Linux使用dmidecode来查看机器有几根内存插槽，哪个槽上有内存

直接输入dmidecode即可，输出有很多，好像是根据SM总线来查询的，包括能查询到BIOS的地址空间和其中的信息等等，内存信息只是其中的一部分。摘录如下：Handle 0x001C
DMI type 16, 15 bytes.
Physical Memory Array
Location: System Board Or Motherboard
Use: System Memory
Error Correction Type: None
Maximum Capacity: 4 GB
Error Information Handle: Not Provided
Number Of Devices: 4
Handle 0x001D
DMI type 17, 21 bytes.
Memory Device
Array Handle: 0x001C
Error Information Handle: Not Provided
Total Width: Unknown
Data Width: Unknown
Size: No Module Installed
Form Factor: DIMM
Set: None
Locator: A0
Bank Locator: Bank0/1
Type: Unknown
Type Detail: Unknown
Handle 0x001E
DMI type 17, 21 bytes.
Memory Device
Array Handle: 0x001C
Error Information Handle: Not Provided
Total Width: Unknown
Data Width: Unknown
Size: No Module Installed
Form Factor: DIMM
Set: None
Locator: A1
Bank Locator: Bank2/3
Type: Unknown
Type Detail: Unknown
Handle 0x001F
DMI type 17, 21 bytes.
Memory Device
Array Handle: 0x001C
Error Information Handle: Not Provided
Total Width: 64 bits
Data Width: 64 bits
Size: 512 MB
Form Factor: DIMM
Set: None
Locator: A2
Bank Locator: Bank4/5
Type: SDRAM
Type Detail: Synchronous
Handle 0x0020
DMI type 17, 21 bytes.
Memory Device
Array Handle: 0x001C
Error Information Handle: Not Provided
Total Width: Unknown
Data Width: Unknown
Size: No Module Installed
Form Factor: DIMM
Set: None
Locator: A3
Bank Locator: Bank6/7
Type: Unknown
Type Detail: Unknown

从这段输出可以看出，第一个Physical Memory Array是总体的内存信息，从这里可以看到有四个内存插槽、机器最大支持的内存总量等。然后下面开始就是每个内存插槽的情况，在这里可以看到，第三个内存插槽上插了一根512M的内存。

更多的信息请参考dmidecode的手册。