GPU load meaning in tegrastats utility

Autonomous Machines Jetson & Embedded Systems Jetson TX2
#1

Hello,

I have checked nvidia tegrastats utility document here.

It says GR3D_FREQ is the GR3D engine load/utilization in percentage at current frequency.

Does TX2 iGPU have no GR2D or other GPU engine? so that I can check overall GPU usage just by checking the GR3D utilization rate.

If that so, where is that number came from? tegrastats utility source code is not publicly opened and I found some articles this and this.

I seems that tegrastats utility just reads some sysfs nodes. then does anyone know how the number is calculated in sysfs node? (things like busy_cycle/idle_cycle)

Should I ask this question to L4T kernel developers?

Many thanks

#3

hello tjals374,

TX2 series use Pascal GPU architecture.
the tegrastats utility report the usage percentage (i.e. loading) per the GPU frequency in MHz.
you may also check sysnode, i.e. /sys/bus/platform/devices/17000000.gp10b/devfreq/17000000.gp10b/
thanks

1 Like
#4

Hi JerryChang,

Does usage percentage(loading) means busy cycle/total cycle?

Thank you

#5

hello tjals374,

yes, please note that the total cycle based-on the current GPU frequency.

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#6

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