diff --git a/colossalai/inference/engine/engine.py b/colossalai/inference/engine/engine.py
index a9ffc36a8..61da5858a 100644
--- a/colossalai/inference/engine/engine.py
+++ b/colossalai/inference/engine/engine.py
@@ -33,13 +33,16 @@ class InferenceEngine:
     Args:
         tp_size (int): the size of tensor parallelism.
         pp_size (int): the size of pipeline parallelism.
+        dtype (str): the data type of the model, should be one of 'fp16', 'fp32', 'bf16'.
         model (`nn.Module`): the model not in pipeline style, and will be modified with `ShardFormer`.
-        model_policy (`colossalai.shardformer.policies.base_policy.Policy`): the policy to shardformer model.
-        micro_batch_size (int): the micro batch size.
+        model_policy (`colossalai.shardformer.policies.base_policy.Policy`): the policy to shardformer model. It will be determined by the model type if not provided.
+        micro_batch_size (int): the micro batch size. Only useful when `pp_size` > 1.
         micro_batch_buffer_size (int): the buffer size for micro batch. Normally, it should be the same as the number of pipeline stages.
         max_batch_size (int): the maximum batch size.
         max_input_len (int): the maximum input length.
         max_output_len (int): the maximum output length.
+        quant (str): the quantization method, should be one of 'smoothquant', 'gptq', None.
+        verbose (bool): whether to return the time cost of each step.
 
     """
 
