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https://github.com/Kpa-clawbot/meshcore-analyzer.git
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perf(store): count subpaths per request instead of indexing every run (#2182)
## Problem `spTxIndex` kept every 2–8 hop run of every stored path as a map key, with one transmission pointer per occurrence. On a busy regional network's 7-day window (59k transmissions) that's about 0.9–1.07 M keys and 130–160 MB of live heap, roughly a quarter of the store. It was also rebuilt at the end of every startup, which is when memory peaks. Two smaller issues came with it: - Eviction never decremented `spTotalPaths`, so the percentages were divided by paths that were no longer stored. - Route Patterns took 1.2–3.6 s uncached, because the fast path still split, resolved and re-joined about a million raw keys per request. ## Change - **Count on request.** Subpaths are counted when the analytics are asked for, from the stored paths. Results stay cached for `rfCacheTTL`, as before. - **Pointer-free tallies.** `tallyNamedSubpaths` counts runs in one pointer-free `map[uint64]subpathTally`, keyed by a `maphash` of the resolved name built in a reused buffer. The GC doesn't scan the map, and counting allocates nothing but the map. - **Names only for the top entries.** Each tally records the first transmission and offset where its run appeared, so names and raw hops are built only for each group's top entries. `topSubpathTallies` picks those with a `container/heap` min-heap of `limit` entries instead of sorting every name, and the existing `rankSubpaths` formats the response, so no new response maps are added. - **Hash collisions.** If two names shared a hash their counts would merge; the odds are about 1 in 10⁷ for a few million names. - **Subpath detail.** `GetSubpathDetail` finds the run with `txsWithSubpath`, a scan of the stored paths. - **Counts unchanged:** runs of 2–8 hops, counted once per occurrence, case-folded. The tests pin this. - **Totals.** `spTotalPaths` stays, and eviction now decrements it. - **Memory estimate.** The O(path²) subpath term is dropped from the estimate. ## Perf justification (AGENTS.md rule 0) - **Complexity.** A cold Route Patterns request is O(Σ runs), about 1.5 M for this window: one pass over the stored paths, with one map lookup per run against a reused buffer. Ranking is O(tallies · log limit). Results are cached for `rfCacheTTL`, so this runs at most once per TTL per group set. - **Subpath detail** is O(stored hops), one pass with no allocation per packet. It's an on-click endpoint, not a hot path. - **Ingest and eviction** no longer touch a subpath index at all. Removal used to be a linear search of every key's transmission list. **Measured on a copy of that window**, upstream master vs this branch, same queries: | | master | this PR | |---|---|---| | peak RSS (`GOMEMLIMIT=750MiB`) | 948 MB | 767 MB | | in-use heap after load (750MiB) | 592 MB | 456 MB | | `/api/analytics/subpaths` cold (750MiB) | 3.56 s | 0.64 s | | `/api/analytics/subpaths-bulk` cold (750MiB) | 3.33 s | 0.70 s | | `/api/analytics/subpaths` cold (1GiB) | 1.18 s | 0.61 s | | `/api/analytics/subpath-detail` | 0.6 ms | 8 ms | | cached responses | 0.6 ms | 0.5 ms | At 750 MiB, master's request time is mostly GC pressure from the index. On the production-shaped fixture that `subpath_index_memory_test.go` builds (41k transmissions): | | master | this PR | |---|---|---| | retained by the store for subpaths | 197 MB | 0 MB | | allocated per bulk request | 336 MB | 111 MB | This has also run on a staging instance with live MQTT ingest for about nine hours, with Route Patterns answering in about 1 s. ## Tests - `subpaths_on_demand_test.go`: - per-occurrence, case-folded counts; - the 8-hop cap; - bulk matches single; - detail counts, including repeats, case and the length limits; - eviction drops evicted paths from the totals. - `TestSubpathIndexRetainedHeap`: the bound is now 5 MB (it was 225 MB). - `TestSubpathRequestAllocations`: 150 MB per request. - Each change has its red commit first, failing on assertions. - Tests that reached into `spTxIndex` now assert through `txsWithSubpath` and the public counts. - `cd cmd/server && go test ./...` passes. - SonarQube: quality gate passed, no issues on added lines. **Overlap with #2181:** both edit the same memory-estimate comment block in `store.go`. Whichever lands second needs a trivial rebase there; there's no code dependency. Backend only: no UI, API shape or config change. 🤖 Generated with [Claude Code](https://claude.com/claude-code) https://claude.ai/code/session_01KaR4xu8gVykQBkH8yG8m6H --------- Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
Alex B
co-authored by
Claude Opus 5.5
Claude Opus 5.5
parent
ca62790c81
commit
8d39a9d465
@@ -27,7 +27,6 @@ func newChannelTestStore(packets []*StoreTx) *PacketStore {
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chanCache: make(map[string]*cachedResult),
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distCache: make(map[string]*cachedResult),
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subpathCache: make(map[string]*cachedResult),
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spTxIndex: make(map[string][]*StoreTx),
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advertPubkeys: make(map[string]int),
