NVIDIA A100 GPU üzerinde GPT-OSS-120B işlem hacmi optimizasyonu

Sonuç

A100 GPU üzerinde GPT-OSS-120B işlem hacmini optimize etmek için önerilen yapılandırma:

Model sunum komutu

vllm serve openai/gpt-oss-120b --max-model-len 32768 --async-scheduling --max-num-batched-tokens 4096

Optimizasyon öncesi ve sonrası benchmark sonuçlarının karşılaştırması:

Benchmark senaryosu	temel yapılandırma (optimizasyonsuz vLLM)	Optimize edilmiş
ShareGPT	Toplam TPS: 4768.75 Ortalama TPOT(ms): 97.57	Toplam TPS: 5055.82 (+6.0%) Ortalama TPOT(ms): 94.55
Kısa istem	Toplam TPS: 9353.12 Ortalama TPOT(ms): 182.75	Toplam TPS: 10785.60 (+15.3%) Ortalama TPOT(ms): 301.66
Orta uzunlukta istem	Toplam TPS: 8456.65 Ortalama TPOT(ms): 131.94	Toplam TPS: 9249.89 (+9.4%) Ortalama TPOT(ms): 117.85
Uzun istem	Toplam TPS: 7671.00 Ortalama TPOT(ms): 112.18	Toplam TPS: 8468.21 (+10.4%) Ortalama TPOT(ms): 99.77
Çok uzun istem	Toplam TPS: 4337.21 Ortalama TPOT(ms): 224.58	Toplam TPS: 4605.91 (+6.2%) Ortalama TPOT(ms): 201.61

Not

Benchmark testlerimiz olası tüm optimizasyon birleşimlerini kapsamaz. Örneğin, varsayılan yapılandırmasında en iyi performansı gösteren çıkarım motorunu sonraki ayarlamalar için başlangıç noktası olarak seçeriz. Bu eleme yaklaşımı yerel bir optimum verir; bu, genel optimum olmayabilir.
En büyük toplu iş boyutu, zamanlama yapılandırması, genişletilmiş KV önbelleği, CUDA graph, Torch Compile gibi belirli kullanım senaryolarına bağlı başka optimizasyonlar da vardır. Bu belgedeki sonuçlar, daha hedefli optimizasyonlar için başlangıç noktası olabilir.
Testler belirli donanım ve yazılım yapılandırmalarında yürütülmüştür. Çıkarım motorlarındaki gelişmeler sonuçları değiştirebilir.

Eksik noktalar veya yeni değişiklikleri yansıtacak güncellemeler varsa bize bildirin.

Optimizasyon hedefi

Yüksek eş zamanlı isteklerde yüksek işlem hacmi sağlar.

Deney kurulumu

Model

GPT-OSS-120B

Donanım

Tek düğümde 2 × NVIDIA A100 SXM 80GB GPU.

Motor sürümü

vLLM: v0.11.0
SGLang: v0.5.3
TensorRT-LLM: v1.2.0rc0

Benchmark veri kümesi

ShareGPT
Farklı dizi uzunluklarına sahip rastgele veri kümesi:
- Çok uzun istem: 32000 giriş token'ı, 100 çıkış token'ı
- Uzun istem: 4000 giriş token'ı, 200 çıkış token'ı
- Orta uzunlukta istem: 2000 giriş token'ı, 100 çıkış token'ı
- Kısa istem: 128 giriş token'ı, 4 çıkış token'ı

Benchmark betiği

Model performansını ölçmek için vLLM bench CLI aracını kullanıyoruz. Benchmark şu komutla çalıştırılır:

# Prepare the ShareGPT dataset
wget https://huggingface.co/datasets/anon8231489123/ShareGPT_Vicuna_unfiltered/resolve/main/ShareGPT_V3_unfiltered_cleaned_split.json

# Benchmark on ShareGPT dataset
vllm bench serve --model openai/gpt-oss-120b --backend openai-chat --endpoint /v1/chat/completions --dataset-name sharegpt --dataset-path ShareGPT_V3_unfiltered_cleaned_split.json --num-prompts 1000

# Benchmark on random dataset (fixed seed for reproducibility)
vllm bench serve --model openai/gpt-oss-120b --backend openai-chat --endpoint /v1/chat/completions --dataset-name random --random-input-len 4000 --random-output-len 200 --num-prompts 500 --seed 42

