Some files in the /sys directory show unexpected CPU speed values when using Ampere Altra or Ampere Altra Max CPUs

Solution In Progress - Updated -

Issue

Some files in the /sys directory show unexpected CPU speed values when using Ampere Altra or Ampere Altra Max CPUs

           User Min       User Max      Performance
-------- -------------- -------------- --------------
expected  1000 MHz       3000 MHz       3000 MHz
cpu 88     950 (32.51s)  3000 (10.85s)  1000 (10.83s) 
cpu 21    1000 (32.51s)  3000 (10.85s)  3000 (10.83s) 
cpu 116   1000 (32.51s)  3000 (10.85s)  3000 (10.83s) 
cpu 78    1000 (32.51s)   840 (10.85s)  3000 (10.83s) 
cpu 11    1000 (32.51s)   840 (10.85s)  3000 (10.83s) 
cpu 106   1000 (32.51s)   840 (10.85s)  3000 (10.83s) 
cpu 9     1000 (32.51s)   840 (10.85s)  3000 (10.83s) 
cpu 68    1000 (32.51s)   840 (10.85s)  3000 (10.83s) 
cpu 96    1000 (32.51s)  3000 (10.85s)  3000 (10.83s) 
cpu 124   1000 (32.51s)   840 (10.85s)  3000 (10.83s) 
cpu 58    1000 (32.51s)   840 (10.85s)  3000 (10.83s) 
cpu 86     810 (32.51s)   840 (10.85s)  3000 (10.83s) 
cpu 114   1000 (32.54s)   840 (10.85s)  3000 (10.83s) 
cpu 48    1000 (32.51s)  3000 (10.88s)  3000 (10.83s) 
cpu 76    1000 (32.51s)  3000 (10.85s)  3000 (10.83s) 
cpu 104   1000 (32.51s)   840 (10.85s)  3000 (10.83s) 
cpu 7     1000 (32.51s)   840 (10.85s)  3000 (10.83s) 
cpu 38    1000 (32.51s)   840 (10.85s)  3000 (10.83s) 
cpu 66    1000 (32.51s)   840 (10.85s)  3000 (10.83s) 
cpu 94     500 (32.51s)  3000 (10.85s)  3000 (10.83s) 
cpu 28    1000 (32.51s)   840 (10.85s)  3000 (10.83s) 
cpu 122   1000 (32.51s)   840 (10.85s)  3000 (10.83s) 
cpu 56    1000 (32.51s)   840 (10.85s)  3000 (10.83s) 
cpu 84    1000 (32.51s)   840 (10.85s)  3000 (10.83s) 
cpu 18    1000 (32.51s)   840 (10.85s)  3000 (10.83s) 
cpu 112   1000 (32.51s)   840 (10.85s)   800 (10.83s) 
cpu 46    1000 (32.51s)  3000 (10.85s)   810 (10.83s) 
cpu 74    1000 (32.51s)   840 (10.85s)  3000 (10.83s) 
cpu 102   1000 (32.51s)   840 (10.85s)  3000 (10.83s) 
cpu 5     1000 (32.57s)   840 (10.86s)  3000 (10.83s) 
cpu 36    1000 (32.51s)   840 (10.85s)   810 (10.83s) 
cpu 64    1000 (32.51s)   840 (10.85s)   810 (10.83s) 
cpu 92    1000 (32.51s)   840 (10.85s)   810 (10.83s) 
cpu 26    1000 (32.51s)   840 (10.85s)  3000 (10.83s) 
cpu 120   1000 (32.51s)   840 (10.85s)   810 (10.83s) 
cpu 54    1000 (32.51s)   840 (10.85s)   810 (10.83s) 
cpu 82    1000 (32.51s)   840 (10.85s)   810 (10.83s) 
cpu 16    1000 (32.51s)   840 (10.85s)   810 (10.83s) 
cpu 110   1000 (32.51s)   840 (10.85s)  3000 (10.83s) 
