diff --git a/experiments/dsv4_h200_sglang_vs_vllm/results/20260708-083346/comparison.md b/experiments/dsv4_h200_sglang_vs_vllm/results/20260708-083346/comparison.md
new file mode 100644
index 0000000..dfc98f0
--- /dev/null
+++ b/experiments/dsv4_h200_sglang_vs_vllm/results/20260708-083346/comparison.md
@@ -0,0 +1,41 @@
+# SGLang vs vLLM on DeepSeek-V4-Flash (H200, TP=8)
+
+## Summary
+
+- Model: `/data/models/DeepSeek-V4-Flash`
+- Hardware: 8x NVIDIA H200 143GB
+- Tensor Parallelism: 8
+- Benchmark client: `sglang.bench_serving`
+- SLO reference: S2 tier (TTFT P95 < 3s, TPOT < 50ms)
+
+## Side-by-side results
+
+| 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 |
+|---|---|---:|---:|---:|---:|---:|---:|---:|---:|---:|---:|---:|---:|
+| c128_i512_o256 | sglang | 128 | 512 | 256 | 27.96 | 3691.88 | 1046.81 | 1048.77 | 19.84 | 30.70 | 78.39 | 4494.67 | ✅ |
+| c128_i512_o256 | vllm | 128 | 512 | 256 | 1.82 | 240.43 | 65775.64 | 68346.91 | 7.51 | 8.88 | 9.95 | 69371.23 | ⚠️ |
+| c1_i131072_o1024 | sglang | 1 | 131072 | 1024 | 0.21 | 117.45 | 610.97 | 623.90 | 7.64 | 7.71 | 7.72 | 7216.79 | ✅ |
+| c1_i131072_o1024 | vllm | 1 | 131072 | 1024 | 0.24 | 133.99 | 549.11 | 565.06 | 6.79 | 6.84 | 6.84 | 6410.99 | ✅ |
+| c1_i200000_o1024 | sglang | 1 | 200000 | 1024 | 0.25 | 109.00 | 619.26 | 619.26 | 7.72 | 7.72 | 7.72 | 3976.45 | ✅ |
+| c1_i200000_o1024 | vllm | 1 | 200000 | 1024 | 0.28 | 121.52 | 608.85 | 608.85 | 6.84 | 6.84 | 6.84 | 3584.28 | ✅ |
+| c1_i32768_o1024 | sglang | 1 | 32768 | 1024 | 0.32 | 107.76 | 1088.23 | 1185.18 | 7.55 | 7.58 | 7.58 | 4928.38 | ✅ |
+| c1_i32768_o1024 | vllm | 1 | 32768 | 1024 | 0.36 | 120.28 | 1007.75 | 1099.08 | 6.70 | 6.76 | 6.76 | 4391.50 | ✅ |
+| c1_i32768_o256 | sglang | 1 | 32768 | 256 | 0.48 | 122.41 | 225.25 | 228.79 | 7.43 | 7.44 | 7.44 | 2126.29 | ✅ |
+| c1_i32768_o256 | vllm | 1 | 32768 | 256 | 0.53 | 135.36 | 319.19 | 332.05 | 6.66 | 6.66 | 6.67 | 2026.78 | ✅ |
+| c1_i4000_o512 | sglang | 1 | 4000 | 512 | 0.43 | 121.90 | 245.14 | 250.72 | 7.50 | 7.58 | 7.59 | 4062.79 | ✅ |
+| c1_i4000_o512 | vllm | 1 | 4000 | 512 | 0.49 | 138.92 | 195.78 | 198.56 | 6.68 | 6.73 | 6.73 | 3604.09 | ✅ |
+| c1_i512_o256 | sglang | 1 | 512 | 256 | 0.77 | 112.74 | 228.17 | 229.05 | 7.45 | 7.47 | 7.62 | 2105.10 | ✅ |
+| c1_i512_o256 | vllm | 1 | 512 | 256 | 0.92 | 133.24 | 188.08 | 196.56 | 6.67 | 6.71 | 6.73 | 1877.61 | ✅ |
+| c1_i65536_o1024 | sglang | 1 | 65536 | 1024 | 0.43 | 97.35 | 1391.18 | 1526.74 | 7.56 | 7.62 | 7.63 | 5333.41 | ✅ |
+| c1_i65536_o1024 | vllm | 1 | 65536 | 1024 | 0.50 | 113.04 | 1199.14 | 1320.28 | 6.11 | 6.66 | 6.67 | 4685.90 | ✅ |
+| c32_i32768_o256 | sglang | 32 | 32768 | 256 | 9.11 | 2331.04 | 894.53 | 897.13 | 11.22 | 11.79 | 12.38 | 3706.48 | ✅ |
+| c32_i32768_o256 | vllm | 32 | 32768 | 256 | 1.03 | 263.21 | 29346.73 | 29758.65 | 7.18 | 7.46 | 7.48 | 31587.45 | ⚠️ |
+| c32_i4000_o512 | sglang | 32 | 4000 | 512 | 4.60 | 1298.23 | 647.63 | 650.43 | 19.83 | 25.78 | 27.20 | 11422.18 | ✅ |
+| c32_i4000_o512 | vllm | 32 | 4000 | 512 | 0.93 | 263.43 | 33396.12 | 33949.08 | 7.20 | 7.61 | 8.33 | 36115.49 | ⚠️ |
+| c32_i512_o256 | sglang | 32 | 512 | 256 | 5.71 | 753.27 | 448.83 | 573.80 | 38.34 | 53.13 | 76.13 | 11783.40 | ✅ |
+| c32_i512_o256 | vllm | 32 | 512 | 256 | 1.81 | 239.27 | 17481.79 | 18082.76 | 7.54 | 9.09 | 9.97 | 19259.08 | ⚠️ |
+
+## Notes
+
+- SLO check uses TTFT P95 and TPOT mean (the same criteria as `scripts/SLO_STANDARDS.md`).