diff --git a/colossalai/pipeline/schedule/generate.py b/colossalai/pipeline/schedule/generate.py
index e1a2d38cd..72480526b 100644
--- a/colossalai/pipeline/schedule/generate.py
+++ b/colossalai/pipeline/schedule/generate.py
@@ -69,6 +69,8 @@ class GenerateSchedule(PipelineSchedule):
             batch = tree_map(partial(to_device, device=device), batch)
         self.batch = batch
         self.batch_size = get_batch_size(batch)
+        if self.stage_manager.num_stages == 1:
+            self.microbatch_size = self.batch_size
         self.microbatch_offset = 0
         assert (
             self.batch_size % self.microbatch_size == 0
diff --git a/examples/inference/_utils.py b/examples/inference/_utils.py
deleted file mode 100644
index 67d897836..000000000
--- a/examples/inference/_utils.py
+++ /dev/null
@@ -1,19 +0,0 @@
-def print_perf_stats(latency_set, config, bs, warmup=3):
-    # trim warmup queries
-    latency_set = list(latency_set)
-    latency_set = latency_set[warmup:]
-    count = len(latency_set)
-
-    if count > 0:
-        latency_set.sort()
-        avg = sum(latency_set) / count
-        num_layers = (
-            getattr(config, "num_layers") if hasattr(config, "num_layers") else getattr(config, "num_hidden_layers")
-        )
-        num_parameters = num_layers * config.hidden_size * config.hidden_size * 12
-        num_bytes = 2  # float16
-
-        print("Avg Per Token Latency: {0:8.2f} ms".format(avg * 1000))
-        print("Avg BW: {0:8.2f} GB/s".format(1 / avg * num_parameters * num_bytes / 1e9))
-        print("Avg flops: {0:8.2f} TFlops/s".format(1 / avg * num_parameters * num_bytes * bs / 1e12))
-        print("Avg Throughput: tokens/s: {}".format((1000 / (avg * 1000)) * bs))
diff --git a/examples/inference/benchmark.py b/examples/inference/benchmark.py
deleted file mode 100644
index a20983fd1..000000000
--- a/examples/inference/benchmark.py
+++ /dev/null
@@ -1,167 +0,0 @@
-import argparse
-import os
-import time
-
-import torch
-import torch.distributed as dist
-import transformers
-
-import colossalai
-from colossalai.inference import CaiInferEngine
-from colossalai.testing import clear_cache_before_run, rerun_if_address_is_in_use, spawn
-
-GIGABYTE = 1024**3
-MEGABYTE = 1024 * 1024
-
-
-def data_gen(batch_size: int = 4, seq_len: int = 512):
-    input_ids = torch.randint(10, 30000, (1, seq_len), dtype=torch.int32)
-    attention_mask = torch.ones((1, seq_len), dtype=torch.int32)
-    data = dict(input_ids=input_ids, attention_mask=attention_mask)
-    for k, v in data.items():
-        if torch.is_tensor(v) or "Tensor" in v.__class__.__name__:
-            new_shape = [1] * v.dim()
-            new_shape[0] = batch_size
-            data[k] = v.to("cuda").repeat(*new_shape)
-    return data
-
-
-def print_details_info(timestamps, model_config, args, whole_end2end):
-    log_file_name = f"{args.log_path}/llama-{args.model}{args.dtype}_pp{args.pp_size}_{args.seq_len}_{args.output_len}_bsz{args.batch_size}_mbsz{args.mb_size}.log"
-    os.makedirs(os.path.dirname(log_file_name), exist_ok=True)
-
-    if dist.get_rank() == 0:
-        prefill = []
-        encoder = []
-        end2end = []
-        for timestamp in timestamps:
-            prefill.append(timestamp[1] - timestamp[0])
-            encoder.append(
-                sum(timestamp[i + 1] - timestamp[i] for i in range(1, len(timestamp) - 1)) / (len(timestamp) - 2)
-            )
-            end2end.append(timestamp[-1] - timestamp[0])
-        print(whole_end2end)
-
-        with open(
-            log_file_name,
-            "w+",
-        ) as f:
-            mb_avg_end2end = sum(end2end) / len(end2end)
-            mb_avg_latency = mb_avg_end2end / (args.output_len * args.mb_size)
-            whole_avg_latency = whole_end2end / (args.output_len * args.batch_size)
-            num_layers = getattr(model_config, "num_layers", model_config.num_hidden_layers)
-            num_parameters = num_layers * model_config.hidden_size * model_config.hidden_size * 12 / args.pp_size
