[Misc] Clean sgl-kernel test (#5216)

sgl-kernel/tests/speculative/test_eagle_utils.py

@@ -49,7 +49,6 @@ def test_verify_tree_greedy():
             if torch.max(target_logits[i][j]) < 10:
                 target_logits[i][j][18] = 10
 
-    print(f"{target_logits=}")
     target_predict = torch.argmax(target_logits, dim=-1).to(torch.int32)
     predict_shape = (12,)
 
@@ -65,12 +64,6 @@ def test_verify_tree_greedy():
     )  # mutable
     accept_token_num = torch.full((bs,), 0, dtype=torch.int32, device="cuda")  # mutable
 
-    print(f"{candidates=}")
-    print(f"{retrive_index=}")
-    print(f"{retrive_next_token=}")
-    print(f"{retrive_next_sibling=}")
-    print(f"{target_predict=}")
-
     verify_tree_greedy(
         predicts=predicts,
         accept_index=accept_index,
@@ -82,10 +75,6 @@ def test_verify_tree_greedy():
         target_predict=target_predict,
     )
 
-    print(f"{predicts=}")
-    print(f"{accept_index=}")
-    print(f"{accept_token_num=}")
-
     # Check the expected output.
     assert predicts.tolist() == [3, -1, -1, 4, 5, 18, 11, -1, -1, -1, 12, 18]
     assert accept_index.tolist() == [

sgl-kernel/tests/speculative/test_speculative_sampling.py

@@ -3,18 +3,47 @@ import torch
 import torch.nn.functional as F
 from sgl_kernel import tree_speculative_sampling_target_only
 
+test_cases = [
+    (
+        1,
+        1,
+        [3, -1, -1, 4, 5, 18, 11, -1, -1, -1, 12, 18],
+        [[0, 3, 4, 5], [6, 10, 11, -1]],
+        [3, 2],
+    ),
+    (
+        0,  # threshold_single
+        0,  # threshold_acc
+        [1, 2, 18, -1, -1, -1, 11, -1, -1, -1, 12, 18],
+        [[0, 1, 2, -1], [6, 10, 11, -1]],
+        [2, 2],
+    ),
+]
+
+
+@pytest.mark.parametrize(
+    "threshold_single, threshold_acc, expected_predicts, expected_accept_index, expected_accept_token_num",
+    test_cases,
+)
+def test_tree_speculative_sampling_target_only(
+    threshold_single,
+    threshold_acc,
+    expected_predicts,
+    expected_accept_index,
+    expected_accept_token_num,
+):
+    """
+    Tests the tree_speculative_sampling_target_only function using Pytest parameterization.
+    """
+    device = "cuda"
 
-def test_tree_speculative_sampling_target_only(threshold_single=1, threshold_acc=1):
-    print(
-        f"\n============= run test: {threshold_single=} {threshold_acc=} ==============\n"
-    )
     candidates = torch.tensor(
         [
             [0, 1, 2, 3, 4, 5],
             [7, 8, 9, 10, 11, 12],
         ],
         dtype=torch.int32,
-        device="cuda",
+        device=device,
     )
     retrive_index = torch.tensor(
         [
@@ -22,7 +51,7 @@ def test_tree_speculative_sampling_target_only(threshold_single=1, threshold_acc
             [6, 7, 8, 9, 10, 11],
         ],
         dtype=torch.int32,
-        device="cuda",
+        device=device,
     )
     retrive_next_token = torch.tensor(
         [
@@ -30,7 +59,7 @@ def test_tree_speculative_sampling_target_only(threshold_single=1, threshold_acc
             [4, 2, 3, -1, 5, -1],
         ],
         dtype=torch.int32,
-        device="cuda",
+        device=device,
     )
     retrive_next_sibling = torch.tensor(
         [
@@ -38,45 +67,34 @@ def test_tree_speculative_sampling_target_only(threshold_single=1, threshold_acc
             [-1, -1, -1, -1, 1, -1],
         ],
         dtype=torch.int32,
-        device="cuda",
+        device=device,
     )
 
