0 前言
在Linux中，获取cpu信息的命令很多，除了我们已经研究的 cat /proc/cpuinfo、lscpu、nproc、hwinfo –cpu 命令，还有 lshw命令。
1 lshw命令的功能
lshw命令源自英文list hardware，即列出系统的硬件信息，这些硬件包括cpu、内存、硬盘、pci设备等等。今天我们主要是使用 lshw命令查询cpu信息。
[purpleendurer @ bash ~ ]lshw --help
Hardware Lister (lshw) - B.02.17
usage: lshw [-format] [-options ...]
lshw -version
-version print program version (B.02.17)
format can be
-html output hardware tree as HTML
-xml output hardware tree as XML
-short output hardware paths
-businfo output bus information
options can be
-class CLASS only show a certain class of hardware
-C CLASS same as '-class CLASS'
-c CLASS same as '-class CLASS'
-disable TEST disable a test (like pci, isapnp, cpuid, etc. )
-enable TEST enable a test (like pci, isapnp, cpuid, etc. )
-quiet don't display status
-sanitize sanitize output (remove sensitive information like serial numbers, etc.)
-numeric output numeric IDs (for PCI, USB, etc.)
[purpleendurer @ bash ~ ]
2 使用lshw命令查询cpu信息
2.1 lshw -C cpu：查询cpu信息
[purpleendurer @ bash ~ ]lshw -C cpu
WARNING: you should run this program as super-user.
*-cpu:0
physical id: 7
bus info: cpu@0
size: 2600MHz
capacity: 2600MHz
capabilities: fp asimd evtstrm aes pmull sha1 sha2 crc32 cpufreq
*-cpu:1
physical id: 8
bus info: cpu@1
size: 2600MHz
capacity: 2600MHz
capabilities: fp asimd evtstrm aes pmull sha1 sha2 crc32 cpufreq
*-cpu:2
physical id: 9
bus info: cpu@2
size: 2600MHz
capacity: 2600MHz
capabilities: fp asimd evtstrm aes pmull sha1 sha2 crc32 cpufreq
*-cpu:3
physical id: a
bus info: cpu@3
size: 2600MHz
capacity: 2600MHz
capabilities: fp asimd evtstrm aes pmull sha1 sha2 crc32 cpufreq
WARNING: output may be incomplete or inaccurate, you should run this program as super-user.
[purpleendurer @ bash ~ ]
这是关于某个 CPU 的信息。具体含义如下：
| 序号 | 信息 | 含义 |
|---|---|---|
| 1 | -cpu:0 | CPU编号：表示这是第一个 CPU |
| 2 | physical id: 7 | 物理 ID是 7 |
| 3 | bus info: cpu@0 | 总线信息 |
| 4 | size: 2600MHz | 尺寸是 2600MHz，即主频为 2.6GHz |
| 5 | capacity: 2600MHz | 容量也是 2600MHz，即主频为 2.6GHz |
| 6 | capabilities: fp asimd evtstrm aes pmull sha1 sha2 crc32 cpufreq | 功能：包括 fp（浮点运算）、asimd（SIMD指令集）、evtstrm（事件跟踪）、aes（AES加密指令集）、pmull（多项式乘法）、sha1（SHA-1散列函数加速）、sha2（SHA-2散列函数加速）、crc32（CRC32校验）、cpufreq（CPU频率调节） |
2.2 lshw -C cpu -short：查询和显示简短cpu信息
[purpleendurer @ bash ~ ]lshw -C cpu -short
WARNING: you should run this program as super-user.
H/W path Device Class Description
==============================================
/0/7 processor
/0/8 processor
/0/9 processor
/0/a processor
WARNING: output may be incomplete or inaccurate, you should run this program as super-user.
[purpleendurer @ bash ~ ]
2.3 lshw -C cpu -short：查询并以xml格式显示cpu信息
[purpleendurer @ bash ~ ]lshw -C cpu -xml
WARNING: you should run this program as super-user.
7
cpu@0
2600000000
2600000000
Floating point instructions
Advanced SIMD
Event stream
AES instructions
PMULL instruction
SHA1 instructions
SHA2 instructions
CRC extension
CPU Frequency scaling
8
cpu@1
2600000000
2600000000
Floating point instructions
Advanced SIMD
Event stream
AES instructions
PMULL instruction
SHA1 instructions
SHA2 instructions
CRC extension
CPU Frequency scaling
9
cpu@2
2600000000
2600000000
Floating point instructions
Advanced SIMD
Event stream
AES instructions
PMULL instruction
SHA1 instructions
SHA2 instructions
CRC extension
CPU Frequency scaling
a
cpu@3
2600000000
2600000000
Floating point instructions
Advanced SIMD
Event stream
AES instructions
PMULL instruction
SHA1 instructions
SHA2 instructions
CRC extension
CPU Frequency scaling
WARNING: output may be incomplete or inaccurate, you should run this program as super-user.
[purpleendurer @ bash ~ ]
2.4 lshw -C cpu -html：查询并以htm格式显示cpu信息
[purpleendurer @ bash ~ ]lshw -C cpu -html
WARNING: you should run this program as super-user.
.first {font-weight: bold; margin-left: none; padding-right: 1em;vertical-align: top; }
.second {padding-left: 1em; width: 100%; vertical-align: center; }
.id {font-family: monospace;}
.indented {margin-left: 2em; border-left: dotted thin #dde; padding-bottom: 1em; }
.node {border: solid thin #ffcc66; padding: 1em; background: #ffffcc; }
.node-unclaimed {border: dotted thin #c3c3c3; padding: 1em; background: #fafafa; color: red; }
.node-disabled {border: solid thin #f55; padding: 1em; background: #fee; color: gray; }
gxxc-ce3000f
id: cpu:0 physical id: 7 bus info: cpu@0 size: 2600MHz capacity: 2600MHz capabilities: fp asimd evtstrm aes pmull sha1 sha2 crc32 cpufreq
id: cpu:1 physical id: 8 bus info: cpu@1 size: 2600MHz capacity: 2600MHz capabilities: fp asimd evtstrm aes pmull sha1 sha2 crc32 cpufreq
id: cpu:2 physical id: 9 bus info: cpu@2 size: 2600MHz capacity: 2600MHz capabilities: fp asimd evtstrm aes pmull sha1 sha2 crc32 cpufreq
id: cpu:3 physical id: a bus info: cpu@3 size: 2600MHz capacity: 2600MHz capabilities: fp asimd evtstrm aes pmull sha1 sha2 crc32 cpufreq
WARNING: output may be incomplete or inaccurate, you should run this program as super-user.
[purpleendurer @ bash ~ ]
