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b4e2333f SK |
1 | -module(beam_stats_state). |
2 | ||
3 | -include("include/beam_stats.hrl"). | |
5eba068e SK |
4 | -include("include/beam_stats_process.hrl"). |
5 | -include("include/beam_stats_processes.hrl"). | |
b4e2333f SK |
6 | |
7 | -export_type( | |
8 | [ t/0 | |
9 | ]). | |
10 | ||
11 | -export( | |
12 | [ new/0 | |
13 | , update/1 | |
14 | , export/1 | |
15 | ]). | |
16 | ||
28c1d03a SK |
17 | -record(snapshots, |
18 | { memory :: [{atom(), non_neg_integer()}] | |
5eba068e | 19 | , processes :: beam_stats_processes:t() |
28c1d03a | 20 | , run_queue :: non_neg_integer() |
a8d431d1 | 21 | , ets :: beam_stats_ets:t() |
28c1d03a | 22 | }). |
3fe887d7 | 23 | |
28c1d03a SK |
24 | -type snapshots() :: |
25 | #snapshots{}. | |
26 | ||
27 | -record(deltas, | |
28 | { reductions :: non_neg_integer() | |
29 | }). | |
30 | ||
31 | -type deltas() :: | |
32 | #deltas{}. | |
33 | ||
34 | -record(totals, | |
35 | { io_bytes_in :: non_neg_integer() | |
36 | , io_bytes_out :: non_neg_integer() | |
37 | , context_switches :: non_neg_integer() | |
38 | }). | |
3fe887d7 | 39 | |
28c1d03a SK |
40 | -type totals() :: |
41 | #totals{}. | |
142c0796 | 42 | |
28c1d03a SK |
43 | -record(?MODULE, |
44 | { timestamp :: erlang:timestamp() | |
45 | , node_id :: atom() | |
46 | , snapshots :: snapshots() % Current state | |
47 | , deltas :: deltas() % Accumulated since last check | |
48 | , totals_previous :: totals() % Accumulated since VM start, as of last state | |
49 | , totals_current :: totals() % Accumulated since VM start, as of this state | |
b4e2333f SK |
50 | }). |
51 | ||
52 | -define(T, #?MODULE). | |
53 | ||
54 | -opaque t() :: | |
55 | ?T{}. | |
56 | ||
57 | -spec new() -> | |
58 | t(). | |
59 | new() -> | |
28c1d03a SK |
60 | TotalsPrevious = totals_empty(), |
61 | new(TotalsPrevious). | |
62 | ||
63 | -spec new(TotalsPrevious :: totals()) -> | |
64 | t(). | |
65 | new(#totals{}=TotalsPrevious) -> | |
b4e2333f | 66 | ?T |
aa4143aa SK |
67 | { timestamp = beam_stats_source:os_timestamp() |
68 | , node_id = beam_stats_source:erlang_node() | |
28c1d03a SK |
69 | , snapshots = snapshots_new() |
70 | , deltas = deltas_new() | |
71 | , totals_previous = TotalsPrevious | |
72 | , totals_current = totals_new() | |
b4e2333f SK |
73 | }. |
74 | ||
75 | -spec update(t()) -> | |
76 | t(). | |
28c1d03a SK |
77 | update(?T{totals_current=TotalsPrevious}) -> |
78 | new(TotalsPrevious). | |
b4e2333f SK |
79 | |
80 | -spec export(t()) -> | |
81 | beam_stats:t(). | |
82 | export( | |
83 | ?T | |
28c1d03a SK |
84 | { timestamp = Timestamp |
85 | , node_id = NodeID | |
86 | , snapshots = | |
87 | #snapshots | |
88 | { memory = Memory | |
5eba068e | 89 | , processes = Processes |
28c1d03a | 90 | , run_queue = RunQueue |
a8d431d1 | 91 | , ets = ETS |
28c1d03a SK |
92 | } |
93 | , deltas = | |
94 | #deltas | |
95 | { reductions = Reductions | |
96 | } | |
97 | , totals_previous = | |
98 | #totals | |
99 | { io_bytes_in = PreviousIOBytesIn | |
100 | , io_bytes_out = PreviousIOBytesOut | |
101 | , context_switches = PreviousContextSwitches | |
102 | } | |
103 | , totals_current = | |
104 | #totals | |
105 | { io_bytes_in = CurrentIOBytesIn | |
106 | , io_bytes_out = CurrentIOBytesOut | |
107 | , context_switches = CurrentContextSwitches | |
108 | } | |
b4e2333f SK |
109 | } |
110 | ) -> | |
111 | #beam_stats | |
28c1d03a SK |
112 | { timestamp = Timestamp |
113 | , node_id = NodeID | |
114 | , memory = Memory | |
115 | , io_bytes_in = CurrentIOBytesIn - PreviousIOBytesIn | |
116 | , io_bytes_out = CurrentIOBytesOut - PreviousIOBytesOut | |
3fe887d7 | 117 | , context_switches = CurrentContextSwitches - PreviousContextSwitches |
142c0796 | 118 | , reductions = Reductions |
deefeb3c | 119 | , run_queue = RunQueue |
a8d431d1 | 120 | , ets = ETS |
5eba068e | 121 | , processes = Processes |
b4e2333f | 122 | }. |
28c1d03a SK |
123 | |
124 | snapshots_new() -> | |
125 | #snapshots | |
aa4143aa | 126 | { memory = beam_stats_source:erlang_memory() |
5eba068e | 127 | , processes = beam_stats_processes:collect() |
aa4143aa | 128 | , run_queue = beam_stats_source:erlang_statistics(run_queue) |
a8d431d1 | 129 | , ets = beam_stats_ets:collect() |
28c1d03a SK |
130 | }. |
131 | ||
132 | deltas_new() -> | |
aa4143aa | 133 | {_ReductionsTotal, ReductionsDelta} = beam_stats_source:erlang_statistics(reductions), |
28c1d03a SK |
134 | #deltas |
135 | { reductions = ReductionsDelta | |
136 | }. | |
137 | ||
138 | totals_new() -> | |
139 | { {input , IOBytesIn} | |
140 | , {output , IOBytesOut} | |
aa4143aa SK |
141 | } = beam_stats_source:erlang_statistics(io), |
142 | {ContextSwitches, 0} = beam_stats_source:erlang_statistics(context_switches), | |
28c1d03a SK |
143 | #totals |
144 | { io_bytes_in = IOBytesIn | |
145 | , io_bytes_out = IOBytesOut | |
146 | , context_switches = ContextSwitches | |
147 | }. | |
148 | ||
149 | totals_empty() -> | |
150 | #totals | |
151 | { io_bytes_in = 0 | |
152 | , io_bytes_out = 0 | |
153 | , context_switches = 0 | |
154 | }. |