Marlin 24 prefill performance improvement (about 25% better on average) (#4983)

benchmarks/kernels/benchmark_marlin.py

@@ -6,9 +6,13 @@ from benchmark_shapes import WEIGHT_SHAPES
 
 from vllm import _custom_ops as ops
 from vllm.model_executor.layers.quantization.gptq_marlin import (
+    GPTQ_MARLIN_MAX_PARALLEL, GPTQ_MARLIN_MIN_THREAD_N,
     GPTQ_MARLIN_SUPPORTED_GROUP_SIZES, GPTQ_MARLIN_SUPPORTED_NUM_BITS)
+from vllm.model_executor.layers.quantization.gptq_marlin_24 import (
+    GPTQ_MARLIN_24_MAX_PARALLEL, GPTQ_MARLIN_24_MIN_THREAD_N,
+    GPTQ_MARLIN_24_SUPPORTED_GROUP_SIZES, GPTQ_MARLIN_24_SUPPORTED_NUM_BITS)
 from vllm.model_executor.layers.quantization.utils.marlin_utils import (
-    MarlinWorkspace, marlin_quantize)
+    MarlinWorkspace, marlin_24_quantize, marlin_quantize)
 from vllm.model_executor.layers.quantization.utils.quant_utils import (
     gptq_pack, quantize_weights, sort_weights)
 
@@ -44,6 +48,10 @@ def bench_run(results, model, act_order, is_k_full, num_bits, group_size,
         marlin_rand_perm,
     ) = marlin_quantize(b, num_bits, group_size, act_order)
 
+    # Marlin_24 quant
+    (marlin_24_w_ref, marlin_24_q_w_comp, marlin_24_meta,
+     marlin_24_s) = marlin_24_quantize(b, num_bits, group_size)
+
     # GPTQ quant
     (w_ref, q_w, s, g_idx,
      rand_perm) = quantize_weights(b, num_bits, group_size, act_order)
@@ -56,28 +64,43 @@ def bench_run(results, model, act_order, is_k_full, num_bits, group_size,
         (q_w, g_idx, repack_sort_indices) = sort_weights(q_w, g_idx)
 
     # Prepare
-    marlin_workspace = MarlinWorkspace(size_n)
+    marlin_workspace = MarlinWorkspace(size_n, GPTQ_MARLIN_MIN_THREAD_N,
+                                       GPTQ_MARLIN_MAX_PARALLEL)
+
+    marlin_24_workspace = MarlinWorkspace(size_n, GPTQ_MARLIN_24_MIN_THREAD_N,
+                                          GPTQ_MARLIN_24_MAX_PARALLEL)
 
     globals = {
+        # Gen params
+        "num_bits": num_bits,
+        "group_size": group_size,
+        "size_m": size_m,
+        "size_n": size_n,
+        "size_k": size_k,
+        "a": a,
+        "a_tmp": a_tmp,
+        # Marlin params
         "marlin_w_ref": marlin_w_ref,
         "marlin_q_w": marlin_q_w,
         "marlin_s": marlin_s,
         "marlin_g_idx": marlin_g_idx,
         "marlin_sort_indices": marlin_sort_indices,
         "marlin_rand_perm": marlin_rand_perm,
+        "marlin_workspace": marlin_workspace,
+        "is_k_full": is_k_full,
+        # Marlin_24 params
+        "marlin_24_w_ref": marlin_24_w_ref,
+        "marlin_24_q_w_comp": marlin_24_q_w_comp,
+        "marlin_24_meta": marlin_24_meta,
+        "marlin_24_s": marlin_24_s,
+        "marlin_24_workspace": marlin_24_workspace,
+        # GPTQ params
         "q_w_gptq": q_w_gptq,
         "repack_sort_indices": repack_sort_indices,
-        "num_bits": num_bits,
+        # Kernels
-        "group_size": group_size,
-        "size_m": size_m,
-        "size_n": size_n,
-        "size_k": size_k,
-        "is_k_full": is_k_full,
-        "a": a,
-        "a_tmp": a_tmp,
         "gptq_marlin_gemm": ops.gptq_marlin_gemm,
+        "gptq_marlin_24_gemm": ops.gptq_marlin_24_gemm,
         "gptq_marlin_repack": ops.gptq_marlin_repack,
-        "marlin_workspace": marlin_workspace,
     }
 
     min_run_time = 1
@@ -105,6 +128,18 @@ def bench_run(results, model, act_order, is_k_full, num_bits, group_size,
             description="gptq_marlin_gemm",
         ).blocked_autorange(min_run_time=min_run_time))
 
