nviennot / core-to-core-latency

Measures the latency between CPU cores
MIT License
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[result] Intel(R) Core(TM) i7-7700HQ CPU @ 2.80GHz #22

Open homersimpsons opened 2 years ago

homersimpsons commented 2 years ago

Here is the output:

$ core-to-core-latency 5000 --csv > core-to-core-latency.csv
Num cores: 8
Using RDTSC to measure time: true
Num round trips per samples: 5000
Num samples: 300
Showing latency=round-trip-time/2 in nanoseconds:

       0       1       2       3       4       5       6       7   
  0
  1   30±1 
  2   28±0    24±0 
  3   26±0    25±0    26±0 
  4    9±0    26±0    27±0    26±0 
  5   26±0     9±0    25±0    25±0    25±0 
  6   28±0    26±0     9±0    26±0    26±0    27±0 
  7   27±0    25±0    24±0     9±0    25±0    27±0    26±0 

Min  latency: 8.6ns ±0.1 cores: (7,3)
Max  latency: 30.1ns ±0.9 cores: (1,0)
Mean latency: 23.6ns