-    target_logits = torch.full((2, 6, 20), 1, dtype=torch.float32, device="cuda")
+    target_logits = torch.full((2, 6, 20), 1, dtype=torch.float32, device=device)
     target_logits[0, 0, 3] = 10
     target_logits[0, 3, 4] = 10
     target_logits[0, 4, 5] = 10
     target_logits[1, 0, 11] = 10
     target_logits[1, 4, 12] = 10
+
     for i in range(target_logits.shape[0]):
         for j in range(target_logits.shape[1]):
-            if torch.max(target_logits[i][j]) < 10:
-                target_logits[i][j][18] = 10
+            if torch.max(target_logits[i, j]) < 10:
+                target_logits[i, j, 18] = 10
 
-    temperatures = torch.tensor([0.01, 0.01], dtype=torch.float32, device="cuda")
-    predict_shape = (12,)
+    temperatures = torch.tensor([0.01, 0.01], dtype=torch.float32, device=device)
+    bs, num_draft_tokens = candidates.shape
+    num_spec_step = len(expected_accept_index[0])
+    predict_shape = (len(expected_predicts),)
 
-    bs = candidates.shape[0]
-    num_spec_step = 4
-    num_draft_tokens = candidates.shape[1]
-
-    predicts = torch.full(
-        predict_shape, -1, dtype=torch.int32, device="cuda"
-    )  # mutable
-    accept_index = torch.full(
-        (bs, num_spec_step), -1, dtype=torch.int32, device="cuda"
-    )  # mutable
-    accept_token_num = torch.full((bs,), 0, dtype=torch.int32, device="cuda")  # mutable
+    predicts = torch.full(predict_shape, -1, dtype=torch.int32, device=device)
+    accept_index = torch.full((bs, num_spec_step), -1, dtype=torch.int32, device=device)
+    accept_token_num = torch.full((bs,), 0, dtype=torch.int32, device=device)
 
     expanded_temperature = temperatures.unsqueeze(1).unsqueeze(1)
     target_probs = F.softmax(target_logits / expanded_temperature, dim=-1)
-    draft_probs = torch.full_like(target_probs, 0, dtype=torch.float32, device="cuda")
-
-    coins = torch.rand(bs, num_draft_tokens, device="cuda").to(torch.float32)
-    print(f"{candidates=}")
-    print(f"{retrive_index=}")
-    print(f"{retrive_next_token=}")
-    print(f"{retrive_next_sibling=}")
-    print(f"{coins=}")
+    draft_probs = torch.full_like(target_probs, 0, dtype=torch.float32, device=device)
+    coins = torch.rand(bs, num_draft_tokens, device=device, dtype=torch.float32)
 
     tree_speculative_sampling_target_only(
         predicts=predicts,
@@ -94,24 +112,15 @@ def test_tree_speculative_sampling_target_only(threshold_single=1, threshold_acc
         deterministic=True,
     )
 
-    print(f"{predicts=}")
-    print(f"{accept_index=}")
-    print(f"{accept_token_num=}")
-
-    if threshold_single == 1 and threshold_acc == 1:
-        assert predicts.tolist() == [3, -1, -1, 4, 5, 18, 11, -1, -1, -1, 12, 18]
-        assert accept_index.tolist() == [
-            [0, 3, 4, 5],
-            [6, 10, 11, -1],
-        ]
-        assert accept_token_num.tolist() == [3, 2]
-    elif threshold_single == 0 and threshold_acc == 0:
-        assert predicts.tolist() == [1, 2, 18, -1, -1, -1, 11, -1, -1, -1, 12, 18]
-        assert accept_index.tolist() == [
-            [0, 1, 2, -1],
-            [6, 10, 11, -1],
-        ]
-        assert accept_token_num.tolist() == [2, 2]
+    assert (
+        predicts.tolist() == expected_predicts
+    ), f"Predicts mismatch for thresholds ({threshold_single}, {threshold_acc})"
+    assert (
+        accept_index.tolist() == expected_accept_index
+    ), f"Accept index mismatch for thresholds ({threshold_single}, {threshold_acc})"
+    assert (
+        accept_token_num.tolist() == expected_accept_token_num
+    ), f"Accept token num mismatch for thresholds ({threshold_single}, {threshold_acc})"
 