cpu 44    1000 (32.51s)  3000 (10.85s)   810 (10.83s) 
cpu 72    1000 (32.51s)   840 (10.85s)  3000 (10.83s) 
cpu 100   1000 (32.51s)  3000 (10.85s)   840 (10.83s) 
cpu 3      500 (32.61s)   840 (10.85s)   840 (10.86s) 
cpu 34    1000 (32.51s)  3000 (10.85s)   840 (10.83s) 
cpu 62    1000 (32.51s)   840 (10.85s)   840 (10.83s) 
cpu 90    1000 (32.51s)  3000 (10.85s)   840 (10.83s) 
cpu 24    1000 (32.51s)  3000 (10.85s)  3000 (10.83s) 
cpu 119   1000 (32.51s)   840 (10.85s)   840 (10.83s) 
cpu 52    1000 (32.51s)   840 (10.85s)  3000 (10.83s) 
cpu 80    1000 (32.50s)  3000 (10.85s)   840 (10.83s) 
cpu 14    1000 (32.51s)  3000 (10.85s)  3000 (10.83s) 
cpu 109    810 (32.51s)   840 (10.85s)  3000 (10.83s) 
cpu 42    1000 (32.51s)  3000 (10.85s)  3000 (10.83s) 
cpu 70    1000 (32.51s)  3000 (10.85s)  3000 (10.83s) 
cpu 1     1000 (32.51s)  3000 (10.85s)  3000 (10.83s) 
cpu 99    1000 (32.51s)  3000 (10.85s)   840 (10.83s) 
cpu 32    1000 (32.51s)   840 (10.85s)   840 (10.83s) 
cpu 127   1000 (32.52s)  3000 (10.85s)  3000 (10.83s) 
cpu 60    1000 (32.51s)  3000 (10.85s)  3000 (10.83s) 
cpu 89    1000 (32.51s)  3000 (10.85s)  3000 (10.83s) 
cpu 22    1000 (32.51s)  3000 (10.85s)  3000 (10.83s) 
cpu 117   1000 (32.51s)  3000 (10.85s)  3000 (10.83s) 
cpu 50    1000 (32.51s)   840 (10.85s)  3000 (10.83s) 
cpu 79    1000 (32.51s)  3000 (10.85s)  3000 (10.83s) 
cpu 12    1000 (32.51s)  3000 (10.85s)  3000 (10.83s) 
cpu 107   1000 (32.51s)  3000 (10.85s)  3000 (10.83s) 
cpu 40    1000 (32.51s)   840 (10.85s)   840 (10.83s) 
cpu 69    1000 (32.51s)  3000 (10.85s)  3000 (10.83s) 
cpu 97    1000 (32.51s)  3000 (10.85s)  3000 (10.83s) 
cpu 30    1000 (32.51s)   840 (10.85s)  3000 (10.83s) 
cpu 125   1000 (32.51s)  3000 (10.85s)  3000 (10.83s) 
cpu 59    1000 (32.51s)  3000 (10.85s)  3000 (10.83s) 
cpu 87    1000 (32.50s)  3000 (10.85s)  3000 (10.83s) 
cpu 20    1000 (32.51s)  3000 (10.85s)  3000 (10.83s) 
cpu 115   1000 (32.54s)  3000 (10.85s)  3000 (10.83s) 
cpu 49    1000 (32.51s)  3000 (10.85s)  3000 (10.83s) 
cpu 77    1000 (32.51s)  3000 (10.85s)  3000 (10.83s) 
cpu 10    1000 (32.51s)  3000 (10.85s)  3000 (10.83s) 
cpu 105   1000 (32.50s)  3000 (10.85s)   840 (10.83s) 
cpu 8     1000 (32.51s)  3000 (10.85s)  3000 (10.83s) 
cpu 39    1000 (32.51s)  3000 (10.85s)  3000 (10.83s) 
cpu 67    1000 (32.51s)  3000 (10.85s)  3000 (10.83s) 
cpu 95    1000 (32.51s)  3000 (10.85s)  3000 (10.83s) 
cpu 29    1000 (32.51s)  3000 (10.85s)  3000 (10.83s) 
cpu 123   1000 (32.53s)  3000 (10.85s)  3000 (10.83s) 
