centos 查服务器CPU与内存情况

有时候，我们要统计服务器的硬件信息，除了通过带外查看外，我们还可以通过操作系统层查到CPU与内存信息。

查CPU信息

用lscpu命令，我们可以看到该服务器有2个CPU（Thread(s) per core: 2），每个CPU是20线程(Core(s) per socket: 20)。

CPU型号为Intel(R) Xeon(R) Gold 6138

L3级缓存为55M

[root@web-30 ~]# lscpu 
Architecture: x86_64
CPU op-mode(s): 32-bit, 64-bit
Address sizes: 46 bits physical, 48 bits virtual
Byte Order: Little Endian
CPU(s): 80
On-line CPU(s) list: 0-79
Vendor ID: GenuineIntel
BIOS Vendor ID: Intel(R) Corporation
Model name: Intel(R) Xeon(R) Gold 6138 CPU @ 2.00GHz
BIOS Model name: Intel(R) Xeon(R) Gold 6138 CPU @ 2.00GHz
CPU family: 6
Model: 85
Thread(s) per core: 2
Core(s) per socket: 20
Socket(s): 2
Stepping: 4
CPU(s) scaling MHz: 100%
CPU max MHz: 3700.0000
CPU min MHz: 1000.0000
BogoMIPS: 4000.00
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 pdpe1gb rdtscp lm constant_tsc art arch_perfmon pebs bts rep_good nopl xt
opology nonstop_tsc cpuid aperfmperf pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 sdbg fma cx16 xtpr pdcm pcid dca sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdra
nd lahf_lm abm 3dnowprefetch cpuid_fault epb cat_l3 cdp_l3 pti ssbd mba ibrs ibpb stibp tpr_shadow flexpriority ept vpid ept_ad fsgsbase tsc_adjust bmi1 hle avx2 smep bmi2 erms invpcid rtm cqm mpx rdt_a a
vx512f avx512dq rdseed adx smap clflushopt clwb intel_pt avx512cd avx512bw avx512vl xsaveopt xsavec xgetbv1 xsaves cqm_llc cqm_occup_llc cqm_mbm_total cqm_mbm_local dtherm ida arat pln pts vnmi pku ospke 
md_clear flush_l1d arch_capabilities
Virtualization features: 
Virtualization: VT-x
Caches (sum of all): 
L1d: 1.3 MiB (40 instances)
L1i: 1.3 MiB (40 instances)
L2: 40 MiB (40 instances)
L3: 55 MiB (2 instances)
NUMA: 
NUMA node(s): 2
NUMA node0 CPU(s): 0-19,40-59
NUMA node1 CPU(s): 20-39,60-79
Vulnerabilities: 
Gather data sampling: Mitigation; Microcode
Itlb multihit: KVM: Mitigation: VMX disabled
L1tf: Mitigation; PTE Inversion; VMX conditional cache flushes, SMT vulnerable
Mds: Mitigation; Clear CPU buffers; SMT vulnerable
Meltdown: Mitigation; PTI
Mmio stale data: Mitigation; Clear CPU buffers; SMT vulnerable
Retbleed: Mitigation; IBRS
Spec rstack overflow: Not affected
Spec store bypass: Mitigation; Speculative Store Bypass disabled via prctl
Spectre v1: Mitigation; usercopy/swapgs barriers and __user pointer sanitization
Spectre v2: Mitigation; IBRS, IBPB conditional, STIBP conditional, RSB filling, PBRSB-eIBRS Not affected
Srbds: Not affected
Tsx async abort: Mitigation; Clear CPU buffers; SMT vulnerable

查内存信息

先安装dmidecode软件

[root@db-31 ~]# yum install -y dmidecode

查内存信息命令为dmidecode -t memory | grep “GB”

从返回的信息，我们可以看到，服务器插了2条内存，每条内存为32G。

[root@db-31 ~]# dmidecode -t memory | grep "GB"
Size: 32 GB
Volatile Size: 32 GB
Size: 32 GB
Volatile Size: 32 GB