目前网络通信已经成为分布式机器学习的性能瓶颈。本文将讨论GPU通信和PCIe P2P DMA技术,为大规模分布式应用通信性能的优化提供参考。本文将依次回答如下三个问题,并探讨今后IO设备互连该走向什么方向。 为了回答…
PCIe技术始终扮演着核心角色，其作为连接 CPU 与各类周边设备的关键高速通信链路，不断推动着计算机性能边...
Hello, I like to know whether P2P DMA packets on PCIe bus routed by GPU have narrower bandwidth than Dev-to-RAM cases. [SYMPTOM] When I run a
Based on my new server, with Xeon Gold 6126T and NVIDIA Tesla V100 / P40 (as previous test), it improved P2P DMA performance from 7.1GB/s to 8.5GB/s. https://translate.google.com/translate?hl=ja&sl=auto&tl=en&u=http://kaigai.hatenablog.com/entry/2018/01/30/2113...
1 P2P DMA概述 Background The idea goes back to 2012 or so, Bates said, when he and Logan Gunthorpe (who did "most of the real work") were working on NVMe SSDs, RDMA, and NVMe over fabrics (before it was a standard, he thought). Some customers suggested that being able to DMA di...
IEEE报告解读：存储技术发展趋势分析 PCIe P2P DMA全景解读 深度解读NVMe计算存储协议 浅析不同NAND架构的...
2. If Broadwell-EP Xeon has such limitation on P2P DMA routing, is it improved at the Skylake-S (Xeon Scalable)? Depends upon which specific scalable processor are we comparing. In general scalable processors have more # of PCI lanes than E5- V4. Thanks for your reply. At ...
I like to know whether P2P DMA packets on PCIe bus routed by GPU have narrower bandwidth than Dev-to-RAM cases. [SYMPTOM] When I run a sequential data transfer workload (read of SSD data blocks) using peer-to-peer DMA from triple Intel DC P4600 SSD (striped with md-raid...
[PATCH v11 0/9] Userspace P2PDMA with O_DIRECT NVMe devices This is the latest P2PDMA userspace patch set. This version includes some cleanup from feedback from the last posting[1]. This patch set enables userspace P2PDMA by allowing userspace to mmap() allocated chunks of the CMB. ...
这项演示不仅是对PCIe 7.0技术潜力的有力证明,也预示着光学互连技术在高速数据传输领域的新突破。通过克服传统铜缆在高速率下的信号衰减和干扰问题,光学连接为PCIe 7.0的广泛应用打开了新的大门,尤其是在对数据传输速度和延迟有极高要求的高性能计算(HPC)、人工智能(AI)、数据中心等领域。