12806 Serial console polling burns CPU on VMware

Review Request #2568 - Created May 29, 2020 and updated

Information
Gordon Ross
illumos-gate
12806
Reviewers
general

12806 Serial console polling burns CPU on VMware

Setup illumos guest under VMware with serial console
Notes here: https://github.com/jclulow/vmware-sercons
Booted with the change
press Esc to stop at loader prompt
observe laptop fan quiet

Boot the kernel with -kd
while stopped at kmdb prompt
observe laptop fan quiet

During later operation, break into kmdb (telnet send brk, or mdb -K)
observe laptop fan quiet

I did not observe any other behavior changes with this code.

Issues

  • 0
  • 5
  • 0
  • 5
Description From Last Updated
Gordon Ross
Toomas Soome
John Levon
Yuri Pankov
Gordon Ross
Gordon Ross
John Levon
Gordon Ross
Review request changed

Testing Done:

   

Setup illumos guest under VMware with serial console

    Notes here: https://github.com/jclulow/vmware-sercons
    Booted with the change
    press Esc to stop at loader prompt
    observe laptop fan quiet

   
   

Boot the kernel with -kd

    while stopped at kmdb prompt
    observe laptop fan quiet

   
  +

During later operation, break into kmdb (telnet send brk, or mdb -K)

  + observe laptop fan quiet

  +
   

I did not observe any other behavior changes with this code.

Loading...