Getting Started with DGX Station A100
DGX Station A100 DU-10189-001 _v5.0.2|14
***NOTE: In case a device doesn't have P2P access to other one, it falls back to
normal memcopy procedure.
So you can see lesser Bandwidth (GB/s) and unstable Latency (us) in those cases.
P2P Connectivity Matrix
D\D 0 1 2 3
0 1 1 1 1
1 1 1 1 1
2 1 1 1 1
3 1 1 1 1
Unidirectional P2P=Disabled Bandwidth Matrix (GB/s)
D\D 0 1 2 3
0 1324.15 15.54 15.62 15.47
1 16.55 1353.99 15.52 16.23
2 15.87 17.26 1408.93 15.91
3 16.33 17.31 18.22 1564.06
Unidirectional P2P=Enabled Bandwidth (P2P Writes) Matrix (GB/s)
D\D 0 1 2 3
0 1498.08 93.30 93.53 93.48
1 93.32 1583.08 93.54 93.52
2 93.55 93.60 1583.08 93.36
3 93.49 93.55 93.28 1576.69
Bidirectional P2P=Disabled Bandwidth Matrix (GB/s)
D\D 0 1 2 3
0 1583.08 19.92 20.47 19.97
1 20.74 1586.29 20.06 20.22
2 20.08 20.59 1590.33 20.01
3 20.44 19.92 20.60 1589.52
Bidirectional P2P=Enabled Bandwidth Matrix (GB/s)
D\D 0 1 2 3
0 1592.76 184.88 185.21 185.30
1 184.99 1589.52 185.19 185.32
2 185.28 185.30 1585.49 185.01
3 185.45 185.39 184.84 1587.91
P2P=Disabled Latency Matrix (us)
GPU 0 1 2 3
0 2.38 21.56 21.61 21.56
1 21.70 2.34 21.54 21.56
2 21.55 21.56 2.41 21.06
3 21.57 21.34 21.56 2.39
CPU 0 1 2 3
0 4.22 11.99 12.71 12.09
1 11.86 4.09 12.00 11.71
2 12.52 11.98 4.27 12.24
3 12.22 11.75 12.19 4.25
P2P=Enabled Latency (P2P Writes) Matrix (us)
GPU 0 1 2 3
0 2.32 2.57 2.55 2.59
1 2.55 2.32 2.59 2.52
2 2.59 2.56 2.41 2.59
3 2.57 2.55 2.56 2.40
CPU 0 1 2 3
0 4.24 3.57 3.72 3.81
1 3.68 4.26 3.75 3.63
2 3.79 3.75 4.34 3.71
3 3.72 3.64 3.66 4.32
NOTE: The CUDA Samples are not meant for performance measurements. Results may vary
when GPU Boost is enabled.
For bare metal applications, the UUID can also be specified in the CUDA_VISIBLE_DEVICES
variable as shown below:
lab@ro-dvt-058-80gb:/usr/local/cuda-11.2/samples/bin/x86_64/linux/release
$ CUDA_VISIBLE_DEVICES=GPU-0f2dff15-7c85-4320-da52-d3d54755d182,GPU-dc598de6-
dd4d-2f43-549f-f7b4847865a5 ./p2pBandwidthLatencyTest
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