如何检查内存延迟？

Question

我需要购买新的内存。

• 首先我需要知道速度>>完成
• 其次，我需要知道延迟>>如何？

我从谷歌尝试的所有内容。

dmidecode --type memory
dmidecode 2.11
dd if=/dev/zero of=/dev/sda2 bs=1G count=1 oflag=direct 
apt-get install hardinfo
apt-get install sysinfo
cat /proc/meminfo
cat /var/log/dmesg | grep Memory
decode-dimms
update-pciids
lshw -C memory | grep clock
apt-get install lshw
lshw -C memory

Answer 1

什么是延迟？

计算机 RAM 与其处理器之间传输数据的延迟。由于与计算机处理器相比，RAM 不一定很快，因此可能会出现 RAM 延迟，从而导致计算机硬件识别出需要 RAM 访问（发起数据请求）的时间与数据或指令可用于执行的时间之间存在延迟。处理器。如果 CPU 请求的数据未存储在缓存中，那么它将必须等待 RAM 检索数据，从而导致延迟问题。

哪里可以检查 RAM 的延迟？

对于Ubuntu安装包 i2c-tools并运行

sudo modprobe eeprom
decode-dimms

来源：Ubuntu 论坛和主要来源

我希望它能帮助你。

Answer 2

请使用命令1：

sudo dmidecode -t 17 or dmidecode -t memory

命令 1 的输出：

# dmidecode 2.11
SMBIOS 2.6 present.

Handle 0x000E, DMI type 17, 28 bytes
Memory Device
    Array Handle: 0x000D
    Error Information Handle: No Error
    Total Width: 64 bits
    Data Width: 64 bits
    Size: 2048 MB
    Form Factor: SODIMM
    Set: 1
    Locator: M1
    Bank Locator: Bank 0
    Type: DDR3
    Type Detail: Synchronous
    Speed: 1334 MHz
    Manufacturer: 830B            
    Serial Number: DBC8287D        
    Asset Tag: 1012
    Part Number: NT2GC64B8HC0NS-CG 
    Rank: Unknown
---------------------------------------
output command 2


# dmidecode 2.11
SMBIOS 2.6 present.

Handle 0x000D, DMI type 16, 15 bytes
Physical Memory Array
    Location: System Board Or Motherboard
    Use: System Memory
    Error Correction Type: None
    Maximum Capacity: 16 GB
    Error Information Handle: Not Provided
    Number Of Devices: 4

Handle 0x000E, DMI type 17, 28 bytes
Memory Device
    Array Handle: 0x000D
    Error Information Handle: No Error
    Total Width: 64 bits
    Data Width: 64 bits
    Size: 2048 MB
    Form Factor: SODIMM
    Set: 1
    Locator: M1
    Bank Locator: Bank 0
    Type: DDR3
    Type Detail: Synchronous
    Speed: 1334 MHz
    Manufacturer: 830B            
    Serial Number: DBC8287D        
    Asset Tag: 1012
    Part Number: NT2GC64B8HC0NS-CG 
    Rank: Unknown

Handle 0x000F, DMI type 17, 28 bytes
Memory Device
    Array Handle: 0x000D
    Error Information Handle: No Error
    Total Width: 64 bits
    Data Width: 64 bits
    Size: 4096 MB
    Form Factor: SODIMM
    Set: 1
    Locator: M2
    Bank Locator: Bank 1
    Type: DDR3
    Type Detail: Synchronous
    Speed: 1334 MHz
    Manufacturer: 0198            
    Serial Number: A30EEB39        
    Asset Tag: 1044
    Part Number: 9905428-012.A00LF 
    Rank: Unknown

Handle 0x0010, DMI type 17, 28 bytes
Memory Device
    Array Handle: 0x000D
    Error Information Handle: No Error
    Total Width: Unknown
    Data Width: Unknown
    Size: No Module Installed
    Form Factor: SODIMM
    Set: 1
    Locator: M3
    Bank Locator: Bank 2
    Type: DDR3
    Type Detail: Synchronous
    Speed: Unknown
    Manufacturer:                 
    Serial Number:                 
    Asset Tag:     
    Part Number:                   
    Rank: Unknown

Handle 0x0011, DMI type 17, 28 bytes
Memory Device
    Array Handle: 0x000D
    Error Information Handle: No Error
    Total Width: Unknown
    Data Width: Unknown
    Size: No Module Installed
    Form Factor: SODIMM
    Set: 1
    Locator: M4
    Bank Locator: Bank 3
    Type: DDR3
    Type Detail: Synchronous
    Speed: Unknown
    Manufacturer:                 
    Serial Number:                 
    Asset Tag:     
    Part Number:                   
    Rank: Unknown