Open Accelerator Infrastructure (OAI) Workstream Update on 112Gbps Signal Integrity Assesment.pdf

1、Open Accelerator Infrastructure(OAI)WorkstreamOAI Update and 112Gbps Signal Integrity AssessmentIT Ecosystem:Server&StorageOpen Accelerator Infrastructure(OAI)Workstream OAI Update-112GbpsSignal Integrity AssessmentVasanta Madduri,Senior Member Technical Marketing,BroadcomSam Kocsis,Director of Stan

2、dards and Technology,AmphenolSong Kok Hang,AI/HPC System Architect,MetaOPENACCELERATOR INFRASTRUCTUREAgenda OAI Timeline OAI System Overview OAI Demo Concept Contributor Components Overview Validating Link Assumptions with Real Hardware Call to ActionOAI TimelineQ2,2019Q42018Q22020 Q12022Q12023 OAM

3、ConceptOAM v1.0UBB v0.4OAM v1.1UBB v1.0112G-PAM4PCIe G5OAM r2.0 v0.75UBB r2.0 v0.5112G-PAM4PCIe G5/G6700WAir/Liquid Cooled1000WAir/Liquid Cooled56G-PAM4PCIe G4700W(450W)Air/Liquid Cooled28G-NRZPCIe G4700W(450W)Air Cooled25G-NRZPCIe G3450WAir CooledOAM r2.0 v1.0 UBB r2.0 v0.75EXP r2.0 v.75112G-PAM4PC

4、Ie G5/G61000WAir/Liquid CooledQ32023 OAM v1.5UBB v1.5Universal Base-BoardPDBOAMHost Interface BoardHost connectorsOAMOAMOAMOAMOAMOAMOAMEXPSCM AC PowerHost InterfaceClocks and SideBand signalsdHost interfacePower,Clocks and Sideband signalsScale out inteconnect DC PowerROTROTROTROTEXP EXP EXP EXP EXP

5、 EXP EXPOAI System BlocksOAI HardwareUBB:Enabled for 112GbpsExpansion card(EXP):Scale Out,with retimersVRM 12V to LV RailsVRM54V to 12V(200-500W)PHY Retimer,Switch,NIC,Remote MEM,etc Expansion CardUBBOAMEnd-to-End Channel Topology(EXP-EXP)EXP to EXP Loss Budget 28-31dBEXP Tx/Rx(5dB)+IO(18-21dB)+EXP

6、Tx/Rx(5dB)OAM0OAM3OAM1OAM27621L31H575741L2375651H 1L642 1L1H42641H 33OAM4OAM7OAM5OAM67621L31H575741L2375651H 1L642 1L342643 1H1HRetimersRetimersOSFP/QSFP-DD0-3OSFP/QSFP-DD4-7RetimersOAI Spec drawingRetimer0-3Retimer4-7Retimer8-11Retimer12-15Retimer16-19Retimer20-23Retimer24-27Retimer28-31QSFP-DDOSFP