Line data Source code
1 : use desim::proto::SimEvent;
2 : use tracing::debug;
3 :
4 : #[derive(Debug, Clone, PartialEq, Eq)]
5 : enum NodeKind {
6 : Unknown,
7 : Safekeeper,
8 : WalProposer,
9 : }
10 :
11 : impl Default for NodeKind {
12 42807 : fn default() -> Self {
13 42807 : Self::Unknown
14 42807 : }
15 : }
16 :
17 : /// Simulation state of walproposer/safekeeper, derived from the simulation logs.
18 : #[derive(Clone, Debug, Default)]
19 : struct NodeInfo {
20 : kind: NodeKind,
21 :
22 : // walproposer
23 : is_sync: bool,
24 : term: u64,
25 : epoch_lsn: u64,
26 :
27 : // safekeeper
28 : commit_lsn: u64,
29 : flush_lsn: u64,
30 : }
31 :
32 : impl NodeInfo {
33 75923 : fn init_kind(&mut self, kind: NodeKind) {
34 75923 : if self.kind == NodeKind::Unknown {
35 42810 : self.kind = kind;
36 42810 : } else {
37 33113 : assert!(self.kind == kind);
38 : }
39 75923 : }
40 :
41 75923 : fn started(&mut self, data: &str) {
42 75923 : let mut parts = data.split(';');
43 75923 : assert!(parts.next().unwrap() == "started");
44 75923 : match parts.next().unwrap() {
45 75923 : "safekeeper" => {
46 39116 : self.init_kind(NodeKind::Safekeeper);
47 39116 : }
48 36807 : "walproposer" => {
49 36807 : self.init_kind(NodeKind::WalProposer);
50 36807 : let is_sync: u8 = parts.next().unwrap().parse().unwrap();
51 36807 : self.is_sync = is_sync != 0;
52 36807 : }
53 0 : _ => unreachable!(),
54 : }
55 75923 : }
56 : }
57 :
58 : /// Global state of the simulation, derived from the simulation logs.
59 : #[derive(Debug, Default)]
60 : struct GlobalState {
61 : nodes: Vec<NodeInfo>,
62 : commit_lsn: u64,
63 : write_lsn: u64,
64 : max_write_lsn: u64,
65 :
66 : written_wal: u64,
67 : written_records: u64,
68 : }
69 :
70 : impl GlobalState {
71 2001 : fn new() -> Self {
72 2001 : Default::default()
73 2001 : }
74 :
75 146253 : fn get(&mut self, id: u32) -> &mut NodeInfo {
76 146253 : let id = id as usize;
77 146253 : if id >= self.nodes.len() {
78 42807 : self.nodes.resize(id + 1, NodeInfo::default());
79 103446 : }
80 146253 : &mut self.nodes[id]
81 146253 : }
82 : }
83 :
84 : /// Try to find inconsistencies in the simulation log.
85 2001 : pub fn validate_events(events: Vec<SimEvent>) {
86 2001 : const INITDB_LSN: u64 = 21623024;
87 2001 :
88 2001 : let hook = std::panic::take_hook();
89 : scopeguard::defer_on_success! {
90 : std::panic::set_hook(hook);
91 : };
92 :
93 2001 : let mut state = GlobalState::new();
94 2001 : state.max_write_lsn = INITDB_LSN;
95 :
96 113089 : for event in events {
97 111088 : debug!("{:?}", event);
98 :
99 111088 : let node = state.get(event.node);
100 111088 : if event.data.starts_with("started;") {
101 75923 : node.started(&event.data);
102 75923 : continue;
103 35165 : }
104 35165 : assert!(node.kind != NodeKind::Unknown);
105 :
106 : // drop reference to unlock state
107 35165 : let mut node = node.clone();
108 35165 :
109 35165 : let mut parts = event.data.split(';');
110 35165 : match node.kind {
111 29551 : NodeKind::Safekeeper => match parts.next().unwrap() {
112 29551 : "tli_loaded" => {
113 29551 : let flush_lsn: u64 = parts.next().unwrap().parse().unwrap();
114 29551 : let commit_lsn: u64 = parts.next().unwrap().parse().unwrap();
115 29551 : node.flush_lsn = flush_lsn;
116 29551 : node.commit_lsn = commit_lsn;
117 29551 : }
118 0 : _ => unreachable!(),
119 : },
120 : NodeKind::WalProposer => {
121 5614 : match parts.next().unwrap() {
122 5614 : "prop_elected" => {
123 2973 : let prop_lsn: u64 = parts.next().unwrap().parse().unwrap();
124 2973 : let prop_term: u64 = parts.next().unwrap().parse().unwrap();
125 2973 : let prev_lsn: u64 = parts.next().unwrap().parse().unwrap();
126 2973 : let prev_term: u64 = parts.next().unwrap().parse().unwrap();
127 2973 :
128 2973 : assert!(prop_lsn >= prev_lsn);
129 2973 : assert!(prop_term >= prev_term);
130 :
131 2973 : assert!(prop_lsn >= state.commit_lsn);
132 :
133 2973 : if prop_lsn > state.write_lsn {
134 206 : assert!(prop_lsn <= state.max_write_lsn);
135 206 : debug!(
136 0 : "moving write_lsn up from {} to {}",
137 : state.write_lsn, prop_lsn
138 : );
139 206 : state.write_lsn = prop_lsn;
140 2767 : }
141 2973 : if prop_lsn < state.write_lsn {
142 506 : debug!(
143 0 : "moving write_lsn down from {} to {}",
144 : state.write_lsn, prop_lsn
145 : );
146 506 : state.write_lsn = prop_lsn;
147 2467 : }
148 :
149 2973 : node.epoch_lsn = prop_lsn;
150 2973 : node.term = prop_term;
151 : }
152 2641 : "write_wal" => {
153 1365 : assert!(!node.is_sync);
154 1365 : let start_lsn: u64 = parts.next().unwrap().parse().unwrap();
155 1365 : let end_lsn: u64 = parts.next().unwrap().parse().unwrap();
156 1365 : let cnt: u64 = parts.next().unwrap().parse().unwrap();
157 1365 :
158 1365 : let size = end_lsn - start_lsn;
159 1365 : state.written_wal += size;
160 1365 : state.written_records += cnt;
161 1365 :
162 1365 : // TODO: If we allow writing WAL before winning the election
163 1365 :
164 1365 : assert!(start_lsn >= state.commit_lsn);
165 1365 : assert!(end_lsn >= start_lsn);
166 : // assert!(start_lsn == state.write_lsn);
167 1365 : state.write_lsn = end_lsn;
168 1365 :
169 1365 : if end_lsn > state.max_write_lsn {
170 1123 : state.max_write_lsn = end_lsn;
171 1123 : }
172 : }
173 1276 : "commit_lsn" => {
174 1276 : let lsn: u64 = parts.next().unwrap().parse().unwrap();
175 1276 : assert!(lsn >= state.commit_lsn);
176 1276 : state.commit_lsn = lsn;
177 : }
178 0 : _ => unreachable!(),
179 : }
180 : }
181 0 : _ => unreachable!(),
182 : }
183 :
184 : // update the node in the state struct
185 35165 : *state.get(event.node) = node;
186 : }
187 2001 : }
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