測試環境為 Ubuntu 16.04 x86_64 .
在 Linux 下,幾個常用來檢視 CPU 資訊的指令.
/proc/cpuinfo
直接看 /proc/ 是最簡單,最快的方式.
root@ubuntu:~# cat /proc/cpuinfo processor : 0 vendor_id : GenuineIntel cpu family : 6 model : 23 model name : Intel(R) Xeon(R) CPU X3320 @ 2.50GHz stepping : 10 microcode : 0xa07 cpu MHz : 2500.000 cache size : 3072 KB physical id : 0 siblings : 4 core id : 0 cpu cores : 4 apicid : 0 initial apicid : 0 fpu : yes fpu_exception : yes cpuid level : 13 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx lm constant_tsc arch_perfmon pebs bts rep_good nopl aperfmperf pni dtes64 monitor ds_cpl vmx smx est tm2 ssse3 cx16 xtpr pdcm sse4_1 xsave lahf_lm tpr_shadow vnmi flexpriority dtherm bugs : bogomips : 5000.30 clflush size : 64 cache_alignment : 64 address sizes : 36 bits physical, 48 bits virtual power management: ...
dmidecode
透過 dmidecode 來查看存放在 SMBIOS 的 Flash Rom 空間中儲存的硬體資訊.
root@ubuntu:~# dmidecode -t processor # dmidecode 3.0 Getting SMBIOS data from sysfs. SMBIOS 2.5 present. Handle 0x0004, DMI type 4, 40 bytes Processor Information Socket Designation: LGA 775 Type: Central Processor Family: Xeon Manufacturer: Intel ID: 7A 06 01 00 FF FB EB BF Signature: Type 0, Family 6, Model 23, Stepping 10 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 X3320 @ 2.50GHz Voltage: 1.2 V External Clock: 333 MHz Max Speed: 3300 MHz Current Speed: 2500 MHz Status: Populated, Enabled Upgrade: Socket LGA775 L1 Cache Handle: 0x0005 L2 Cache Handle: 0x0006 L3 Cache Handle: Not Provided Serial Number: None Asset Tag: No Asset Tag Part Number: None Core Count: 4 Core Enabled: 4 Thread Count: 4 Characteristics: 64-bit capable
root@ubuntu:~# dmidecode -t cache # dmidecode 3.0 Getting SMBIOS data from sysfs. SMBIOS 2.5 present. Handle 0x0005, DMI type 7, 19 bytes Cache Information Socket Designation: L1 Cache Configuration: Enabled, Socketed, Level 1 Operational Mode: Write Back Location: Internal Installed Size: 64 kB Maximum Size: 64 kB Supported SRAM Types: Burst Pipeline Burst Asynchronous Installed SRAM Type: Burst Speed: Unknown Error Correction Type: Unknown System Type: Unknown Associativity: Unknown Handle 0x0006, DMI type 7, 19 bytes Cache Information Socket Designation: L2 Cache Configuration: Enabled, Socketed, Level 2 Operational Mode: Write Back Location: Internal Installed Size: 6144 kB Maximum Size: 6144 kB Supported SRAM Types: Burst Pipeline Burst Asynchronous Installed SRAM Type: Burst Speed: Unknown Error Correction Type: Unknown System Type: Unknown Associativity: Unknown
lscpu
也可以直接透過 lscpu 指令來查詢.
root@ubuntu:~# lscpu Architecture: x86_64 CPU op-mode(s): 32-bit, 64-bit Byte Order: Little Endian CPU(s): 4 On-line CPU(s) list: 0-3 Thread(s) per core: 1 Core(s) per socket: 4 Socket(s): 1 NUMA node(s): 1 Vendor ID: GenuineIntel CPU family: 6 Model: 23 Model name: Intel(R) Xeon(R) CPU X3320 @ 2.50GHz Stepping: 10 CPU MHz: 2500.000 CPU max MHz: 2500.0000 CPU min MHz: 2000.0000 BogoMIPS: 5000.30 Virtualization: VT-x L1d cache: 32K L1i cache: 32K L2 cache: 3072K NUMA node0 CPU(s): 0-3 Flags: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx lm constant_tsc arch_perfmon pebs bts rep_good nopl aperfmperf pni dtes64 monitor ds_cpl vmx smx est tm2 ssse3 cx16 xtpr pdcm sse4_1 xsave lahf_lm tpr_shadow vnmi flexpriority dtherm
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