• Arnaldo Carvalho de Melo's avatar
    perf tests mmap: Show which tracepoint is failing · 518c6021
    Arnaldo Carvalho de Melo authored
    In the 'perf test "mmap interface"' we try creating events for several
    tracepoints, but when perf_evsel__new() fails we're not showing which
    one is failing, fix that to help diagnosing problems, such as the
    syscall tracepoints ones being found and fixes in this merge window.
    Now the failing tests shows:
      # perf test -v "mmap interface"
     4: Read samples using the mmap interface                 :
      --- start ---
      test child forked, pid 14311
      test child finished with -1
      ---- end ----
      Read samples using the mmap interface: FAILED!
    Now to check why the syscalls:sys_enter_getppid is failing...
      # ls -la /sys/kernel/debug/tracing/events/syscalls/sys_enter_getppid
      ls: cannot access '/sys/kernel/debug/tracing/events/syscalls/sys_enter_getppid': No such file or directory
    Cc: Adrian Hunter <adrian.hunter@intel.com>
    Cc: David Ahern <dsahern@gmail.com>
    Cc: Dominik Brodowski <linux@dominikbrodowski.net>
    Cc: Jiri Olsa <jolsa@kernel.org>
    Cc: Namhyung Kim <namhyung@kernel.org>
    Cc: Steven Rostedt <rostedt@goodmis.org>
    Cc: Wang Nan <wangnan0@huawei.com>
    Link: https://lkml.kernel.org/n/tip-44xk0ycdzrfzx1o9rklf5itl@git.kernel.orgSigned-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
mmap-basic.c 4.17 KB