+- A ⚠️ indicates one of the two metrics is out of target; ❌ indicates both are out.
diff --git a/experiments/dsv4_h200_sglang_vs_vllm/results/20260708-083346/sglang/report.md b/experiments/dsv4_h200_sglang_vs_vllm/results/20260708-083346/sglang/report.md
new file mode 100644
index 0000000..3d2745e
--- /dev/null
+++ b/experiments/dsv4_h200_sglang_vs_vllm/results/20260708-083346/sglang/report.md
@@ -0,0 +1,25 @@
+# H200 SGLANG Comparison Benchmark Report
+
+- Result root: `/data/user1/yy/experiments/dsv4_h200_sglang_vs_vllm/results/20260708-083346/sglang`
+- Model: `/data/models/DeepSeek-V4-Flash`
+- Backend: SGLANG (TP=8)
+- Benchmark client: `sglang.bench_serving --backend sglang`
+
+## Results
+
+| Scenario | Phase | Concurrency | Input | Output | Duration(s) | Success | Req/s | In tok/s | Out tok/s | Total tok/s | Mean TTFT(ms) | P95 TTFT(ms) | P99 TTFT(ms) | Mean TPOT(ms) | P95 TPOT(ms) | P99 TPOT(ms) | Mean E2E(ms) | P95 E2E(ms) | P99 E2E(ms) | SLO |
+|---|---:|---:|---:|---:|---:|---:|---:|---:|---:|---:|---:|---:|---:|---:|---:|---:|---:|---:|---:|---:|
+| c128_i512_o256 | phase1 | 128 | 512 | 256 | 4.58 | 128 | 27.96 | 7700.07 | 3691.88 | 11391.95 | 884.51 | 1046.81 | 1048.77 | 19.84 | 30.70 | 78.39 | 3018.50 | 4438.56 | 4494.67 | ✅ |
+| c1_i4000_o512 | phase1 | 1 | 4000 | 512 | 73.90 | 32 | 0.43 | 879.55 | 121.90 | 1001.45 | 206.80 | 245.14 | 250.72 | 7.50 | 7.58 | 7.59 | 2307.73 | 4000.18 | 4062.79 | ✅ |
+| c1_i512_o256 | phase1 | 1 | 512 | 256 | 41.31 | 32 | 0.77 | 197.79 | 112.74 | 310.53 | 213.56 | 228.17 | 229.05 | 7.45 | 7.47 | 7.62 | 1289.17 | 2101.38 | 2105.10 | ✅ |
+| c32_i4000_o512 | phase1 | 32 | 4000 | 512 | 13.92 | 64 | 4.60 | 9658.35 | 1298.23 | 10956.57 | 460.54 | 647.63 | 650.43 | 19.83 | 25.78 | 27.20 | 5948.45 | 10850.62 | 11422.18 | ✅ |
+| c32_i512_o256 | phase1 | 32 | 512 | 256 | 22.44 | 128 | 5.71 | 1571.09 | 753.27 | 2324.36 | 336.61 | 448.83 | 573.80 | 38.34 | 53.13 | 76.13 | 5292.31 | 11043.01 | 11783.40 | ✅ |
+| c1_i131072_o1024 | phase2 | 1 | 131072 | 1024 | 9.64 | 2 | 0.21 | 14292.96 | 117.45 | 14410.41 | 465.44 | 610.97 | 623.90 | 7.64 | 7.71 | 7.72 | 4805.89 | 7019.98 | 7216.79 | ✅ |
+| c1_i200000_o1024 | phase2 | 1 | 200000 | 1024 | 4.00 | 1 | 0.25 | 30489.99 | 109.00 | 30598.99 | 619.26 | 619.26 | 619.26 | 7.72 | 7.72 | 7.72 | 3976.45 | 3976.45 | 3976.45 | ✅ |
+| c1_i32768_o1024 | phase2 | 1 | 32768 | 1024 | 24.78 | 8 | 0.32 | 4856.52 | 107.76 | 4964.28 | 582.17 | 1088.23 | 1185.18 | 7.55 | 7.58 | 7.58 | 3093.22 | 4747.05 | 4928.38 | ✅ |
+| c1_i65536_o1024 | phase2 | 1 | 65536 | 1024 | 9.26 | 4 | 0.43 | 12018.95 | 97.35 | 12116.30 | 627.00 | 1391.18 | 1526.74 | 7.56 | 7.62 | 7.63 | 2307.18 | 4885.48 | 5333.41 | ✅ |
+| c1_i32768_o256 | sharegpt | 1 | 32768 | 256 | 66.92 | 32 | 0.48 | 148.71 | 122.41 | 271.12 | 194.08 | 225.25 | 228.79 | 7.43 | 7.44 | 7.44 | 2089.53 | 2121.84 | 2126.29 | ✅ |
+| c32_i32768_o256 | sharegpt | 32 | 32768 | 256 | 14.06 | 128 | 9.11 | 3273.05 | 2331.04 | 5604.09 | 629.65 | 894.53 | 897.13 | 11.22 | 11.79 | 12.38 | 3490.74 | 3703.17 | 3706.48 | ✅ |
+
+SLO: S2 tier — TTFT P95 < 3000ms, TPOT mean < 50ms. ✅ pass, ⚠️ partial, ❌ fail.