-            if args.dtype in ["fp16", "bf16"]:
-                num_bytes = 2
-            else:
-                num_bytes = 4
-
-            f.write(
-                f"llama-{args.model}{args.dtype}_pp{args.pp_size}, input_len:{args.seq_len}, output_len:{args.output_len}, bsz:{args.batch_size}, mbsz:{args.mb_size}\n"
-            )
-            f.write("Average prefill time: {0:8.2f} ms\n".format(sum(prefill) / len(prefill) * 1000))
-            f.write("Average encode time: {0:8.2f} ms\n".format(sum(encoder) / len(encoder) * 1000))
-            f.write("Average micro batch end2end time: {0:8.2f} ms\n".format(mb_avg_end2end * 1000))
-            f.write("Average micro batch Per Token Latency: {0:8.2f} ms\n".format(mb_avg_latency * 1000))
-            f.write("Whole batch end2end time: {0:8.2f} ms\n".format(whole_end2end * 1000))
-            f.write("Whole batch Per Token Latency: {0:8.2f} ms\n".format(whole_avg_latency * 1000))
-            f.write("Throughput: {} tokens/s\n".format((1000 / (whole_avg_latency * 1000))))
-            f.write("flops: {0:8.2f} TFlops/s\n".format(1 / whole_avg_latency * num_parameters * num_bytes / 1e12))
-            f.write("----------------------------------------------------------\n")
-
-    if torch.cuda.is_available():
-        current_device = torch.cuda.current_device()
-
-        # free memory and the total available memory in bytes
-        global_free_memory, total_GPU_memory_occupied = torch.cuda.mem_get_info()
-        memory_allocated = torch.cuda.memory_allocated()
-        max_memory_allocated = torch.cuda.max_memory_allocated()
-        memory_reserved = torch.cuda.memory_reserved()
-        max_memory_reserved = torch.cuda.max_memory_reserved()
-        with open(
-            log_file_name,
-            "a",
-        ) as f:
-            f.write(
-                f"\nCurrently using GPU: {current_device}\n"
-                f"free memory : {global_free_memory / GIGABYTE:.4f} GB,\n"
-                f"total memory: {total_GPU_memory_occupied / GIGABYTE:.4f} GB,\n"
-                f"memory allocated: {memory_allocated / GIGABYTE:.4f} GB,\n"
-                f"Max CUDA memory allocated: {max_memory_allocated / GIGABYTE:.4f} GB,\n"
-                f"memory reserved/cached: {memory_reserved / GIGABYTE:.4f} GB,\n"
-                f"Max CUDA memory reserved/cached: {max_memory_reserved / GIGABYTE:.4f} GB,\n"
-            )
-
-
-def benchmark_inference(args):
-    if args.model == "toy":
-        model = transformers.LlamaForCausalLM(transformers.LlamaConfig(num_hidden_layers=4))
-    elif args.model == "7b":
-        model = transformers.LlamaForCausalLM(
-            transformers.LlamaConfig(
-                hidden_size=4096,
-                intermediate_size=11008,
-                num_attention_heads=32,
-                num_hidden_layers=32,
-                num_key_value_heads=32,
-            )
-        )
-    elif args.model == "13b":
-        model = transformers.LlamaForCausalLM(
-            transformers.LlamaConfig(
-                hidden_size=5120,
-                intermediate_size=13824,
-                num_attention_heads=40,
-                num_hidden_layers=40,
-                num_key_value_heads=40,
-            )
-        )
-    else:
-        raise NotImplementedError
-
-    engine = CaiInferEngine(
-        pp_size=args.pp_size,
-        tp_size=args.tp_size,
-        dtype=args.dtype,
-        micro_batch_size=args.mb_size,
-        model=model,
-        verbose=True,
-        max_batch_size=args.mb_size,
-        max_input_len=args.seq_len,
-        max_output_len=args.output_len,
-    )
-    data = data_gen(args.batch_size, args.seq_len)
-
-    torch.cuda.synchronize()
-    whole_end2end = time.time()
-    output, timestamps = engine.generate(data)
-    torch.cuda.synchronize()
-    whole_end2end = time.time() - whole_end2end
-
-    print_details_info(timestamps, model.config, args, whole_end2end)
-
-
-def hybrid_inference(rank, world_size, port, args):
