Public bug reported: == Comment: # - Shriya R. Kulkarni <> - 2017-06-14 01:11:02 == Problem Description : ============= perf test is hung at Breakpoint overflow signal handler.
Machine details : ========== System : WSP , P9 baremetal. OS : Ubuntu 16.04.03 uname -a : Linux ltc-wspoon3 4.10.0-23-generic #25~16.04.1-Ubuntu SMP Fri Jun 9 10:43:34 UTC 2017 ppc64le ppc64le ppc64le GNU/Linux Testing: ==== root@ltc-wspoon3:~# perf test 1: vmlinux symtab matches kallsyms : Skip 2: Detect openat syscall event : Ok 3: Detect openat syscall event on all cpus : Ok 4: Read samples using the mmap interface : Ok 5: Parse event definition strings : Ok 6: PERF_RECORD_* events & perf_sample fields : Ok 7: Parse perf pmu format : Ok 8: DSO data read : Ok 9: DSO data cache : Ok 10: DSO data reopen : Ok 11: Roundtrip evsel->name : Ok 12: Parse sched tracepoints fields : Ok 13: syscalls:sys_enter_openat event fields : Ok 14: Setup struct perf_event_attr : Skip 15: Match and link multiple hists : Ok 16: 'import perf' in python : Ok 17: Breakpoint overflow signal handler :^C root@ltc-wspoon3:~# perf test -v 17 17: Breakpoint overflow signal handler : --- start --- test child forked, pid 3802 failed opening event 0 failed opening event 0 Attach : strace output. Steps to reproduce : ============ 1. Install perf. 2. Run perf test. 3. When system hangs , exit it by : ^c. == Comment: # - Ravikumar B. Bangoria <> - 2017-07-13 04:44:29 == Shriya, Can you please check after applying: https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/commit/?id=d89ba5353f301971dd7d2f9fdf25c4432728f38e == Comment: # - Shriya R. Kulkarni <> - 2017-07-19 06:28:13 == Verified and Tested on Ubuntu 16.04.03: ========================= uname -a : 4.10.0-27-generic System : Boston Testing without patch using distro perf: ======================== root@ltc-boston27:~# perf test 1: vmlinux symtab matches kallsyms : Skip 2: Detect openat syscall event : Ok 3: Detect openat syscall event on all cpus : Ok 4: Read samples using the mmap interface : Ok 5: Parse event definition strings : Ok 6: PERF_RECORD_* events & perf_sample fields : Ok 7: Parse perf pmu format : Ok 8: DSO data read : Ok 9: DSO data cache : Ok 10: DSO data reopen : Ok 11: Roundtrip evsel->name : Ok 12: Parse sched tracepoints fields : Ok 13: syscalls:sys_enter_openat event fields : Ok 14: Setup struct perf_event_attr : Skip 15: Match and link multiple hists : Ok 16: 'import perf' in python : Ok 17: Breakpoint overflow signal handler :^C root@ltc-boston27:~# Testing with Patch using distro perf : ====================== root@ltc-boston27:~/linux-hwe-4.10.0/tools/perf# ./perf test 1: vmlinux symtab matches kallsyms : Ok 2: Detect openat syscall event : Ok 3: Detect openat syscall event on all cpus : Ok 4: Read samples using the mmap interface : Ok 5: Parse event definition strings : Ok 6: PERF_RECORD_* events & perf_sample fields : Ok 7: Parse perf pmu format : Ok 8: DSO data read : Ok 9: DSO data cache : Ok 10: DSO data reopen : Ok 11: Roundtrip evsel->name : Ok 12: Parse sched tracepoints fields : Ok 13: syscalls:sys_enter_openat event fields : Ok 14: Setup struct perf_event_attr : Ok 15: Match and link multiple hists : Ok 16: 'import perf' in python : Ok 17: Breakpoint overflow signal handler : FAILED! 18: Breakpoint overflow sampling : FAILED! 19: Number of exit events of a simple workload : Ok 20: Software clock events period values : Ok 21: Object code reading : FAILED! 22: Sample parsing : Ok 23: Use a dummy software event to keep tracking: Ok 24: Parse with no sample_id_all bit set : Ok 25: Filter hist entries : Ok 26: Lookup mmap thread : Ok 27: Share thread mg : Ok 28: Sort output of hist entries : Ok 29: Cumulate child hist entries : Ok 30: Track with sched_switch : Ok 31: Filter fds with revents mask in a fdarray : Ok 32: Add fd to a fdarray, making it autogrow : Ok 33: kmod_path__parse : Ok 34: Thread map : Ok 35: LLVM search and compile : 35.1: Basic BPF llvm compile : Skip 35.2: kbuild searching : Skip 35.3: Compile source for BPF prologue generation: Skip 35.4: Compile source for BPF relocation : Skip 36: Session topology : Ok 37: BPF filter : 37.1: Basic BPF filtering : Skip 37.2: BPF relocation checker : Skip 38: Synthesize thread map : Ok 39: Remove thread map : Ok 40: Synthesize cpu map : Ok 41: Synthesize stat config : Ok 42: Synthesize stat : Ok 43: Synthesize stat round : Ok 44: Synthesize attr update : Ok 45: Event times : Ok 46: Read backward ring buffer : Ok 47: Print cpu map : Ok 48: Probe SDT events : Ok 49: is_printable_array : Ok 50: Print bitmap : Ok 51: perf hooks : Ok 52: builtin clang support : Skip (not compiled in) 53: Test dwarf unwind : Ok ** Affects: kernel-package (Ubuntu) Importance: Undecided Assignee: Ubuntu on IBM Power Systems Bug Triage (ubuntu-power-triage) Status: New ** Tags: architecture-ppc64le bugnameltc-155718 severity-high targetmilestone-inin16043 ** Tags added: architecture-ppc64le bugnameltc-155718 severity-high targetmilestone-inin16043 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1711075 Title: [Power 9, Power NV][WSP/Boston]Ubuntu 16.04.03 : perf test is hung at Breakpoint overflow signal handler To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/kernel-package/+bug/1711075/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
