app/notes/20181109-0830.md
Likwid
likwid
1541752223
I found a neat tool that digs into your CPU setup called [likwid](https://github.com/RRZE-HPC/likwid).
This is the topology for this server:
```text
$ likwid-topology
--------------------------------------------------------------------------------
CPU name: Intel(R) Core(TM) i5-4570 CPU @ 3.20GHz
CPU type: Intel Core Haswell processor
CPU stepping: 3
********************************************************************************
Hardware Thread Topology
********************************************************************************
Sockets: 1
Cores per socket: 4
Threads per core: 1
--------------------------------------------------------------------------------
HWThread Thread Core Socket Available
0 0 0 0 *
1 0 1 0 *
2 0 2 0 *
3 0 3 0 *
--------------------------------------------------------------------------------
Socket 0: ( 0 1 2 3 )
--------------------------------------------------------------------------------
********************************************************************************
Cache Topology
********************************************************************************
Level: 1
Size: 32 kB
Cache groups: ( 0 ) ( 1 ) ( 2 ) ( 3 )
--------------------------------------------------------------------------------
Level: 2
Size: 256 kB
Cache groups: ( 0 ) ( 1 ) ( 2 ) ( 3 )
--------------------------------------------------------------------------------
Level: 3
Size: 6 MB
Cache groups: ( 0 1 2 3 )
--------------------------------------------------------------------------------
********************************************************************************
NUMA Topology
********************************************************************************
NUMA domains: 1
--------------------------------------------------------------------------------
Domain: 0
Processors: ( 0 1 2 3 )
Distances: 10
Free memory: 4729.45 MB
Total memory: 15710.8 MB
--------------------------------------------------------------------------------
```