while debugging, one core constantly running

got a new laptop, installed 18a. If I'm debugging, one of my cpu cores is constantly railing (i.e. task manager says matlab is using ~25% cpu) and it decreases battery life.

Also, sometimes matlab freezes, when I'm not looking at it, and I have to restart

[Viacheslav Klimentyev]

Do you use Win or Linux version of MATLAB?

[Michael Benton]

win

[Richard Crozier]

same issue Linux R2018a, 100% cpu when debugging

Answer 1

[Philip Borghesani]

It appears you have encountered this issue: Bug report 1736753 I suggest contacting support for possible workarounds and solutions. You may find that closing extra figure or MATLAB desktop windows makes the problem go away the next time you debug. Using breakpoints instead of dbstep may also help.

[Michael Benton]

closing all figures and using breakpoints does not solve the problem. Will contact support, likely stick to 2017B

Answer 2

[Viacheslav Klimentyev]

I've the same problem on Linux (MATLAB 2018a). The load of one core is about 80-90% at using breakpoint.

Answer 3

[Jos Koning]

Same problem on win10+ matlab 2018a. Upgraded yesterday from 2016. Breakpoint at first statement in script. workload to 50%.

[Viacheslav Klimentyev]

The bug was fixed in 2018b. I tested on my Linux PC.