-    colossalai.launch(config={}, rank=rank, world_size=world_size, host="localhost", port=port, backend="nccl")
-    benchmark_inference(args)
-
-
-@rerun_if_address_is_in_use()
-@clear_cache_before_run()
-def benchmark(args):
-    spawn(hybrid_inference, nprocs=args.tp_size * args.pp_size, args=args)
-
-
-if __name__ == "__main__":
-    parser = argparse.ArgumentParser()
-    parser.add_argument("--model", default="toy", help="the size of model")
-    parser.add_argument("-b", "--batch_size", type=int, default=8, help="batch size")
-    parser.add_argument("-s", "--seq_len", type=int, default=8, help="sequence length")
-    parser.add_argument("--mb_size", type=int, default=1, help="micro_batch_size")
-    parser.add_argument("--pp_size", type=int, default=2, help="pipeline size")
-    parser.add_argument("--tp_size", type=int, default=2, help="pipeline size")
-    parser.add_argument("--output_len", type=int, default=16, help="Output length")
-    parser.add_argument("--log_path", type=str, default="./log", help="where to store the benchmark log")
-    parser.add_argument("--dtype", type=str, default="fp16", help="data type")
-    args = parser.parse_args()
-    benchmark(args)
diff --git a/examples/inference/benchmark_llama.py b/examples/inference/benchmark_llama.py
new file mode 100644
index 000000000..9a26098b3
--- /dev/null
+++ b/examples/inference/benchmark_llama.py
@@ -0,0 +1,168 @@
+import argparse
+import time
+
+import torch
+import torch.distributed as dist
+import transformers
+
+import colossalai
+import colossalai.utils.device as device_utils
+from colossalai.inference import InferenceEngine
+from colossalai.testing import clear_cache_before_run, rerun_if_address_is_in_use, spawn
+from colossalai.utils.device import get_current_device
+
+GIGABYTE = 1024**3
+MEGABYTE = 1024 * 1024
+
+CONFIG_MAP = {
+    "toy": transformers.LlamaConfig(num_hidden_layers=4),
+    "llama-7b": transformers.LlamaConfig(
+        hidden_size=4096,
+        intermediate_size=11008,
+        num_attention_heads=32,
+        num_hidden_layers=32,
+        num_key_value_heads=32,
+        max_position_embeddings=2048,
+    ),
+    "llama-13b": transformers.LlamaConfig(
+        hidden_size=5120,
+        intermediate_size=13824,
+        num_attention_heads=40,
+        num_hidden_layers=40,
+        num_key_value_heads=40,
+        max_position_embeddings=2048,
+    ),
+    "llama2-7b": transformers.LlamaConfig(
+        hidden_size=4096,
+        intermediate_size=11008,
+        num_attention_heads=32,
+        num_hidden_layers=32,
+        num_key_value_heads=32,
+        max_position_embeddings=4096,
+    ),
+    "llama2-13b": transformers.LlamaConfig(
+        hidden_size=5120,
+        intermediate_size=13824,
+        num_attention_heads=40,
+        num_hidden_layers=40,
+        num_key_value_heads=40,
+        max_position_embeddings=4096,
+    ),
+}
+
+
+def data_gen(batch_size: int = 4, seq_len: int = 512):
+    input_ids = torch.randint(10, 30000, (batch_size, seq_len), device=get_current_device())
+    attention_mask = torch.ones_like(input_ids)
+    data = dict(input_ids=input_ids, attention_mask=attention_mask)
+    return data
+
+
+def print_details_info(outputs, model_config, args, whole_end2end):
+    msg: str = ""
+
+    if dist.get_rank() == 0:
+        msg += "-------Perf Summary-------\n"
+        if args.verbose:
+            timestamps = outputs[1]
+            prefill = []
+            encoder = []
+            end2end = []
+            for timestamp in timestamps:
+                prefill.append(timestamp[1] - timestamp[0])
+                encoder.append(
+                    sum(timestamp[i + 1] - timestamp[i] for i in range(1, len(timestamp) - 1)) / (len(timestamp) - 2)
+                )
+                end2end.append(timestamp[-1] - timestamp[0])
+
+            mb_avg_end2end = sum(end2end) / len(end2end)
+            mb_avg_latency = mb_avg_end2end / (args.output_len * args.mb_size)
+
