PCI Express bus

Modern network applications for high-speed network technologies leverage hardware acceleration together with the processing power of the host system’s CPU cores to achieve sufficient performance. To be able to transfer data between hardware and software, it is necessary to use an effective host interface. The past decade has been dominated by PCI Express, resulting in the PCI Express bus being available on all modern server platforms. This makes PCI Express-based hardware suitable for use with commodity servers, making the whole solution much cheaper when compared to dedicated hardware and much more flexible because it enables the use of standardized software tools.



The throughput of a PCI Express bus in configuration Gen 3 x16, which is used on all of the current Netcope network interface cards, is on the level of 100G Ethernet, as the 128Gbps of the theoretical data rate of the PCI Express provides enough space to transfer 100Gbps of network traffic in the form of Ethernet frames.

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The next generation of Netcope cards will use a PCI Express Gen 4 x16 host interface that doubles the throughput and will allow transfer of 200Gbps of network traffic. In addition, the PCI Express bus is full duplex, which allows transfers with the aforementioned throughput in both directions simultaneously.

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