Deney sonuçları

1. Çıkarım motoru seçimi

vLLM

Model sunum betiği

vllm serve openai/gpt-oss-120b --max-model-len 32768

Benchmark sonucu

============ Serving Benchmark Result ============
Successful requests:                     1000
Benchmark duration (s):                  86.39
Total input tokens:                      215312
Total generated tokens:                  196656
Request throughput (req/s):              11.58
Output token throughput (tok/s):         2276.40
Peak output token throughput (tok/s):    3572.00
Peak concurrent requests:                1000.00
Total Token throughput (tok/s):          4768.75
---------------Time to First Token----------------
Mean TTFT (ms):                          25918.79
Median TTFT (ms):                        24822.43
P99 TTFT (ms):                           59731.55
-----Time per Output Token (excl. 1st token)------
Mean TPOT (ms):                          97.57
Median TPOT (ms):                        90.70
P99 TPOT (ms):                           206.31
---------------Inter-token Latency----------------
Mean ITL (ms):                           86.67
Median ITL (ms):                         70.10
P99 ITL (ms):                            210.76
==================================================

SGLang

Model sunum betiği

python3 -m sglang.launch_server --model-path openai/gpt-oss-120b --host 0.0.0.0 --port 8000 

Benchmark sonucu

============ Serving Benchmark Result ============
Successful requests:                     1000
Benchmark duration (s):                  597.93
Total input tokens:                      215312
Total generated tokens:                  197133
Request throughput (req/s):              1.67
Output token throughput (tok/s):         329.69
Peak output token throughput (tok/s):    1865.00
Peak concurrent requests:                1000.00
Total Token throughput (tok/s):          689.79
---------------Time to First Token----------------
Mean TTFT (ms):                          275030.66
Median TTFT (ms):                        270126.72
P99 TTFT (ms):                           550929.50
-----Time per Output Token (excl. 1st token)------
Mean TPOT (ms):                          765.78
Median TPOT (ms):                        486.18
P99 TPOT (ms):                           6656.59
---------------Inter-token Latency----------------
Mean ITL (ms):                           458.97
Median ITL (ms):                         112.65
P99 ITL (ms):                            6667.80
==================================================

TensorRT-LLM

Model sunum betiği

trtllm-serve openai/gpt-oss-120b --max_seq_len 32768

Benchmark sonucu

1	`NotImplementedError: WFP4A16 MoE is unsupported on SM80.`

Sonuç: vLLM (4768.75 tok/s) > SGLang(689.79 tok/s) > TensorRT-LLM (Desteklenmiyor)

2. vLLM için Asenkron zamanlama

Model sunum betiği

vllm serve openai/gpt-oss-120b --max-model-len 32768 --async-scheduling

Benchmark sonucu

============ Serving Benchmark Result ============
Successful requests:                     1000
Benchmark duration (s):                  82.35
Total input tokens:                      215312
Total generated tokens:                  195312
Request throughput (req/s):              12.14
Output token throughput (tok/s):         2371.67
Peak output token throughput (tok/s):    3615.00
Peak concurrent requests:                1000.00
Total Token throughput (tok/s):          4986.20
---------------Time to First Token----------------
Mean TTFT (ms):                          24787.19
Median TTFT (ms):                        23575.09
P99 TTFT (ms):                           56631.39
-----Time per Output Token (excl. 1st token)------
Mean TPOT (ms):                          92.70
Median TPOT (ms):                        86.19
P99 TPOT (ms):                           203.05
---------------Inter-token Latency----------------
Mean ITL (ms):                           82.31
Median ITL (ms):                         65.76
P99 ITL (ms):                            205.68
==================================================

Sonuç: asenkron zamanlama etkinleştirildiğinde işlem hacmi 4768.75 tok/s değerinden 4986.20 tok/s değerine yükselmiştir.

3. vLLM için Paralellik

TP2

Model sunum betiği

vllm serve openai/gpt-oss-120b --max-model-len 32768 --async-scheduling -tp 2

Benchmark sonucu

============ Serving Benchmark Result ============
Successful requests:                     1000
Benchmark duration (s):                  52.10
Total input tokens:                      215312
Total generated tokens:                  196156
Request throughput (req/s):              19.19
Output token throughput (tok/s):         3765.02
Peak output token throughput (tok/s):    5687.00
Peak concurrent requests:                1000.00
Total Token throughput (tok/s):          7897.72
---------------Time to First Token----------------
Mean TTFT (ms):                          16190.50
Median TTFT (ms):                        15435.84
P99 TTFT (ms):                           36099.41
-----Time per Output Token (excl. 1st token)------
Mean TPOT (ms):                          57.98
Median TPOT (ms):                        53.39
P99 TPOT (ms):                           132.88
---------------Inter-token Latency----------------
Mean ITL (ms):                           51.20
Median ITL (ms):                         40.51
P99 ITL (ms):                            134.62
==================================================

4. vLLM için Dikkat arka ucu

Varsayılan FlashAttention'dır.

