PCIe 7.0 增强功能为 OCP 服务器基础架构提供高速 I_O 连接.pdf

1、Hemal Shah,Broadcom Inc.Travis Hamilton,ArmPCIe 7.0 Enhancements for High-speed I/O Connectivity on OCP Server InfrastructurePCIe 7.0 Enhancements for high-speed I/O connectivity on OCP server InfrastructureHemal Shah,Distinguished Engineer and Architect,Broadcom Inc.Travis Hamilton,Senior Principal

2、 System Architect,ARMSERVER:AI HW SW CO-DESIGN/NIC/HPCOverview of PCIe Gen7 FeaturesPCIe Gen7 Use CasesChallenges with scaling performance in Gen7Unordered IO(UIO)IntroductionUIO Modeling ResultsAgenda7.0 is an incremental update to 6.0Doubles Gen6 rate:128 GT/s raw bit rate and up to 512 GB/s bi-di

3、rectionally via x16Uses Same signaling utilizing PAM4(Pulse Amplitude Modulation with 4 levels)Focuses on the channel parameters and reachImprovements for power efficiencyBackwards compatible with all previous generations of PCIe technologyFeature enhancementsPCIe Gen7 IntroductionOverview of Gen7 F

4、eature EnhancementsEnhancementDescriptionData ratePer lane data rate of 128 GT/s requiredUnordered IO(UIO)EnhancementsAddresses limitations of the PCI/PCIe fabric-enforced ordering rulesEnables multi-path fabric supportDynamic Shared Flow Control UsageAbility to limit the usage of dynamic shared flo

5、w control creditsScalable I/O Virtualization(SIOV)SIOV is a next-generation I/O virtualization frameworkSIOV introduces the notion of light-weight&composable Scalable Device InterfacesTDISPTEE Device Interface Security ProtocolOptical Aware Extension ComponentsChanges to make PCIe and optical links

6、work better togetherRC ECS HandlingEnhancement to Error Corrections,applicable to root portsSFI Enhancements(eSFI)System Firmware Intermediary enhancementsNOP Flit ExtensionsDebug-Flit type for link/SoC debug informationLTR Enhancements for MFDLatency reporting enhancements for multi-function device