+            msg += f"Average prefill time: {sum(prefill) / len(prefill) * 1000:.2f} ms\n"
+            msg += f"Average encode time: {sum(encoder) / len(encoder) * 1000:.2f} ms\n"
+            msg += f"Average micro batch end2end time: {mb_avg_end2end * 1000:.2f} ms\n"
+            msg += f"Average micro batch per token latency: {mb_avg_latency * 1000:.2f} ms\n"
+
+        whole_avg_latency = whole_end2end / (args.output_len * args.batch_size)
+        num_layers = getattr(model_config, "num_layers", model_config.num_hidden_layers)
+        num_parameters = num_layers * model_config.hidden_size * model_config.hidden_size * 12 / args.pp_size
+        if args.dtype in ["fp16", "bf16"]:
+            num_bytes = 2
+        else:
+            num_bytes = 4
+
+        msg += f"Whole batch end2end time: {whole_end2end * 1000:.2f} ms\n"
+        msg += f"Whole batch per token latency: {whole_avg_latency * 1000:.2f} ms\n"
+        msg += f"Throughput: {args.output_len * args.batch_size / whole_end2end:.2f} tokens/s\n"
+        msg += f"Flops: {num_parameters * num_bytes / whole_avg_latency / 1e12:.2f} TFLOPS\n"
+
+    if torch.cuda.is_available():
+        msg += f"-------Memory Summary Device:{device_utils.current_device()}-------\n"
+        msg += f"Max memory allocated: {device_utils.max_memory_allocated() / GIGABYTE:.2f} GB\n"
+        msg += f"Max memory reserved: {device_utils.max_memory_reserved() / GIGABYTE:.2f} GB\n"
+
+    print(msg)
+
+
+def benchmark_inference(args):
+    config = CONFIG_MAP[args.model]
+    model = transformers.LlamaForCausalLM(config)
+    if dist.get_rank() == 0:
+        print("Model loaded")
+    engine = InferenceEngine(
+        pp_size=args.pp_size,
+        tp_size=args.tp_size,
+        dtype=args.dtype,
+        micro_batch_size=args.mb_size,
+        model=model,
+        verbose=args.verbose,
+        max_batch_size=args.batch_size,
+        max_input_len=args.seq_len,
+        max_output_len=args.output_len,
+    )
+    data = data_gen(args.batch_size, args.seq_len)
+
+    N_WARMUP_STEPS = 2
+
+    for _ in range(N_WARMUP_STEPS):
+        engine.generate(data)
+
+    torch.cuda.synchronize()
+    whole_end2end = time.time()
+    outputs = engine.generate(data)
+    torch.cuda.synchronize()
+    whole_end2end = time.time() - whole_end2end
+
+    print_details_info(outputs, model.config, args, whole_end2end)
+
+
+def hybrid_inference(rank, world_size, port, args):
+    colossalai.launch(config={}, rank=rank, world_size=world_size, host="localhost", port=port, backend="nccl")
+    benchmark_inference(args)
+
+
+@rerun_if_address_is_in_use()
+@clear_cache_before_run()
+def benchmark(args):
+    spawn(hybrid_inference, nprocs=args.tp_size * args.pp_size, args=args)
+
+
+if __name__ == "__main__":
+    parser = argparse.ArgumentParser()
+    parser.add_argument(
+        "-m",
+        "--model",
+        default="toy",
+        help="the size of model",
+        choices=["toy", "llama-7b", "llama-13b", "llama2-7b", "llama2-13b"],
+    )
+    parser.add_argument("-b", "--batch_size", type=int, default=8, help="batch size")
+    parser.add_argument("-s", "--seq_len", type=int, default=8, help="sequence length")
+    parser.add_argument("--mb_size", type=int, default=1, help="micro_batch_size")
+    parser.add_argument("--pp_size", type=int, default=1, help="pipeline size")
+    parser.add_argument("--tp_size", type=int, default=1, help="pipeline size")
+    parser.add_argument("--output_len", type=int, default=128, help="Output length")
+    parser.add_argument("--dtype", type=str, default="fp16", help="data type")
+    parser.add_argument("-v", "--verbose", default=False, action="store_true")
+    args = parser.parse_args()
+    benchmark(args)
diff --git a/examples/inference/build_smoothquant_weight.py b/examples/inference/build_smoothquant_weight.py
index 0cb566886..d60ce1c1d 100644
--- a/examples/inference/build_smoothquant_weight.py
+++ b/examples/inference/build_smoothquant_weight.py
@@ -54,15 +54,6 @@ def main():
 