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clockSkew: NewClockSkewEngine(),
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}
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@@ -489,7 +489,6 @@ func (s *PacketStore) LoadChunked(chunkSize int) error {
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sort.SliceStable(s.packets, func(i, j int) bool {
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return s.packets[i].FirstSeen < s.packets[j].FirstSeen
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})
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s.buildSubpathIndex()
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s.buildPathHopIndex()
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s.buildDistanceIndex()
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if s.hotStartupHours > 0 {
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@@ -2331,14 +2331,6 @@ func TestSubpathPrecomputedIndex(t *testing.T) {
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t.Fatal("indexes never became ready")
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}
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// After Load(), the precomputed index must be populated.
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if len(store.spTxIndex) == 0 {
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t.Fatal("expected spTxIndex to be populated after Load()")
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}
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if store.spTotalPaths == 0 {
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t.Fatal("expected spTotalPaths > 0 after Load()")
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}
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// The rich test DB has paths ["aa","bb"], ["aabb","ccdd"], and
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// ["eeff","0011","2233"]. That yields 5 unique raw subpaths.
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expectedRaw := map[string]int{
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@@ -2349,16 +2341,10 @@ func TestSubpathPrecomputedIndex(t *testing.T) {
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"eeff,0011,2233": 1,
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}
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for key, want := range expectedRaw {
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txs, ok := store.spTxIndex[key]
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if !ok {
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t.Errorf("expected spTxIndex[%q] to exist", key)
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} else if got := len(txs); got != want {
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t.Errorf("len(spTxIndex[%q]) = %d, want %d", key, got, want)
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if got := len(store.txsWithSubpath(strings.Split(key, ","))); got != want {
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t.Errorf("txsWithSubpath(%q) = %d, want %d", key, got, want)
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}
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}
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if store.spTotalPaths != 3 {
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t.Errorf("spTotalPaths = %d, want 3", store.spTotalPaths)
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}
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// Fast-path (no region) and slow-path (with region) must return the
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// same shape.
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@@ -2373,9 +2359,9 @@ func TestSubpathPrecomputedIndex(t *testing.T) {
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}
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}
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// Verify fast path totalPaths matches index.
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if tp, ok := fast["totalPaths"].(int); ok && tp != store.spTotalPaths {
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t.Errorf("fast totalPaths=%d, spTotalPaths=%d", tp, store.spTotalPaths)
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// Three stored paths have two or more hops.
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if tp, _ := fast["totalPaths"].(int); tp != 3 {
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t.Errorf("fast totalPaths = %d, want 3", tp)
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}
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}
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@@ -2389,20 +2375,7 @@ func TestSubpathTxIndexPopulated(t *testing.T) {
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t.Fatal("indexes never became ready")
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}
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// spTxIndex must be populated after Load()
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if len(store.spTxIndex) == 0 {
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t.Fatal("expected spTxIndex to be populated after Load()")
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}
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// len(spTxIndex[key]) is the subpath's count, so no key may be kept
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// with an empty transaction list.