+
diff --git a/experiments/dsv4_h200_sglang_vs_vllm/results/20260708-083346/sglang/results.json b/experiments/dsv4_h200_sglang_vs_vllm/results/20260708-083346/sglang/results.json
new file mode 100644
index 0000000..9fce60b
--- /dev/null
+++ b/experiments/dsv4_h200_sglang_vs_vllm/results/20260708-083346/sglang/results.json
@@ -0,0 +1,646 @@
+{
+  "metadata": {
+    "experiment": "dsv4_h200_sglang_vs_vllm_sglang",
+    "run_id": "20260708-083346",
+    "timestamp": "2026-07-08T08:44:53+00:00",
+    "model": "/data/models/DeepSeek-V4-Flash",
+    "backend": "sglang",
+    "engine": "sglang",
+    "hardware": "8x NVIDIA H200 143GB",
+    "accelerator": "NVIDIA H200",
+    "chip": "nvidia_h200",
+    "script": "experiments/dsv4_h200_sglang_vs_vllm/run_bench.sh",
+    "env": "/data/user1/yy/envs/sglang",
+    "git_commit": "0135a5f",
+    "git_dirty": "dirty",
+    "description": "H200 sglang TP=8 comparison benchmark for DeepSeek-V4-Flash"
+  },
+  "config": {
+    "tp": 8,
+    "cuda_visible_devices": "0,1,2,3,4,5,6,7",
+    "phase1_max_model_len": 32768,
+    "phase2_max_model_len": 210000,
+    "backend": "sglang",
+    "server_start_script": "experiments/dsv4_h200_sglang_vs_vllm/start_sglang.sh",
+    "phase1_server_args": "sglang serve --trust-remote-code --model-path /data/models/DeepSeek-V4-Flash --tp 8 --moe-runner-backend marlin --context-length 32768 --max-running-requests 256 --mem-fraction-static 0.88 --host 0.0.0.0 --port 30006",
+    "phase2_server_args": "sglang serve --trust-remote-code --model-path /data/models/DeepSeek-V4-Flash --tp 8 --moe-runner-backend marlin --context-length 210000 --max-running-requests 2 --mem-fraction-static 0.88 --host 0.0.0.0 --port 30006"
+  },
+  "scenarios": [
+    {
+      "name": "c128_i512_o256",
+      "config": {
+        "phase": "phase1",
+        "concurrency": 128,
+        "input_len": 512,
+        "output_len": 256,
+        "dataset": "random",
+        "num_prompts": 128
+      },
+      "metrics": {
+        "success": 128,
+        "failed": 0,
+        "duration_s": 4.577618950992473,
+        "request_throughput": 27.96213519962126,
+        "input_token_throughput": 7700.072980595705,
+        "output_token_throughput": 3691.875663074995,
+        "total_token_throughput": 11391.9486436707,
+        "total_input_tokens": 35248,
+        "total_output_tokens": 16900,
+        "e2e_ms": {
+          "mean": 3018.4967098989546,
+          "p50": 3125.7881020064815,
+          "p90": 4381.1214389003,
+          "p95": 4438.557288451557,
+          "p99": 4494.668244577188
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+        "ttft_ms": {
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+          "p50": 844.3955024995375,
+          "p90": 1043.815255498339,
+          "p95": 1046.8067594003514,
+          "p99": 1048.7736633588793
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+        "tpot_ms": {
+          "mean": 19.84203271438608,
+          "p50": 16.453881444586266,
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+          "p99": 21.124977292492986
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+      },
+      "slo_status": {
+        "ttft_p95_ok": true,
+        "tpot_mean_ok": true,
+        "overall": "✅"
+      },
+      "raw_file": "/data/user1/yy/experiments/dsv4_h200_sglang_vs_vllm/results/20260708-083346/sglang/raw_outputs/sglang_phase1_0708_128_512_256.jsonl"
+    },
+    {
+      "name": "c1_i4000_o512",
+      "config": {
+        "phase": "phase1",
+        "concurrency": 1,
+        "input_len": 4000,
+        "output_len": 512,
+        "dataset": "random",
+        "num_prompts": 32
+      },
+      "metrics": {
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+        "failed": 0,
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+        "request_throughput": 0.4329962582995431,
+        "input_token_throughput": 879.5507119370906,
+        "output_token_throughput": 121.90197784439323,
+        "total_token_throughput": 1001.4526897814839,
+        "total_input_tokens": 65002,
+        "total_output_tokens": 9009,
+        "e2e_ms": {
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+          "p95": 4000.1761078070554,
+          "p99": 4062.7909016507333
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+          "p95": 245.1369363981939,
+          "p99": 250.71827917563493
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+          "p50": 7.5119136901229195,
+          "p90": 7.523741559697524,
+          "p95": 7.584569910587951,
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+      },
+      "slo_status": {
+        "ttft_p95_ok": true,
+        "tpot_mean_ok": true,
+        "overall": "✅"
+      },
+      "raw_file": "/data/user1/yy/experiments/dsv4_h200_sglang_vs_vllm/results/20260708-083346/sglang/raw_outputs/sglang_phase1_0708_1_4000_512.jsonl"
+    },
+    {
+      "name": "c1_i512_o256",
+      "config": {
+        "phase": "phase1",
+        "concurrency": 1,
+        "input_len": 512,
+        "output_len": 256,
+        "dataset": "random",
+        "num_prompts": 32
+      },
+      "metrics": {
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+        "failed": 0,
+        "duration_s": 41.30654629699711,
+        "request_throughput": 0.7746956080500568,
+        "input_token_throughput": 197.7894724302801,
+        "output_token_throughput": 112.74242020903483,
+        "total_token_throughput": 310.53189263931495,
+        "total_input_tokens": 8170,
+        "total_output_tokens": 4657,
+        "e2e_ms": {
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+        "tpot_ms": {
