Download PDF - Nvidia
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“Reverse-time” Imaging<br />
Inter-GPU communication<br />
• High frequency requires<br />
– Dense sampling<br />
– Large memory<br />
– Multiple GPUs<br />
– Halo exchange<br />
– Inter-GPU communication<br />
• Device Host<br />
– Use pinned memory<br />
– PCIe bus predictably yields ~ 5 GB/s<br />
– ~ 10 % of kernel time<br />
– Easily hidden<br />
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