High CPU Utilization on nEDBG when serial in use, on MacOS.

Log in or register to post comments
Go To Last Post
5 posts / 0 new
Author
Message
westfw
westfw's picture
Level: Raving Lunatic
Joined: Wed. Jun 19, 2002
Posts: 4700 View posts
Location: SF Bay area
#1
Posted by westfw: Fri. Oct 2, 2020 - 05:23 AM
  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

Whee...   Another distraction.

 

When I have an nEDBG eval board (Curiosity Nano) connected to my Mac (10.13.6), and have it's virtual serial port open (Arduino Serial Monitor or minicom),, the "kernel_task" process kicks up to 80% CPU utilization !

 

This happens with Curiosity ATtiny3217 nano, Curiosity ATmega4809 nano, and Curiosity AVR128da48 nano.

They all have

    Application version...........1.21.37 (0x01.0x15.0x25)
    Tool pack version .............1.5.210

It does NOT happen with Xplained Nano ATtiny416 (mEDBG) or Xplained Pro (full EDBG)

It does not seem to have a similar problem on PC.

 

Tags:

Tools, Evaluation and Development Kits (AVR-related)
Top
mraardvark
mraardvark's picture
Level: Hangaround
Joined: Mon. Nov 21, 2016
Posts: 151 View posts
Location: Trondheim, Norway
Posted by mraardvark: Fri. Oct 2, 2020 - 05:34 AM
  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

Interesting...

do you have a way to sniff the USB traffic?

Top
westfw
westfw's picture
Level: Raving Lunatic
Joined: Wed. Jun 19, 2002
Posts: 4700 View posts
Location: SF Bay area
Posted by westfw: Sat. Oct 3, 2020 - 08:17 AM
  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

do you have a way to sniff the USB traffic?

No, I don't think so.

Maybe I'll try linux.  I think wireshark will so USB sniffing on linux...

 

Top
ka7ehk
ka7ehk's picture
Level: 10k+ Postman
Joined: Fri. Nov 22, 2002
Posts: 21680 View posts
Location: Tangent, OR, USA
Posted by ka7ehk: Sat. Oct 3, 2020 - 04:03 PM
  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

There is wireshark for Mac.

 

Jim

 

Until Black Lives Matter, we do not have "All Lives Matter"!

 

 

Top
westfw
westfw's picture
Level: Raving Lunatic
Joined: Wed. Jun 19, 2002
Posts: 4700 View posts
Location: SF Bay area
Posted by westfw: Mon. Oct 5, 2020 - 09:52 AM
  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

Linux does not seem to exhibit the problem (and attaching the curiosity to the Linux vm through the Mac does not seem to bother the Mac, either.)

 

Top