Memory Usage Query on Jetson Xavier NX 8GB

Robotics & Edge Computing Jetson & Embedded Systems Jetson Xavier NX
1

image
image1397×950 126 KB

Hello, I’m observing unexpected memory behavior on my Jetson Xavier NX (8GB model). According to jtop , only 6.7GB of RAM is available, and approximately 2.5GB appears to be used even with no applications running. This seems inconsistent with the 8GB specification. Is it because I installed the graphical interface and CUDA? Other than that, I can’t think of any other reasons.

3

Hi,

Could you also run the tegrastats tool and share the output with us?

$ sudo tegrastats

Thanks.

5

Hello, here’s my output:

07-29-2025 15:37:55 RAM 2753/6833MB (lfb 16x4MB) SWAP 1090/3416MB (cached 2MB) CPU [2%@1190,1%@1190,3%@1188,1%@1194,off,off] EMC_FREQ 2%@1600 GR3D_FREQ 0%@[408] VIC_FREQ 601 APE 150 AUX@44.5C CPU@45.5C thermal@44.9C AO@45C GPU@45C PMIC@50C VDD_IN 4751mW/4751mW VDD_CPU_GPU_CV 450mW/450mW VDD_SOC 1267mW/1267mW
07-29-2025 15:37:56 RAM 2753/6833MB (lfb 16x4MB) SWAP 1090/3416MB (cached 2MB) CPU [13%@1190,11%@1187,21%@1190,19%@1189,off,off] EMC_FREQ 3%@1600 GR3D_FREQ 0%@[408] VIC_FREQ 601 APE 150 AUX@44C CPU@45.5C thermal@44.9C AO@45C GPU@45.5C PMIC@50C VDD_IN 4915mW/4833mW VDD_CPU_GPU_CV 573mW/511mW VDD_SOC 1267mW/1267mW
07-29-2025 15:37:57 RAM 2753/6833MB (lfb 16x4MB) SWAP 1090/3416MB (cached 2MB) CPU [10%@1189,12%@1190,0%@1191,12%@1190,off,off] EMC_FREQ 2%@1600 GR3D_FREQ 0%@[408] VIC_FREQ 601 APE 150 AUX@44.5C CPU@45.5C thermal@44.9C AO@45C GPU@45.5C PMIC@50C VDD_IN 4751mW/4805mW VDD_CPU_GPU_CV 450mW/491mW VDD_SOC 1267mW/1267mW
07-29-2025 15:37:58 RAM 2753/6833MB (lfb 16x4MB) SWAP 1090/3416MB (cached 2MB) CPU [4%@1195,2%@1189,1%@1185,3%@1189,off,off] EMC_FREQ 2%@1600 GR3D_FREQ 0%@[510] VIC_FREQ 601 APE 150 AUX@44C CPU@45.5C thermal@45.1C AO@45C GPU@45.5C PMIC@50C VDD_IN 4710mW/4781mW VDD_CPU_GPU_CV 409mW/470mW VDD_SOC 1267mW/1267mW
07-29-2025 15:37:59 RAM 2753/6833MB (lfb 16x4MB) SWAP 1090/3416MB (cached 2MB) CPU [4%@1192,3%@1190,0%@1188,3%@1189,off,off] EMC_FREQ 2%@1600 GR3D_FREQ 0%@[510] VIC_FREQ 601 APE 150 AUX@44.5C CPU@46C thermal@45.25C AO@45.5C GPU@45.5C PMIC@50C VDD_IN 4710mW/4767mW VDD_CPU_GPU_CV 409mW/458mW VDD_SOC 1267mW/1267mW
07-29-2025 15:38:00 RAM 2752/6833MB (lfb 16x4MB) SWAP 1090/3416MB (cached 2MB) CPU [5%@1192,6%@1188,0%@1190,5%@1190,off,off] EMC_FREQ 2%@1600 GR3D_FREQ 0%@[510] VIC_FREQ 601 APE 150 AUX@44.5C CPU@45.5C thermal@45.25C AO@45.5C GPU@45.5C PMIC@50C VDD_IN 4792mW/4771mW VDD_CPU_GPU_CV 450mW/456mW VDD_SOC 1267mW/1267mW
07-29-2025 15:38:01 RAM 2752/6833MB (lfb 16x4MB) SWAP 1090/3416MB (cached 2MB) CPU [4%@1189,3%@1191,2%@1192,0%@1190,off,off] EMC_FREQ 2%@1600 GR3D_FREQ 0%@[510] VIC_FREQ 601 APE 150 AUX@44.5C CPU@45.5C thermal@45.4C AO@45.5C GPU@46C PMIC@50C VDD_IN 4710mW/4762mW VDD_CPU_GPU_CV 409mW/450mW VDD_SOC 1267mW/1267mW
07-29-2025 15:38:02 RAM 2752/6833MB (lfb 16x4MB) SWAP 1090/3416MB (cached 2MB) CPU [4%@1188,3%@1192,5%@1190,5%@1189,off,off] EMC_FREQ 2%@1600 GR3D_FREQ 0%@[510] VIC_FREQ 601 APE 150 AUX@44.5C CPU@46C thermal@45.4C AO@45.5C GPU@46C PMIC@50C VDD_IN 4710mW/4756mW VDD_CPU_GPU_CV 409mW/444mW VDD_SOC 1267mW/1267mW
07-29-2025 15:38:03 RAM 2752/6833MB (lfb 16x4MB) SWAP 1090/3416MB (cached 2MB) CPU [1%@1190,3%@1190,2%@1187,5%@1189,off,off] EMC_FREQ 2%@1600 GR3D_FREQ 0%@[510] VIC_FREQ 601 APE 150 AUX@44.5C CPU@45.5C thermal@45.4C AO@45.5C GPU@46C PMIC@50C VDD_IN 4751mW/4755mW VDD_CPU_GPU_CV 409mW/440mW VDD_SOC 1267mW/1267mW
6

