In htop, it shows that the total memory is only 3.5GB, and the used memory has reached 443MB, leaving me with only 3GB of available memory. However, when I check the process usage, there aren’t any processes using a significant amount of memory. So, how is the 443MB being used?
Besides that, on a Jetson Nano 4GB, the free -h command shows a total memory space of 3.9GB. Why does the Orin Nano have significantly less?
Hi,
Some amount of memory is fixed for system usage only and not available. If you need more memory for running the use-case, may consider use the Orin Nano 8GB module.
Is it normal that the total memory of the Jetson Nano is 3.9GB, while the Orin Nano is 3.2GB?
Hi,
Jetson Nano uses Jetpack 4 and Orin Nano uses Jetpack 5/6. It is expected to use more memory in later release. Please check the explanation in
JP 5.0.2 missing ~1GB volatile memory - #18 by Bibek
How can I disable VPR in the R36.3 version? I couldn’t find the misc/tegra194-memcfg-sw-override-l4t.cfg file.
Hi,
The memory layout is fixed and cannot be customized. Please kindly note it.
Hi,
I can see that VPR is disabled by default on Jetpack 6. You can grep McVideoProtectSizeMb in the folder:
Linux_for_Tegra/bootloader
It is set to 0. There is no further room to reduce the system memory.
In that case, what causes this difference, where the Orin Nano 4G only has 3.1GB of available memory?
Jetson Nano 4G, Jetpack 4.5.1 [L4T 32.5.1]:
[ 0.000000] Memory: 3568664K/4159488K available (15294K kernel code, 2942K rwdata, 6644K rodata, 8576K init, 609K bss, 115688K reserved, 475136K cma-reserved)
Orin Nano 4G, Jetpack 5.1.1 [L4T 35.3.1]:
[ 0.000000] Memory: 3115068K/3838016K available (18432K kernel code, 3168K rwdata, 7144K rodata, 3968K init, 1418K bss, 460804K reserved, 262144K cma-reserved)
Hi,
The deviation is due to different kernel versions. And there are some different software stacks:
JP 5.0.2 missing ~1GB volatile memory - #36 by Bibek
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