+    if (num_bits in GPTQ_MARLIN_24_SUPPORTED_NUM_BITS
+            and group_size in GPTQ_MARLIN_24_SUPPORTED_GROUP_SIZES):
+        results.append(
+            benchmark.Timer(
+                stmt=
+                "output = gptq_marlin_24_gemm(a, marlin_24_q_w_comp, marlin_24_meta, marlin_24_s, marlin_24_workspace.scratch, num_bits, size_m, size_n, size_k)",  # noqa: E501
+                globals=globals,
+                label=label,
+                sub_label=sub_label,
+                description="gptq_marlin_24_gemm",
+            ).blocked_autorange(min_run_time=min_run_time))
+
     results.append(
         benchmark.Timer(
             stmt=
@@ -135,8 +170,20 @@ def main(args):
                 continue
 
             for act_order in ACT_ORDER_OPTS:
+                if len(args.limit_act_order
+                       ) > 0 and act_order not in args.limit_act_order:
+                    continue
+
                 for is_k_full in K_FULL_OPTS:
+                    if len(args.limit_k_full
+                           ) > 0 and is_k_full not in args.limit_k_full:
+                        continue
+
                     for num_bits in GPTQ_MARLIN_SUPPORTED_NUM_BITS:
+                        if len(args.limit_num_bits
+                               ) > 0 and num_bits not in args.limit_num_bits:
+                            continue
+
                         for group_size in GPTQ_MARLIN_SUPPORTED_GROUP_SIZES:
                             if len(
                                     args.limit_group_size
@@ -159,7 +206,7 @@ def main(args):
 
 
 # For quick benchmarking use:
-#   python benchmark_marlin.py --batch-sizes 1 16 32 --limit-k 4096 --limit-n 4096 --limit-group-size 128 # noqa E501
+#   python benchmark_marlin.py --batch-sizes 1 16 32 --limit-k 4096 --limit-n 4096 --limit-group-size 128 --limit-num-bits 4 --limit-act-order 0 --limit-k-full 1 # noqa E501
 #
 if __name__ == "__main__":
     parser = argparse.ArgumentParser(
@@ -178,6 +225,9 @@ if __name__ == "__main__":
     parser.add_argument("--limit-k", nargs="+", type=int, default=[])
     parser.add_argument("--limit-n", nargs="+", type=int, default=[])
     parser.add_argument("--limit-group-size", nargs="+", type=int, default=[])
+    parser.add_argument("--limit-num-bits", nargs="+", type=int, default=[])
+    parser.add_argument("--limit-act-order", nargs="+", type=int, default=[])
+    parser.add_argument("--limit-k-full", nargs="+", type=int, default=[])
 
     args = parser.parse_args()
     main(args)

csrc/quantization/marlin/sparse/marlin_24_cuda_kernel.cu

@@ -48,12 +48,12 @@ namespace marlin_24 {
 // than 1 warp per schedule allows some more latency hiding. At the same time,
 // we want relatively few warps to have many registers per warp and small tiles.
 static constexpr int THREADS = 256;
-static constexpr int STAGES = 4;  // 4 pipeline stages fit into shared memory
+static constexpr int STAGES = 4;
 
 static constexpr int min_thread_n = 128;
 
 static constexpr int tile_size = 16;
-static constexpr int max_par = 16;
+static constexpr int max_par = 64;
 
