release initial code

Co-authored-by: Ying Sheng <sqy1415@gmail.com>
Co-authored-by: Liangsheng Yin <hnyls2002@gmail.com>
Co-authored-by: Zhiqiang Xie <xiezhq@stanford.edu>
Co-authored-by: parasol-aser <3848358+parasol-aser@users.noreply.github.com>
Co-authored-by: LiviaSun <33578456+ChuyueSun@users.noreply.github.com>
Co-authored-by: Cody Yu <hao.yu.cody@gmail.com>

benchmark/hellaswag/bench_sglang.py

@@ -0,0 +1,96 @@
+import argparse
+import json
+import time
+
+import numpy as np
+from sglang.test.test_utils import add_common_sglang_args_and_parse, select_sglang_backend
+from sglang.utils import read_jsonl
+
+
+def get_one_example(lines, i, include_answer):
+    ret = lines[i]["activity_label"] + ": " +  lines[i]["ctx"] + " "
+    if include_answer:
+        ret += lines[i]["endings"][lines[i]["label"]]
+    return ret
+
+
+def get_few_shot_examples(lines, k):
+    ret = ""
+    for i in range(k):
+        ret += get_one_example(lines, i, True) + "\n\n"
+    return ret
+
+
+def main(args):
+    lines = read_jsonl(args.data_path)
+
+    # Construct prompts
+    k = args.num_shot
+    few_shot_examples = get_few_shot_examples(lines, k)
+
+    questions = []
+    choices = []
+    labels = []
+    for i in range(len(lines[:args.num_questions])):
+        questions.append(get_one_example(lines, i, False))
+        choices.append(lines[i]["endings"])
+        labels.append(lines[i]["label"])
+    arguments = [
+        {"question": q, "choices": c}
+        for q, c in zip(questions, choices)
+    ]
+
+    #####################################
+    ######### SGL Program Begin #########
+    #####################################
+
+    import sglang as sgl
+    
+    @sgl.function
+    def few_shot_hellaswag(s, question, choices):
+        s += few_shot_examples + question
+        s += sgl.select("answer", choices=choices)
+
+    #####################################
+    ########## SGL Program End ##########
+    #####################################
+
+    # Select backend
+    backend = select_sglang_backend(args)
+
+    # Run requests
+    tic = time.time()
+    rets = few_shot_hellaswag.run_batch(
+        arguments, temperature=0, backend=backend, num_threads=args.parallel)
+    preds = [choices[i].index(rets[i]["answer"]) for i in range(len(rets))]
+    latency = time.time() - tic
+
+    # Compute accuracy
+    acc = np.mean(np.array(preds) == np.array(labels))
+    print(f"Latency: {latency:.3f}")
+    print(f"Accuracy: {acc:.3f}")
+
+    # Write results
+    with open(args.result_file, "a") as fout:
+        value = {
+            "task": "hellaswag",
+            "backend": args.backend,
+            "num_gpus": 1,
+            "latency": round(latency, 3),
+            "accuracy": round(acc, 3),
+            "num_requests": args.num_questions,
+            "other": {
+                "num_questions": args.num_questions,
+                "parallel": args.parallel,
+            }
+        }
+        fout.write(json.dumps(value) + "\n")
+
+
+if __name__ == "__main__":
+    parser = argparse.ArgumentParser()
+    parser.add_argument("--num-shot", type=int, default=20)
+    parser.add_argument("--data-path", type=str, default="hellaswag_val.jsonl")
+    parser.add_argument("--num-questions", type=int, default=100)
+    args = add_common_sglang_args_and_parse(parser)
+    main(args)