Question 630
At the Cedarport high-performance computing center, a design repeatedly copies GPU buffers through host memory for supported network transfers and incurs high CPU overhead. Which issue is most directly indicated by the facts?
Explanation
Correct Answer
The situation indicates that eligible direct GPU-network transfers can reduce unnecessary staging through CPU system memory. The recommended response is to evaluate supported GPUDirect RDMA paths with compatible GPUs NICs and memory mappings, with a follow-up check that a supported data movement benchmark shows the expected path and correct transfer completion. This directly addresses the reported issue at the Cedarport high-performance computing center.
Incorrect Answers
Congestion marking can provide earlier feedback than loss-only detection when configured end to end. This can occur in other projects, but it is not the primary explanation at the Cedarport high-performance computing center.
This explanation belongs to fire and environmental protection. The immediate weakness in the question is that eligible direct GPU-network transfers can reduce unnecessary staging through CPU system memory. For the Cedarport high-performance computing center, the priority is to evaluate supported GPUDirect RDMA paths with compatible GPUs NICs and memory mappings.
Although high peak throughput alone does not guarantee low collective-communication latency, the situation does not describe that specific cause; it instead indicates that eligible direct GPU-network transfers can reduce unnecessary staging through CPU system memory. For the Cedarport high-performance computing center, the priority is to evaluate supported GPUDirect RDMA paths with compatible GPUs NICs and memory mappings.