 #if defined(__CUDA_ARCH__) && __CUDA_ARCH__ < 800
 
@@ -736,10 +736,10 @@ __global__ void Marlin_24(
     for (int pipe = 0; pipe < stages;) {
       fetch_to_shared((pipe + stages - 1) % stages, pipe,
                       slice_iters >= stages);
+      matmul(pipe);
       wait_for_stage();
 
       fetch_to_registers(pipe + 1, (pipe + 1) % stages);
-      matmul(pipe);
 
       pipe++;
       slice_iters--;
@@ -899,9 +899,12 @@ void marlin_cuda_2_4(const void* A, const void* B, const void* meta, void* C,
       // than better compute utilization
       thread_k = 128;
       thread_m = 128;
-    } else {
+    } else if (prob_n <= 256) {
       thread_k = 64;
       thread_m = 256;
+    } else {
+      thread_k = 32;
+      thread_m = 512;
     }
   }
 
@@ -928,19 +931,21 @@ void marlin_cuda_2_4(const void* A, const void* B, const void* meta, void* C,
   int4* C_ptr = (int4*)C;
   const int4* s_ptr = (const int4*)s;
 
+  constexpr int max_m_blocks = 4;
+
   int* locks = (int*)workspace;
-  for (int i = 0; i < tot_n_blocks; i += 4) {
+  for (int i = 0; i < tot_n_blocks; i += max_m_blocks) {
     int thread_n_blocks = tot_n_blocks - i;
     prob_n = tot_n - 16 * i;
     int par = 1;
-    if (thread_n_blocks > 4) {
+    if (thread_n_blocks > max_m_blocks) {
       // Note that parallel > 1 currently only works for inputs without any
       // padding
-      par = (16 * thread_n_blocks - pad) / 64;
+      par = (16 * thread_n_blocks - pad) / (max_m_blocks * 16);
       if (par > max_par) par = max_par;
-      prob_n = 64 * par;
+      prob_n = (max_m_blocks * 16) * par;
-      i += 4 * (par - 1);
+      i += max_m_blocks * (par - 1);
-      thread_n_blocks = 4;
+      thread_n_blocks = max_m_blocks;
     }
 
     // For compilation speed, we only define the kernel configurations that have
@@ -951,8 +956,9 @@ void marlin_cuda_2_4(const void* A, const void* B, const void* meta, void* C,
     if (false) {
     }  //         BMxBNxBK,   group
     // 4-bit
-    CALL_IF_2_4(4, 8, 1, 4, -1)   // e.g., 16x128x128
+    CALL_IF_2_4(4, 8, 1, 4, -1)  // e.g., 16x128x128
-    CALL_IF_2_4(4, 8, 1, 4, 4)    // e.g., 16x128x128, 64
+    CALL_IF_2_4(4, 8, 1, 4, 4)   // e.g., 16x128x128, 64
+
     CALL_IF_2_4(4, 16, 1, 2, -1)  // e.g., 16x256x64
     CALL_IF_2_4(4, 16, 1, 2, 4)   // e.g., 16x256x64,  64
     CALL_IF_2_4(4, 16, 2, 2, -1)  // e.g.. 32x256x64
@@ -962,9 +968,19 @@ void marlin_cuda_2_4(const void* A, const void* B, const void* meta, void* C,
     CALL_IF_2_4(4, 16, 4, 2, -1)
     CALL_IF_2_4(4, 16, 4, 2, 4)
 
