Perf test -v hangs on beagle x15 device running Linux version stable 4.9 and 4.14 kernel. ( gcc version 7.3.0).

X15 ---- Test breakpoint overflow signal handler: FAILED Test breakpoint overflow sampling : --- start --- test child forked, pid 381 ***Hangs Forever***

Debug log with strace output,

strace -f perf test -v ... [pid 346] perf_event_open({type=PERF_TYPE_BREAKPOINT, size=PERF_ATTR_SIZE_VER5, config=0, ...}, 0, -1, -1, PERF_FLAG_FD_CLOEXEC) = 3 [pid 346] fcntl64(3, F_SETFL, O_RDWR|O_NONBLOCK|O_ASYNC) = 0 [pid 346] fcntl64(3, F_SETSIG, SIGIO) = 0 [pid 346] getpid() = 346 [pid 346] fcntl64(3, F_SETOWN, 346) = 0 [pid 346] ioctl(3, PERF_EVENT_IOC_RESET, 0) = 0 [pid 346] ioctl(3, PERF_EVENT_IOC_ENABLE, 0) = 0 [pid 346] --- SIGIO {si_signo=SIGIO, si_code=POLL_IN, si_band=65} --- [pid 346] rt_sigreturn({mask=[WINCH]}) = 0 ... popping up this log continuesly .... [pid 346] --- SIGIO {si_signo=SIGIO, si_code=POLL_IN, si_band=65} --- [pid 346] rt_sigreturn({mask=[WINCH]}) = 0"}

Ref: Juno/x15: perf: Test breakpoint overflow sampling and test hangs https://bugs.linaro.org/show_bug.cgi?id=4321 Full test log, https://lkft.validation.linaro.org/scheduler/job/655038#L1794 Kernel Config, http://snapshots.linaro.org/openembedded/lkft/lkft/sumo/am57xx-evm/lkft/linu...

Best regards Naresh Kamboju