AMD CPU 缓存

• CPU逻辑核总数

# nproc --all
128

# lscpu

L1d 缓存：       32K
L1i 缓存：       32K
L2 缓存：        512K
L3 缓存：        16384K

# dmidecode -t cache
# dmidecode 3.1
Getting SMBIOS data from sysfs.
SMBIOS 3.2.0 present.
# SMBIOS implementations newer than version 3.1.1 are not
# fully supported by this version of dmidecode.

Handle 0x000C, DMI type 7, 27 bytes
Cache Information
	Socket Designation: L1 - Cache
	Configuration: Enabled, Not Socketed, Level 1
	Operational Mode: Write Back
	Location: Internal
	Installed Size: 4096 kB								  缓存大小
	Maximum Size: 4096 kB								   4MB
	Supported SRAM Types:
		Pipeline Burst
	Installed SRAM Type: Pipeline Burst
	Speed: 1 ns
	Error Correction Type: Multi-bit ECC
	System Type: Unified
	Associativity: 8-way Set-associative

Handle 0x000D, DMI type 7, 27 bytes
Cache Information
	Socket Designation: L2 - Cache
	Configuration: Enabled, Not Socketed, Level 2
	Operational Mode: Write Back
	Location: Internal
	Installed Size: 32768 kB									
	Maximum Size: 32768 kB								32MB
	Supported SRAM Types:
		Pipeline Burst
	Installed SRAM Type: Pipeline Burst
	Speed: 1 ns
	Error Correction Type: Multi-bit ECC
	System Type: Unified
	Associativity: 8-way Set-associative

Handle 0x000E, DMI type 7, 27 bytes
Cache Information
	Socket Designation: L3 - Cache
	Configuration: Enabled, Not Socketed, Level 3
	Operational Mode: Write Back
	Location: Internal
	Installed Size: 262144 kB
	Maximum Size: 262144 kB								256MB 	
	Supported SRAM Types:
		Pipeline Burst
	Installed SRAM Type: Pipeline Burst
	Speed: 1 ns
	Error Correction Type: Multi-bit ECC
	System Type: Unified
	Associativity: 16-way Set-associative

# lshw -C memory

  *-cache:0
       description: L1 cache
       physical id: c
       slot: L1 - Cache
       size: 4MiB
       capacity: 4MiB
       clock: 1GHz (1.0ns)
       capabilities: pipeline-burst internal write-back unified
       configuration: level=1
  *-cache:1
       description: L2 cache
       physical id: d
       slot: L2 - Cache
       size: 32MiB
       capacity: 32MiB
       clock: 1GHz (1.0ns)
       capabilities: pipeline-burst internal write-back unified
       configuration: level=2
  *-cache:2
       description: L3 cache
       physical id: e
       slot: L3 - Cache
       size: 256MiB
       capacity: 256MiB
       clock: 1GHz (1.0ns)
       capabilities: pipeline-burst internal write-back unified
       configuration: level=3

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参考：

1. 【Linux基础】查看硬件信息-CPU
2. AMD Ryzen™ Threadripper™ 3990X
3. CPU Cache 机制以及 Cache miss
4. 有什么方法可以知道Linux中L1，L2，L3缓存和RAM的大小吗？