+    CALL_IF_2_4(4, 32, 1, 1, -1)  // e.g., 16x256x64
+    CALL_IF_2_4(4, 32, 1, 1, 4)   // e.g., 16x256x64,  64
+    CALL_IF_2_4(4, 32, 2, 1, -1)  // e.g.. 32x256x64
+    CALL_IF_2_4(4, 32, 2, 1, 4)
+    CALL_IF_2_4(4, 32, 3, 1, -1)
+    CALL_IF_2_4(4, 32, 3, 1, 4)
+    CALL_IF_2_4(4, 32, 4, 1, -1)
+    CALL_IF_2_4(4, 32, 4, 1, 4)
+
     // 8-bit
-    CALL_IF_2_4(8, 8, 1, 4, -1)   // e.g., 16x128x128
+    CALL_IF_2_4(8, 8, 1, 4, -1)  // e.g., 16x128x128
-    CALL_IF_2_4(8, 8, 1, 4, 4)    // e.g., 16x128x128, 64
+    CALL_IF_2_4(8, 8, 1, 4, 4)   // e.g., 16x128x128, 64
+
     CALL_IF_2_4(8, 16, 1, 2, -1)  // e.g., 16x256x64
     CALL_IF_2_4(8, 16, 1, 2, 4)   // e.g., 16x256x64,  64
     CALL_IF_2_4(8, 16, 2, 2, -1)  // e.g.. 32x256x64
@@ -973,6 +989,15 @@ void marlin_cuda_2_4(const void* A, const void* B, const void* meta, void* C,
     CALL_IF_2_4(8, 16, 3, 2, 4)
     CALL_IF_2_4(8, 16, 4, 2, -1)
     CALL_IF_2_4(8, 16, 4, 2, 4)
+
+    CALL_IF_2_4(8, 32, 1, 1, -1)  // e.g., 16x256x64
+    CALL_IF_2_4(8, 32, 1, 1, 4)   // e.g., 16x256x64,  64
+    CALL_IF_2_4(8, 32, 2, 1, -1)  // e.g.. 32x256x64
+    CALL_IF_2_4(8, 32, 2, 1, 4)
+    CALL_IF_2_4(8, 32, 3, 1, -1)
+    CALL_IF_2_4(8, 32, 3, 1, 4)
+    CALL_IF_2_4(8, 32, 4, 1, -1)
+    CALL_IF_2_4(8, 32, 4, 1, 4)
     else {
       throw std::runtime_error("Unsupported shapes: MKN = [" + str(prob_m) +
                                ", " + str(prob_k) + ", " + str(prob_n) + "]" +
@@ -1062,7 +1087,7 @@ torch::Tensor gptq_marlin_24_gemm(torch::Tensor& a, torch::Tensor& b_q_weight,
   int thread_k = -1;
   int thread_m = -1;
   int sms = -1;
-  int max_par = 16;
+  int max_par = marlin_24::max_par;
 
   int groupsize = -1;
   if (b_scales.size(0) > 1) {

tests/kernels/test_marlin_gemm.py

@@ -27,7 +27,7 @@ MARLIN_K_CHUNKS = [128]
 MARLIN_N_CHUNKS = [64, 128, 256]
 
 MARLIN_24_K_CHUNKS = [128]
-MARLIN_24_N_CHUNKS = [256]
+MARLIN_24_N_CHUNKS = [512]
 
 MNK_FACTORS = [
     (1, 1, 1),

vllm/model_executor/layers/quantization/gptq_marlin_24.py

@@ -15,7 +15,7 @@ logger = init_logger(__name__)
 GPTQ_MARLIN_24_TILE = 16
 GPTQ_MARLIN_24_MIN_THREAD_N = 128
 GPTQ_MARLIN_24_MIN_THREAD_K = 128
-GPTQ_MARLIN_24_MAX_PARALLEL = 16
+GPTQ_MARLIN_24_MAX_PARALLEL = 64
 
 GPTQ_MARLIN_24_SUPPORTED_NUM_BITS = [4, 8]
 GPTQ_MARLIN_24_SUPPORTED_GROUP_SIZES = [-1, 128]
@@ -53,14 +53,14 @@ class GPTQMarlin24Config(QuantizationConfig):
         self.tile_size = 16
 
         # Min out_features dim
-        self.min_n_threads = 128
+        self.min_n_threads = GPTQ_MARLIN_24_MIN_THREAD_N
 
         # Min in_features dim
-        self.min_k_threads = 128
+        self.min_k_threads = GPTQ_MARLIN_24_MIN_THREAD_K
 
         # Max parallel problems to solve at once (improves large
         # batch performance)
-        self.max_parallel = 16
+        self.max_parallel = GPTQ_MARLIN_24_MAX_PARALLEL
 
         # Permutation length used by the marlin kernels.
         self.perm_len = 1024