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+      },
+      "slo_status": {
+        "ttft_p95_ok": true,
+        "tpot_mean_ok": true,
+        "overall": "✅"
+      },
+      "raw_file": "/data/user1/yy/experiments/dsv4_h200_sglang_vs_vllm/results/20260708-083346/sglang/raw_outputs/sglang_phase1_0708_1_512_256.jsonl"
+    },
+    {
+      "name": "c32_i4000_o512",
+      "config": {
+        "phase": "phase1",
+        "concurrency": 32,
+        "input_len": 4000,
+        "output_len": 512,
+        "dataset": "random",
+        "num_prompts": 64
+      },
+      "metrics": {
+        "success": 64,
+        "failed": 0,
+        "duration_s": 13.918221335989074,
+        "request_throughput": 4.598288707660644,
+        "input_token_throughput": 9658.346189135897,
+        "output_token_throughput": 1298.2262290425028,
+        "total_token_throughput": 10956.572418178399,
+        "total_input_tokens": 134427,
+        "total_output_tokens": 18069,
+        "e2e_ms": {
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+          "p95": 647.6346344941702,
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+        }
+      },
+      "slo_status": {
+        "ttft_p95_ok": true,
+        "tpot_mean_ok": true,
+        "overall": "✅"
+      },
+      "raw_file": "/data/user1/yy/experiments/dsv4_h200_sglang_vs_vllm/results/20260708-083346/sglang/raw_outputs/sglang_phase1_0708_32_4000_512.jsonl"
+    },
+    {
+      "name": "c32_i512_o256",
+      "config": {
+        "phase": "phase1",
+        "concurrency": 32,
+        "input_len": 512,
+        "output_len": 256,
+        "dataset": "random",
+        "num_prompts": 128
+      },
+      "metrics": {
+        "success": 128,
+        "failed": 0,
+        "duration_s": 22.435434282000642,
+        "request_throughput": 5.705260633296099,
+        "input_token_throughput": 1571.0861468939133,
+        "output_token_throughput": 753.2726929898756,
+        "total_token_throughput": 2324.3588398837887,
+        "total_input_tokens": 35248,
+        "total_output_tokens": 16900,
+        "e2e_ms": {
+          "mean": 5292.305094242806,
+          "p50": 4425.1284714991925,
+          "p90": 10562.939984499826,
+          "p95": 11043.011823458799,
+          "p99": 11783.398339021078
+        },
+        "ttft_ms": {
+          "mean": 336.61362050031585,
+          "p50": 384.2482510008267,
+          "p90": 442.5148394977441,
+          "p95": 448.8336823080317,
+          "p99": 573.8018302904675
+        },
+        "tpot_ms": {
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+          "p50": 40.33726130479593,
+          "p90": 49.38140258534856,
+          "p95": 53.1272594454486,
+          "p99": 76.12911979381165
+        },
+        "itl_ms": {
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+          "p50": 11.00609399145469,
+          "p90": 186.46158000046853,
+          "p95": 188.6525019945111,
+          "p99": 215.50311118917307
+        }
+      },
+      "slo_status": {
+        "ttft_p95_ok": true,
+        "tpot_mean_ok": true,
+        "overall": "✅"
+      },
+      "raw_file": "/data/user1/yy/experiments/dsv4_h200_sglang_vs_vllm/results/20260708-083346/sglang/raw_outputs/sglang_phase1_0708_32_512_256.jsonl"
+    },
+    {
+      "name": "c1_i131072_o1024",
+      "config": {
+        "phase": "phase2",
+        "concurrency": 1,
+        "input_len": 131072,
+        "output_len": 1024,
+        "dataset": "random",
+        "num_prompts": 2
+      },
+      "metrics": {
+        "success": 2,
+        "failed": 0,
+        "duration_s": 9.637961144995643,
+        "request_throughput": 0.20751276851105258,
+        "input_token_throughput": 14292.960713120023,
+        "output_token_throughput": 117.45222697725575,
+        "total_token_throughput": 14410.41294009728,
+        "total_input_tokens": 137755,
+        "total_output_tokens": 1132,
+        "e2e_ms": {
+          "mean": 4805.888941002195,
+          "p50": 4805.888941002195,
+          "p90": 6773.973971398664,
+          "p95": 7019.984600198221,
+          "p99": 7216.793103237869
+        },
+        "ttft_ms": {
+          "mean": 465.4355255042901,
+          "p50": 465.4355255042901,
+          "p90": 594.7982683050213,
+          "p95": 610.9686111551127,
+          "p99": 623.9048854351859
+        },
+        "tpot_ms": {
+          "mean": 7.6413752635890955,
+          "p50": 7.6413752635890955,
+          "p90": 7.7039553085248675,
+          "p95": 7.71177781414184,
+          "p99": 7.718035818635416
+        },
+        "itl_ms": {
+          "mean": 7.682129423895364,
+          "p50": 7.686511991778389,
+          "p90": 7.886622090882155,
+          "p95": 7.971059103147127,
+          "p99": 8.20142485856195
+        }
+      },
+      "slo_status": {
+        "ttft_p95_ok": true,
+        "tpot_mean_ok": true,
+        "overall": "✅"
+      },
+      "raw_file": "/data/user1/yy/experiments/dsv4_h200_sglang_vs_vllm/results/20260708-083346/sglang/raw_outputs/sglang_phase2_0708_1_131072_1024.jsonl"
+    },
+    {
+      "name": "c1_i200000_o1024",
+      "config": {
+        "phase": "phase2",
+        "concurrency": 1,
+        "input_len": 200000,
+        "output_len": 1024,
+        "dataset": "random",
+        "num_prompts": 1
+      },
+      "metrics": {
+        "success": 1,
+        "failed": 0,
+        "duration_s": 3.999968781005009,
+        "request_throughput": 0.2500019512024156,
+        "input_token_throughput": 30489.9879666954,
+        "output_token_throughput": 109.0008507242532,
+        "total_token_throughput": 30598.988817419653,
+        "total_input_tokens": 121959,
