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
86 lines
3.3 KiB
Python
Executable File
86 lines
3.3 KiB
Python
Executable File
#!/usr/bin/env python3
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"""Generate a side-by-side comparison of SGLang and vLLM results.
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Usage:
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python3 compare.py --sglang <sglang_result_root> --vllm <vllm_result_root> \
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[--output comparison.md]
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"""
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import argparse
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import json
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from collections import defaultdict
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from pathlib import Path
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def load_result(result_root: Path) -> dict:
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path = result_root / "results.json"
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with open(path, "r", encoding="utf-8") as f:
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return json.load(f)
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def slo_status(ttft_p95_ms: float, tpot_mean_ms: float) -> str:
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# S2 tier targets from scripts/SLO_STANDARDS.md.
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ttft_ok = ttft_p95_ms < 3000.0
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tpot_ok = tpot_mean_ms < 50.0
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if ttft_ok and tpot_ok:
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return "✅"
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if ttft_ok or tpot_ok:
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return "⚠️"
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return "❌"
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def main():
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parser = argparse.ArgumentParser()
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parser.add_argument("--sglang", type=Path, required=True)
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parser.add_argument("--vllm", type=Path, required=True)
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parser.add_argument("-o", "--output", type=Path, default=Path("comparison.md"))
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args = parser.parse_args()
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sglang_data = load_result(args.sglang)
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vllm_data = load_result(args.vllm)
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by_scenario = defaultdict(dict)
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for data in (sglang_data, vllm_data):
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backend = data["metadata"]["engine"]
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for s in data.get("scenarios", []):
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key = s["name"]
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by_scenario[key][backend] = s
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with open(args.output, "w", encoding="utf-8") as f:
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f.write("# SGLang vs vLLM on DeepSeek-V4-Flash (H200, TP=8)\n\n")
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f.write("## Summary\n\n")
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f.write("- Model: `/data/models/DeepSeek-V4-Flash`\n")
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f.write("- Hardware: 8x NVIDIA H200 143GB\n")
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f.write("- Tensor Parallelism: 8\n")
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f.write("- Benchmark client: `sglang.bench_serving`\n")
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f.write("- SLO reference: S2 tier (TTFT P95 < 3s, TPOT < 50ms)\n\n")
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f.write("## Side-by-side results\n\n")
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f.write("| Scenario | Backend | Conc | Input | Output | Req/s | OutTok/s | TTFT P95(ms) | TTFT P99(ms) | TPOT Mean(ms) | TPOT P95(ms) | TPOT P99(ms) | E2E P99(ms) | SLO |\n")
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f.write("|---|---|---:|---:|---:|---:|---:|---:|---:|---:|---:|---:|---:|---:|\n")
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for scenario_name in sorted(by_scenario.keys()):
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for backend in ("sglang", "vllm"):
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s = by_scenario[scenario_name].get(backend)
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if s is None:
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continue
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cfg = s["config"]
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m = s["metrics"]
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status = slo_status(m["ttft_ms"]["p95"], m["tpot_ms"]["mean"])
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f.write(
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f"| {scenario_name} | {backend} | {cfg['concurrency']} | {cfg['input_len']} | {cfg['output_len']} | "
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f"{m['request_throughput']:.2f} | {m['output_token_throughput']:.2f} | "
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f"{m['ttft_ms']['p95']:.2f} | {m['ttft_ms']['p99']:.2f} | "
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f"{m['tpot_ms']['mean']:.2f} | {m['tpot_ms']['p95']:.2f} | {m['tpot_ms']['p99']:.2f} | "
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f"{m['e2e_ms']['p99']:.2f} | {status} |\n"
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)
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f.write("\n## Notes\n\n")
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f.write("- SLO check uses TTFT P95 and TPOT mean (the same criteria as `scripts/SLO_STANDARDS.md`).\n")
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f.write("- A ⚠️ indicates one of the two metrics is out of target; ❌ indicates both are out.\n")
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print(f"Wrote comparison to {args.output}")
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if __name__ == "__main__":
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main()
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