Hello, here’s my output:

07-29-2025 15:37:55 RAM 2753/6833MB (lfb 16x4MB) SWAP 1090/3416MB (cached 2MB) CPU [2%@1190,1%@1190,3%@1188,1%@1194,off,off] EMC_FREQ 2%@1600 GR3D_FREQ 0%@[408] VIC_FREQ 601 APE 150 AUX@44.5C CPU@45.5C thermal@44.9C AO@45C GPU@45C PMIC@50C VDD_IN 4751mW/4751mW VDD_CPU_GPU_CV 450mW/450mW VDD_SOC 1267mW/1267mW
07-29-2025 15:37:56 RAM 2753/6833MB (lfb 16x4MB) SWAP 1090/3416MB (cached 2MB) CPU [13%@1190,11%@1187,21%@1190,19%@1189,off,off] EMC_FREQ 3%@1600 GR3D_FREQ 0%@[408] VIC_FREQ 601 APE 150 AUX@44C CPU@45.5C thermal@44.9C AO@45C GPU@45.5C PMIC@50C VDD_IN 4915mW/4833mW VDD_CPU_GPU_CV 573mW/511mW VDD_SOC 1267mW/1267mW
07-29-2025 15:37:57 RAM 2753/6833MB (lfb 16x4MB) SWAP 1090/3416MB (cached 2MB) CPU [10%@1189,12%@1190,0%@1191,12%@1190,off,off] EMC_FREQ 2%@1600 GR3D_FREQ 0%@[408] VIC_FREQ 601 APE 150 AUX@44.5C CPU@45.5C thermal@44.9C AO@45C GPU@45.5C PMIC@50C VDD_IN 4751mW/4805mW VDD_CPU_GPU_CV 450mW/491mW VDD_SOC 1267mW/1267mW
07-29-2025 15:37:58 RAM 2753/6833MB (lfb 16x4MB) SWAP 1090/3416MB (cached 2MB) CPU [4%@1195,2%@1189,1%@1185,3%@1189,off,off] EMC_FREQ 2%@1600 GR3D_FREQ 0%@[510] VIC_FREQ 601 APE 150 AUX@44C CPU@45.5C thermal@45.1C AO@45C GPU@45.5C PMIC@50C VDD_IN 4710mW/4781mW VDD_CPU_GPU_CV 409mW/470mW VDD_SOC 1267mW/1267mW
07-29-2025 15:37:59 RAM 2753/6833MB (lfb 16x4MB) SWAP 1090/3416MB (cached 2MB) CPU [4%@1192,3%@1190,0%@1188,3%@1189,off,off] EMC_FREQ 2%@1600 GR3D_FREQ 0%@[510] VIC_FREQ 601 APE 150 AUX@44.5C CPU@46C thermal@45.25C AO@45.5C GPU@45.5C PMIC@50C VDD_IN 4710mW/4767mW VDD_CPU_GPU_CV 409mW/458mW VDD_SOC 1267mW/1267mW
07-29-2025 15:38:00 RAM 2752/6833MB (lfb 16x4MB) SWAP 1090/3416MB (cached 2MB) CPU [5%@1192,6%@1188,0%@1190,5%@1190,off,off] EMC_FREQ 2%@1600 GR3D_FREQ 0%@[510] VIC_FREQ 601 APE 150 AUX@44.5C CPU@45.5C thermal@45.25C AO@45.5C GPU@45.5C PMIC@50C VDD_IN 4792mW/4771mW VDD_CPU_GPU_CV 450mW/456mW VDD_SOC 1267mW/1267mW
07-29-2025 15:38:01 RAM 2752/6833MB (lfb 16x4MB) SWAP 1090/3416MB (cached 2MB) CPU [4%@1189,3%@1191,2%@1192,0%@1190,off,off] EMC_FREQ 2%@1600 GR3D_FREQ 0%@[510] VIC_FREQ 601 APE 150 AUX@44.5C CPU@45.5C thermal@45.4C AO@45.5C GPU@46C PMIC@50C VDD_IN 4710mW/4762mW VDD_CPU_GPU_CV 409mW/450mW VDD_SOC 1267mW/1267mW
07-29-2025 15:38:02 RAM 2752/6833MB (lfb 16x4MB) SWAP 1090/3416MB (cached 2MB) CPU [4%@1188,3%@1192,5%@1190,5%@1189,off,off] EMC_FREQ 2%@1600 GR3D_FREQ 0%@[510] VIC_FREQ 601 APE 150 AUX@44.5C CPU@46C thermal@45.4C AO@45.5C GPU@46C PMIC@50C VDD_IN 4710mW/4756mW VDD_CPU_GPU_CV 409mW/444mW VDD_SOC 1267mW/1267mW
07-29-2025 15:38:03 RAM 2752/6833MB (lfb 16x4MB) SWAP 1090/3416MB (cached 2MB) CPU [1%@1190,3%@1190,2%@1187,5%@1189,off,off] EMC_FREQ 2%@1600 GR3D_FREQ 0%@[510] VIC_FREQ 601 APE 150 AUX@44.5C CPU@45.5C thermal@45.4C AO@45.5C GPU@46C PMIC@50C VDD_IN 4751mW/4755mW VDD_CPU_GPU_CV 409mW/440mW VDD_SOC 1267mW/1267mW
7

Hi,

We need to check with our internal team.
Will update with more info to you later.

Thanks.

9

Hi,

Sorry for the late update.
Please find the comment below for the information:

Thanks.