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for key, txs := range store.spTxIndex {
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if len(txs) == 0 {
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t.Errorf("spTxIndex[%q] is empty; empty keys must be deleted", key)
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}
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}
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// GetSubpathDetail should return correct match count via indexed lookup
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// GetSubpathDetail should return the correct match count
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detail := store.GetSubpathDetail([]string{"eeff", "0011"})
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if detail == nil {
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t.Fatal("expected non-nil detail for existing subpath")
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@@ -19,7 +19,6 @@ func makeTestStore(count int, startTime time.Time, intervalMin int) *PacketStore
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byNode: make(map[string][]*StoreTx),
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nodeHashes: make(map[string]map[string]bool),
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byPayloadType: make(map[int][]*StoreTx),
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spTxIndex: make(map[string][]*StoreTx),
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distHops: make([]distHopRecord, 0),
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distPaths: make([]distPathRecord, 0),
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rfCache: make(map[string]*cachedResult),
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@@ -83,9 +82,6 @@ func makeTestStore(count int, startTime time.Time, intervalMin int) *PacketStore
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store.distHops = append(store.distHops, distHopRecord{tx: tx, Hash: hash})
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store.distPaths = append(store.distPaths, distPathRecord{tx: tx, Hash: hash})
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// Subpath index
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addTxToSubpathIndex(store.spTxIndex, tx)
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// Track bytes for self-accounting
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store.trackedBytes += rechargeTx(tx)
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for _, obs := range tx.Observations {
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@@ -261,7 +257,6 @@ func TestEvictStale_CleansResolvedPathNodeIndexes(t *testing.T) {
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byNode: make(map[string][]*StoreTx),
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nodeHashes: make(map[string]map[string]bool),
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byPayloadType: make(map[int][]*StoreTx),
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spTxIndex: make(map[string][]*StoreTx),
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distHops: make([]distHopRecord, 0),
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distPaths: make([]distPathRecord, 0),
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rfCache: make(map[string]*cachedResult),
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@@ -565,14 +560,12 @@ func TestEstimateStoreTxBytes(t *testing.T) {
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PathJSON: `["aa","bb"]`,
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}
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est := estimateStoreTxBytes(tx)
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// Manual calculation: base + string lengths + index entries + perTxMaps + path hops + subpaths
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// Manual calculation: base + string lengths + index entries + perTxMaps + path hops
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// (subpaths are counted per request, so they cost the store nothing)
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hops := int64(len(txGetParsedPath(tx)))
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manualCalc := int64(storeTxBaseBytes) + int64(len(tx.RawHex)+len(tx.Hash)+len(tx.DecodedJSON)+len(tx.PathJSON)) + int64(numIndexesPerTx*indexEntryBytes)
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manualCalc += int64(decodedCacheFactor * len(tx.DecodedJSON))
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manualCalc += hops * perPathHopBytes
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if hops > 1 {
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manualCalc += (hops * (hops - 1) / 2) * perSubpathEntryBytes
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}
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if est != manualCalc {
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t.Fatalf("estimateStoreTxBytes = %d, want %d (manual calc)", est, manualCalc)
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}
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@@ -10,14 +10,16 @@
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// - subpathReady / pathHopReady are atomic.Bool flags written exactly
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// once by the background builder (false → true) and never reset
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// thereafter. Handlers read them via SubpathIndexReady() /
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// PathHopIndexReady() before touching s.spTxIndex /
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// PathHopIndexReady() before counting subpaths / reading
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// s.byPathHop. While a flag is false, the handler responds 503 +
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// Retry-After: 5.
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// Retry-After: 5. Subpaths are counted per request from s.packets,
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// so subpathReady builds nothing: it holds subpath requests until the
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// startup load has filled the store (the hot window, then again after
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// the background fill), so an empty store is never counted and cached.
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//
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// - The builder itself acquires s.mu.Lock() and calls the existing
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// buildSubpathIndex() / buildPathHopIndex() methods. Those methods
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// replace s.spTxIndex / s.byPathHop with freshly-
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// allocated maps under the write lock. Visibility of the populated
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// - The path-hop builder acquires s.mu.Lock() and calls
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// buildPathHopIndex(), which replaces s.byPathHop with a freshly
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// allocated map under the write lock. Visibility of the populated
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// maps to handlers that see Ready()==true is guaranteed by Go's
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// sync/atomic acquire-release semantics (formalized in Go 1.19):
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// the atomic.Store(true) happens-after the s.mu.Unlock() that
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@@ -30,7 +32,7 @@
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//
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// - Ingest-side incremental updates in StoreNewTransmissions /
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// pruning / hash-collision paths continue to write
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// s.spTxIndex / s.byPathHop directly under s.mu.Lock(). Because
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// s.byPathHop directly under s.mu.Lock(). Because
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// the builder also runs under s.mu.Lock() and the builder
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// overwrites whatever is there, the brief window between Load()
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// returning and the goroutine acquiring s.mu means any
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@@ -89,9 +91,10 @@ func writeIndexLoading503(w http.ResponseWriter) {
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_, _ = w.Write([]byte(`{"error":"index loading","retryAfter":5}`))
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}
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// SubpathIndexReady reports whether the subpath index build kicked off
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// by Load() has completed (#1008). Until this returns true, callers
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// must NOT read s.spTxIndex.
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// SubpathIndexReady reports whether the startup load has filled the store
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// far enough to count subpaths (#1008). Subpaths are counted per request,
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// so nothing is built; the gate keeps an empty store from being counted
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// and the result cached.
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func (s *PacketStore) SubpathIndexReady() bool {
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return s.subpathReady.Load()
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}
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@@ -148,38 +151,28 @@ func (s *PacketStore) maybeCloseIndexReadyCh() {
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}
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// startBackgroundIndexBuilds is called from Load() after s.loaded=true
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// to populate the subpath + path-hop indexes off the critical path
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// (#1008). It returns immediately; the work runs in two background
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// goroutines (one per index — see review m7) that each acquire
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// s.mu.Lock() independently, install their map, then set the
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// corresponding atomic ready flag.
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// to build the path-hop index off the critical path (#1008). It returns
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// immediately; a background goroutine acquires s.mu.Lock() (so it runs
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// once Load has released it), installs the map, then sets the ready
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// flags. Subpaths are counted per request and need no build of their own.
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//
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// At Cascadia scale (~5M observations) this previously blocked HTTP
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// readiness ~60s inside Load() under s.mu. Running the two builds in
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// parallel halves the pathHop-not-ready window since the two builders
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// are independent of each other.
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// At Cascadia scale (~5M observations) building under s.mu inside Load()
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// blocked HTTP readiness ~60s.
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func (s *PacketStore) startBackgroundIndexBuilds() {
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go func() {
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t0 := time.Now()
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s.mu.Lock()
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s.buildSubpathIndex()
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s.mu.Unlock()
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// Atomic.Store happens-after s.mu.Unlock; handlers that
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// observe Ready()==true synchronize-with this store.
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s.subpathReady.Store(true)
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s.maybeCloseIndexReadyCh()
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log.Printf("[startup] index build complete: subpath (%s)",
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time.Since(t0).Round(time.Millisecond))
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}()
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go func() {
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t1 := time.Now()
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s.mu.Lock()
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s.buildPathHopIndex()
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s.mu.Unlock()
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// Subpaths are counted per request, so they need no build: once
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// this goroutine holds s.mu, Load has released it and the store is
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// full. Atomic.Store happens-after s.mu.Unlock; handlers that
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// observe Ready()==true synchronize-with these stores.
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s.subpathReady.Store(true)
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s.pathHopReady.Store(true)
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s.maybeCloseIndexReadyCh()
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log.Printf("[startup] index build complete: pathHop (%s)",
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time.Since(t1).Round(time.Millisecond))
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log.Printf("[startup] index build complete: pathHop (%s); subpaths ready",
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time.Since(t0).Round(time.Millisecond))
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}()
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}
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@@ -197,7 +190,7 @@ func (s *PacketStore) markIndexesReadySync() {
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// WaitIndexesReady blocks until both background indexes built by
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// startBackgroundIndexBuilds() report ready, or the deadline expires.
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// Returns true if both flipped in time. Intended for tests that read
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// s.spTxIndex / s.byPathHop directly after Load(); production
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// s.byPathHop directly after Load(); production
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// code paths gate via SubpathIndexReady() / PathHopIndexReady() and
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// respond 503 + Retry-After to clients instead of blocking.
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//
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@@ -35,7 +35,6 @@ func ngTestStore(nodes []nodeInfo, packets []*StoreTx) *PacketStore {
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chanCache: make(map[string]*cachedResult),
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distCache: make(map[string]*cachedResult),
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subpathCache: make(map[string]*cachedResult),
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spTxIndex: make(map[string][]*StoreTx),
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}
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ps.nodeCache = nodes
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ps.nodePM = buildPrefixMap(nodes)
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@@ -152,7 +152,6 @@ func BenchmarkPathHopEviction1908(b *testing.B) {
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store := &PacketStore{
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packets: make([]*StoreTx, count),
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byPathHop: make(map[string][]*StoreTx, len(pubkeys)+256),
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spTxIndex: make(map[string][]*StoreTx),
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retentionHours: 1,
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}
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hopsSeen := make(map[string]bool, hops*2)
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@@ -28,7 +28,6 @@ func newRelayAirtimeShareTestStore(packets []*StoreTx) *PacketStore {
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chanCache: make(map[string]*cachedResult),
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distCache: make(map[string]*cachedResult),
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subpathCache: make(map[string]*cachedResult),
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spTxIndex: make(map[string][]*StoreTx),
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advertPubkeys: make(map[string]int),
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}
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ps.useResolvedPathIndex = true
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@@ -18,7 +18,6 @@ func relaySnapshotStore1908(count, nodes, expired int) *PacketStore {
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store := &PacketStore{
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packets: make([]*StoreTx, count),
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byPathHop: make(map[string][]*StoreTx, nodes+256),
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spTxIndex: make(map[string][]*StoreTx),
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retentionHours: 1,
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}
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pt := 5
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@@ -288,7 +288,6 @@ func TestEviction_ByNodeCleanup_OnDemandSQL(t *testing.T) {
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byNode: make(map[string][]*StoreTx),
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nodeHashes: make(map[string]map[string]bool),
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byPayloadType: make(map[int][]*StoreTx),
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spTxIndex: make(map[string][]*StoreTx),
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distHops: make([]distHopRecord, 0),
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distPaths: make([]distPathRecord, 0),
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rfCache: make(map[string]*cachedResult),
