Thanks for the answer, indeed the second cluster of the board has been halted when I was starting gdb the "normal" way - not adding the second inferior. In my own research I did not find out about these inferiors, so I was wondering why "info threads" did only show one cpu. Maybe gdb could inform the user about unattached inferiors when using "info threads"
-- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1921092 Title: gdbstub debug of multi-cluster machines is undocumented and confusing Status in QEMU: Confirmed Bug description: Working with Zephyr RTOS, running a multi core sample on mps2_an521 works fine. Both cpus start. Trying to debug with options -s -S the second core fails to boot. Posted with explanation also at: https://github.com/zephyrproject- rtos/zephyr/issues/33635 To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1921092/+subscriptions