3 ms·
> PCIe P2P transfers go through the CPU PCIe P2P transfers can go direct through a downstream PCIe switch such as found on chipsets without having to bump back
by zamadatix 2y ago
> PCIe P2P transfers go through the CPU
PCIe P2P transfers can go direct through a downstream PCIe switch such as found on chipsets without having to bump back up through the CPU.
- namibj 2y agoAnd even with e.g. AMD Matisse, aka Desktop Ryzen Zen3 on AM4, it turns around in the PCIe root complex instead of consuming infinity fabric bandwidth.