e6d9e99b6f
- New experiments/dsv4_h200_sglang_vs_vllm/ with TP=8 on all 8 H200 cards - Phase1 short-context throughput + Phase2 long context up to 200k - Unified scenario matrix, warmup, parsing, and side-by-side comparison report - H200 SGLang vs vLLM entry added to root README
73 lines
2.2 KiB
Markdown
73 lines
2.2 KiB
Markdown
# DSV4 H200 SGLang vs vLLM 对比实验
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在 8x NVIDIA H200 上，用统一控制变量对比 SGLang 与 vLLM serving DeepSeek-V4-Flash。
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## 设计原则
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- 两个 backend 都使用 **TP=8**，绑定全部 8 张卡。
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- 压测客户端统一使用 `sglang.bench_serving`。
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- 场景矩阵、并发、输入/输出长度、请求数对两个 backend 完全一致。
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- 每个 phase 启动 server 后先做 warmup，再跑正式压测。
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- 短上下文和长上下文分阶段启动 server，避免 `max-model-len` / `max-num-seqs` 显存冲突。
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## 场景矩阵
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### Phase 1：短上下文吞吐（max_model_len=32k）
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| Concurrency | Input | Output | Num prompts |
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|---:|---:|---:|---:|
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| 1 | 512 | 256 | 32 |
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| 32 | 512 | 256 | 128 |
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| 128 | 512 | 256 | 128 |
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| 1 | 4000 | 512 | 32 |
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| 32 | 4000 | 512 | 64 |
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### Phase 2：长上下文（max_model_len=210k）
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| Concurrency | Input | Output | Num prompts |
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|---:|---:|---:|---:|
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| 1 | 32768 | 1024 | 8 |
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| 1 | 65536 | 1024 | 4 |
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| 1 | 131072 | 1024 | 2 |
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| 1 | 200000 | 1024 | 1 |
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## 快速运行
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```bash
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bash experiments/dsv4_h200_sglang_vs_vllm/run_bench.sh
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```
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结果保存在 `experiments/dsv4_h200_sglang_vs_vllm/results/<RUN_ID>/`：
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```
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results/<RUN_ID>/
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├── sglang/
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│ ├── results.json
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│ ├── report.md
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│ └── raw_outputs/ # gitignored
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├── vllm/
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│ ├── results.json
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│ ├── report.md
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│ └── raw_outputs/ # gitignored
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├── comparison.md
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└── logs/
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```
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## 文件说明
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| 文件 | 作用 |
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|---|---|
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| `config.env` | 公共配置：模型路径、端口、场景矩阵、虚拟环境 |
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| `start_sglang.sh` | 按 phase 启动 SGLang server |
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| `start_vllm.sh` | 按 phase 启动 vLLM server |
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| `run_bench.sh` | 总 orchestrator：跑 SGLang → 跑 vLLM → 生成对比报告 |
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| `warmup.py` | 用 `sglang.bench_serving` 发送少量预热请求 |
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| `parse_backend.py` | 解析单个 backend 的 raw jsonl 为 `results.json` + `report.md` |
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| `compare.py` | 读取两个 backend 的 `results.json`，生成 `comparison.md` |
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## 环境
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- SGLM server: `/data/user1/yy/envs/sglang`
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- vLLM server: `/data/user1/yy/envs/vllm`
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- Benchmark client: `/data/user1/yy/envs/sglang`（统一用该环境的 `sglang.bench_serving`）
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