To learn basics of InfiniBand I suggest you to visit Mellanox Academy Web-Site and after registration take InfiniBand Essentials or InfiniBand Fundamentals course (in a section Technologies). In my opinion "switch-based architecture" means that switches are part of fabric (see picture below, where I have shown switch by blue shape).

2012年9月27日 · For Infiniband there is ibdump, however, depending on the Infiniband software you are using (open-source OFED vs. the proprietary Mellanox OFED) and the host channel adapter (HCA) you might be able to use tcpdump to capture Infiniband traffic, as well.

2023年12月28日 · IPoIB (IP-over-InfiniBand) is a protocol that defines how to send IP packets over IB; and for example Linux has an "ib_ipoib" driver that implements this protocol. This driver creates a network interface for each InfiniBand port on the system, which makes an HCA act like an ordinary NIC.

2013年8月26日 · If latency is a concern in the system, which is frequently the case when InfiniBand is a design choice, then you should consider the effect that longer cables will have. The speed of light through fiber is around 5 nanoseconds per meter. Typical FDR latency is around 700ns, so a 100 meter cable is going to nearly double that. It may not be a ...

There is also an InfiniBand card on each machine. I want to communicate between GPU cards on different machines through InfiniBand. Just point to point unicast would be fine. I surely want to use GPUDirect RDMA so I could spare myself of extra copy operations. I am aware that there is a driver available now from Mellanox for its InfiniBand ...

2019年10月30日 · MLNX_OFED has embedded performance tweaks that can only be utilized with it. In most scenarios, with a well tuned MLNX_OFED you will be able to see benchmarking advantage.

2018年5月11日 · The driver is in the background, telling the OS how to interoperate with the HCA (deciding transport protocol InfiniBand, vs, Ethernet, MTU, CM vs, RD queue pair exchange mode, etc.). Additionally, it supplies the InfiniBand programming interfaces and additional utilities for troubleshooting etc.

2018年6月11日 · I recently started to work with Infiniband cards, two Mellanox Technologies MT27700 Family [ConnectX-4] to be specific. Eventually, I want to extend an existing framework with interfaces based on the VPI Verbs API/RDMA CM API.

2011年11月25日 · I'm trying to find programmatically the inet address of an Infiniband interface whose name is not know a priori. I'm on Linux, and I would like to avoid the parsing of ifconfig (8) output. I've read the second comment on this answer, that suggests to use getifaddrs() to retrieve the interfaces, but then I cannot select the Infiniband one.

I am trying to create a QueuePair with ibv_create_qp() and I have to describe the size of the Queue Pair by setting the fields of the struct ibv_qp_cap and providing it to the create function. My i...