[misc] Move bench_one_batch into sglang/benchmark/ with a back-compat shim (#28687)

python/sglang/test/test_utils.py

@@ -1564,7 +1564,7 @@ def run_bench_one_batch(model, other_args):
     command = [
         "python3",
         "-m",
-        "sglang.bench_one_batch",
+        "sglang.benchmark.one_batch",
         "--batch-size",
         "1",
         "--input",

test/manual/test_forward_split_prefill.py

@@ -13,7 +13,7 @@ from array import array
 import numpy as np
 import torch
 
-from sglang.bench_one_batch import TreeCacheNamespace
+from sglang.benchmark.one_batch import TreeCacheNamespace
 from sglang.srt.configs.model_config import ModelConfig
 from sglang.srt.managers.schedule_batch import Req, ScheduleBatch
 from sglang.srt.model_executor.forward_batch_info import ForwardBatch, ForwardMode