1. 24 Feb, 2015 1 commit
  2. 23 Feb, 2015 13 commits
  3. 18 Feb, 2015 22 commits
  4. 13 Feb, 2015 4 commits
    • Arnaldo Carvalho de Melo's avatar
      perf trace: Support --events foo:bar --no-syscalls · 726f3234
      Arnaldo Carvalho de Melo authored
      I.e. support tracing just tracepoints, without strace like
      raw_syscalls:*.
      
      [acme@ssdandy linux]$ trace --no-sys --ev sched:*exec,sched:*switch,sched:*exit usleep 1
        0.048 (     ): sched:sched_process_exec:filename=/usr/bin/usleep pid=27298 old_pid=27298)
        0.369 (     ): sched:sched_switch:usleep:27298 [120] S ==> swapper/5:0 [120])
        0.452 (     ): sched:sched_process_exit:comm=usleep pid=27298 prio=120)
      [acme@ssdandy linux]$
      
      TODO: remove that (...) thing when --no-syscalls is specified.
      
      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: Mike Galbraith <efault@gmx.de>
      Cc: Namhyung Kim <namhyung@kernel.org>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Stephane Eranian <eranian@google.com>
      Link: http://lkml.kernel.org/n/tip-vn0hsixsbhm31b2rpj97r96k@git.kernel.orgSigned-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      726f3234
    • Arnaldo Carvalho de Melo's avatar
      perf trace: Allow mixing with other events · 14a052df
      Arnaldo Carvalho de Melo authored
      Basically adopting 'perf record' --event command line argument syntax:
      
       # trace -e \!mprotect,mmap,munmap,open,close,read,fstat,access,arch_prctl --event sched:*switch,sched:*exec,sched:*exit usleep 1
        0.048 (        ): sched:sched_process_exec:filename=/bin/usleep pid=24732 old_pid=24732)
        0.078 (0.002 ms): usleep/24732 brk(                          ) = 0x78f000
        0.430 (0.002 ms): usleep/24732 brk(                          ) = 0x78f000
        0.434 (0.003 ms): usleep/24732 brk(brk: 0x7b0000             ) = 0x7b0000
        0.438 (0.001 ms): usleep/24732 brk(                          ) = 0x7b0000
        0.460 (0.004 ms): usleep/24732 nanosleep(rqtp: 0x7ffff3696a40) ...
        0.460 (        ): sched:sched_switch:prev_comm=usleep prev_pid=24732 prev_prio=120 prev_state=S ==> next_comm=swapper/1 next_pid=0 next_prio=120)
        0.515 (0.058 ms): usleep/24732  ... [continued]: nanosleep()) = 0
        0.520 (0.000 ms): usleep/24732 exit_group(
        0.550 (        ): sched:sched_process_exit:comm=usleep pid=24732 prio=120)
       #
      
      Next steps, probably in this order:
      
      1) Use ordered_events code, the logic in trace needs the events to be
         time ordered when needed, i.e. when multiple CPUs are involved.
      
      2) Callchains!
      
      3) Automatically account for interruptions when saying how long things
         took.
      
      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: Mike Galbraith <efault@gmx.de>
      Cc: Namhyung Kim <namhyung@kernel.org>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Stephane Eranian <eranian@google.com>
      Link: http://lkml.kernel.org/n/tip-gpst8mph575yb4wgf91qibyb@git.kernel.orgSigned-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      14a052df
    • Arnaldo Carvalho de Melo's avatar
      perf trace: Handle multiple threads better wrt syscalls being intermixed · e596663e
      Arnaldo Carvalho de Melo authored
       $ 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: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      e596663e
    • Arnaldo Carvalho de Melo's avatar
      perf trace: Print thread info when following children · 42052bea
      Arnaldo Carvalho de Melo authored
      The default for 'trace workload' is to set perf_event_attr.inherit to 1,
      i.e. to make it equivalent to 'strace -f workload', so we were ending
      with syscalls for multiple processes mixed up, fix it:
      
      Before:
      
        [root@ssdandy ~]# trace -e brk time usleep 1
           0.071 ( 0.002 ms): brk(              ) = 0x100e000
           0.802 ( 0.001 ms): brk(              ) = 0x1d99000
           1.132 ( 0.003 ms): brk(              ) = 0x1d99000
           1.136 ( 0.003 ms): brk(brk: 0x1dba000) = 0x1dba000
           1.140 ( 0.001 ms): brk(              ) = 0x1dba000
        0.00user 0.00system 0:00.00elapsed 63%CPU (0avgtext+0avgdata 528maxresident)k
        0inputs+0outputs (0major+181minor)pagefaults 0swaps
        [root@ssdandy ~]#
      
      After:
      
        [root@ssdandy ~]# trace -f -e brk time usleep 1
           0.072 ( 0.002 ms): time/26308 brk(               ) = 0x1e6e000
           0.860 ( 0.001 ms): usleep/26309 brk(             ) = 0xb91000
           1.193 ( 0.003 ms): usleep/26309 brk(             ) = 0xb91000
           1.197 ( 0.003 ms): usleep/26309 brk(brk: 0xbb2000) = 0xbb2000
           1.201 ( 0.001 ms): usleep/26309 brk(             ) = 0xbb2000
        0.00user 0.00system 0:00.00elapsed 0%CPU (0avgtext+0avgdata 524maxresident)k
        0inputs+0outputs (0major+180minor)pagefaults 0swaps
        [root@ssdandy ~]#
      
      BTW: to achieve the 'strace workload' behaviour, i.e. without a explicit
      '-f', one has to use --no-inherit.
      
      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>
      echo Link: http://lkml.kernel.org/n/tip-`ranpwd -l 24`@git.kernel.org
      Link: http://lkml.kernel.org/n/tip-2wu2d5n65msxoq1i7vtcaft2@git.kernel.orgSigned-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      42052bea