Wednesday, March 12, 2014

Processor information using dmidecode on Linux

Number of Socket, Cores, and hardware therads are common question that we need to know about a system running an Oracle database, one that is being used as a Hadoop NameNode or a DataNode.
The /proc/cpuinfo gives us fair bit of that information, but the dmidecode gives us some more detail.

We see below that the dmidecode tells us that we have 2 sockets, and that there are 12 hardware threads that are running per socket. Also, we can see that each socket has 6 cores.


[root@isvx3 hwloc-1.7.2]# dmidecode -t processor
SMBIOS 2.5 present.

Handle 0x0001, DMI type 4, 40 bytes
Processor Information
        Socket Designation: Node 1 Socket 1
        Type: Central Processor
        Family: Xeon MP
        Manufacturer: Intel(R) Corporation
        ID: C2 06 02 00 FF FB EB BF
        Signature: Type 0, Family 6, Model 44, Stepping 2
        Flags:
                FPU (Floating-point unit on-chip)
                VME (Virtual mode extension)
                DE (Debugging extension)
                PSE (Page size extension)
                TSC (Time stamp counter)
                MSR (Model specific registers)
                PAE (Physical address extension)
                MCE (Machine check exception)
                CX8 (CMPXCHG8 instruction supported)
                APIC (On-chip APIC hardware supported)
                SEP (Fast system call)
                MTRR (Memory type range registers)
                PGE (Page global enable)
                MCA (Machine check architecture)
                CMOV (Conditional move instruction supported)
                PAT (Page attribute table)
                PSE-36 (36-bit page size extension)
                CLFSH (CLFLUSH instruction supported)
                DS (Debug store)
                ACPI (ACPI supported)
                MMX (MMX technology supported)
                FXSR (FXSAVE and FXSTOR instructions supported)
                SSE (Streaming SIMD extensions)
                SSE2 (Streaming SIMD extensions 2)
                SS (Self-snoop)
                HTT (Multi-threading)
                TM (Thermal monitor supported)
                PBE (Pending break enabled)
        Version: Intel(R) Xeon(R) CPU           X5670  @ 2.93GHz
        Voltage: 1.2 V
        External Clock: 6400 MHz
        Max Speed: 4400 MHz
        Current Speed: 2930 MHz
        Status: Populated, Enabled
        Upgrade: ZIF Socket
        L1 Cache Handle: 0x0002
        L2 Cache Handle: 0x0003
        L3 Cache Handle: 0x0004
        Serial Number: Not Specified
        Asset Tag: Not Specified
        Part Number: Not Specified
        Core Count: 6
        Core Enabled: 6
        Thread Count: 12
        Characteristics:
                64-bit capable

Handle 0x0005, DMI type 4, 40 bytes
Processor Information
        Socket Designation: Node 1 Socket 2
        Type: Central Processor
        Family: Xeon MP
        Manufacturer: Intel(R) Corporation
        ID: C2 06 02 00 FF FB EB BF
        Signature: Type 0, Family 6, Model 44, Stepping 2
        Flags:
                FPU (Floating-point unit on-chip)
                VME (Virtual mode extension)
                DE (Debugging extension)
                PSE (Page size extension)
                TSC (Time stamp counter)
                MSR (Model specific registers)
                PAE (Physical address extension)
                MCE (Machine check exception)
                CX8 (CMPXCHG8 instruction supported)
                APIC (On-chip APIC hardware supported)
                SEP (Fast system call)
                MTRR (Memory type range registers)
                PGE (Page global enable)
                MCA (Machine check architecture)
                CMOV (Conditional move instruction supported)
                PAT (Page attribute table)
                PSE-36 (36-bit page size extension)
                CLFSH (CLFLUSH instruction supported)
                DS (Debug store)
                ACPI (ACPI supported)
                MMX (MMX technology supported)
                FXSR (FXSAVE and FXSTOR instructions supported)
                SSE (Streaming SIMD extensions)
                SSE2 (Streaming SIMD extensions 2)
                SS (Self-snoop)
                HTT (Multi-threading)
                TM (Thermal monitor supported)
                PBE (Pending break enabled)
        Version: Intel(R) Xeon(R) CPU           X5670  @ 2.93GHz
        Voltage: 1.2 V
        External Clock: 6400 MHz
        Max Speed: 4400 MHz
        Current Speed: 2930 MHz
        Status: Populated, Enabled
        Upgrade: ZIF Socket
        L1 Cache Handle: 0x0006
        L2 Cache Handle: 0x0007
        L3 Cache Handle: 0x0008
        Serial Number: Not Specified
        Asset Tag: Not Specified
        Part Number: Not Specified
        Core Count: 6
        Core Enabled: 6
        Thread Count: 12
        Characteristics:
                64-bit capable



No comments: