1. 14 2月, 2015 1 次提交
    • A
      perf trace: Handle multiple threads better wrt syscalls being intermixed · e596663e
      Arnaldo Carvalho de Melo 提交于
       $ trace time taskset -c 0 usleep 1
         0.845 ( 0.021 ms): time/16722 wait4(upid: 4294967295, stat_addr: 0x7fff17f443d4, ru: 0x7fff17f44438 ) ...
         0.865 ( 0.008 ms): time/16723 execve(arg0: 140733595272004, arg1: 140733595272720, arg2: 140733595272768, arg3: 139755107218496, arg4: 7307199665339051828, arg5: 3) = -2
         2.395 ( 1.523 ms): taskset/16723 execve(arg0: 140733595272013, arg1: 140733595272720, arg2: 140733595272768, arg3: 139755107218496, arg4: 7307199665339051828, arg5: 3) = 0
         2.411 ( 0.002 ms): taskset/16723 brk(                                                                  ) = 0x1915000
         3.300 ( 0.058 ms): usleep/16723 nanosleep(rqtp: 0x7ffff4ada190                                        ) = 0
       <SNIP>
         3.305 ( 0.000 ms): usleep/16723 exit_group(
         3.363 ( 2.539 ms): time/16722  ... [continued]: wait4()) = 16723
         3.366 ( 0.001 ms): time/16722 rt_sigaction(sig: INT, act: 0x7fff17f44160, oact: 0x7fff17f44200, sigsetsize: 8) = 0
      
      We we're not seeing this line:
      
        0.845 ( 0.021 ms): time/16722 wait4(upid: 4294967295, stat_addr: 0x7fff17f443d4, ru: 0x7fff17f44438 ) ...
      
      just the one when it finishes:
      
        3.363 ( 2.539 ms): time/16722  ... [continued]: wait4()) = 16723
      
      Still some issues left till we move to ordered_samples when multiple
      CPUs/threads are involved...
      
      Cc: Adrian Hunter <adrian.hunter@intel.com>
      Cc: Borislav Petkov <bp@suse.de>
      Cc: David Ahern <dsahern@gmail.com>
      Cc: Don Zickus <dzickus@redhat.com>
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      Cc: Jiri Olsa <jolsa@redhat.com>
      Cc: Namhyung Kim <namhyung@kernel.org>
      Cc: Stephane Eranian <eranian@google.com>
      Link: http://lkml.kernel.org/n/tip-zq9x30a1ky3djqewqn2v3ja3@git.kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      e596663e
  2. 13 2月, 2015 23 次提交
  3. 12 2月, 2015 16 次提交