以前在 Linux 上想跑类似的测试一直找不到比较方便直观的，自己用 intel 的 mlc 工具弄了个类似的写了个脚本。 大家需要测服务器内存带宽的时候可以用用。同时支持 Linux 和 Win （ powershell ）。方便各位做 DevOps 之类的排障测试用。

https://github.com/Purestreams/linux-mlc-bench

  ╔══════════════════════════════════════════════════╗
  ║     Cache & Memory Benchmark  (Intel MLC)        ║
  ║                           By @Purestreams        ║
  ╚══════════════════════════════════════════════════╝


━━━  System Information  ━━━
  Hostname                       epyc-pve
  OS                             Debian GNU/Linux 12 (bookworm)
  Kernel                         6.8.12-15-pve
  Architecture                   x86_64
  Virtualization                 none
  Uptime                         up 5 weeks, 6 days, 19 hours, 29 minutes
  NUMA Nodes                     1
  Root Disk                      94G total, 59G used, 31G avail
  CPU Freq Governor              performance

━━━  CPU Information  ━━━
  CPU Model                      AMD EPYC 7532 32-Core Processor
  Physical Cores                 32
  Logical CPUs                   64
  Max Frequency                  2400.0 MHz
  CPU Family / Model / Stepping  23 / 49 / 0
  L2 Cache                       16 MiB (32 instances)
  L3 Cache                       256 MiB (16 instances)

━━━  Memory Information  ━━━
  Memory Total                   125.6 GiB
  Memory Type                    DDR4 (Synchronous Registered (Buffered))
  Configured Speed               2667 MT/s
  Rated Speed                    2133 MT/s
  DIMMs Installed                8 x 16 GB (8 slots total)
  Manufacturer                   Micron
  Part Number                    36ASF2G72PZ-2G1A2
  ECC                            Multi-bit ECC
  Channels In Use                8

  Locator      Size       Bank                           Manufacturer
  ────────────────────────────────────────────────────────────────────
  DIMMA1       16 GB      P0_Node0_Channel0_Dimm0        Micron
  DIMMB1       16 GB      P0_Node0_Channel1_Dimm0        Micron
  DIMMC1       16 GB      P0_Node0_Channel2_Dimm0        Micron
  DIMMD1       16 GB      P0_Node0_Channel3_Dimm0        Micron
  DIMME1       16 GB      P0_Node0_Channel4_Dimm0        Micron
  DIMMF1       16 GB      P0_Node0_Channel5_Dimm0        Micron
  DIMMG1       16 GB      P0_Node0_Channel6_Dimm0        Micron
  DIMMH1       16 GB      P0_Node0_Channel7_Dimm0        Micron

━━━  Setting Up Intel MLC  ━━━
  Downloading MLC from Intel...
  MLC ready: /tmp/mlc_bench_2447652/Linux/mlc

━━━  Memory & Cache Bandwidth  ━━━
  Level                                    Read        Write         Copy
  ──────────────────────────────────────────────────────────────────────
  Memory (DRAM)                      133.3 GB/s   127.0 GB/s   128.6 GB/s
  L1 Cache                          2800.7 GB/s   114.6 GB/s   385.4 GB/s
  L2 Cache                          1814.4 GB/s   124.2 GB/s   371.2 GB/s
  L3 Cache                           132.6 GB/s   127.2 GB/s   128.5 GB/s

━━━  Memory & Cache Latency  ━━━
  Level                                 Latency
  ──────────────────────────────────────────────
  L1 Cache                               1.2    ns
  L2 Cache                               7.4    ns
  L3 Cache                              13.4    ns
  Memory (DRAM)                        130.7    ns

━━━  Full Idle Latency Sweep (Buffer Size → Latency)  ━━━
           16K   1.2    ns
           64K   3.7    ns
          256K   4.4    ns
            1M   12.3   ns
            4M   13.3   ns
           16M   67.5   ns
           64M   129.8  ns
          256M   131.8  ns

━━━  Done  ━━━
  Elapsed time: 3m 14s
  Benchmark complete.