[BUG] likwid's child processes survive when likwid parent is terminated

[jdomke]

$ killall cholesky_EXTRALARGE; timeout --foreground --kill-after=5s 20s likwid-perfctr --marker -C 20 -g MEM polybench/linear-algebra/solvers/cholesky/cholesky_EXTRALARGE ; ps aux | grep cholesky_EXTRALARGE
--------------------------------------------------------------------------------
CPU name:
CPU type:       Fujitsu A64FX
CPU clock:      0.00 GHz
--------------------------------------------------------------------------------
                 356:   domke      86551 97.6  0.8 274880 267968 pts/0   R    17:41   0:23 polybench/linear-algebra/solvers/cholesky/cholesky_EXTRALARGE

Expected behavior: no cholesky_EXTRALARGE found

(i found some signal handler code in likwid which "should" terminate its children upon receiving SigINT, but even with "timeout -s SIGINT..." i'm still seeing cholesky_EXTRALARGE running afterwards)

[TomTheBear]

Thanks for reporting. Yes this might happen in some situations where the waiting for the child process fails. I will take a look.