libnvme(9) API Manual libnvme(9)

# [NAME](#NAME)

struct nvme\_power\_histogram\_desc - Power Histogram Descriptor

# [SYNOPSIS](#SYNOPSIS)

struct nvme\_power\_histogram\_desc {  
**\_\_le32 phbc;**  
**\_\_le32 phblt;**  
};

# [Members](#Members)

[phbc](#phbc)

Power Histogram Bin Count. Does not wrap after FFFFFFFFh. Cleared to 0h if PMC is 0h.

[phblt](#phblt)

Power Histogram Bin Lower Threshold. Bits 17:16 are PWRS (see *enum nvme\_psd\_ps*), bits 15:0 are PWRV.

struct nvme\_power\_histogram\_desc October 2026

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Document: nvme_power_histogram_desc-libnvme3(2) from nvme-cli 3.2-r0 (Chainguard OS)
Source: https://github.com/linux-nvme/nvme-cli