1What: /sys/bus/pci/drivers/intel_vpu/.../npu_busy_time_us 2Date: May 2024 3KernelVersion: 6.11 4Contact: dri-devel@lists.freedesktop.org 5Description: Time in microseconds that the device spent executing jobs. The time is 6 counted when and only when there are jobs submitted to firmware. This time 7 can be used to measure the utilization of NPU, either by calculating the 8 difference between two timepoints or monitoring utilization percentage by 9 reading periodically. Recommended read period is 1 second to avoid impact 10 on job submission performance. Read-only. 11 12What: /sys/bus/pci/drivers/intel_vpu/.../npu_memory_utilization 13Date: Jan 2025 14KernelVersion: 6.15 15Contact: dri-devel@lists.freedesktop.org 16Description: Current NPU memory utilization in bytes. Reports the total size of all 17 resident buffer objects allocated for NPU use. Read-only. 18 19What: /sys/bus/pci/drivers/intel_vpu/.../freq/hw_min_freq 20Date: April 2026 21KernelVersion: 7.2 22Contact: dri-devel@lists.freedesktop.org 23Description: Minimum frequency in MHz supported by the NPU hardware. This is a 24 hardware capability and cannot be changed. Read-only. 25 26What: /sys/bus/pci/drivers/intel_vpu/.../freq/hw_efficient_freq 27Date: April 2026 28KernelVersion: 7.2 29Contact: dri-devel@lists.freedesktop.org 30Description: Most efficient operating frequency in MHz for the NPU. This represents 31 the frequency at which the NPU operates most efficiently in terms of power 32 and performance. Read-only. 33 34What: /sys/bus/pci/drivers/intel_vpu/.../freq/hw_max_freq 35Date: April 2026 36KernelVersion: 7.2 37Contact: dri-devel@lists.freedesktop.org 38Description: Maximum frequency in MHz supported by the NPU hardware. This is a 39 hardware capability and cannot be changed. Read-only. 40 41What: /sys/bus/pci/drivers/intel_vpu/.../freq/current_freq 42Date: April 2026 43KernelVersion: 7.2 44Contact: dri-devel@lists.freedesktop.org 45Description: Current operating frequency in MHz of the NPU. The value is valid only 46 when the device is active; returns 0 when idle. The actual frequency may 47 be lower than the requested range due to power or thermal constraints. 48 Read-only. 49 50What: /sys/bus/pci/drivers/intel_vpu/.../freq/set_min_freq 51Date: April 2026 52KernelVersion: 7.2 53Contact: dri-devel@lists.freedesktop.org 54Description: Configured minimum operating frequency in MHz (50XX devices and newer). 55 Values written are clamped to hardware limits (hw_min_freq to hw_max_freq). 56 If set_min_freq exceeds set_max_freq, the driver clamps set_min_freq to 57 set_max_freq when selecting the operating frequency. Read-write. 58 59What: /sys/bus/pci/drivers/intel_vpu/.../freq/set_max_freq 60Date: April 2026 61KernelVersion: 7.2 62Contact: dri-devel@lists.freedesktop.org 63Description: Configured maximum operating frequency in MHz (50XX devices and newer). 64 Values written are clamped to hardware limits (hw_min_freq to hw_max_freq). 65 Read-write. 66