Reported Statistics

The following table shows the statistics the tegrastats utility reports.

Statistic

X

Y

Z

RAM X/Y (lfb NxZ)

Largest Free Block (lfb) is a statistic about the memory allocator. It refers to the largest contiguous block of physical memory that can currently be allocated: at most 4 MB. It can become smaller with memory fragmentation.

The physical allocations in virtual memory can be bigger.

Amount of RAM in use in MB.

Total amount of RAM available for applications.

Z is the size of the largest free block, N the number of free blocks of this size.

CPU [X%,Y%, , ]@Z

or

CPU [X%@Z, Y%@Z,...]

X and Y are rough approximations based on time spent in the system idle process as reported by the Linux kernel in /proc/stat.

Load statistics for each of the CPU cores relative to the current running frequency Z, or 'off' in case a core is currently powered down.

Load statistics for each of the CPU cores relative to the current running frequency Z, or 'off' in case a core is currently powered down.

CPU frequency in megahertz. Goes up or down dynamically depending on the CPU workload.

GR3D_FREQ X%@Y GR3D2_FREQ X%@Y

GR3D is the iGPU engine. GR3D_FREQ is for GPC0, GR3D2_FREQ is for GPC1

Percent of the GR3D that is being used, relative to the current running frequency.

GR3D frequency in megahertz

N/A

X1@Y1C X2@Y2C X3@Y3C...

X1, X2, X3 denote the list of the available sensors

The sensor name

The sensor's temperature in Celsius

N/A

EMC_FREQ @Y

EMC is the external memory controller.

N/A

EMC frequency in megahertz

N/A

NVENC @Y

NVENC1 @Y

NVENC is NVIDIA video encoder.

NVENC1 is the 2nd instance of NVENC. NVENC1 may be reported if it is present and enabled.

Load stats is added. If both frequency and load are enabled, the output looks like NVENC X%@Y. If only frequency is enabled: NVENC_FREQ @Y. If only load: NVENC_LOAD X%.

NVENC frequency in megahertz

N/A

NVDEC @Y

NVDEC1 @Y

NVDEC is NVIDIA video encoder.

NVDEC1 is the 2nd instance of NVDEC. NVDEC1 may be reported if it is present and enabled.

Load stats is added. If both frequency and load are enabled, the output looks like NVDEC X%@Y. If only frequency is enabled: NVDEC_FREQ @Y. If only load: NVDEC_LOAD X%.

NVDEC frequency in megahertz

N/A

VIC @Y

VIC is the video image compositor.

Load stats is added. If both frequency and load are enabled, the output looks like VIC X%@Y. If only frequency is enabled: VIC_FREQ @Y. If only load: VIC_LOAD X%.

VIC frequency in megahertz

N/A