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Add power-measurement-log command (LID 0x25)#3209

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jimmunn wants to merge 1 commit intolinux-nvme:masterfrom
Micron-TPG-OSS:jlmunn/power-meas-log
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Add power-measurement-log command (LID 0x25)#3209
jimmunn wants to merge 1 commit intolinux-nvme:masterfrom
Micron-TPG-OSS:jlmunn/power-meas-log

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@jimmunn
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@jimmunn jimmunn commented Mar 24, 2026

Add power-measurement-log command, including normal, json and binary outputs.

Add Operational Lifetime Energy Consumed (OLEC) and Interval Power Measurement (IPM) to smart log output.

@jimmunn
Add power-measurement-log command (LID 0x25)
3200019 
Add power-measurement-log command, including normal, json and
binary outputs.

Add Operational Lifetime Energy Consumed (OLEC) and Interval
Power Measurement (IPM) to smart log output.

Signed-off-by: Jim Munn <jlmunn@micron.com>
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jimmunn commented Mar 24, 2026

Example of normal output:

sudo .build/nvme power-measurement-log /dev/nvme0
Power Measurement Log
Version                                         : 0
Power Measurement Generation Number             : 2
Power Measurement Attributes                    : 0x0008
Size (bytes)                                    : 1472
Power Measurement Count                         : 334363
Number of Power Histogram Descriptors           : 176
Stop Measurement Time Remaining (minutes)       : 0
Stop Measurement Timestamp                      : 178885476 (Fri Jan  2 20:41:25 1970 EST)
Power Histogram Descriptor Size (bytes)         : 8
Power Histogram Bin Size (mW)                   : 250
Number of Power Histogram Descriptors Supported : 176
Vendor Specific Size (bytes)                    : 0
Power Histogram Descriptor Overflow Count       : 0
Average Interval Power                          : 1.13W
Maximum Interval Power                          : 1.48W
Maximum Interval Power Timestamp                : 393602660 (Mon Jan  5 08:20:02 1970 EST)
Interval Power Percent Error                    : 10

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jimmunn commented Mar 24, 2026

Example of verbose output:

sudo .build/nvme power-measurement-log /dev/nvme0 -v
Power Measurement Log
Version                                         : 0
Power Measurement Generation Number             : 2
Power Measurement Attributes                    : 0x0008
    Power Measurement Enable                    : 0
    Non-Contiguous Power Data Flag              : 0
    Estimated Power Flag                        : 0
    Maximum Interval Power Timestamp Support    : 1
    Power Histogram Descriptor Overflow         : 0
    Power Measurement Type                      : 0 (NVM subsystem total power)
Size (bytes)                                    : 1472
Power Measurement Count                         : 334363
Number of Power Histogram Descriptors           : 176
Stop Measurement Time Remaining (minutes)       : 0
Stop Measurement Timestamp                      : 178885476 (Fri Jan  2 20:41:25 1970 EST)
    Timestamp Origin                            : 0 (The Timestamp field was initialized to 0h by a Controller Level Reset.)
    Sync                                        : 0 (The controller counted time in milliseconds continuously since the Timestamp value was initialized.)
Power Histogram Descriptor Size (bytes)         : 8
Power Histogram Bin Size (mW)                   : 250
Number of Power Histogram Descriptors Supported : 176
Vendor Specific Size (bytes)                    : 0
Power Histogram Descriptor Overflow Count       : 0
Average Interval Power                          : 1.13W
Maximum Interval Power                          : 1.48W
Maximum Interval Power Timestamp                : 393602660 (Mon Jan  5 08:20:02 1970 EST)
    Timestamp Origin                            : 0 (The Timestamp field was initialized to 0h by a Controller Level Reset.)
    Sync                                        : 0 (The controller counted time in milliseconds continuously since the Timestamp value was initialized.)
Interval Power Percent Error                    : 10
Power Histogram Descriptor [0]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 0.00W
Power Histogram Descriptor [1]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 0.25W
Power Histogram Descriptor [2]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 0.50W
Power Histogram Descriptor [3]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 0.75W
Power Histogram Descriptor [4]:
    Power Histogram Bin Count                   : 324729
    Power Histogram Bin Lower Threshold         : 1.00W
Power Histogram Descriptor [5]:
    Power Histogram Bin Count                   : 9634
    Power Histogram Bin Lower Threshold         : 1.25W
Power Histogram Descriptor [6]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 1.50W
Power Histogram Descriptor [7]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 1.75W
Power Histogram Descriptor [8]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 2.00W
Power Histogram Descriptor [9]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 2.25W
Power Histogram Descriptor [10]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 2.50W
Power Histogram Descriptor [11]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 2.75W
Power Histogram Descriptor [12]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 3.00W
Power Histogram Descriptor [13]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 3.25W
Power Histogram Descriptor [14]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 3.50W
Power Histogram Descriptor [15]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 3.75W
Power Histogram Descriptor [16]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 4.00W
Power Histogram Descriptor [17]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 4.25W
Power Histogram Descriptor [18]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 4.50W
Power Histogram Descriptor [19]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 4.75W
Power Histogram Descriptor [20]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 5.00W
Power Histogram Descriptor [21]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 5.25W
Power Histogram Descriptor [22]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 5.50W
Power Histogram Descriptor [23]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 5.75W
Power Histogram Descriptor [24]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 6.00W
Power Histogram Descriptor [25]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 6.25W
Power Histogram Descriptor [26]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 6.50W
Power Histogram Descriptor [27]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 6.75W
Power Histogram Descriptor [28]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 7.00W
Power Histogram Descriptor [29]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 7.25W
Power Histogram Descriptor [30]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 7.50W
Power Histogram Descriptor [31]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 7.75W
Power Histogram Descriptor [32]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 8.00W
Power Histogram Descriptor [33]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 8.25W
Power Histogram Descriptor [34]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 8.50W
Power Histogram Descriptor [35]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 8.75W
Power Histogram Descriptor [36]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 9.00W
Power Histogram Descriptor [37]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 9.25W
Power Histogram Descriptor [38]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 9.50W
Power Histogram Descriptor [39]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 9.75W
Power Histogram Descriptor [40]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 10.00W
Power Histogram Descriptor [41]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 10.25W
Power Histogram Descriptor [42]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 10.50W
Power Histogram Descriptor [43]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 10.75W
Power Histogram Descriptor [44]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 11.00W
Power Histogram Descriptor [45]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 11.25W
Power Histogram Descriptor [46]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 11.50W
Power Histogram Descriptor [47]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 11.75W
Power Histogram Descriptor [48]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 12.00W
Power Histogram Descriptor [49]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 12.25W
Power Histogram Descriptor [50]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 12.50W
Power Histogram Descriptor [51]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 12.75W
Power Histogram Descriptor [52]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 13.00W
Power Histogram Descriptor [53]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 13.25W
Power Histogram Descriptor [54]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 13.50W
Power Histogram Descriptor [55]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 13.75W
Power Histogram Descriptor [56]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 14.00W
Power Histogram Descriptor [57]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 14.25W
Power Histogram Descriptor [58]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 14.50W
Power Histogram Descriptor [59]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 14.75W
Power Histogram Descriptor [60]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 15.00W
Power Histogram Descriptor [61]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 15.25W
Power Histogram Descriptor [62]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 15.50W
Power Histogram Descriptor [63]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 15.75W
Power Histogram Descriptor [64]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 16.00W
Power Histogram Descriptor [65]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 16.25W
Power Histogram Descriptor [66]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 16.50W
Power Histogram Descriptor [67]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 16.75W
Power Histogram Descriptor [68]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 17.00W
Power Histogram Descriptor [69]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 17.25W
Power Histogram Descriptor [70]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 17.50W
Power Histogram Descriptor [71]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 17.75W
Power Histogram Descriptor [72]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 18.00W
Power Histogram Descriptor [73]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 18.25W
Power Histogram Descriptor [74]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 18.50W
Power Histogram Descriptor [75]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 18.75W
Power Histogram Descriptor [76]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 19.00W
Power Histogram Descriptor [77]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 19.25W
