home / code / beam_stats.git / blame
| Commit | Line | Data |
|---|---|---|
| b4e2333f SK |
1 | -module(beam_stats_state). |
| 2 | ||
| 3 | -include("include/beam_stats.hrl"). | |
| 4 | ||
| 5 | -export_type( | |
| 6 | [ t/0 | |
| 7 | ]). | |
| 8 | ||
| 9 | -export( | |
| 10 | [ new/0 | |
| 11 | , update/1 | |
| 12 | , export/1 | |
| 13 | ]). | |
| 14 | ||
| 15 | -record(?MODULE, | |
| 16 | { timestamp :: erlang:timestamp() | |
| 17 | , node_id :: atom() | |
| 18 | , memory :: [{atom(), non_neg_integer()}] | |
| 3fe887d7 | 19 | |
| b4e2333f SK |
20 | , previous_io_bytes_in :: non_neg_integer() |
| 21 | , previous_io_bytes_out :: non_neg_integer() | |
| 22 | , current_io_bytes_in :: non_neg_integer() | |
| 23 | , current_io_bytes_out :: non_neg_integer() | |
| 3fe887d7 SK |
24 | |
| 25 | , previous_context_switches :: non_neg_integer() | |
| 26 | , current_context_switches :: non_neg_integer() | |
| b4e2333f SK |
27 | }). |
| 28 | ||
| 29 | -define(T, #?MODULE). | |
| 30 | ||
| 31 | -opaque t() :: | |
| 32 | ?T{}. | |
| 33 | ||
| 34 | -spec new() -> | |
| 35 | t(). | |
| 36 | new() -> | |
| 37 | { {input , CurrentIOBytesIn} | |
| 38 | , {output , CurrentIOBytesOut} | |
| 39 | } = erlang:statistics(io), | |
| 3fe887d7 | 40 | {CurrentContextSwitches, 0} = erlang:statistics(context_switches), |
| b4e2333f SK |
41 | ?T |
| 42 | { timestamp = os:timestamp() | |
| 43 | , node_id = erlang:node() | |
| 44 | , memory = erlang:memory() | |
| 45 | , previous_io_bytes_in = 0 | |
| 46 | , previous_io_bytes_out = 0 | |
| 47 | , current_io_bytes_in = CurrentIOBytesIn | |
| 48 | , current_io_bytes_out = CurrentIOBytesOut | |
| 3fe887d7 SK |
49 | , previous_context_switches = 0 |
| 50 | , current_context_switches = CurrentContextSwitches | |
| b4e2333f SK |
51 | }. |
| 52 | ||
| 53 | -spec update(t()) -> | |
| 54 | t(). | |
| 55 | update(?T | |
| 56 | { previous_io_bytes_in = PreviousIOBytesIn | |
| 57 | , previous_io_bytes_out = PreviousIOBytesOut | |
| 3fe887d7 | 58 | , previous_context_switches = PreviousContextSwitches |
| b4e2333f SK |
59 | } |
| 60 | ) -> | |
| 61 | { {input , CurrentIOBytesIn} | |
| 62 | , {output , CurrentIOBytesOut} | |
| 63 | } = erlang:statistics(io), | |
| 3fe887d7 | 64 | {CurrentContextSwitches, 0} = erlang:statistics(context_switches), |
| b4e2333f SK |
65 | ?T |
| 66 | { timestamp = os:timestamp() | |
| 67 | , node_id = erlang:node() | |
| 68 | , memory = erlang:memory() | |
| 69 | , previous_io_bytes_in = PreviousIOBytesIn | |
| 70 | , previous_io_bytes_out = PreviousIOBytesOut | |
| 71 | , current_io_bytes_in = CurrentIOBytesIn | |
| 72 | , current_io_bytes_out = CurrentIOBytesOut | |
| 3fe887d7 SK |
73 | , previous_context_switches = PreviousContextSwitches |
| 74 | , current_context_switches = CurrentContextSwitches | |
| b4e2333f SK |
75 | }. |
| 76 | ||
| 77 | -spec export(t()) -> | |
| 78 | beam_stats:t(). | |
| 79 | export( | |
| 80 | ?T | |
| 81 | { timestamp = Timestamp | |
| 82 | , node_id = NodeID | |
| 83 | , memory = Memory | |
| 84 | , previous_io_bytes_in = PreviousIOBytesIn | |
| 85 | , previous_io_bytes_out = PreviousIOBytesOut | |
| 86 | , current_io_bytes_in = CurrentIOBytesIn | |
| 87 | , current_io_bytes_out = CurrentIOBytesOut | |
| 3fe887d7 SK |
88 | , previous_context_switches = PreviousContextSwitches |
| 89 | , current_context_switches = CurrentContextSwitches | |
| b4e2333f SK |
90 | } |
| 91 | ) -> | |
| 92 | #beam_stats | |
| 93 | { timestamp = Timestamp | |
| 94 | , node_id = NodeID | |
| 95 | , memory = Memory | |
| 96 | , io_bytes_in = CurrentIOBytesIn - PreviousIOBytesIn | |
| 97 | , io_bytes_out = CurrentIOBytesOut - PreviousIOBytesOut | |
| 3fe887d7 | 98 | , context_switches = CurrentContextSwitches - PreviousContextSwitches |
| b4e2333f | 99 | }. |