FlashInfer

Model sunum betiği

VLLM_ATTENTION_BACKEND=FLASHINFER vllm serve openai/gpt-oss-120b --max-model-len 32768

Benchmark sonucu

RuntimeError: Worker failed with error 'FlashInfer backend currently does not support attention sinks, please use trtllm on blackwell or flash attention on earlier GPUs.', please check the stack trace above for the root cause

5. vLLM için Toplu işteki en fazla token sayısı

Model sunum betiği

vllm serve openai/gpt-oss-120b --max-model-len 32768 --async-scheduling --max-num-batched-tokens 4096

Benchmark sonucu

# --max-num-batched-tokens 4096
============ Serving Benchmark Result ============
Successful requests:                     1000
Benchmark duration (s):                  81.24
Total input tokens:                      215312
Total generated tokens:                  195400
Request throughput (req/s):              12.31
Output token throughput (tok/s):         2405.35
Peak output token throughput (tok/s):    3767.00
Peak concurrent requests:                1000.00
Total Token throughput (tok/s):          5055.82
---------------Time to First Token----------------
Mean TTFT (ms):                          24102.33
Median TTFT (ms):                        23200.31
P99 TTFT (ms):                           55834.89
-----Time per Output Token (excl. 1st token)------
Mean TPOT (ms):                          94.55
Median TPOT (ms):                        84.96
P99 TPOT (ms):                           332.44
---------------Inter-token Latency----------------
Mean ITL (ms):                           81.69
Median ITL (ms):                         65.37
P99 ITL (ms):                            263.32
==================================================
# --max-num-batched-tokens 8192
============ Serving Benchmark Result ============
Successful requests:                     1000
Benchmark duration (s):                  81.65
Total input tokens:                      215312
Total generated tokens:                  196734
Request throughput (req/s):              12.25
Output token throughput (tok/s):         2409.38
Peak output token throughput (tok/s):    4073.00
Peak concurrent requests:                1000.00
Total Token throughput (tok/s):          5046.28
---------------Time to First Token----------------
Mean TTFT (ms):                          24118.79
Median TTFT (ms):                        22914.78
P99 TTFT (ms):                           56155.47
-----Time per Output Token (excl. 1st token)------
Mean TPOT (ms):                          95.68
Median TPOT (ms):                        85.26
P99 TPOT (ms):                           379.93
---------------Inter-token Latency----------------
Mean ITL (ms):                           81.81
Median ITL (ms):                         65.77
P99 ITL (ms):                            232.43
==================================================

Sonuç: max-num-batched-tokens artırıldığında işlem hacmi 4986.20 tok/s değerinden 5046.28 tok/s değerine yükselmiştir.

Optimizasyon seçeneklerinin özeti

Optimizasyon seçeneği	İşlem hacmi iyileşmesi
Motor seçimi	-
Asenkron zamanlama	+4.6%
Paralellik	-
Dikkat arka ucu	-
Toplu işteki en fazla token sayısı	+1.2%

Diğer benchmark senaryoları

Optimize edilmiş yapılandırmanın farklı iş yüklerine genellenebilirliğini değerlendirmek için ek benchmark testleri yaptık.

Temel model sunum betiği

vllm serve openai/gpt-oss-120b --max-model-len 32768

Temel benchmark sonuçları

# random 32K input
============ Serving Benchmark Result ============
Successful requests:                     100
Benchmark duration (s):                  740.10
Total input tokens:                      3200000
Total generated tokens:                  9988
Request throughput (req/s):              0.14
Output token throughput (tok/s):         13.50
Peak output token throughput (tok/s):    176.00
Peak concurrent requests:                100.00
Total Token throughput (tok/s):          4337.21
---------------Time to First Token----------------
Mean TTFT (ms):                          368856.64
Median TTFT (ms):                        368713.30
P99 TTFT (ms):                           730947.33
-----Time per Output Token (excl. 1st token)------
Mean TPOT (ms):                          224.58
Median TPOT (ms):                        228.19
P99 TPOT (ms):                           231.28
---------------Inter-token Latency----------------
Mean ITL (ms):                           233.21
Median ITL (ms):                         24.23
P99 ITL (ms):                            676.79
==================================================

