root@3bd53e4a7fe4:/# dtrace -n 'lx-syscall::open:entry/execname=="node"/ {  @num[jstack()] = count() }'
dtrace: description 'lx-syscall::open:entry' matched 2 probes
^C


              libc.so.6`open+0x10
              libc.so.6`sysconf+0x54c
              node`_ZN2v88internal20MarkCompactCollector31NumberOfParallelCompactionTasksEil+0x46
              node`_ZN2v88internal20MarkCompactCollector23EvacuatePagesInParallelEv+0xea
              node`_ZN2v88internal20MarkCompactCollector29EvacuateNewSpaceAndCandidatesEv+0x67
              node`_ZN2v88internal20MarkCompactCollector14CollectGarbageEv+0x29
              node`_ZN2v88internal4Heap11MarkCompactEv+0x6d
              node`_ZN2v88internal4Heap24PerformGarbageCollectionENS0_16GarbageCollectorENS_15GCCallbackFlagsE+0x4b0
              node`_ZN2v88internal4Heap14CollectGarbageENS0_16GarbageCollectorEPKcS4_NS_15GCCallbackFlagsE+0x142
              node`_ZN2v88internal4Heap15HandleGCRequestEv+0x84
              node`_ZN2v88internal10StackGuard16HandleInterruptsEv+0x31c
              node`_ZN2v88internal18Runtime_StackGuardEiPPNS0_6ObjectEPNS0_7IsolateE+0x45
              0x2bd84b30961b
              0x2bd84b44e1f9
              0x2bd84b4490eb
              0x2bd84b44281b
              0x2bd84b30d157
              0x2bd84b442615
              0x2bd84b337f84
              0x2bd84b322922
              node`_ZN2v88internal12_GLOBAL__N_16InvokeEPNS0_7IsolateEbNS0_6HandleINS0_6ObjectEEES6_iPS6_S6_+0xb3
              node`_ZN2v88internal9Execution4CallEPNS0_7IsolateENS0_6HandleINS0_6ObjectEEES6_iPS6_+0x61
              node`_ZN2v88Function4CallENS_5LocalINS_7ContextEEENS1_INS_5ValueEEEiPS5_+0x139
              node`_ZN2v88Function4CallENS_5LocalINS_5ValueEEEiPS3_+0x41
              node`_ZN4node9AsyncWrap12MakeCallbackEN2v85LocalINS1_8FunctionEEEiPNS2_INS1_5ValueEEE+0x149
              node`_ZN4nodeL5AfterEP7uv_fs_s+0x146
              node`uv__work_done+0xa5
              node`uv__async_event+0xab
              node`uv__async_io+0xa3
              node`uv__io_poll+0x3a0
              node`uv_run+0x156
              node`_ZN4node5StartEiPPc+0x468
              libc.so.6`__libc_start_main+0xf5
                2

              libpthread.so.0`open+0x2d
              node`worker+0xa1
              node`uv__thread_start+0x19
              libpthread.so.0`start_thread+0xc4
            62043