相同的物理内核不同的 NUMA 节点

Same physical core different NUMA node

按照在我的 AMD Opteron(TM) 处理器 6234 上识别哪些逻辑内核共享相同物理内核的步骤,我发现共享相同物理内核的 2 个逻辑内核不在同一个 NUMA 节点中。

我的步骤是 lscpu 以获得 NUMA 节点相关核心:

Architecture:          x86_64
CPU op-mode(s):        32-bit, 64-bit
Byte Order:            Little Endian
CPU(s):                24
On-line CPU(s) list:   0-23
Thread(s) per core:    2
Core(s) per socket:    6
Socket(s):             2
NUMA node(s):          4
Vendor ID:             AuthenticAMD
CPU family:            21
Model:                 1
Model name:            AMD Opteron(TM) Processor 6234
Stepping:              2
CPU MHz:               1400.000
CPU max MHz:           2400.0000
CPU min MHz:           1400.0000
BogoMIPS:              4799.98
Virtualization:        AMD-V
L1d cache:             16K
L1i cache:             64K
L2 cache:              2048K
L3 cache:              6144K
NUMA node0 CPU(s):     0-5
NUMA node1 CPU(s):     6-11
NUMA node2 CPU(s):     12-17
NUMA node3 CPU(s):     18-23

然后 cat /proc/cpuinfo | grep "core id" 以对核心进行分组:

core id         : 0
core id         : 1
core id         : 2
core id         : 3
core id         : 4
core id         : 5
core id         : 0
core id         : 1
core id         : 2
core id         : 3
core id         : 4
core id         : 5
core id         : 0
core id         : 1
core id         : 2
core id         : 3
core id         : 4
core id         : 5
core id         : 0
core id         : 1
core id         : 2
core id         : 3
core id         : 4
core id         : 5

最后 cat /proc/cpuinfo | grep "physical id" 以获得共享相同核心 ID 和相同物理的核心 CPU:

physical id     : 0
physical id     : 0
physical id     : 0
physical id     : 0
physical id     : 0
physical id     : 0
physical id     : 0
physical id     : 0
physical id     : 0
physical id     : 0
physical id     : 0
physical id     : 0
physical id     : 1
physical id     : 1
physical id     : 1
physical id     : 1
physical id     : 1
physical id     : 1
physical id     : 1
physical id     : 1
physical id     : 1
physical id     : 1
physical id     : 1
physical id     : 1

由此我得出结论,核心 0 和 6 共享相同的物理核心,但是核心 0 在 NUMA 节点 0 中,核心 6 在 NUMA 节点 1 中。

我觉得很烦人,可以吗?

提前感谢您的帮助。

对于皓龙 6234,每个封装内有 2 个裸片,每个裸片都是一个 NUMA 节点,每个裸片有 6 个内核。没有 SMT(超线程),因此每个内核只有一个 CPU。

您期望的是:

 CPU_number = package:die_in_package:core_in_die:CPU_in_core, NUMA node
 0 = 0:0:0:0, NUMA node 0
 1 = 0:0:1:0, NUMA node 0
 2 = 0:0:2:0, NUMA node 0
 3 = 0:0:3:0, NUMA node 0
 4 = 0:0:4:0, NUMA node 0
 5 = 0:0:5:0, NUMA node 0
 6 = 0:1:0:0, NUMA node 1
 7 = 0:1:1:0, NUMA node 1
 8 = 0:1:2:0, NUMA node 1
 9 = 0:1:3:0, NUMA node 1
10 = 0:1:4:0, NUMA node 1
11 = 0:1:5:0, NUMA node 1
12 = 1:0:0:0, NUMA node 1
13 = 1:0:1:0, NUMA node 2
14 = 1:0:2:0, NUMA node 2
15 = 1:0:3:0, NUMA node 2
16 = 1:0:4:0, NUMA node 2
17 = 1:0:5:0, NUMA node 2
18 = 1:1:0:0, NUMA node 3
19 = 1:1:1:0, NUMA node 3
20 = 1:1:2:0, NUMA node 3
21 = 1:1:3:0, NUMA node 3
22 = 1:1:4:0, NUMA node 3
24 = 1:1:5:0, NUMA node 3

现在看CPU0号和CPU6号,它们的包号相同,NUMA节点相同,"CPU in die";但他们有不同的模具编号。 None 你得到的信息提到 "die numbers",这就是你感到困惑的原因。