Power Histogram Descriptor [78]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 19.50W
Power Histogram Descriptor [79]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 19.75W
Power Histogram Descriptor [80]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 20.00W
Power Histogram Descriptor [81]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 20.25W
Power Histogram Descriptor [82]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 20.50W
Power Histogram Descriptor [83]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 20.75W
Power Histogram Descriptor [84]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 21.00W
Power Histogram Descriptor [85]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 21.25W
Power Histogram Descriptor [86]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 21.50W
Power Histogram Descriptor [87]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 21.75W
Power Histogram Descriptor [88]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 22.00W
Power Histogram Descriptor [89]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 22.25W
Power Histogram Descriptor [90]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 22.50W
Power Histogram Descriptor [91]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 22.75W
Power Histogram Descriptor [92]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 23.00W
Power Histogram Descriptor [93]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 23.25W
Power Histogram Descriptor [94]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 23.50W
Power Histogram Descriptor [95]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 23.75W
Power Histogram Descriptor [96]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 24.00W
Power Histogram Descriptor [97]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 24.25W
Power Histogram Descriptor [98]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 24.50W
Power Histogram Descriptor [99]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 24.75W
Power Histogram Descriptor [100]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 25.00W
Power Histogram Descriptor [101]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 25.25W
Power Histogram Descriptor [102]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 25.50W
Power Histogram Descriptor [103]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 25.75W
Power Histogram Descriptor [104]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 26.00W
Power Histogram Descriptor [105]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 26.25W
Power Histogram Descriptor [106]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 26.50W
Power Histogram Descriptor [107]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 26.75W
Power Histogram Descriptor [108]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 27.00W
Power Histogram Descriptor [109]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 27.25W
Power Histogram Descriptor [110]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 27.50W
Power Histogram Descriptor [111]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 27.75W
Power Histogram Descriptor [112]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 28.00W
Power Histogram Descriptor [113]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 28.25W
Power Histogram Descriptor [114]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 28.50W
Power Histogram Descriptor [115]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 28.75W
Power Histogram Descriptor [116]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 29.00W
Power Histogram Descriptor [117]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 29.25W
Power Histogram Descriptor [118]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 29.50W
Power Histogram Descriptor [119]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 29.75W
Power Histogram Descriptor [120]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 30.00W
Power Histogram Descriptor [121]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 30.25W
Power Histogram Descriptor [122]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 30.50W
Power Histogram Descriptor [123]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 30.75W
Power Histogram Descriptor [124]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 31.00W
Power Histogram Descriptor [125]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 31.25W
Power Histogram Descriptor [126]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 31.50W
Power Histogram Descriptor [127]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 31.75W
Power Histogram Descriptor [128]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 32.00W
Power Histogram Descriptor [129]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 32.25W
Power Histogram Descriptor [130]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 32.50W
Power Histogram Descriptor [131]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 32.75W
Power Histogram Descriptor [132]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 33.00W
Power Histogram Descriptor [133]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 33.25W
Power Histogram Descriptor [134]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 33.50W
Power Histogram Descriptor [135]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 33.75W
Power Histogram Descriptor [136]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 34.00W
Power Histogram Descriptor [137]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 34.25W
Power Histogram Descriptor [138]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 34.50W
Power Histogram Descriptor [139]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 34.75W
Power Histogram Descriptor [140]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 35.00W
Power Histogram Descriptor [141]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 35.25W
Power Histogram Descriptor [142]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 35.50W
Power Histogram Descriptor [143]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 35.75W
Power Histogram Descriptor [144]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 36.00W
Power Histogram Descriptor [145]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 36.25W
Power Histogram Descriptor [146]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 36.50W
Power Histogram Descriptor [147]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 36.75W
Power Histogram Descriptor [148]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 37.00W
Power Histogram Descriptor [149]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 37.25W
Power Histogram Descriptor [150]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 37.50W
Power Histogram Descriptor [151]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 37.75W
Power Histogram Descriptor [152]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 38.00W
Power Histogram Descriptor [153]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 38.25W
Power Histogram Descriptor [154]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 38.50W
Power Histogram Descriptor [155]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 38.75W
Power Histogram Descriptor [156]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 39.00W
Power Histogram Descriptor [157]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 39.25W
Power Histogram Descriptor [158]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 39.50W
Power Histogram Descriptor [159]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 39.75W
Power Histogram Descriptor [160]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 40.00W
Power Histogram Descriptor [161]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 40.25W
Power Histogram Descriptor [162]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 40.50W
Power Histogram Descriptor [163]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 40.75W
Power Histogram Descriptor [164]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 41.00W
Power Histogram Descriptor [165]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 41.25W
Power Histogram Descriptor [166]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 41.50W
Power Histogram Descriptor [167]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 41.75W
Power Histogram Descriptor [168]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 42.00W
Power Histogram Descriptor [169]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 42.25W
Power Histogram Descriptor [170]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 42.50W
Power Histogram Descriptor [171]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 42.75W
Power Histogram Descriptor [172]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 43.00W
Power Histogram Descriptor [173]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 43.25W
Power Histogram Descriptor [174]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 43.50W
Power Histogram Descriptor [175]:
    Power Histogram Bin Count                   : 0
    Power Histogram Bin Lower Threshold         : 43.75W