     model.save_quantized(output_path, model_basename="llama-7b")
 
-    model = SmoothLlamaForCausalLM.from_quantized(output_path, model_basename="llama-7b")
-    model = model.cuda()
-
-    generate_kwargs = dict(max_new_tokens=16, do_sample=False, use_cache=True)
-    input_tokens = tokenizer(["today is "], return_tensors="pt").to("cuda")
-    out = model.generate(**input_tokens, **generate_kwargs)
-    text = tokenizer.batch_decode(out)
-    print("out is:", text)
-
 
 if __name__ == "__main__":
     main()
diff --git a/examples/inference/run_benchmark.sh b/examples/inference/run_benchmark.sh
old mode 100644
new mode 100755
index 79008c7d0..394222ea6
--- a/examples/inference/run_benchmark.sh
+++ b/examples/inference/run_benchmark.sh
@@ -1,65 +1,15 @@
-script_dir=$(cd "$(dirname "$0")" && pwd)
-cd "${script_dir}"
+ROOT=$(realpath $(dirname $0))
+PY_SCRIPT=${ROOT}/benchmark_llama.py
+GPU=$(nvidia-smi -L | head -1 | cut -d' ' -f4 | cut -d'-' -f1)
 
-# toy model, 2tp*2pp 1024, 128
-python ./benchmark.py \
-    --model="toy" \
-    --dtype="fp16" \
-    --batch_size=2 \
-    --seq_len=1024 \
-    --output_len=128 \
-    --mb_size=1 \
-    --pp_size=2 \
-    --tp_size=2
+mkdir -p logs
 
-# 7b, fp16, 2 gpu, 1024, 128
-for BATCH_SIZE in 2 4 8 16; do
-    python ./benchmark.py \
-        --model="7b" \
-        --dtype="fp16" \
-        --batch_size=${BATCH_SIZE} \
-        --seq_len=1024 \
-        --output_len=128 \
-        --mb_size=$((${BATCH_SIZE}/2)) \
-        --pp_size=2 \
-        --tp_size=2
+# benchmark llama2-7b one single GPU
+for bsz in 16 32 64; do
+    python3 ${PY_SCRIPT} -m llama2-7b --tp_size 1 --pp_size 1 -b $bsz -s 256 --output_len 128 | tee logs/${GPU}_${bsz}_256.txt
 done
 
-# 7b, fp16, 2 gpu, 512, 512
-for BATCH_SIZE in 2 4 8 16 32; do
-    python ./benchmark.py \
-        --model="7b" \
-        --dtype="fp16" \
-        --batch_size=${BATCH_SIZE} \
-        --seq_len=512 \
-        --output_len=512 \
-        --mb_size=$((${BATCH_SIZE}/2)) \
-        --pp_size=2 \
-        --tp_size=2
-done
-
-# 7b, fp16, 2 gpu, 1024, 128
-for BATCH_SIZE in 2 4 8; do
-    python ./benchmark.py \
-        --model="13b" \
-        --dtype="fp16" \
-        --batch_size=${BATCH_SIZE} \
-        --seq_len=1024 \
-        --output_len=128 \
-        --mb_size=$((${BATCH_SIZE}/2)) \
-        --pp_size=2 \
-        --tp_size=2
-done
 
-# 13b, fp16, 2 gpu, 512, 512
-for BATCH_SIZE in 2 4 8 16; do
-    python ./benchmark.py \
-        --model="13b" \
-        --dtype="fp16" \
-        --batch_size=${BATCH_SIZE} \
-        --seq_len=512 \
-        --output_len=512 \
-        --mb_size=$((${BATCH_SIZE}/2)) \
-        --pp_size=2 \
-        --tp_size=2
+for bsz in 4 8 16 32 64; do
+    python3 ${PY_SCRIPT} -m llama2-7b --tp_size 1 --pp_size 1 -b $bsz -s 1024 --output_len 128 | tee logs/${GPU}_${bsz}_1024.txt
 done
diff --git a/examples/inference/run_llama_inference.py b/examples/inference/run_llama_inference.py
index 8151518fe..8f85a9363 100644
--- a/examples/inference/run_llama_inference.py
+++ b/examples/inference/run_llama_inference.py
@@ -7,11 +7,17 @@ from transformers import LlamaForCausalLM, LlamaTokenizer
 import colossalai
 from colossalai.inference import InferenceEngine
 from colossalai.testing import spawn
+from colossalai.utils.device import get_current_device
+
+INPUT_TEXTS = [
+    "What is the longest river in the world?",
+    "Explain the difference between process and thread in compouter science.",
+]
 
 
 def run_inference(args):
     llama_model_path = args.model_path
-    llama_tokenize_path = args.tokenizer_path
+    llama_tokenize_path = args.tokenizer_path or args.model_path
 
     max_input_len = args.max_input_len
     max_output_len = args.max_output_len
@@ -22,11 +28,10 @@ def run_inference(args):
     rank = dist.get_rank()
 
     tokenizer = LlamaTokenizer.from_pretrained(llama_tokenize_path, padding_side="left")
-    tokenizer.pad_token_id = tokenizer.unk_token_id
+    tokenizer.pad_token_id = tokenizer.eos_token_id
 
     if args.quant is None:
-        model = LlamaForCausalLM.from_pretrained(llama_model_path, pad_token_id=tokenizer.unk_token_id)
-        model = model.half()
+        model = LlamaForCausalLM.from_pretrained(llama_model_path, pad_token_id=tokenizer.pad_token_id)
     elif args.quant == "gptq":
         from auto_gptq import AutoGPTQForCausalLM
 