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@@ -363,7 +362,6 @@ func TestRunEviction_NoLockDuringSQLFetch(t *testing.T) {
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nodeHashes: make(map[string]map[string]bool),
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byPayloadType: make(map[int][]*StoreTx),
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byPathHop: make(map[string][]*StoreTx),
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spTxIndex: make(map[string][]*StoreTx),
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distHops: make([]distHopRecord, 0),
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distPaths: make([]distPathRecord, 0),
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rfCache: make(map[string]*cachedResult),
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@@ -1152,7 +1150,6 @@ func TestResolvedPubkeyIndex_BoundedByEviction(t *testing.T) {
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nodeHashes: make(map[string]map[string]bool),
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byPayloadType: make(map[int][]*StoreTx),
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byPathHop: make(map[string][]*StoreTx),
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spTxIndex: make(map[string][]*StoreTx),
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distHops: make([]distHopRecord, 0),
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distPaths: make([]distPathRecord, 0),
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rfCache: make(map[string]*cachedResult),
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@@ -1277,7 +1274,6 @@ func TestRunEviction_TriggersCompaction(t *testing.T) {
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nodeHashes: make(map[string]map[string]bool),
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byPayloadType: make(map[int][]*StoreTx),
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byPathHop: make(map[string][]*StoreTx),
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spTxIndex: make(map[string][]*StoreTx),
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distHops: make([]distHopRecord, 0),
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distPaths: make([]distPathRecord, 0),
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rfCache: make(map[string]*cachedResult),
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@@ -1364,7 +1360,6 @@ func TestResolvedPubkeyIndex_MemoryStableThroughEvictionCycles(t *testing.T) {
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nodeHashes: make(map[string]map[string]bool),
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byPayloadType: make(map[int][]*StoreTx),
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byPathHop: make(map[string][]*StoreTx),
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spTxIndex: make(map[string][]*StoreTx),
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distHops: make([]distHopRecord, 0),
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distPaths: make([]distPathRecord, 0),
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rfCache: make(map[string]*cachedResult),
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+182
-181
@@ -1,10 +1,12 @@
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package main
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import (
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||||
"container/heap"
|
||||
"crypto/sha256"
|
||||
"database/sql"
|
||||
"encoding/json"
|
||||
"fmt"
|
||||
"hash/maphash"
|
||||
"log"
|
||||
"math"
|
||||
"runtime"
|
||||
@@ -293,19 +295,17 @@ type PacketStore struct {
|
||||
// Per-store dedupe set for one-shot schema-degradation warnings. Field
|
||||
// (not package-level) so each test gets a fresh state — see #1199 item 5.
|
||||
schemaDegradationLogged sync.Map
|
||||
// Precomputed subpath index: raw comma-joined hops → occurrence count.
|
||||
// Built during Load(), incrementally updated on ingest. Avoids full
|
||||
// packet iteration at query time (O(unique_subpaths) vs O(total_packets)).
|
||||
// "hop1,hop2" → transmissions containing this subpath, one entry per
|
||||
// occurrence. The subpath's count is len(spTxIndex[key]); a separate
|
||||
// key → count map used to hold the same 1M+ keys a second time.
|
||||
spTxIndex map[string][]*StoreTx
|
||||
spTotalPaths int // transmissions with paths >= 2 hops
|
||||
// Background-build ready gates for spTxIndex and byPathHop
|
||||
// (#1008). Flipped from false→true exactly once by the goroutine
|
||||
// kicked off in Load() (or synchronously by the background chunk
|
||||
// loader). Handlers gate reads via SubpathIndexReady() /
|
||||
// PathHopIndexReady(); while false, they respond 503 + Retry-After.
|
||||
// Subpaths are counted per request from the stored paths (see
|
||||
// topNamedSubpaths); results are cached for rfCacheTTL. A key →
|
||||
// transmissions index of every 2-8 hop run held 1M+ keys and ~130MB
|
||||
// for a week of a busy regional network.
|
||||
//
|
||||
// Ready gates (#1008), flipped false→true once by the goroutine kicked
|
||||
// off in Load() or synchronously by the chunk loader. subpathReady says
|
||||
// the startup load has filled the store, so subpath analytics do not
|
||||
// count, and cache, an empty one; pathHopReady says byPathHop is
|
||||
// built. Handlers gate on SubpathIndexReady() / PathHopIndexReady();
|
||||
// while false, they respond 503 + Retry-After.