# random 4K input
============ Serving Benchmark Result ============
Successful requests:                     500
Benchmark duration (s):                  269.39
Total input tokens:                      1999249
Total generated tokens:                  67259
Request throughput (req/s):              1.86
Output token throughput (tok/s):         249.67
Peak output token throughput (tok/s):    1146.00
Peak concurrent requests:                500.00
Total Token throughput (tok/s):          7671.00
---------------Time to First Token----------------
Mean TTFT (ms):                          133561.13
Median TTFT (ms):                        134006.62
P99 TTFT (ms):                           263106.36
-----Time per Output Token (excl. 1st token)------
Mean TPOT (ms):                          112.18
Median TPOT (ms):                        114.77
P99 TPOT (ms):                           136.26
---------------Inter-token Latency----------------
Mean ITL (ms):                           117.62
Median ITL (ms):                         27.99
P99 ITL (ms):                            353.98
==================================================

# random 2K input
============ Serving Benchmark Result ============
Successful requests:                     500
Benchmark duration (s):                  123.94
Total input tokens:                      999120
Total generated tokens:                  48981
Request throughput (req/s):              4.03
Output token throughput (tok/s):         395.21
Peak output token throughput (tok/s):    1696.00
Peak concurrent requests:                500.00
Total Token throughput (tok/s):          8456.65
---------------Time to First Token----------------
Mean TTFT (ms):                          61328.02
Median TTFT (ms):                        61764.97
P99 TTFT (ms):                           120670.44
-----Time per Output Token (excl. 1st token)------
Mean TPOT (ms):                          131.94
Median TPOT (ms):                        138.30
P99 TPOT (ms):                           150.84
---------------Inter-token Latency----------------
Mean ITL (ms):                           139.51
Median ITL (ms):                         214.02
P99 ITL (ms):                            432.26
==================================================

# random 128 input
============ Serving Benchmark Result ============
Successful requests:                     1000
Benchmark duration (s):                  14.09
Total input tokens:                      127755
Total generated tokens:                  4000
Request throughput (req/s):              70.99
Output token throughput (tok/s):         283.95
Peak output token throughput (tok/s):    273.00
Peak concurrent requests:                1000.00
Total Token throughput (tok/s):          9353.12
---------------Time to First Token----------------
Mean TTFT (ms):                          7813.18
Median TTFT (ms):                        7750.58
P99 TTFT (ms):                           13935.99
-----Time per Output Token (excl. 1st token)------
Mean TPOT (ms):                          182.75
Median TPOT (ms):                        189.53
P99 TPOT (ms):                           193.12
---------------Inter-token Latency----------------
Mean ITL (ms):                           274.25
Median ITL (ms):                         196.02
P99 ITL (ms):                            386.54
==================================================

# ShareGPT batch size 4
============ Serving Benchmark Result ============
Successful requests:                     100
Maximum request concurrency:             4
Benchmark duration (s):                  66.52
Total input tokens:                      22946
Total generated tokens:                  21691
Request throughput (req/s):              1.50
Output token throughput (tok/s):         326.09
Peak output token throughput (tok/s):    368.00
Peak concurrent requests:                11.00
Total Token throughput (tok/s):          671.05
---------------Time to First Token----------------
Mean TTFT (ms):                          61.91
Median TTFT (ms):                        61.55
P99 TTFT (ms):                           112.05
-----Time per Output Token (excl. 1st token)------
Mean TPOT (ms):                          11.67
Median TPOT (ms):                        11.44
P99 TPOT (ms):                           15.03
---------------Inter-token Latency----------------
Mean ITL (ms):                           11.74
Median ITL (ms):                         11.14
P99 ITL (ms):                            38.75
==================================================  

Optimize edilmiş model sunum betiği

vllm serve openai/gpt-oss-120b --max-model-len 32768 --async-scheduling --max-num-batched-tokens 4096

