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Почему не стоит верить nvidia-smi “GPU utilization”
arthurchiao.github.io/blog/understanding-gpu-performance/

Nvidia использует очень особый способ определения утилизации GPU. 100% означают не что девайс загружен на 100%, а что хотя бы одно ядро было использовано хотя бы чуть-чуть 100% времени за последние N (мили)секунд

Очень яркий пример это примитивы синхронизации: когда вы вызываете torch.barrier GPU Utilization становится 100% при том что на самом деле железо просто «активно ждет».

Для реальной оценки загруженности GPU лучше использовать SM Occupancy которая показывает средний процент загрузки ядер GPU (то что я бы изначально ожидал увидеть от utilization честно говоря).

Для этого рекомендуют использовать dcgm-exporter

DL in NLP
Почему не стоит верить nvidia-smi “GPU utilization”
arthurchiao.github.io/blog/understanding-gpu-performance/

Nvidia использует очень особый способ определения утилизации GPU. 100% означают не что девайс загружен на 100%, а что хотя бы одно ядро было использовано хотя бы чуть-чуть 100% времени за последние N (мили)секунд

Очень яркий пример это примитивы синхронизации: когда вы вызываете torch.barrier GPU Utilization становится 100% при том что на самом деле железо просто «активно ждет».

Для реальной оценки загруженности GPU лучше использовать SM Occupancy которая показывает средний процент загрузки ядер GPU (то что я бы изначально ожидал увидеть от utilization честно говоря).

Для этого рекомендуют использовать dcgm-exporter
GitHub
ml-engineering/compute/accelerator/nvidia/debug.md at master · stas00/ml-engineering
Machine Learning Engineering Open Book. Contribute to stas00/ml-engineering development by creating an account on GitHub.
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Почему не стоит верить nvidia-smi “GPU utilization”

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