+        "total_output_tokens": 436,
+        "e2e_ms": {
+          "mean": 3976.4531809923938,
+          "p50": 3976.4531809923938,
+          "p90": 3976.4531809923938,
+          "p95": 3976.4531809923938,
+          "p99": 3976.4531809923938
+        },
+        "ttft_ms": {
+          "mean": 619.2648659925908,
+          "p50": 619.2648659925908,
+          "p90": 619.2648659925908,
+          "p95": 619.2648659925908,
+          "p99": 619.2648659925908
+        },
+        "tpot_ms": {
+          "mean": 7.7176742873558695,
+          "p50": 7.7176742873558695,
+          "p90": 7.7176742873558695,
+          "p95": 7.7176742873558695,
+          "p99": 7.7176742873558695
+        },
+        "itl_ms": {
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+        }
+      },
+      "slo_status": {
+        "ttft_p95_ok": true,
+        "tpot_mean_ok": true,
+        "overall": "✅"
+      },
+      "raw_file": "/data/user1/yy/experiments/dsv4_h200_sglang_vs_vllm/results/20260708-083346/sglang/raw_outputs/sglang_phase2_0708_1_200000_1024.jsonl"
+    },
+    {
+      "name": "c1_i32768_o1024",
+      "config": {
+        "phase": "phase2",
+        "concurrency": 1,
+        "input_len": 32768,
+        "output_len": 1024,
+        "dataset": "random",
+        "num_prompts": 8
+      },
+      "metrics": {
+        "success": 8,
+        "failed": 0,
+        "duration_s": 24.777397109995945,
+        "request_throughput": 0.3228749155726515,
+        "input_token_throughput": 4856.523042586037,
+        "output_token_throughput": 107.75950307237244,
+        "total_token_throughput": 4964.28254565841,
+        "total_input_tokens": 120332,
+        "total_output_tokens": 2670,
+        "e2e_ms": {
+          "mean": 3093.2244062478276,
+          "p50": 3533.7771080012317,
+          "p90": 4520.390467393736,
+          "p95": 4747.0502391930495,
+          "p99": 4928.3780566325
+        },
+        "ttft_ms": {
+          "mean": 582.1701634977217,
+          "p50": 558.6632295016898,
+          "p90": 967.0584055958898,
+          "p95": 1088.234538297547,
+          "p99": 1185.175444458873
+        },
+        "tpot_ms": {
+          "mean": 7.551180862107534,
+          "p50": 7.558533887405872,
+          "p90": 7.576012124899167,
+          "p95": 7.579601562424863,
+          "p99": 7.582473112445421
+        },
+        "itl_ms": {
+          "mean": 7.54620997896258,
+          "p50": 7.535525503044482,
+          "p90": 7.818251693970524,
+          "p95": 7.916220599872759,
+          "p99": 8.15036342246458
+        }
+      },
+      "slo_status": {
+        "ttft_p95_ok": true,
+        "tpot_mean_ok": true,
+        "overall": "✅"
+      },
+      "raw_file": "/data/user1/yy/experiments/dsv4_h200_sglang_vs_vllm/results/20260708-083346/sglang/raw_outputs/sglang_phase2_0708_1_32768_1024.jsonl"
+    },
+    {
+      "name": "c1_i65536_o1024",
+      "config": {
+        "phase": "phase2",
+        "concurrency": 1,
+        "input_len": 65536,
+        "output_len": 1024,
+        "dataset": "random",
+        "num_prompts": 4
+      },
+      "metrics": {
+        "success": 4,
+        "failed": 0,
+        "duration_s": 9.25529791599547,
+        "request_throughput": 0.4321848995359727,
+        "input_token_throughput": 12018.954009870517,
+        "output_token_throughput": 97.34964862047785,
+        "total_token_throughput": 12116.303658490995,
+        "total_input_tokens": 111239,
+        "total_output_tokens": 901,
+        "e2e_ms": {
+          "mean": 2307.180852501915,
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+          "p90": 4325.554048095364,
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+        "ttft_ms": {
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+          "p90": 1221.7420409055196,
+          "p95": 1391.1827589574382,
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+        "tpot_ms": {
+          "mean": 7.564658909780665,
+          "p50": 7.585828846471562,
+          "p90": 7.61763043827262,
+          "p95": 7.621828346514722,
+          "p99": 7.625186673108404
+        },
+        "itl_ms": {
+          "mean": 7.49224082721499,
+          "p50": 7.479473002604209,
+          "p90": 7.681275397771969,
+          "p95": 7.754595801816322,
+          "p99": 7.96347564610187
+        }
+      },
+      "slo_status": {
+        "ttft_p95_ok": true,
+        "tpot_mean_ok": true,
+        "overall": "✅"
+      },
+      "raw_file": "/data/user1/yy/experiments/dsv4_h200_sglang_vs_vllm/results/20260708-083346/sglang/raw_outputs/sglang_phase2_0708_1_65536_1024.jsonl"
+    },
+    {
+      "name": "c1_i32768_o256",
+      "config": {
+        "phase": "sharegpt",
+        "concurrency": 1,
+        "input_len": 32768,
+        "output_len": 256,
+        "dataset": "sharegpt",
+        "num_prompts": 32
+      },
+      "metrics": {
+        "success": 32,
+        "failed": 0,
+        "duration_s": 66.9215779669903,
+        "request_throughput": 0.4781716297213479,
+        "input_token_throughput": 148.7113768433392,
+        "output_token_throughput": 122.41193720866507,
+        "total_token_throughput": 271.1233140520043,
+        "total_input_tokens": 9952,
+        "total_output_tokens": 8192,
+        "e2e_ms": {
+          "mean": 2089.52630365593,
+          "p50": 2085.8885635025217,
+          "p90": 2120.287249701505,
+          "p95": 2121.837336999306,
+          "p99": 2126.285889654391
+        },
+        "ttft_ms": {
+          "mean": 194.07644296870785,
+          "p50": 188.67110900464468,
+          "p90": 223.09383450337918,
+          "p95": 225.2502156974515,
+          "p99": 228.79413440998178
