NVIDIA Tegra Linux Driver Package Development Guide 28.2 Release |
Statistic | X | Y | Z |
RAM X/Y (lfb NxZ) • Largest Free Block (lfb) is a statistic about the memory allocator. • Refers to the largest contiguous block of physical memory that can currently be allocated; at most 4 MB. 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 • T30 has up to four CPU cores in the G-Cluster. • One CPU core in the LP-Cluster. | 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. A rough approximation based on time spent in system idle process as reported by the Linux kernel in /proc/stat file. | 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. A rough approximation based on time spent in system idle process as reported by the Linux kernel in /proc/stat file. | CPU frequency in MHz. Dynamically goes up or down depending on the CPU workload. |
APE Audio Processing Engine Y APE subsystem consists of ADSP (Cortex®-A9 CPU), mailboxes, AHUB, ADMA etc. | N/A | ADSP load activity monitor and reports ADSP frequency in MHz | N/A |
edp limit X TX1: To see EDP limit use --systrace | Limit of the CPU maximum frequency. | N/A | N/A |
emc X%@Y EMC is the external memory controller, through which all sysmem/carve-out/GART memory accesses go. | Percent of the EMC memory bandwidth being used; relative to the current running frequency. | EMC frequency in MHz | N/A |
GR3D X%@Y GR3D is the GPU engine. | Percent of the GR3D being used; relative to the current running frequency. | GR3D frequency in MHz | N/A |
MSENC Y MSENC is the video hardware encoding engine. | N/A | MSENC frequency in MHz | N/A |
NVDEC Y NVDEC is the video hardware decoding engine. Shown only when hardware decoder/encoder engine is used. | N/A | NVDEC frequency in MHz | N/A |
MTS fg X bg Y | Time spent in foreground tasks. | Time spent in background tasks | N/A |
[temp name]@XC | Temperature in Celsius. | N/A | N/A |
[VDD_name] X/Y | Current rail voltage. | Average value | N/A |
Option | Description |
<delay> | The delay between outputs in milliseconds (ms). For example, a value of 500 causes output to display twice per second. If no delay value is specified, the default delay is 1000 ms. A <delay> value, if specified, must be the first value after the command, before any other options. |
--start | Run TegraStats as a daemon, in the background. |
--stop | Stop running any running instances of tegrastats. |
--logfile <out_file> | Write the output of TegraStats to <out_file>. |
-once | Print data only once and then exit. |
-throttle | Track the throttle count. |
<thermal_zone> | Print temperature in specified <thermal_zone>. The value for <thermal_zone> must match one of the strings in "/sys/devices/virtual/thermal/thermal_zone*/type. |