rom 20% (8B/10B) to 2% and a net rate of 7.88 Gbps (see above). Adding TLP overheads: 32 Bytes TLP overhead including ECRC: 20 Bytes Link layer overheads: 12 Bytes DL-HDR sequence number in memory read/write request: 2B Link layer CRC added to memory read/write request: 4B Link layer ACK from the other end: 6B The overall efficiency can now be calculated as: Maximum Payload Size Packet efficiency Maximum Payload Size + 256B + 32B The theoretical maximum data throughput is the packet efficiency as a percentage of the Theoretical Bandwidth calculated above: Theoretical maximum data throughput = 0.88 X 7.88 Gbps = 6.95 Gbps. In practice, we account for approximately 80% of theoretical PCIe performance to be achievable on a well-implemented practical system. Note that PCIe is a bi-directional inter- face, the throughput targets can be achieved in both directions simultaneously. References 1. Broadcom. Monterey/BCM56670 Series. .<https://www.broadcom.com/products/ethernet-connectivity/ switching/strataxgs/bcm56670> 2. Open Data Center Committee OTH Server for 5G and Edge computing. 2019. <http://www.opendatacen- ter.cn/work-group/p-1143085492931629057.html>. 3. NXP. B4860: QorIQ B4860 Baseband Processor. <https://www.nxp.com/products/processors-and-micro- controllers/power-architecture/qoriq-communication-processors/qonverge-platform/qoriq-b4860-base- band-processor:B4860>. 182 Open Radio Access Network (O-RAN) Systems Architecture and Design 4. Frumusanu, A. Marvell Announces OCTEON Fusion and OCTEON TX2 5G Infrastructure Processors. 2020. <https://www.anandtech.com/show/15572/marvell-announces-octeon-fusion-and-octeon-tx2-5g-infra- tructure-processors>. 5. NXP. Layerscape Access LA1200 Programmable Baseband Processor. <https://www.nxp.com/products/ rocessors-and-microcontrollers/arm-processors/layerscape-multicore-processors/layerscape-access- la1200-programmable-baseband-processor:LA1200>. 6. 3GPP TS 36.104; Evolved Universal Terrestrial Radio Access (E-UTRA); Base Station (BS) radio transmis- sion and reception. 7