hqq unit tests

tests/kernels/test_marlin_gemm.py

@@ -29,6 +29,7 @@
     marlin_qqq_quantize)
 from vllm.model_executor.layers.quantization.utils.quant_utils import (
     awq_pack, gptq_pack, gptq_quantize_weights, quantize_weights, sort_weights)
+from vllm.scalar_type import scalar_types
 
 ACT_ORDER_OPTS = [False, True]
 K_FULL_OPTS = [False, True]
@@ -453,6 +454,87 @@ def test_awq_marlin_gemm(
     assert max_diff < 0.04
 
 
+@pytest.mark.skipif(not is_quant_method_supported("gptq_marlin"),
+                    reason="Marlin is not supported on this GPU type.")
+@pytest.mark.parametrize("k_chunk", MARLIN_K_CHUNKS)
+@pytest.mark.parametrize("n_chunk", MARLIN_N_CHUNKS)
+@pytest.mark.parametrize("group_size", [64])
+@pytest.mark.parametrize("mnk_factors", MNK_FACTORS)
+@pytest.mark.parametrize("use_fp32_reduce", USE_FP32_REDUCE_OPTS)
+def test_hqq_marlin_gemm(
+    k_chunk,
+    n_chunk,
+    group_size,
+    mnk_factors,
+    use_fp32_reduce,
+):
+    m_factor, n_factor, k_factor = mnk_factors
+
+    size_m = m_factor
+    size_k = k_chunk * k_factor
+    size_n = n_chunk * n_factor
+
+    quant_type = scalar_types.uint4
+
+    a_input = rand_data((size_m, size_k))
+    dev = a_input.device
+
+    b_weight = torch.randint(0,
+                             10, (size_n, size_k),
+                             dtype=torch.uint8,
+                             device=dev)
+    scale = rand_data((size_n, size_k // group_size))
+    zero = rand_data((size_n, size_k // group_size))
+
+    gptq_w_q = gptq_pack(b_weight.transpose(1, 0), 4, size_k, size_n)
+
+    sort_indices = torch.empty(0, dtype=torch.int, device=dev)
+    marlin_w_q = ops.gptq_marlin_repack(gptq_w_q, sort_indices, size_k, size_n,
+                                        4).to(dev)
+    marlin_s = marlin_permute_scales(scale.transpose(1, 0), size_k, size_n,
+                                     group_size).to(dev)
+    marlin_zp = marlin_permute_scales(zero.transpose(1, 0), size_k, size_n,
+                                      group_size).to(dev)
+
+    g_idx = marlin_make_empty_g_idx(dev)
+    g_idx_sort_indices = marlin_make_empty_g_idx(dev)
+
+    workspace = MarlinWorkspace(size_n, GPTQ_MARLIN_MIN_THREAD_N,
+                                GPTQ_MARLIN_MAX_PARALLEL)
+
+    output = ops.gptq_marlin_gemm(
+        a_input,
+        marlin_w_q,
+        marlin_s,
+        marlin_zp,
+        g_idx,
+        g_idx_sort_indices,
+        workspace.scratch,
+        quant_type,
+        a_input.shape[0],
+        b_weight.shape[0],
+        a_input.shape[1],
+        is_k_full=True,
+        has_zp=True,
+        use_fp32_reduce=use_fp32_reduce,
+        is_zp_float=True,
+    )
+
+    b_flat = b_weight.reshape(-1, group_size)
+    zp_flat = zero.reshape(-1, 1)
+    s_flat = scale.reshape(-1, 1)
+    dequant = (b_flat - zp_flat) * s_flat
+
+    output_ref = torch.matmul(a_input,
+                              dequant.reshape(b_weight.shape).transpose(1, 0))
+
+    torch.cuda.synchronize()
+
+    max_diff = compute_max_diff(output, output_ref)
+
+    assert max_diff < 0.04
+
+
 @pytest.mark.skipif(not is_quant_method_supported("qqq"),
                     reason="Marlin is not supported on this GPU type.")
 @pytest.mark.parametrize("k_chunk", MARLIN_K_CHUNKS)