NEC A1160 manual Memory

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Memory

Figure 2-3 Node Controller

Memory

Express5800/A1160 systems use a directory-based cache-coherent memory system. The directory-based memory tracks ownership of data. The cache coherency protocols force the processor cache components and main storage components to

yKeep track of all copies of a cache line.

yDetermine which processor has permission to update an instance of a cache line.

yMark other copies of the cache line as "invalid" when an update occurs.

Memory Board. System memory is contained on the memory board. The memory board includes the fully buffered DIMMs and their associated power delivery components. A cell contains one or two memory boards. Each memory board supports

yTwo fully buffered DIMM channels from the node controller. Each channel operates as a single memory channel. These two channels are referred to as a channel pair.

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Contents Technical Overview ƒ EXPRESS5800/A1160December Proprietary Notice and Liability DisclaimerContents Contents Figures Page Vii TablesPage Who Should Use This Guide Using This GuidePage Safety Notices Safety NoticesPage Safety Notices for Users Outside of the U.S.A. and Canada Page Scalable Symmetric Multiprocessing Servers Documentation UpdatesWindows Operating Systems Operating SystemsOperating Systems Linux Operating Systems Virtual Machine MonitorsVirtual Machine Monitors Page Express5800/A1160 Cell Cell ComponentProcessors ProcessorsProcessor Sockets Extended Memory 64 Technology EM64T Supported ProcessorsRules for Mixing Processors Multicore ProcessorsNode Controller Processor Voltage Regulator ModulesMemory MemoryMemory Boards Dimm Slot NumberingDimm Capacity and Cell Memory Dimm Capacity and Cell MemoryRules for Memory Expansion Memory Mirroring Indicators on the Memory BoardSubsystem Dynamic Dimm SparingI/O Riser Board PCIe Card CarrierPCIe Card Carrier PortsPorts on Back of the Cell Inbuilt RAID ControllerPower Control PowerPower AC/DC Power SuppliesCooling Partitions and PowerUninterruptible Power Supply UPS Volt Redundancy and AC Source OptionsCooling Peripherals PeripheralsExternal Peripherals Boot OptionsSystem Clocks System ClocksExpressscope Monitor Device Names on the Expressscope Monitor LCD Fault Messages on the Expressscope Monitor LCDFault Messages on the Expressscope Monitor LCD CRU For More Information Inbuilt VirtualizationTrusted Platform Module TPM Inbuilt VirtualizationCell Interconnect and Multiple Cell Systems System ConfigurationSystem with Two Cells Cell Interconnect and Multiple Cell SystemsRelation of Interconnect Port and Cable End to Cell ID Cell IdentificationSystem Serial Number Cell IdentificationCabinets CabinetsPartitions PartitionsClustering Clustering Software Redundant ConfigurationsRedundant Configurations Replaceable ComponentsMinimum and Maximum Configurations Express5800/A1160 Configuration SummaryExpress5800/A1160 Configuration Summary Page System Components Server ManagementNetwork Components Console Manager Client Software Windows Domain ControllerManagement Server Client WorkstationMain Components Management ArchitectureIntelligent Platform Management Interface Management Board Management BoardFirmware Hub Service ProcessorPorts Remote Console InterfacesRemote Console Interfaces Trusted Platform Module TPMServer Management Software BiosManagement Software Components Management Software ComponentsEsmpro Manager and Agent Remote Monitoring Accessing Remote MonitoringComponents on the Front of a Cell Cell ComponentsLCD Components on the Rear of a CellComponents on the Rear of a Cell AC power cord