[macOS] kernel_task and gotop

[xxxserxxx]

Required information:

• gotop version (gotop -V):
  3.0.0
• The output of uname -a:
  Darwin catfromhell-pro.local 18.5.0 Darwin Kernel Version 18.5.0: Mon Mar 11 20:40:32 PDT 2019; root:xnu-4903.251.3~3/RELEASE_X86_64 x86_64
• Terminal emulator (e.g. iTerm or gnome terminal):
  iTerm
• Any relevenat hardware info:
  

Gotop was overload kernel_task on macOS(default gotop settings)

Original task cjbassi#142
Original submitter @barbariska108

[xxxserxxx]

I'm not very familiar with macOS, but isn't kernel_task just a kernel thread? Is the issue that gotop was causing kernel_task to use a lot of resources or was it something else?

[xxxserxxx]

I'm not very familiar with macOS, but isn't kernel_task just a kernel thread? Is the issue that gotop was causing kernel_task to use a lot of resources or was it something else?

Use-case:

• Start gotop

• Wait 5 mins

• kernel_task overload CPU

• Closing gotop and kernel_task stops overloading CPU

[jmuchovej]

kernel_task has PID 0, I'm not sure what that maps to in Linux, but launchd is analogous to /sbin/init, I believe – as it's PID 1 and all processes are children of it.

Not sure if it helps, but I do have access to MacOS, so I think I can contribute at least on the exploration and understanding side of things.

[xxxserxxx]

@ionlights have you been able to replicate this issue?

@barbariska108 Do you still see this?

[jmuchovej]

So, I don't believe this is an issue? Ideally, @barbariska108 could comment on the behavior?

The percentages are UNIX-style, so 100% could just mean that a single thread is at 100%. Based on the specs I believe the maximum % would be 800%? The image attached shows ~500%, so over half their machine is being utilized.

I honestly don't think this is a bug? I've had gotop running with high load on kernel_task, but whenever I launch gotop, I'm also doing some pretty intense work on my machine anyways. 😅

[barbariska108]

@xxxserxxx @ionlights, I've now install the last update and this issue resolved.

[xxxserxxx]

@ionlights & @barbariska108 , thank you!