contrib/debug_tools/crash-find-unique-traces.awk

   1 #!/usr/bin/awk -f
   2
   3 function add_unique_chain(chain) {
   4         for (i = 0; i < unique_nr; i++) {
   5                 if (unique[i] == chain) {
   6                         return 0
   7                 }
   8         }
   9         unique_pids[unique_nr] = unique_pids[unique_nr] current_pid " "
  10         unique[unique_nr++] = chain
  11 }
  12
  13 function dump_chain()
  14 {
  15         if (collect_chain) {
  16                 #print pl_cmdname,pl_pid
  17                 add_unique_chain(chain)
  18                 chain=""
  19                 collect_chain=0
  20         }
  21 }
  22
  23 /^PID:/ {
  24         traces++
  25         dump_chain()
  26         collect_chain=1
  27         current_pid=$2
  28 }
  29
  30 /#[0-9]* / {
  31         tmp=$3
  32         #if (start_to_analyze==0)
  33         #       next
  34         if (collect_chain==0)
  35                 next
  36         if (index(tmp, "do_syscall_64"))
  37                 next
  38         if (index(tmp, "ret_from_fork"))
  39                 next
  40         if (index(tmp, "entry_SYSCALL"))
  41                 next
  42         #sub("[+]0x[0-9a-f]+[/].*", "", tmp)
  43         if (chain=="")
  44                 chain=tmp
  45         else
  46                 chain=chain","tmp
  47 }
  48
  49 /ret_from_fork/ {
  50         dump_chain()
  51 }
  52
  53 /entry_SYSCALL/ {
  54         dump_chain()
  55 }
  56
  57 END {
  58         not_interesting[0]="schedule,ldlm_bl_thread_main,kthread"
  59         not_interesting[1]="schedule,ptlrpcd,kthread"
  60         not_interesting[2]="schedule,mgc_requeue_thread,kthread"
  61         not_interesting[3]="schedule,schedule_timeout,ksocknal_connd,kthread"
  62         not_interesting[4]="schedule,ptlrpc_hr_main,kthread"
  63         not_interesting[5]="schedule,ksocknal_scheduler"
  64         not_interesting[6]="schedule,osp_precreate_thread"
  65         not_interesting[7]="schedule,mgs_ir_notify,kthread"
  66         not_interesting[8]="schedule,qmt_reba_thread,kthread"
  67         not_interesting[9]="schedule,expired_lock_main,kthread"
  68         not_interesting[10]="schedule,schedule_timeout,lnet_peer_discovery,kthread"
  69         not_interesting[11]="schedule,ping_evictor_main,kthread"
  70         not_interesting[12]="schedule,schedule_timeout,qsd_upd_thread,kthread"
  71         not_interesting[13]="schedule,ptlrpc_wait_event,ptlrpc_main,kthread"
  72         not_interesting[14]="schedule,lnet_sock_accept,lnet_acceptor,kthread"
  73         not_interesting[15]="schedule,schedule_timeout,lnet_monitor_thread,kthread"
  74         not_interesting[16]="schedule,ofd_inconsistency_verification_main,kthread"
  75         not_interesting[17]="schedule,schedule_timeout,ksocknal_reaper,kthread"
  76         not_interesting[18]="schedule,kjournald2,kthread"
  77         not_interesting[19]="schedule,rescuer_thread,kthread"
  78         not_interesting[20]="schedule,oom_reaper,kthread"
  79         not_interesting[21]="schedule,worker_thread,kthread"
  80         not_interesting[22]="schedule,kthread_worker_fn,kthread"
  81         not_interesting[23]="schedule,osp_sync_process_queues,llog_process_thread,llog_process_or_fork,llog_cat_process_cb,llog_process_thread,llog_process_or_fork,llog_cat_process_or_fork,llog_cat_process,osp_sync_thread,kthread"
  82         not_interesting[24]="schedule,smpboot_thread_fn,kthread"
  83         not_interesting[25]="schedule,schedule_timeout,rcu_gp_kthread,kthread"
  84         not_interesting[26]="schedule,rcu_gp_kthread,kthread"
  85         not_interesting[27]="schedule,devtmpfsd,kthread"
  86         not_interesting[28]="schedule,schedule_timeout,watchdog,kthread"
  87         not_interesting[29]="schedule,oom_reaper"
  88         not_interesting[30]="schedule,kcompactd,kthread"
  89         not_interesting[31]="schedule,schedule_timeout,khugepaged,kthread"
  90         not_interesting[32]="schedule,kswapd,kthread"
  91         not_interesting[33]="schedule,schedule_hrtimeout_range_clock,do_sys_poll,__se_sys_poll"
  92         not_interesting[34]="schedule,schedule_hrtimeout_range_clock,do_select,core_sys_select,kern_select,__x64_sys_select"
  93         not_interesting[35]="schedule,schedule_hrtimeout_range_clock,__se_sys_rt_sigtimedwait"
  94         not_interesting[36]="schedule,do_wait,kernel_wait4,__se_sys_wait4"
  95         not_interesting[37]="schedule,schedule_timeout,wait_for_common,lnet_monitor_thread,kthread"
  96         not_interesting[38]="schedule,schedule_hrtimeout_range_clock,ep_poll,do_epoll_wait,__x64_sys_epoll_wait"
  97         not_interesting[39]="schedule,kthreadd"
  98         not_interesting[40]="schedule,khvcd,kthread"
  99         not_interesting[41]="schedule,schedule_timeout,ptlrpcd,kthread"
 100         not_interesting[42]="schedule,schedule_timeout,mdt_coordinator,kthread"
 101         not_interesting[43]="schedule,distribute_txn_commit_thread,kthread"
 102         not_interesting[44]="schedule,lnet_acceptor,kthread"
 103         not_interesting[45]="schedule,osp_send_update_thread,kthread"
 104         not_interesting[46]="schedule,pipe_wait,pipe_read,__vfs_read,vfs_read,ksys_read"
 105         not_interesting[47]="default_idle,do_idle,cpu_startup_entry,start_kernel,secondary_startup_64"
 106         not_interesting[48]="default_idle,do_idle,cpu_startup_entry,secondary_startup_64"
 107         not_interesting[49]="do_select,core_sys_select,kern_select,__x64_sys_select"
 108
 109 #not_interesting[]=""
 110 #not_interesting[]=""
 111 #schedule,kthreadd
 112
 113         for (i = 0; i < unique_nr; i++) {
 114                 dump=1
 115                 for (j in not_interesting) {
 116                         if (index(unique[i], not_interesting[j])) {
 117                                 dump=0
 118                                 break
 119                         }
 120                         if (unique[i]==not_interesting[j]) {
 121                                 dump=0
 122                                 break
 123                         }
 124                 }
 125                 if (dump)
 126                         print unique[i],"PIDs:",unique_pids[i]
 127         }
 128
 129 }
 130