@jimmunn
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jimmunn commented Mar 24, 2026

Example of json output:

sudo .build/nvme power-measurement-log /dev/nvme0 -o json
{
  "ver":0,
  "pmgn":2,
  "pma":8,
  "pme":0,
  "ncpdf":0,
  "epf":0,
  "mipwrts":1,
  "phdo":0,
  "pmt":0,
  "pmt_str":"NVM subsystem total power",
  "sze":1472,
  "pmc":334363,
  "nphd":176,
  "smtr":0,
  "smts":{
    "timestamp":178885476,
    "timestamp string":"Fri Jan  2 20:41:25 1970 EST",
    "timestamp origin":"The Timestamp field was initialized to 0h by a Controller Level Reset.",
    "synch":"The controller counted time in milliseconds continuously since the Timestamp value was initialized."
  },
  "phds":8,
  "phbs":250,
  "nphds":176,
  "vss":0,
  "phdoc":0,
  "aipwr":131185,
  "mipwr":131220,
  "mipwrt":{
    "timestamp":393602660,
    "timestamp string":"Mon Jan  5 08:20:02 1970 EST",
    "timestamp origin":"The Timestamp field was initialized to 0h by a Controller Level Reset.",
    "synch":"The controller counted time in milliseconds continuously since the Timestamp value was initialized."
  },
  "ipwrpe":10,
  "descs":[
    {
      "phbc":0,
      "phblt":131072
    },
    {
      "phbc":0,
      "phblt":131097
    },
    {
      "phbc":0,
      "phblt":131122
    },
    {
      "phbc":0,
      "phblt":131147
    },
    {
      "phbc":324729,
      "phblt":131172
    },
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}

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bbusacker commented Mar 26, 2026

This PR address Issue #3084

igaw
igaw reviewed Mar 30, 2026
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libnvme/src/nvme/types.h
* has never occurred or this field is not implemented.
* @thm_temp2_total_time: Total Time For Thermal Management Temperature 2
* @rsvd232: Reserved
* @op_lifetime_energy_consumed: Operational Lifetime Energy Consumed: Contains
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@igaw igaw Mar 30, 2026

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Using this long name here makes sense. This makes it consistent. Though I wonder if we should update (afterwards) to the short names, as we have done in cmds.h. Maybe not, this is one of these huge tasks for someone else :)

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igaw commented Mar 30, 2026

I've added the 'nvme' prefix to the commit message. I could not push it back to this branch thus I went ahead and merged it directly.

Thanks!

@igaw igaw closed this Mar 30, 2026
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@jimmunn @bbusacker @igaw