@@ -45,18 +50,21 @@ def run_inference(args):
         model=model,
         max_input_len=max_input_len,
         max_output_len=max_output_len,
+        max_batch_size=max_batch_size,
         micro_batch_size=micro_batch_size,
         quant=args.quant,
+        dtype=args.dtype,
     )
 
-    input_tokens = {
-        "input_ids": torch.randint(1, 1000, (max_batch_size, max_input_len), device="cuda"),
-        "attention_mask": torch.ones((max_batch_size, max_input_len), device="cuda"),
-    }
+    inputs = tokenizer(INPUT_TEXTS, return_tensors="pt", padding="longest", max_length=max_input_len, truncation=True)
+    inputs = {k: v.to(get_current_device()) for k, v in inputs.items()}
+    outputs = engine.generate(inputs)
 
-    outputs = engine.generate(input_tokens)
     if rank == 0:
-        print(tokenizer.batch_decode(outputs))
+        output_texts = tokenizer.batch_decode(outputs, skip_special_tokens=True)
+        for input_text, output_text in zip(INPUT_TEXTS, output_texts):
+            print(f"Input: {input_text}")
+            print(f"Output: {output_text}")
 
 
 def run_tp_pipeline_inference(rank, world_size, port, args):
@@ -67,8 +75,8 @@ def run_tp_pipeline_inference(rank, world_size, port, args):
 if __name__ == "__main__":
     parser = argparse.ArgumentParser()
     parser.add_argument("-p", "--model_path", type=str, help="Model path", required=True)
-    parser.add_argument("--tokenizer_path", type=str, help="Tokenizer path", required=True)
-
+    parser.add_argument("-i", "--input", default="What is the longest river in the world?")
+    parser.add_argument("-t", "--tokenizer_path", type=str, help="Tokenizer path", default=None)
     parser.add_argument(
         "-q",
         "--quant",
@@ -78,12 +86,13 @@ if __name__ == "__main__":
         help="quantization type: 'gptq' or 'smoothquant'",
     )
     parser.add_argument("--smoothquant_base_name", type=str, default=None, help="soothquant base name")
-    parser.add_argument("-tp", "--tp_size", type=int, default=2, help="Tensor parallel size")
-    parser.add_argument("-pp", "--pp_size", type=int, default=2, help="Pipeline parallel size")
+    parser.add_argument("--tp_size", type=int, default=1, help="Tensor parallel size")
+    parser.add_argument("--pp_size", type=int, default=1, help="Pipeline parallel size")
     parser.add_argument("-b", "--batch_size", type=int, default=4, help="Maximum batch size")
-    parser.add_argument("--max_input_len", type=int, default=32, help="Maximum input length")
-    parser.add_argument("--max_output_len", type=int, default=16, help="Maximum output length")
+    parser.add_argument("--max_input_len", type=int, default=2048, help="Maximum input length")
+    parser.add_argument("--max_output_len", type=int, default=64, help="Maximum output length")
     parser.add_argument("--micro_batch_size", type=int, default=1, help="Micro batch size")
+    parser.add_argument("--dtype", default="fp16", type=str)
 
     args = parser.parse_args()
     spawn(run_tp_pipeline_inference, nprocs=args.tp_size * args.pp_size, args=args)
diff --git a/requirements/requirements-infer.txt b/requirements/requirements-infer.txt
index 46a6b41bf..f85f9d88e 100644
--- a/requirements/requirements-infer.txt
+++ b/requirements/requirements-infer.txt
@@ -1,6 +1,4 @@
 transformers==4.34.0
-packaging
-ninja
 auto-gptq==0.5.0
 git+https://github.com/ModelTC/lightllm.git@ece7b43f8a6dfa74027adc77c2c176cff28c76c8
 git+https://github.com/Dao-AILab/flash-attention.git@017716451d446e464dde9aca3a3c1ed2209caaa9