I have a question regarding to memory throughput of the Xavier AGX.
Xavier is in the highest performance mode (nvpmodel –m 0 jetson_clocks)
CUDA sample
/usr/local/cuda-10.2/samples/1_Utilities/bandwithTest/
In the specs it is written that the Xavier peek memory throughput is 137 GB/s and device memory, host memory, and unified memory are allocated on the same physical SoC DRAM.
Why is the bandwidth from device to host(host to device)only 30% of the standard value？
Device 0: Xavier
Quick Mode
Host to Device Bandwidth, 1 Device(s)
PINNED Memory Transfers
Transfer Size (Bytes) Bandwidth(GB/s)
32000000 37.5
Device to Host Bandwidth, 1 Device(s)
PINNED Memory Transfers
Transfer Size (Bytes) Bandwidth(GB/s)
32000000 37.3
Device to Device Bandwidth, 1 Device(s)
PINNED Memory Transfers
Transfer Size (Bytes) Bandwidth(GB/s)
32000000 108.1
Result = PASS