+        },
+        "tpot_ms": {
+          "mean": 7.433136708577342,
+          "p50": 7.432712123509012,
+          "p90": 7.441393502750525,
+          "p95": 7.442859282766186,
+          "p99": 7.444249214380797
+        },
+        "itl_ms": {
+          "mean": 7.433842794214755,
+          "p50": 7.431341000483371,
+          "p90": 7.5934758060611784,
+          "p95": 7.654351103701629,
+          "p99": 7.860458772629499
+        }
+      },
+      "slo_status": {
+        "ttft_p95_ok": true,
+        "tpot_mean_ok": true,
+        "overall": "✅"
+      },
+      "raw_file": "/data/user1/yy/experiments/dsv4_h200_sglang_vs_vllm/results/20260708-083346/sglang/raw_outputs/sglang_sharegpt_0708_1_32768_256.jsonl"
+    },
+    {
+      "name": "c32_i32768_o256",
+      "config": {
+        "phase": "sharegpt",
+        "concurrency": 32,
+        "input_len": 32768,
+        "output_len": 256,
+        "dataset": "sharegpt",
+        "num_prompts": 128
+      },
+      "metrics": {
+        "success": 128,
+        "failed": 0,
+        "duration_s": 14.057225968994317,
+        "request_throughput": 9.105637220481944,
+        "input_token_throughput": 3273.0497540185484,
+        "output_token_throughput": 2331.0431284433776,
+        "total_token_throughput": 5604.092882461926,
+        "total_input_tokens": 46010,
+        "total_output_tokens": 32768,
+        "e2e_ms": {
+          "mean": 3490.736479040038,
+          "p50": 3548.8332320019254,
+          "p90": 3701.91772600665,
+          "p95": 3703.1692250500782,
+          "p99": 3706.4754708172404
+        },
+        "ttft_ms": {
+          "mean": 629.6461200562362,
+          "p50": 699.2854104973958,
+          "p90": 809.4456622115104,
+          "p95": 894.5322211977327,
+          "p99": 897.1345172059955
+        },
+        "tpot_ms": {
+          "mean": 11.21996219209334,
+          "p50": 10.98478311568946,
+          "p90": 11.782473441545495,
+          "p95": 11.79308803883032,
+          "p99": 12.381156532274785
+        },
+        "itl_ms": {
+          "mean": 11.221238664603872,
+          "p50": 10.92621900170343,
+          "p90": 11.17239399900427,
+          "p95": 11.247147751419106,
+          "p99": 12.367407945566937
+        }
+      },
+      "slo_status": {
+        "ttft_p95_ok": true,
+        "tpot_mean_ok": true,
+        "overall": "✅"
+      },
+      "raw_file": "/data/user1/yy/experiments/dsv4_h200_sglang_vs_vllm/results/20260708-083346/sglang/raw_outputs/sglang_sharegpt_0708_32_32768_256.jsonl"
+    }
+  ]
+}
\ No newline at end of file
diff --git a/experiments/dsv4_h200_sglang_vs_vllm/results/20260708-083346/vllm/report.md b/experiments/dsv4_h200_sglang_vs_vllm/results/20260708-083346/vllm/report.md
new file mode 100644
index 0000000..a7b672d
--- /dev/null
+++ b/experiments/dsv4_h200_sglang_vs_vllm/results/20260708-083346/vllm/report.md
@@ -0,0 +1,25 @@
+# H200 VLLM Comparison Benchmark Report
+
+- Result root: `/data/user1/yy/experiments/dsv4_h200_sglang_vs_vllm/results/20260708-083346/vllm`
+- Model: `/data/models/DeepSeek-V4-Flash`
+- Backend: VLLM (TP=8)
+- Benchmark client: `sglang.bench_serving --backend vllm`
+
+## Results
+
+| Scenario | Phase | Concurrency | Input | Output | Duration(s) | Success | Req/s | In tok/s | Out tok/s | Total tok/s | Mean TTFT(ms) | P95 TTFT(ms) | P99 TTFT(ms) | Mean TPOT(ms) | P95 TPOT(ms) | P99 TPOT(ms) | Mean E2E(ms) | P95 E2E(ms) | P99 E2E(ms) | SLO |
+|---|---:|---:|---:|---:|---:|---:|---:|---:|---:|---:|---:|---:|---:|---:|---:|---:|---:|---:|---:|---:|
+| c128_i512_o256 | phase1 | 128 | 512 | 256 | 70.29 | 128 | 1.82 | 501.46 | 240.43 | 741.88 | 34320.42 | 65775.64 | 68346.91 | 7.51 | 8.88 | 9.95 | 35303.54 | 66450.82 | 69371.23 | ⚠️ |
+| c1_i4000_o512 | phase1 | 1 | 4000 | 512 | 64.85 | 32 | 0.49 | 1002.32 | 138.92 | 1141.24 | 147.94 | 195.78 | 198.56 | 6.68 | 6.73 | 6.73 | 2025.72 | 3528.12 | 3604.09 | ✅ |
+| c1_i512_o256 | phase1 | 1 | 512 | 256 | 34.95 | 32 | 0.92 | 233.76 | 133.24 | 367.00 | 128.49 | 188.08 | 196.56 | 6.67 | 6.71 | 6.73 | 1091.23 | 1847.17 | 1877.61 | ✅ |
+| c32_i4000_o512 | phase1 | 32 | 4000 | 512 | 68.59 | 64 | 0.93 | 1959.81 | 263.43 | 2223.24 | 23950.97 | 33396.12 | 33949.08 | 7.20 | 7.61 | 8.33 | 25978.04 | 35750.60 | 36115.49 | ⚠️ |
+| c32_i512_o256 | phase1 | 32 | 512 | 256 | 70.63 | 128 | 1.81 | 499.03 | 239.27 | 738.30 | 14403.12 | 17481.79 | 18082.76 | 7.54 | 9.09 | 9.97 | 15389.16 | 18637.78 | 19259.08 | ⚠️ |
+| c1_i131072_o1024 | phase2 | 1 | 131072 | 1024 | 8.45 | 2 | 0.24 | 16305.61 | 133.99 | 16439.60 | 369.70 | 549.11 | 565.06 | 6.79 | 6.84 | 6.84 | 4222.08 | 6232.30 | 6410.99 | ✅ |
+| c1_i200000_o1024 | phase2 | 1 | 200000 | 1024 | 3.59 | 1 | 0.28 | 33993.26 | 121.52 | 34114.79 | 608.85 | 608.85 | 608.85 | 6.84 | 6.84 | 6.84 | 3584.28 | 3584.28 | 3584.28 | ✅ |
+| c1_i32768_o1024 | phase2 | 1 | 32768 | 1024 | 22.20 | 8 | 0.36 | 5420.68 | 120.28 | 5540.95 | 537.39 | 1007.75 | 1099.08 | 6.70 | 6.76 | 6.76 | 2773.61 | 4240.33 | 4391.50 | ✅ |
+| c1_i65536_o1024 | phase2 | 1 | 65536 | 1024 | 7.97 | 4 | 0.50 | 13956.46 | 113.04 | 14069.51 | 512.79 | 1199.14 | 1320.28 | 6.11 | 6.66 | 6.67 | 1990.96 | 4285.04 | 4685.90 | ✅ |
+| c1_i32768_o256 | sharegpt | 1 | 32768 | 256 | 60.52 | 32 | 0.53 | 164.44 | 135.36 | 299.80 | 192.81 | 319.19 | 332.05 | 6.66 | 6.66 | 6.67 | 1890.26 | 2015.91 | 2026.78 | ✅ |
+| c32_i32768_o256 | sharegpt | 32 | 32768 | 256 | 124.49 | 128 | 1.03 | 369.58 | 263.21 | 632.79 | 25671.36 | 29346.73 | 29758.65 | 7.18 | 7.46 | 7.48 | 27502.28 | 31173.56 | 31587.45 | ⚠️ |
+
+SLO: S2 tier — TTFT P95 < 3000ms, TPOT mean < 50ms. ✅ pass, ⚠️ partial, ❌ fail.
