NVLink
High speed chip interconnect
Nº Q19612817 ★
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NVLink
High speed chip interconnect
NVLink is a wire-based serial, multi-lane, near-range, communications link developed by Nvidia. Unlike PCI Express, a device can consist of multiple NVLinks, and devices can use mesh networking to communicate instead of a central hub/switch.
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NVLink is a wire-based serial, multi-lane, near-range, communications link developed by Nvidia. Unlike PCI Express, a device can consist of multiple NVLinks, and devices can use mesh networking to communicate instead of a central hub/switch. The protocol was first announced in March 2014 and uses a proprietary high-speed signaling interconnect (NVHS). For small numbers of GPUs, the NVLink lanes on a single device are sufficient for an all-to-all mesh connectivity. To accommodate higher GPU counts, NVLink since 2018 use a packet-switched architecture, where a central switch can serve up to 32 two-lane ports. The NVSwitch for NVLink 4.0 can produce some simple computation of its own (e.g., sum, broadcast) to reduce the need for communication thanks to the "SHARP" accelerator.
Texto: Wikipédia em inglês, CC BY-SA 4.0. ·