Optimize edilmiş benchmark sonuçları

# random 32K input
============ Serving Benchmark Result ============
Successful requests:                     100
Benchmark duration (s):                  696.89
Total input tokens:                      3200000
Total generated tokens:                  9828
Request throughput (req/s):              0.14
Output token throughput (tok/s):         14.10
Peak output token throughput (tok/s):    196.00
Peak concurrent requests:                100.00
Total Token throughput (tok/s):          4605.91
---------------Time to First Token----------------
Mean TTFT (ms):                          346799.49
Median TTFT (ms):                        346737.12
P99 TTFT (ms):                           687309.14
-----Time per Output Token (excl. 1st token)------
Mean TPOT (ms):                          201.61
Median TPOT (ms):                        203.58
P99 TPOT (ms):                           271.48
---------------Inter-token Latency----------------
Mean ITL (ms):                           209.02
Median ITL (ms):                         20.50
P99 ITL (ms):                            1206.69
==================================================

# random 4K input
============ Serving Benchmark Result ============
Successful requests:                     500
Benchmark duration (s):                  244.13
Total input tokens:                      1999249
Total generated tokens:                  68059
Request throughput (req/s):              2.05
Output token throughput (tok/s):         278.79
Peak output token throughput (tok/s):    1289.00
Peak concurrent requests:                500.00
Total Token throughput (tok/s):          8468.21
---------------Time to First Token----------------
Mean TTFT (ms):                          121158.11
Median TTFT (ms):                        121158.59
P99 TTFT (ms):                           238837.53
-----Time per Output Token (excl. 1st token)------
Mean TPOT (ms):                          99.77
Median TPOT (ms):                        102.46
P99 TPOT (ms):                           122.61
---------------Inter-token Latency----------------
Mean ITL (ms):                           104.98
Median ITL (ms):                         25.69
P99 ITL (ms):                            397.17
==================================================

# random 2K input
============ Serving Benchmark Result ============
Successful requests:                     500
Benchmark duration (s):                  113.32
Total input tokens:                      999120
Total generated tokens:                  49103
Request throughput (req/s):              4.41
Output token throughput (tok/s):         433.30
Peak output token throughput (tok/s):    1893.00
Peak concurrent requests:                500.00
Total Token throughput (tok/s):          9249.89
---------------Time to First Token----------------
Mean TTFT (ms):                          55458.38
Median TTFT (ms):                        56144.82
P99 TTFT (ms):                           110079.18
-----Time per Output Token (excl. 1st token)------
Mean TPOT (ms):                          117.85
Median TPOT (ms):                        125.32
P99 TPOT (ms):                           135.13
---------------Inter-token Latency----------------
Mean ITL (ms):                           125.08
Median ITL (ms):                         31.45
P99 ITL (ms):                            575.36
==================================================

# random 128 input
============ Serving Benchmark Result ============
Successful requests:                     1000
Benchmark duration (s):                  12.22
Total input tokens:                      127755
Total generated tokens:                  4000
Request throughput (req/s):              81.86
Output token throughput (tok/s):         327.44
Peak output token throughput (tok/s):    360.00
Peak concurrent requests:                1000.00
Total Token throughput (tok/s):          10785.60
---------------Time to First Token----------------
Mean TTFT (ms):                          6900.44
Median TTFT (ms):                        6888.59
P99 TTFT (ms):                           11990.00
-----Time per Output Token (excl. 1st token)------
Mean TPOT (ms):                          301.66
Median TPOT (ms):                        320.19
P99 TPOT (ms):                           323.93
---------------Inter-token Latency----------------
Mean ITL (ms):                           452.71
Median ITL (ms):                         327.62
P99 ITL (ms):                            652.15
==================================================

# ShareGPT batch size 4
============ Serving Benchmark Result ============
Successful requests:                     100
Maximum request concurrency:             4
Benchmark duration (s):                  62.98
Total input tokens:                      22946
Total generated tokens:                  21691
Request throughput (req/s):              1.59
Output token throughput (tok/s):         344.39
Peak output token throughput (tok/s):    387.00
Peak concurrent requests:                11.00
Total Token throughput (tok/s):          708.71
---------------Time to First Token----------------
Mean TTFT (ms):                          71.15
Median TTFT (ms):                        70.23
P99 TTFT (ms):                           131.39
-----Time per Output Token (excl. 1st token)------
Mean TPOT (ms):                          11.03
Median TPOT (ms):                        10.78
P99 TPOT (ms):                           15.48
---------------Inter-token Latency----------------
Mean ITL (ms):                           11.07
Median ITL (ms):                         10.49
P99 ITL (ms):                            36.80
==================================================