+
diff --git a/experiments/dsv4_h200_sglang_vs_vllm/results/20260708-083346/vllm/results.json b/experiments/dsv4_h200_sglang_vs_vllm/results/20260708-083346/vllm/results.json
new file mode 100644
index 0000000..aecd84c
--- /dev/null
+++ b/experiments/dsv4_h200_sglang_vs_vllm/results/20260708-083346/vllm/results.json
@@ -0,0 +1,646 @@
+{
+  "metadata": {
+    "experiment": "dsv4_h200_sglang_vs_vllm_vllm",
+    "run_id": "20260708-083346",
+    "timestamp": "2026-07-08T08:44:53+00:00",
+    "model": "/data/models/DeepSeek-V4-Flash",
+    "backend": "vllm",
+    "engine": "vllm",
+    "hardware": "8x NVIDIA H200 143GB",
+    "accelerator": "NVIDIA H200",
+    "chip": "nvidia_h200",
+    "script": "experiments/dsv4_h200_sglang_vs_vllm/run_bench.sh",
+    "env": "/data/user1/yy/envs/vllm",
+    "git_commit": "0135a5f",
+    "git_dirty": "dirty",
+    "description": "H200 vllm TP=8 comparison benchmark for DeepSeek-V4-Flash"
+  },
+  "config": {
+    "tp": 8,
+    "cuda_visible_devices": "0,1,2,3,4,5,6,7",
+    "phase1_max_model_len": 32768,
+    "phase2_max_model_len": 210000,
+    "backend": "vllm",
+    "server_start_script": "experiments/dsv4_h200_sglang_vs_vllm/start_vllm.sh",
+    "phase1_server_args": "vllm serve /data/models/DeepSeek-V4-Flash --trust-remote-code --tensor-parallel-size 8 --kv-cache-dtype fp8 --max-model-len 32768 --max-num-seqs 256 --block-size 256 --gpu-memory-utilization 0.90 --tokenizer-mode deepseek_v4 --reasoning-parser deepseek_v4 --no-disable-hybrid-kv-cache-manager --disable-uvicorn-access-log --port 30005",
+    "phase2_server_args": "vllm serve /data/models/DeepSeek-V4-Flash --trust-remote-code --tensor-parallel-size 8 --kv-cache-dtype fp8 --max-model-len 210000 --max-num-seqs 2 --block-size 256 --gpu-memory-utilization 0.90 --tokenizer-mode deepseek_v4 --reasoning-parser deepseek_v4 --no-disable-hybrid-kv-cache-manager --disable-uvicorn-access-log --port 30005"
+  },
+  "scenarios": [
+    {
+      "name": "c128_i512_o256",
+      "config": {
+        "phase": "phase1",
+        "concurrency": 128,
+        "input_len": 512,
+        "output_len": 256,
+        "dataset": "random",
+        "num_prompts": 128
+      },
+      "metrics": {
+        "success": 128,
+        "failed": 0,
+        "duration_s": 70.29131372000847,
+        "request_throughput": 1.8209931387804565,
+        "input_token_throughput": 501.4559855916682,
+        "output_token_throughput": 240.42800035460715,
+        "total_token_throughput": 741.8839859462754,
+        "total_input_tokens": 35248,
+        "total_output_tokens": 16900,
+        "e2e_ms": {
+          "mean": 35303.543292343646,
+          "p50": 35317.00481100415,
+          "p90": 62426.622139496605,
+          "p95": 66450.8159798068,
+          "p99": 69371.2297050588
+        },
+        "ttft_ms": {
+          "mean": 34320.41640907778,
+          "p50": 34523.768147002556,
+          "p90": 61465.390575592755,
+          "p95": 65775.64489539945,
+          "p99": 68346.90796818773
+        },
+        "tpot_ms": {
+          "mean": 7.510403795740832,
+          "p50": 7.2786697395865,
+          "p90": 8.519100261819153,
+          "p95": 8.883510504525162,
+          "p99": 9.947404425221317
+        },
+        "itl_ms": {
+          "mean": 7.5049212809090236,
+          "p50": 6.796126006520353,
+          "p90": 6.991922602173872,
+          "p95": 7.084895302250516,
+          "p99": 8.646592354052709
+        }
+      },
+      "slo_status": {
+        "ttft_p95_ok": false,
+        "tpot_mean_ok": true,
+        "overall": "⚠️"
+      },
+      "raw_file": "/data/user1/yy/experiments/dsv4_h200_sglang_vs_vllm/results/20260708-083346/vllm/raw_outputs/vllm_phase1_0708_128_512_256.jsonl"
+    },
+    {
+      "name": "c1_i4000_o512",
+      "config": {
+        "phase": "phase1",
+        "concurrency": 1,
+        "input_len": 4000,
+        "output_len": 512,
+        "dataset": "random",
+        "num_prompts": 32
+      },
+      "metrics": {
+        "success": 32,
+        "failed": 0,
+        "duration_s": 64.85143358699861,
+        "request_throughput": 0.49343550681993475,
+        "input_token_throughput": 1002.3217129471687,
+        "output_token_throughput": 138.91751502939977,
+        "total_token_throughput": 1141.2392279765686,
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+    },
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+    },
+    {
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+        "output_len": 1024,
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+    },
+    {
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+        "concurrency": 1,
+        "input_len": 32768,
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+        "dataset": "random",
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+        "overall": "✅"
