use topk_softmax with sgl-kernel (#4439)

.github/workflows/execute-notebook.yml

@@ -20,7 +20,7 @@ jobs:
     if: github.repository == 'sgl-project/sglang' || github.event_name == 'pull_request'
     steps:
       - name: Checkout code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Set up Python
         uses: actions/setup-python@v4

.github/workflows/experiment-runner.yml

@@ -17,7 +17,7 @@ jobs:
     runs-on: 1-gpu-runner
     steps:
       - name: Checkout code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Install dependencies
         run: |

.github/workflows/lint.yml

@@ -6,7 +6,7 @@ jobs:
   lint:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
 
       - name: Set up Python
         uses: actions/setup-python@v4

.github/workflows/nightly-test.yml

@@ -20,7 +20,7 @@ jobs:
     runs-on: 2-gpu-runner
     steps:
       - name: Checkout code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Install dependencies
         run: |

.github/workflows/pr-test-amd.yml

@@ -25,7 +25,7 @@ jobs:
     runs-on: linux-mi300-gpu-1
     steps:
       - name: Checkout code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Setup docker
         run: |
@@ -64,7 +64,7 @@ jobs:
     runs-on: linux-mi300-gpu-1
     steps:
       - name: Checkout code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Setup docker
         run: |

.github/workflows/pr-test-rust.yml

@@ -21,7 +21,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Install dependencies
         run: |
@@ -45,7 +45,7 @@ jobs:
     runs-on: 2-gpu-runner
     steps:
       - name: Checkout code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Install rust dependencies
         run: |

.github/workflows/pr-test-sgl-kernel.yml

@@ -20,7 +20,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Check clang-format
         uses: DoozyX/clang-format-lint-action@v0.18.1

.github/workflows/pr-test.yml

@@ -39,7 +39,7 @@ jobs:
       run_tests: ${{ steps.set_run_tests.outputs.run_tests }}
     steps:
       - name: Checkout code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Filter changes
         id: filter
         uses: dorny/paths-filter@v2
@@ -72,7 +72,7 @@ jobs:
     runs-on: 1-gpu-runner
     steps:
       - name: Checkout code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Install dependencies
         env:
@@ -98,7 +98,7 @@ jobs:
         part: [0, 1, 2, 3, 4, 5, 6]
     steps:
       - name: Checkout code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Install dependencies
         env:
@@ -120,7 +120,7 @@ jobs:
     runs-on: 2-gpu-runner
     steps:
       - name: Checkout code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Install dependencies
         env:
@@ -172,7 +172,7 @@ jobs:
     runs-on: 1-gpu-runner
     steps:
       - name: Checkout code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Install dependencies
         env:
@@ -218,7 +218,7 @@ jobs:
     runs-on: 1-gpu-runner
     steps:
       - name: Checkout code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Install dependencies
         env:
@@ -252,7 +252,7 @@ jobs:
     runs-on: 2-gpu-runner
     steps:
       - name: Checkout code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Install dependencies
         env:
@@ -294,7 +294,7 @@ jobs:
     runs-on: 1-gpu-runner
     steps:
       - name: Checkout code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Install dependencies
         env:
@@ -319,7 +319,7 @@ jobs:
     runs-on: 2-gpu-runner
     steps:
       - name: Checkout code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Install dependencies
         env:

.github/workflows/release-docker-amd-nightly.yml

@@ -23,7 +23,7 @@ jobs:
         build_type: ['all', 'srt']
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: "Set Date"
         run: |

.github/workflows/release-docker-amd.yml

@@ -18,7 +18,7 @@ jobs:
         build_type: ['all', 'srt']
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Free disk space
         uses: jlumbroso/free-disk-space@main

.github/workflows/release-docker-dev.yml

@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-22.04
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Free disk space
         uses: jlumbroso/free-disk-space@main

.github/workflows/release-docker.yml

@@ -21,7 +21,7 @@ jobs:
         run: rm -rf /opt/hostedtoolcache
 
       - name: Checkout repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Login to Docker Hub
         uses: docker/login-action@v2

.github/workflows/release-docs.yml

@@ -20,7 +20,7 @@ jobs:
     if: github.repository == 'sgl-project/sglang'
     steps:
       - name: Checkout code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Set up Python
         uses: actions/setup-python@v4

.github/workflows/release-fake-tag.yml

@@ -17,7 +17,7 @@ jobs:
     environment: 'prod'
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Get version
         id: get_version

.github/workflows/release-pypi.yml

@@ -19,7 +19,7 @@ jobs:
           python-version: '3.9'
 
       - name: Checkout repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Upload to pypi
         run: |

python/pyproject.toml

@@ -43,7 +43,7 @@ runtime_common = [
 
 srt = [
     "sglang[runtime_common]",
-    "sgl-kernel==0.0.5",
+    "sgl-kernel==0.0.5.post1",
     "flashinfer_python==0.2.3",
     "torch==2.5.1",
     "vllm>=0.6.4.post1,<=0.7.2",

python/sglang/srt/layers/moe/topk.py

@@ -17,7 +17,9 @@ from typing import Callable, Optional
 import torch
 import torch.nn.functional as F
 
-from sglang.srt.utils import get_compiler_backend
+from sglang.srt.utils import get_compiler_backend, is_cuda
+
+_is_cuda = is_cuda()
 
 
 def fused_topk_native(
@@ -47,6 +49,9 @@ def fused_topk(
     topk: int,
     renormalize: bool,
 ):
+    if _is_cuda:
+        from sgl_kernel import topk_softmax
+    else:
         from vllm import _custom_ops as ops
 
     assert hidden_states.shape[0] == gating_output.shape[0], "Number of tokens mismatch"
@@ -61,6 +66,14 @@ def fused_topk(
         M, topk, dtype=torch.int32, device=hidden_states.device
     )
 
+    if _is_cuda:
+        topk_softmax(
+            topk_weights,
+            topk_ids,
+            token_expert_indicies,
+            gating_output.float(),
+        )
+    else:
         ops.topk_softmax(
             topk_weights,
             topk_ids,

scripts/ci_install_dependency.sh

@@ -26,4 +26,4 @@ pip install transformers==4.45.2 sentence_transformers accelerate==1.4.0 peft pa
 pip install cuda-python nvidia-cuda-nvrtc-cu12
 
 # reinstall sgl-kernel
-pip install sgl-kernel==0.0.5 --force-reinstall --no-deps
+pip install sgl-kernel==0.0.5.post1 --force-reinstall --no-deps