14. 2.5x Faster CPU-GPU Data
Communication via NVLink
NVLink
80 GB/s
GPU
P8
GPU GPU
P8
GPU
PCIe
32 GB/s
GPU
x86
GPU GPU
x86
GPU
No NVLink between CPU &
GPU for x86 Servers: PCIe
Bottleneck
NVIDIA P100 Pascal GPU
“Minsky”
POWER8 NVLink Server
x86 Servers with PCIe
• GPUアクセラレーター使用用途にカスタ
マイズされた高速サーバー
• 他社比 2.5倍速のCPU-GPU間接続で、高
速GPUに常にデータを供給
15. 0
20
40
60
80
100
120
140
x86 with 4x M40 / PCIe Power8 with 4x P100 /
NVLink
Training time (minutes):
AlexNet and Caffe to top-1,
50% Accuracy
(Lower is better)
0:00
1:12
2:24
3:36
4:48
6:00
7:12
8:24
x86 with 8x M40 / PCIe Power8 with 4x P100 /
NVLink
BVLC Caffe vs IBM Caffe /
VGGNet
Time toTop-1 50% accuracy:
(Lower is better)
15
S822LC/HPC with 4 Tesla P100
Tesla GPUs is 24% Faster than
8x Tesla M40 GPUs
S822LC/HPC with 4 Tesla
P100 GPUs is 2.2x Faster
than 4x Tesla M40 GPUs