How CPU / NUMA Topology
The basis functionality of likwid-topology.
CPU
Query CPU topology information:
using LIKWID # hide
topo = LIKWID.get_cpu_topology()
topo.threadPool
topo.cacheLevels3-element Vector{LIKWID.CacheLevel}:
LIKWID.CacheLevel(1, :data, 8, 64, 64, 32768, 1, 0)
LIKWID.CacheLevel(2, :unified, 16, 1024, 64, 1048576, 1, 0)
LIKWID.CacheLevel(3, :unified, 11, 40960, 64, 28835840, 20, 0)Get detailed CPU information:
cpuinfo = LIKWID.get_cpu_info()LIKWID.CpuInfo
├ family: 6
├ model: 85
├ stepping: 4
├ vendor: 0
├ part: 0
├ clock: 0
├ turbo: true
├ osname: Intel(R) Xeon(R) Gold 6148F CPU @ 2.40GHz
├ name: Intel Skylake SP processor
├ short_name: skylakeX
├ features: FP ACPI MMX SSE SSE2 HTT TM RDTSCP MONITOR VMX EIST TM2 SSSE FMA SSE4.1 SSE4.2 AES AVX RDRAND HLE AVX2 RTM AVX512 RDSEED SSE3
├ isIntel: true
├ architecture: x86_64
├ supportUncore: true
├ supportClientmem: false
├ featureFlags: 4328456191
├ perf_version: 4
├ perf_num_ctr: 8
├ perf_width_ctr: 48
└ perf_num_fixed_ctr: 3Query information about NUMA nodes:
numa = LIKWID.get_numa_topology()LIKWID.NumaTopology
├ numberOfNodes: 2
└ nodes: ... (2 elements)numa_node = first(numa.nodes)LIKWID.NumaNode
├ id: 0
├ totalMemory: 89.48 GB
├ freeMemory: 83.5 GB
├ numberOfProcessors: 20
├ processors: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19]
├ numberOfDistances: 2
└ distances: [10, 21]Graphical output
Currently, LIKWID.jl doesn't feature a native graphical visualization of the CPU topology. However, it provides a small "wrapper function" around likwid-topology -g which should give you an output like this:
LIKWID.print_cpu_topology()Graphical Topology
********************************************************************************
Socket 0:
+---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ |
| | 0 | | 1 | | 2 | | 3 | | 4 | | 5 | | 6 | | 7 | | 8 | | 9 | | 10 | | 11 | | 12 | | 13 | | 14 | | 15 | | 16 | | 17 | | 18 | | 19 | |
| +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ |
| +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ |
| | 32 kB | | 32 kB | | 32 kB | | 32 kB | | 32 kB | | 32 kB | | 32 kB | | 32 kB | | 32 kB | | 32 kB | | 32 kB | | 32 kB | | 32 kB | | 32 kB | | 32 kB | | 32 kB | | 32 kB | | 32 kB | | 32 kB | | 32 kB | |
| +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ |
| +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ |
| | 1 MB | | 1 MB | | 1 MB | | 1 MB | | 1 MB | | 1 MB | | 1 MB | | 1 MB | | 1 MB | | 1 MB | | 1 MB | | 1 MB | | 1 MB | | 1 MB | | 1 MB | | 1 MB | | 1 MB | | 1 MB | | 1 MB | | 1 MB | |
| +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ |
| +-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+ |
| | 28 MB | |
| +-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+ |
+---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
Socket 1:
+---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ |
| | 20 | | 21 | | 22 | | 23 | | 24 | | 25 | | 26 | | 27 | | 28 | | 29 | | 30 | | 31 | | 32 | | 33 | | 34 | | 35 | | 36 | | 37 | | 38 | | 39 | |
| +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ |
| +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ |
| | 32 kB | | 32 kB | | 32 kB | | 32 kB | | 32 kB | | 32 kB | | 32 kB | | 32 kB | | 32 kB | | 32 kB | | 32 kB | | 32 kB | | 32 kB | | 32 kB | | 32 kB | | 32 kB | | 32 kB | | 32 kB | | 32 kB | | 32 kB | |
| +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ |
| +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ |
| | 1 MB | | 1 MB | | 1 MB | | 1 MB | | 1 MB | | 1 MB | | 1 MB | | 1 MB | | 1 MB | | 1 MB | | 1 MB | | 1 MB | | 1 MB | | 1 MB | | 1 MB | | 1 MB | | 1 MB | | 1 MB | | 1 MB | | 1 MB | |
| +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ +-------+ |
| +-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+ |
| | 28 MB | |
| +-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+ |
+---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
GPU
Query GPU topology information:
topo = LIKWID.get_gpu_topology()LIKWID.GpuTopology
├ numDevices: 1
└ devices: ... (1 elements)gpu = first(topo.devices)LIKWID.GpuDevice
├ devid: 0
├ numaNode: 1
├ name: NVIDIA GeForce RTX 2080 Ti
├ short_name: nvidia_gpu_cc_ge_7
├ mem: 10.76 GB
├ compute_capability_major: 7
├ compute_capability_minor: 5
├ maxThreadsPerBlock: 1024
├ maxThreadsDim: (1024, 1024, 64)
├ maxGridSize: (2147483647, 65535, 65535)
├ sharedMemPerBlock: 49152
├ totalConstantMemory: 65536
├ simdWidth: 32
├ memPitch: 2147483647
├ regsPerBlock: 0
├ clockRatekHz: 1545000
├ textureAlign: 512
├ surfaceAlign: 512
├ l2Size: 5767168
├ memClockRatekHz: 7000000
├ pciBus: 175
├ pciDev: 0
├ pciDom: 0
├ maxBlockRegs: 65536
├ numMultiProcs: 68
├ maxThreadPerMultiProc: 1024
├ memBusWidth: 352
├ unifiedAddrSpace: true
├ ecc: false
├ asyncEngines: 3
├ mapHostMem: true
└ integrated: falseThis page was generated using Literate.jl.