dtrace Erlang VM GC

gistfile1.txt

dtrace -p $(pgrep beam.smp) -n 'pid$target::collect_heap_frags*:entry {print(*args[0]);}'

 10   5214         collect_heap_frags:entry Process {
    ErtsPTabElementCommon common = {
        Eterm id = 0x13000000263
        ethr_atomic32_t refc = {
            volatile ethr_sint32_t counter = 0x1
        }
        Eterm tracer_proc = 0xfffffffffffffffb
        Uint trace_flags = 0
        union u = {
            struct alive = {
                Uint64 started_interval = 0
                struct reg_proc *reg = 0
                ErtsLink *links = 0xfffffd7ffad80180
                ErtsMonitor *monitors = 0
                ErtsSmpPTimer *ptimer = 0
            }
            ErtsThrPrgrLaterOp release = {
                ErtsThrPrgrVal later = 0
                void (*)() func = 0
                void *data = 0xfffffd7ffad80180
                ErtsThrPrgrLaterOp *next = 0
            }
        }
    }
    Eterm *htop = 0xfffffd7ffa5a0b78
    Eterm *stop = 0xfffffd7ffa5a0b78
    Eterm *heap = 0xfffffd7ffa59d9b0
    Eterm *hend = 0xfffffd7ffa5a0ba0
    Uint heap_sz = 0x63e
    Uint min_heap_size = 0xe9
    Uint min_vheap_size = 0xb556
    Uint arity = 0x3
    Eterm *arg_reg = 0xfffffd7ffad85e50
    unsigned int max_arg_reg = 0x6
    Eterm [6] def_arg_reg = [ 0x2b4b, 0xb4b, 0xfffffd7ffc79b711, 0, 0, 0x7d0 ]
    BeamInstr *cp = 0
    BeamInstr *i = 0x817e00
    Sint catches = 0
    Sint fcalls = 0xf7
    Uint32 rcount = 0
    int schedule_count = 0
    Uint reds = 0
    Eterm group_leader = 0xc800000193
    Uint flags = 0
    Eterm fvalue = 0xfffffffffffffffb
    Uint freason = 0
    Eterm ftrace = 0xfffffffffffffffb
    Process *next = 0xfffffd7ffad86088
    struct ErtsNodesMonitor_ *nodes_monitors = 0
    ErtsSuspendMonitor *suspend_monitors = 0
    ErlMessageQueue msg = {
        ErlMessage *first = 0
        ErlMessage **last = 0xfffffd7ffad85ef0
        ErlMessage **save = 0xfffffd7ffad85ef0
        Sint len = 0
        BeamInstr *mark = 0
        ErlMessage **saved_last = 0
    }
    ErlExtraRootSet *extra_root = 0
    union u = {
        ErtsBifTimer *bif_timers = 0
        void *terminate = 0
    }
    ProcDict *dictionary = 0
    Uint seq_trace_clock = 0
    Uint seq_trace_lastcnt = 0
    Eterm seq_trace_token = 0xfffffffffffffffb
    Eterm dt_utag = 0xfffffffffffffffb
    Uint dt_utag_flags = 0
    BeamInstr [3] initial = [ 0x2b4b, 0xb4b, 0x2 ]
    BeamInstr *current = 0xfffffd7ffad85f60
    Eterm parent = 0x10000000203
    erts_approx_time_t approx_started = 0x5500d2d8
    Eterm *high_water = 0xfffffd7ffa59db58
    Eterm *old_hend = 0xfffffd7ffa597d08
    Eterm *old_htop = 0xfffffd7ffa597148
    Eterm *old_heap = 0xfffffd7ffa597148
    Uint16 gen_gcs = 0x4
    Uint16 max_gen_gcs = 0xffff
    ErlOffHeap off_heap = {
        struct erl_off_heap_header *first = 0
        Uint64 overhead = 0
    }
    ErlHeapFragment *mbuf = 0xfffffd7ffc7be798
    Uint mbuf_sz = 0x35
    ErtsPSD *psd = 0
    Uint64 bin_vheap_sz = 0xb556
    Uint64 bin_vheap_mature = 0
    Uint64 bin_old_vheap_sz = 0xb556
    Uint64 bin_old_vheap = 0
    ethr_atomic32_t state = {
        volatile ethr_sint32_t counter = 0x2a2
    }
    ErlMessageInQueue msg_inq = {
        ErlMessage *first = 0
        ErlMessage **last = 0xfffffd7ffad86008
        Sint len = 0
    }
    ErtsPendExit pending_exit = {
        Eterm reason = 0
        ErlHeapFragment *bp = 0
    }
    erts_proc_lock_t lock = {
        ethr_atomic32_t flags = {
            volatile ethr_sint32_t counter = 0x1
        }
        erts_tse_t *[4] queue = [ 0, 0, 0, 0 ]
        ethr_atomic32_t refc = {
            volatile ethr_sint32_t counter = 0x1
        }
    }
    ErtsSchedulerData *scheduler_data = 0xfffffd7ffa635d40
    Eterm suspendee = 0xfffffffffffffffb
    ErtsPendingSuspend *pending_suspenders = 0
    ethr_atomic_t run_queue = {
        volatile ethr_sint64_t counter = 0xfffffd7ffa601640
    }
}