68 lines
2.4 KiB
Python
68 lines
2.4 KiB
Python
import os
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import time
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from random import randint, seed
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from nanovllm import LLM, SamplingParams
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def bench_decode(llm, num_seqs, input_len, max_output_len):
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"""Benchmark decode performance (original test)"""
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seed(0)
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prompt_token_ids = [[randint(0, 10000) for _ in range(randint(100, input_len))] for _ in range(num_seqs)]
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sampling_params = [SamplingParams(temperature=0.6, ignore_eos=True, max_tokens=randint(100, max_output_len)) for _ in range(num_seqs)]
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t = time.time()
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llm.generate(prompt_token_ids, sampling_params, use_tqdm=False)
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t = time.time() - t
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total_output_tokens = sum(sp.max_tokens for sp in sampling_params)
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throughput = total_output_tokens / t
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print(f"[Decode] Output: {total_output_tokens}tok, Time: {t:.2f}s, Throughput: {throughput:.2f}tok/s")
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def bench_prefill(llm, num_seqs, input_len):
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"""Benchmark prefill performance"""
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seed(0)
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# Fixed length input, minimal output to focus on prefill
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prompt_token_ids = [[randint(0, 10000) for _ in range(input_len)] for _ in range(num_seqs)]
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sampling_params = SamplingParams(temperature=0.6, ignore_eos=True, max_tokens=1)
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t = time.time()
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llm.generate(prompt_token_ids, sampling_params, use_tqdm=False)
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t = time.time() - t
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total_input_tokens = num_seqs * input_len
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throughput = total_input_tokens / t
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print(f"[Prefill] Input: {total_input_tokens}tok ({num_seqs}x{input_len}), Time: {t:.2f}s, Throughput: {throughput:.2f}tok/s")
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def main():
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path = os.path.expanduser("~/models/Qwen3-4B-Instruct-2507/")
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llm = LLM(
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path,
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enforce_eager=False,
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max_model_len=256 * 1024,
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max_num_batched_tokens=256 * 1024,
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enable_cpu_offload=True,
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num_gpu_blocks=120,
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num_prefetch_blocks=4,
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)
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# Warmup
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llm.generate(["Benchmark: "], SamplingParams())
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print("=" * 60)
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print("Prefill Benchmark (CPU Offload)")
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print("=" * 60)
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# bench_prefill(llm, num_seqs=1, input_len=1024)
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# bench_prefill(llm, num_seqs=1, input_len=2048)
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# bench_prefill(llm, num_seqs=1, input_len=4096)
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bench_prefill(llm, num_seqs=1, input_len=128 * 1024)
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print("=" * 60)
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print("Decode Benchmark (CPU Offload)")
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print("=" * 60)
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bench_decode(llm, num_seqs=1, input_len=128 * 1024, max_output_len=128)
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# bench_decode(llm, num_seqs=1, input_len=2048, max_output_len=128)
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if __name__ == "__main__":
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main()
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