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+      "raw_file": "/data/user1/yy/experiments/dsv4_h200_sglang_vs_vllm/results/20260708-083346/vllm/raw_outputs/vllm_phase2_0708_1_32768_1024.jsonl"
+    },
+    {
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+        "output_len": 1024,
+        "dataset": "random",
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+      },
+      "raw_file": "/data/user1/yy/experiments/dsv4_h200_sglang_vs_vllm/results/20260708-083346/vllm/raw_outputs/vllm_phase2_0708_1_65536_1024.jsonl"
+    },
+    {
+      "name": "c1_i32768_o256",
+      "config": {
+        "phase": "sharegpt",
+        "concurrency": 1,
+        "input_len": 32768,
+        "output_len": 256,
+        "dataset": "sharegpt",
+        "num_prompts": 32
+      },
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+        "input_token_throughput": 164.43884687249934,
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+        "total_token_throughput": 299.7968687353927,
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+        "e2e_ms": {
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+      },
+      "slo_status": {
+        "ttft_p95_ok": true,
+        "tpot_mean_ok": true,
+        "overall": "✅"
+      },
+      "raw_file": "/data/user1/yy/experiments/dsv4_h200_sglang_vs_vllm/results/20260708-083346/vllm/raw_outputs/vllm_sharegpt_0708_1_32768_256.jsonl"
+    },
+    {
+      "name": "c32_i32768_o256",
+      "config": {
+        "phase": "sharegpt",
+        "concurrency": 32,
+        "input_len": 32768,
+        "output_len": 256,
+        "dataset": "sharegpt",
+        "num_prompts": 128
+      },
+      "metrics": {
+        "success": 128,
+        "failed": 0,
+        "duration_s": 124.49392829900899,
+        "request_throughput": 1.0281625919343644,
+        "input_token_throughput": 369.5762566789071,
+        "output_token_throughput": 263.2096235351973,
+        "total_token_throughput": 632.7858802141044,
+        "total_input_tokens": 46010,
+        "total_output_tokens": 32768,
+        "e2e_ms": {
+          "mean": 27502.27682496768,
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+        "ttft_ms": {
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+          "p99": 29758.65151028571
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+        "tpot_ms": {
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+          "p50": 7.160704684307953,
+          "p90": 7.288568628234012,
+          "p95": 7.456718741379126,
+          "p99": 7.484840608305212
+        },
+        "itl_ms": {
+          "mean": 7.191130708828689,
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+          "p90": 6.969844806008041,
+          "p95": 7.025835799868219,
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+      },
+      "slo_status": {
+        "ttft_p95_ok": false,
+        "tpot_mean_ok": true,
+        "overall": "⚠️"
+      },
+      "raw_file": "/data/user1/yy/experiments/dsv4_h200_sglang_vs_vllm/results/20260708-083346/vllm/raw_outputs/vllm_sharegpt_0708_32_32768_256.jsonl"
+    }
+  ]
+}
\ No newline at end of file
diff --git a/experiments/dsv4_h200_sglang_vs_vllm/run_bench.sh b/experiments/dsv4_h200_sglang_vs_vllm/run_bench.sh
index e69764f..56d738d 100755
--- a/experiments/dsv4_h200_sglang_vs_vllm/run_bench.sh
+++ b/experiments/dsv4_h200_sglang_vs_vllm/run_bench.sh
@@ -308,27 +308,19 @@ write_backend_metadata() {
     "H200 ${backend} TP=8 comparison benchmark for DeepSeek-V4-Flash"
 
   # Embed config and server args.
-  "${VENV_CLIENT}/bin/python" - "$meta_json" "$backend" "$phase1_args" "$phase2_args" <<'PY'
-import json
-import sys
-
-path, backend, phase1_args, phase2_args = sys.argv[1], sys.argv[2], sys.argv[3], sys.argv[4]
-with open(path, "r", encoding="utf-8") as f:
-    data = json.load(f)
-
-data["config"] = {
-    "tp": 8,
-    "cuda_visible_devices": "0,1,2,3,4,5,6,7",
-    "phase1_max_model_len": 32768,
-    "phase2_max_model_len": 210000,
-    "backend": backend,
-    "server_start_script": f"experiments/dsv4_h200_sglang_vs_vllm/start_{backend}.sh",
-    "phase1_server_args": phase1_args,
-    "phase2_server_args": phase2_args,
-}
-with open(path, "w", encoding="utf-8") as f:
-    json.dump(data, f, indent=2, ensure_ascii=False)
-PY
+  jq --arg backend "$backend" \
+     --arg phase1_args "$phase1_args" \
+     --arg phase2_args "$phase2_args" \
+     '.config = {
+        "tp": 8,
+        "cuda_visible_devices": "0,1,2,3,4,5,6,7",
+        "phase1_max_model_len": 32768,
+        "phase2_max_model_len": 210000,
+        "backend": $backend,
+        "server_start_script": "experiments/dsv4_h200_sglang_vs_vllm/start_\($backend).sh",
+        "phase1_server_args": $phase1_args,
+        "phase2_server_args": $phase2_args
+      }' "$meta_json" > "${meta_json}.tmp" && mv "${meta_json}.tmp" "$meta_json"
 }
 
 # ---------------------------------------------------------------------------