Nano Performing Too Slow After Reflashing: 2 JetPack versions on one Jetson Nano 4GB?

Autonomous Machines Jetson & Embedded Systems Jetson Nano
1

Hello dear all,

I have a Jetson Nano 4GB and 64gb sd card
For a project case I wanted to reflash nano withJetPack 4.6 and , after this my nano started working too slow and I didn’t downloaded anything yet that it’s even not able to handle 2 or more open Chromium tabs, it is on MAXN mode and I always run jetson_clocks on the start. Still doesn’t helps.

When I tried to check my Jetpack version I came across the result below and I thought could seeing 2 packages could be causing this performance leakage?

sudo apt-cache show nvidia-jetpack
[sudo] password for sena:
Package: nvidia-jetpack
Version: 4.6-b199
Architecture: arm64
Maintainer: NVIDIA Corporation
Installed-Size: 194
Depends: nvidia-cuda (= 4.6-b199), nvidia-opencv (= 4.6-b199), nvidia-cudnn8 (= 4.6-b199), nvidia-tensorrt (= 4.6-b199), nvidia-visionworks (= 4.6-b199), nvidia-container (= 4.6-b199), nvidia-vpi (= 4.6-b199), nvidia-l4t-jetson-multimedia-api (>> 32.6-0), nvidia-l4t-jetson-multimedia-api (<< 32.7-0)
Homepage: Autonomous Machines | NVIDIA Developer
Priority: standard
Section: metapackages
Filename: pool/main/n/nvidia-jetpack/nvidia-jetpack_4.6-b199_arm64.deb
Size: 29368
SHA256: 69df11e22e2c8406fe281fe6fc27c7d40a13ed668e508a592a6785d40ea71669
SHA1: 5c678b8762acc54f85b4334f92d9bb084858907a
MD5sum: 1b96cd72f2a434e887f98912061d8cfb
Description: NVIDIA Jetpack Meta Package
Description-md5: ad1462289bdbc54909ae109d1d32c0a8

Package: nvidia-jetpack
Version: 4.6-b197
Architecture: arm64
Maintainer: NVIDIA Corporation
Installed-Size: 194
Depends: nvidia-cuda (= 4.6-b197), nvidia-opencv (= 4.6-b197), nvidia-cudnn8 (= 4.6-b197), nvidia-tensorrt (= 4.6-b197), nvidia-visionworks (= 4.6-b197), nvidia-container (= 4.6-b197), nvidia-vpi (= 4.6-b197), nvidia-l4t-jetson-multimedia-api (>> 32.6-0), nvidia-l4t-jetson-multimedia-api (<< 32.7-0)
Homepage: Autonomous Machines | NVIDIA Developer
Priority: standard
Section: metapackages
Filename: pool/main/n/nvidia-jetpack/nvidia-jetpack_4.6-b197_arm64.deb
Size: 29356
SHA256: 104cd0c1efefe5865753ec9b0b148a534ffdcc9bae525637c7532b309ed44aa0
SHA1: 8cca8b9ebb21feafbbd20c2984bd9b329a202624
MD5sum: 463d4303429f163b97207827965e8fe0
Description: NVIDIA Jetpack Meta Package
Description-md5: ad1462289bdbc54909ae109d1d32c0a8

3

hello senanursahin,

what dose this meant, did all CPU resources were occupied?
could you please check $ top and share the results.

may I know how you re-flash the Nano platform. are you using SDKManager or you’re flashing that through flash.sh manually?
btw, you may check $ cat /etc/nv_tegra_release | head for the release version,
thanks

4

hello @JerryChang ,

I don’t know if all resources are occupied:( Disk might be a problem too maybe? 43.6GB/62.9GB available it says

top result:

top - 08:15:10 up 17 min, 1 user, load average: 3,05, 1,89, 1,85
Tasks: 297 total, 1 running, 296 sleeping, 0 stopped, 0 zombie
%Cpu(s): 6,1 us, 3,2 sy, 0,1 ni, 18,0 id, 72,0 wa, 0,4 hi, 0,2 si, 0,0 st
KiB Mem : 4051104 total, 587008 free, 1863400 used, 1600696 buff/cache
KiB Swap: 2025536 total, 2025536 free, 0 used. 1946084 avail Mem

cat /etc/nv_tegra_release | head result:

R32 (release), REVISION: 6.1, GCID: 27863751, BOARD: t210ref, EABI: aarch64, DATE: Mon Jul 26 19:20:30 UTC 2021

Thanks in advance,
Sena

5

hello senanursahin,

it shows light CPU usage. 6.1% occupied by user-space.
what exactly the “slow” you’ve experience, is there any performance evaluation results for reference?
thanks

6

I’m sorry that I’m not able to give you any sensable example but Nano takes more time than it does before to start.

Screen doesn’t reacts when I type something after a while I see what I type. When Chromium is open I get frozen screen. I mean I haven’t even been able to launch my project when Nano is behaving like this.

If you could suggest me commands to search more Nano performance on device, I’d be more than happy to share the results.

Thanks

7

hello senanursahin,

how you flash the Nano platform, are you using SDKManager, or you’re downloading SD Card Image?

what’s the kernel messages reported, is there any failure reported from low-level side? i.e. $ dmesg > klog.txt
could you please execute tegrastats utility, please gather the statistics for reference, i.e. $ sudo ./tegrastats --interval 5000, and you may repo the issue, for example, when Chromium is open I get frozen screen, then sharing the results for reference,
thanks

8

hello @JerryChang

I flash with SD card image.
Both functions you’ve asked returns me empty inputs

And could this zram partition be causing my problem?

disk
disk794×722 65.3 KB

9

klog.txt (67.6 KB)
@JerryChang I’m so sorry here is the klog.txt

10

hello senanursahin,

I see nothing special in the kernel logs, if it’s possible, could you please share the complete steps you’ve done for reference.
for example, what’s the SDcard partition you’ve formatted, how can we reproduce the issue locally.

12

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