cpu 57    1000 (32.51s)  3000 (10.85s)  3000 (10.83s) 
cpu 85    1000 (32.51s)   840 (10.85s)  3000 (10.83s) 
cpu 19    1000 (32.51s)  3000 (10.85s)  3000 (10.83s) 
cpu 113   1000 (32.51s)  3000 (10.85s)  3000 (10.83s) 
cpu 47    1000 (32.51s)  3000 (10.85s)  3000 (10.83s) 
cpu 75    1000 (32.51s)  3000 (10.85s)  3000 (10.83s) 
cpu 103   1000 (32.51s)  3000 (10.85s)  3000 (10.83s) 
cpu 6     1000 (32.51s)  3000 (10.85s)  3000 (10.83s) 
cpu 37    1000 (32.51s)  3000 (10.85s)  3000 (10.83s) 
cpu 65    1000 (32.51s)  3000 (10.85s)  3000 (10.83s) 
cpu 93    1000 (32.51s)  3000 (12.64s)  3000 (10.83s) 
cpu 27    1000 (32.51s)  3000 (10.85s)  3000 (10.83s) 
cpu 121   1000 (32.51s)  3000 (10.85s)  3000 (10.83s) 
cpu 55    1000 (32.51s)  3000 (10.85s)  3000 (10.83s) 
cpu 83    1000 (32.51s)  3000 (10.85s)  3000 (10.83s) 
cpu 17    1000 (32.51s)  3000 (10.85s)  3000 (10.83s) 
cpu 111   1000 (32.51s)  3000 (10.85s)  3000 (10.83s) 
cpu 45    1000 (32.51s)  3000 (10.85s)  3000 (10.83s) 
cpu 73    1000 (32.51s)  3000 (10.85s)  3000 (10.83s) 
cpu 101   1000 (32.51s)  3000 (10.85s)  3000 (10.83s) 
cpu 4     1000 (32.55s)  3000 (10.85s)  3000 (10.83s) 
cpu 35    1000 (32.51s)  3000 (10.85s)  3000 (10.83s) 
cpu 63    1000 (32.51s)  3000 (10.85s)  3000 (10.84s) 
cpu 91    1000 (36.80s)  3000 (10.85s)   840 (10.83s) 
cpu 25    1000 (32.51s)  3000 (10.85s)  3000 (10.83s) 
cpu 53    1000 (32.51s)  3000 (10.85s)  3000 (10.83s) 
cpu 81    1000 (32.50s)  3000 (10.85s)  3000 (10.83s) 
cpu 15    1000 (32.51s)  3000 (10.85s)  3000 (10.83s) 
cpu 43    1000 (32.50s)  3000 (10.85s)  3000 (10.83s) 
cpu 71    1000 (32.51s)  3000 (12.64s)  3000 (10.83s) 
cpu 2     1000 (32.63s)  3000 (10.85s)  3000 (10.85s) 
cpu 33    1000 (32.51s)  3000 (10.85s)  3000 (10.83s) 
cpu 61    1000 (32.51s)  3000 (10.85s)  3000 (10.83s) 
cpu 23    1000 (32.50s)  3000 (10.85s)  3000 (10.83s) 
cpu 118   1000 (32.51s)  3000 (10.85s)  3000 (10.83s) 
cpu 51    1000 (32.51s)  3000 (10.85s)  3000 (10.83s) 
cpu 13    1000 (32.51s)  3000 (10.85s)  3000 (10.83s) 
cpu 108   1000 (32.51s)  3000 (10.85s)  3000 (10.83s) 
cpu 41    1000 (32.51s)   840 (10.85s)   840 (10.83s) 
cpu 0     1000 (32.51s)  3000 (10.85s)  3000 (10.83s) 
cpu 98    1000 (32.51s)   840 (10.85s)  3000 (10.83s) 
cpu 31    1000 (32.53s)   840 (10.85s)  3000 (10.84s) 
cpu 126   1000 (32.55s)  3000 (10.85s)  3000 (10.83s)

Environment

  • Red Hat Enterprise Linux for ARM 64 8.x or 9.x
  • Hewlett Packard Enterprise HPE ProLiant RL300 Gen11
  • Ampere Altra or Ampere Altra Max CPUs

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