 
 if __name__ == "__main__":

sgl-kernel/tests/test_fp8_blockwise_gemm.py

@@ -79,7 +79,6 @@ def _test_accuracy_once(M, N, K, out_dtype, device):
     rtol = 0.02
     atol = 1
     torch.testing.assert_close(o, o1, rtol=rtol, atol=atol)
-    print(f"M={M}, N={N}, K={K}, out_dtype={out_dtype}: OK")
 
 
 @pytest.mark.parametrize("M", [1, 3, 5, 127, 128, 512, 1024, 4096])

sgl-kernel/tests/test_int8_gemm.py

@@ -28,7 +28,6 @@ def _test_accuracy_once(M, N, K, with_bias, out_dtype, device):
     o = int8_scaled_mm(a, b, scale_a, scale_b, out_dtype, bias)
     o1 = torch_scaled_mm(a, b, scale_a, scale_b, out_dtype, bias)
     torch.testing.assert_close(o, o1)
-    print(f"M={M}, N={N}, K={K}, with_bias={with_bias}, out_dtype={out_dtype}: OK")
 
 
 @pytest.mark.parametrize("M", [1, 16, 32, 64, 128, 512, 1024, 4096, 8192])

sgl-kernel/tests/test_lightning_attention_decode.py

@@ -70,8 +70,6 @@ def test_lightning_attention_decode(dtype, batch_size, num_heads, dim, embed_dim
         ref_output,
         rtol=rtol,
         atol=atol,
-        msg=f"Output mismatch for batch_size={batch_size}, num_heads={num_heads}, "
-        f"dim={dim}, embed_dim={embed_dim}, dtype={dtype}",
     )
 
     torch.testing.assert_close(
@@ -79,8 +77,6 @@ def test_lightning_attention_decode(dtype, batch_size, num_heads, dim, embed_dim
         ref_new_kv,
         rtol=rtol,
         atol=atol,
-        msg=f"New KV mismatch for batch_size={batch_size}, num_heads={num_heads}, "
-        f"dim={dim}, embed_dim={embed_dim}, dtype={dtype}",
     )
 
 

sgl-kernel/tests/test_moe_topk_softmax.py

@@ -42,12 +42,10 @@ def test_topk_softmax(num_tokens, num_experts, topk):
         topk_weights_ref, topk_weights, atol=1e-3, rtol=1e-3
     ), f"Weights mismatch: torch={topk_indices_ref} vs SGLang={topk_weights}"
 
-    assert torch.equal(
-        topk_indices_ref, topk_indices
+    assert torch.allclose(
+        topk_indices_ref.int(), topk_indices, atol=0, rtol=0
     ), f"Indices mismatch: torch={topk_indices_ref}, SGLang={topk_indices}"
 
-    print("✅ Native torch and custom kernel implementations match.")
-
 
 if __name__ == "__main__":
     pytest.main([__file__])

sgl-kernel/tests/test_per_token_group_quant_8bit.py

@@ -304,10 +304,10 @@ def test_per_token_group_quant_with_column_major(
         scale_tma_aligned=scale_tma_aligned,
     )
 
-    assert torch.allclose(
+    torch.testing.assert_close(
         x_q_triton.to(torch.float32), x_q_sglang.to(torch.float32), rtol=1e-3, atol=1e-5
     )
-    assert torch.allclose(
+    torch.testing.assert_close(
         x_s_triton.contiguous(), x_s_sglang.contiguous(), rtol=1e-3, atol=1e-5
     )
 

sgl-kernel/tests/test_rotary_embedding.py

@@ -187,9 +187,6 @@ def test_correctness(
         pos_ids, query_flashinfer, key_flashinfer
     )
 
-    print(query_ref_out)
-    print(query_flashinfer_out)
-
     torch.testing.assert_close(
         query_ref_out, query_flashinfer_out, atol=1e-2, rtol=1e-2
     )