View System configuration under Linux

Cpu

1. LSCPU: Display CPU Architecture information

[[Email protected] ~]$ lscpuarchitecture:x86_64cpu op-mode (s): +-bit, --bitbyte order:little endiancpu (s):4 #总处理器核心数量 on-line CPU (s) List:0-3Thread (s) per core:1 #每个核心支持的线程数量. 1 means only one thread is supported, that is, hyper-threading is not supportedCore (s) per socket:1 #每个处理器的核心数量Socket (s):4 #处理器数量NUMA Node (s):1Vendor id:genuineintelcpu Family:6Model: theStepping:0CPU MHz:2599.998bogomips:5199.99Hypervisor vendor:vmware #管理程序供应商Virtualization type:fulll1d cache:32kl1i cache: 32KL2 cache:256kl3 Cache:30720knuma node0 CPU (s):0-3

Total Processor cores = number of processors * Number of cores per processor * Number of threads supported per core. That is: CPU (s) = Socket (s) * Core (s) * Thread (s).

Let's look at how the man describes it:

Mans lscpu   COLUMNS CPU The logical CPU number of    a CPU as used by the Linux kernel. #逻辑CPU数量       Core The   logical core number.　　　　　　A core can contain several CPUs. #逻辑核心数量       Socket The logical socket number.　　　A socket can contain several cores. Number of #逻辑插槽 (road)

2. Cat/proc/cpuinfo: View CPU Details

[Email protected] ~]$Cat/proc/Cpuinfo Processor:0VENDOR_ID:GENUINEINTELCPU Family:6Model: theModel Name:intel (R) Xeon (r) CPU E5-2690V3 @2. 60GHzstepping:0CPU MHz:2599.998Cache Size:30720KBfpu:yesfpu_exception:yescpuid Level: -wp:yesflags:fpu vme de PSE TSC MSR PAE MCE cx8 APIC Sep MTRR PGE MCA cmov Pat PSE36 Clflush DTS MMX FXSR SSE SSE2 SS Syscall NX rdtscp LM constant_tsc Arch_perfmon pebs BTS xtopology tsc_reliable nonstop_tsc aperf Mperf unfair_spinlock pni pclmulqdq ssse3 FMA cx16 sse4_1 sse4_2 movbe popcnt AES Xsave AVX hypervisor lahf_lm Ida Arat EP b PLN pts dtsbogomips:5199.99Clflush Size: -cache_alignment: -Address sizes: +Bits physical, -bits virtualpower management:processor:1VENDOR_ID:GENUINEINTELCPU Family:6Model: theModel Name:intel (R) Xeon (r) CPU E5-2690V3 @2. 60GHzstepping:0CPU MHz:2599.998Cache Size:30720KBfpu:yesfpu_exception:yescpuid Level: -wp:yesflags:fpu vme de PSE TSC MSR PAE MCE cx8 APIC Sep MTRR PGE MCA cmov Pat PSE36 Clflush DTS MMX FXSR SSE SSE2 SS Syscall NX rdtscp LM constant_tsc Arch_perfmon pebs BTS xtopology tsc_reliable nonstop_tsc aperf Mperf unfair_spinlock pni pclmulqdq ssse3 FMA cx16 sse4_1 sse4_2 movbe popcnt AES Xsave AVX hypervisor lahf_lm Ida Arat EP b PLN pts dtsbogomips:5199.99Clflush Size: -cache_alignment: -Address sizes: +Bits physical, -bits virtualpower management:processor:2VENDOR_ID:GENUINEINTELCPU Family:6Model: theModel Name:intel (R) Xeon (r) CPU E5-2690V3 @2. 60GHzstepping:0CPU MHz:2599.998Cache Size:30720KBfpu:yesfpu_exception:yescpuid Level: -wp:yesflags:fpu vme de PSE TSC MSR PAE MCE cx8 APIC Sep MTRR PGE MCA cmov Pat PSE36 Clflush DTS MMX FXSR SSE SSE2 SS Syscall NX rdtscp LM constant_tsc Arch_perfmon pebs BTS xtopology tsc_reliable nonstop_tsc aperf Mperf unfair_spinlock pni pclmulqdq ssse3 FMA cx16 sse4_1 sse4_2 movbe popcnt AES Xsave AVX hypervisor lahf_lm Ida Arat EP b PLN pts dtsbogomips:5199.99Clflush Size: -cache_alignment: -Address sizes: +Bits physical, -bits virtualpower management:processor:3VENDOR_ID:GENUINEINTELCPU Family:6Model: theModel Name:intel (R) Xeon (r) CPU E5-2690V3 @2. 60GHzstepping:0CPU MHz:2599.998Cache Size:30720KBfpu:yesfpu_exception:yescpuid Level: -wp:yesflags:fpu vme de PSE TSC MSR PAE MCE cx8 APIC Sep MTRR PGE MCA cmov Pat PSE36 Clflush DTS MMX FXSR SSE SSE2 SS Syscall NX rdtscp LM constant_tsc Arch_perfmon pebs BTS xtopology tsc_reliable nonstop_tsc aperf Mperf unfair_spinlock pni pclmulqdq ssse3 FMA cx16 sse4_1 sse4_2 movbe popcnt AES Xsave AVX hypervisor lahf_lm Ida Arat EP b PLN pts dtsbogomips:5199.99Clflush Size: -cache_alignment: -Address sizes: +Bits physical, -bits Virtualpower Management:

With this output, there is a lot of content and it looks like a bit confusing. We can use a few commands to view the information we want to know:

# View the number of physical CPUsCat/proc/cpuinfo |grep "Physical ID"|Sort|Uniq# See the number of cores in each physical CPU (that is, the number of nuclei)Cat/proc/cpuinfo |grep "CPU Cores"|Uniq# See the number of threads per physical CPUCat/proc/cpuinfo |grep "siblings"|Uniq# View the number of logical CPUsCat/proc/cpuinfo|grep "Processor"# View CPU ModelsCat/proc/cpuinfo |grep "model name"|Uniq

Memory

View/proc/meminfo or use the free command. The free command is the information obtained from the Meminfo. In general, use free to get the information we want to know:

 free-m             total       used       free     shared    buffers     Cachedmem:           7868        954       6914                    0         619-/+ Buffers/cache:        271       7597Swap:         4031          0       4031

As you can see, the memory size is 8G.

Hard disk

1. LSBLK:BLK is the abbreviation for block. List block devices

[[Email protected] ~]$ lsblkname maj:min RM SIZE RO TYPE MOUNTPOINTsr0 One:0    11024M0ROM SDB8: -   0100G0DISK└─SDB18: -   0100G0Part/DATASDA8:0    060G0disk├─sda18:1    0500M0Part/boot└─sda28:2    0  -.5G0Part├─volgroup-lv_root (dm-0)253:0    050G0LVM/├─volgroup-lv_swap (dm-1)253:1    04G0LVM [Swap]└─volgroup-lv_home (dm-2)253:2    0  5.6G0Lvm/home

Where Type=disk represents the hard drive. It can be seen that the hard disk is divided into SDA and SDB, altogether 160G.

2. DF: View Hard Drive usage

[Email protected] ~]$DF-hfilesystem Size used Avail use%mounted on/dev/mapper/volgroup-lv_root 50G1.7G 46G4% /Tmpfs3.9G0  3.9G0%/dev/SHM/DEV/SDA1 485M 39M 421M9% /Boot/dev/mapper/volgroup-lv_home5.5G 165M5.1G4% /Home/DEV/SDB1 99G 188M 94G1%/data

The size of all the rows is added together, it can also approximate the hard disk sizes.

Reference:

1. Baidu Encyclopedia Introduction to Hyper-threading, dual-core, dual CPU in dual CPU: Dual CPU

2. CSDN Blog:View CPU information under Linux [/proc/cpuinfo]

3. CSDN Blog: Processor CPU concept and CPU multithreading

4. Blog Park Blog: Linux View System hardware information (detailed example)

View System configuration under Linux