::stoull(argv[19]) * 1024 * 1024;
+
+        printf("n_warmup:%d, n_iter:%d, rotating:%lu\n", n_warmup, n_iter, rotating);
+    }
+
+    using F32 = float;
+    using F16 = ck::half_t;
+    using I4  = ck::pk_i4_t;
+
+    using Row = ck::tensor_layout::gemm::RowMajor;
+    using Col = ck::tensor_layout::gemm::ColumnMajor;
+
+    auto profile = [&](auto a_type,
+                       auto b_type,
+                       auto b_scale_type,
+                       auto comp_type,
+                       auto acc_type,
+                       auto c_type,
+                       auto scale_block_k,
+                       auto a_layout,
+                       auto b_layout,
+                       auto c_layout) {
+        using ADataType       = decltype(a_type);
+        using BDataType       = decltype(b_type);
+        using BScaleDataType  = decltype(b_scale_type);
+        using ComputeDataType = decltype(comp_type);
+        using AccDataType     = decltype(acc_type);
+        using CDataType       = decltype(c_type);
+
+        using ALayout = decltype(a_layout);
+        using BLayout = decltype(b_layout);
+        using CLayout = decltype(c_layout);
+
+        const int DefaultStrideA = ck::is_same_v<ALayout, Row> ? K : M;
+        const int DefaultStrideB = ck::is_same_v<BLayout, Row> ? N : K;
+        const int DefaultStrideC = ck::is_same_v<CLayout, Row> ? N : M;
+
+        bool pass = ck::profiler::profile_batched_gemm_b_scale_impl<ADataType,
+                                                                    BDataType,
+                                                                    BScaleDataType,
+                                                                    ComputeDataType,
+                                                                    AccDataType,
+                                                                    CDataType,
+                                                                    scale_block_k,
+                                                                    ALayout,
+                                                                    BLayout,
+                                                                    CLayout>(
+            do_verification,
+            init_method,
+            do_log,
+            time_kernel,
+            M,
+            N,
+            K,
+            (StrideA < 0) ? DefaultStrideA : StrideA,
+            (StrideB < 0) ? DefaultStrideB : StrideB,
+            (StrideC < 0) ? DefaultStrideC : StrideC,
+            BatchStrideA,
+            BatchStrideB,
+            BatchStrideC,
+            BatchStrideScaleB,
+            BatchSize,
+            KBatch,
+            n_warmup,
+            n_iter,
+            rotating);
+
+        return pass ? 0 : 1;
+    };
+
+    if(data_type == GemmDataType::F16_I4_F16 && layout == GemmMatrixLayout::MK_NK_MN &&
+       B_scale_block == BScaleBlockTile::K_128)
+    {
+        printf("F16_I4_F16 MK_NK_MN K_128\n");
+        return profile(
+            F16{}, I4{}, F16{}, F16{}, F32{}, F16{}, ck::Number<128>{}, Row{}, Col{}, Row{});
+    }
+    else
+    {
+        std::cout << "this data_type & layout is not implemented" << std::endl;
+
+        return 1;
+    }
+}
+
+REGISTER_PROFILER_OPERATION(OP_NAME, OP_DESC, profile_batched_gemm_b_scale);