Hyperthreading does not seem to be consistently set across hadoop worker and kafka nodes. All of these nodes have 12 physical cores, and, here is what the OS thinks they have:
analytics1011.eqiad.wmnet: 24 analytics1012.eqiad.wmnet: 12 (kafka) analytics1013.eqiad.wmnet: 24 analytics1014.eqiad.wmnet: 24 analytics1015.eqiad.wmnet: 24 analytics1016.eqiad.wmnet: 24 analytics1017.eqiad.wmnet: 24 analytics1018.eqiad.wmnet: 24 (kafka) analytics1019.eqiad.wmnet: 24 analytics1020.eqiad.wmnet: 24 analytics1021.eqiad.wmnet: 12 (kafka) analytics1022.eqiad.wmnet: 12 (kafka) analytics1028.eqiad.wmnet: 12 analytics1029.eqiad.wmnet: 12 analytics1030.eqiad.wmnet: 12 analytics1031.eqiad.wmnet: 12 analytics1032.eqiad.wmnet: 12 analytics1033.eqiad.wmnet: 12 analytics1034.eqiad.wmnet: 12 analytics1035.eqiad.wmnet: 12 analytics1036.eqiad.wmnet: 12 analytics1037.eqiad.wmnet: 12 analytics1038.eqiad.wmnet: 12 analytics1039.eqiad.wmnet: 12 analytics1040.eqiad.wmnet: 12 analytics1041.eqiad.wmnet: 12