|
||||
subpathReady atomic.Bool
|
||||
pathHopReady atomic.Bool
|
||||
// indexReadyChan is closed exactly once when BOTH subpathReady
|
||||
@@ -743,7 +743,6 @@ func NewPacketStore(db *DB, cfg *PacketStoreConfig, cacheTTLs ...map[string]inte
|
||||
rfCacheTTL: 60 * time.Second,
|
||||
collisionCacheTTL: 3600 * time.Second,
|
||||
invCooldown: 300 * time.Second,
|
||||
spTxIndex: make(map[string][]*StoreTx, 4096),
|
||||
advertPubkeys: make(map[string]int),
|
||||
pathHopResolved: make(map[*StoreTx][]string),
|
||||
pathHopKeys: make(map[string]string),
|
||||
@@ -1080,13 +1079,6 @@ func (s *PacketStore) Load() error {
|
||||
s.indexByNode(tx)
|
||||
}
|
||||
|
||||
// Build precomputed subpath index for O(1) analytics queries
|
||||
// — DEFERRED to a background goroutine (#1008). Same rationale
|
||||
// as the distance index (#1011): synchronous build under s.mu
|
||||
// blocks HTTP readiness ~60s at Cascadia scale. The goroutine is
|
||||
// started AFTER s.loaded = true below.
|
||||
// s.buildSubpathIndex()
|
||||
|
||||
// Build path-hop index for O(1) node path lookups
|
||||
// — DEFERRED to a background goroutine (#1008).
|
||||
// s.buildPathHopIndex()
|
||||
@@ -1138,7 +1130,7 @@ func (s *PacketStore) Load() error {
|
||||
// The chunk is assumed to be older than the data already in the store, so
|
||||
// localPackets are prepended to s.packets.
|
||||
//
|
||||
// byPayloadType is updated here incrementally. byPathHop, spTxIndex and
|
||||
// byPayloadType is updated here incrementally. byPathHop and
|
||||
// distHops are NOT updated here — the caller (loadBackgroundChunks) rebuilds
|
||||
// those once after all chunks are merged.
|
||||
|
||||
@@ -1676,7 +1668,6 @@ func (s *PacketStore) loadBackgroundChunks() {
|
||||
|
||||
// Rebuild analytics indexes once after all chunks are merged.
|
||||
s.mu.Lock()
|
||||
s.buildSubpathIndex()
|
||||
s.buildPathHopIndex()
|
||||
// Distance index is now lazy (#1011) — built on first
|
||||
// /api/analytics/distance request, not at background-load
|
||||
@@ -1775,8 +1766,8 @@ func pickBestObservation(tx *StoreTx) {
|
||||
|
||||
// rechargeTx re-estimates tx and returns the change since it was last charged,
|
||||
// for the caller to add to trackedBytes. A tx is first charged when it is
|
||||
// created, before its observations are merged, so its path costs (byPathHop,
|
||||
// spTxIndex) are unknown then: call this again once pickBestObservation has
|
||||
// created, before its observations are merged, so its path costs (byPathHop)
|
||||
// are unknown then: call this again once pickBestObservation has
|
||||
// set the path. Eviction subtracts accountedBytes, so the running total stays
|
||||
// consistent however often the path changed in between.
|
||||
func rechargeTx(tx *StoreTx) int64 {
|
||||
@@ -3017,11 +3008,8 @@ func (s *PacketStore) IngestNewFromDB(sinceID, limit int) ([]map[string]interfac
|
||||
s.trackedBytes += rechargeTx(tx)
|
||||
}
|
||||
|
||||
// Incrementally update precomputed subpath index with new transmissions
|
||||
// Incrementally update the path-hop index with new transmissions.
|
||||
for _, tx := range broadcastTxs {
|
||||
if addTxToSubpathIndex(s.spTxIndex, tx) {
|
||||
s.spTotalPaths++
|
||||
}
|
||||
addTxToPathHopIndex(s.byPathHop, tx)
|
||||
}
|
||||
if len(broadcastTxs) > 0 {
|
||||
@@ -3405,17 +3393,8 @@ func (s *PacketStore) IngestNewObservations(sinceObsID, limit int) []map[string]
|
||||
pathHopMutated := false
|
||||
for txID, tx := range updatedTxs {
|
||||
if tx.PathJSON != oldPaths[txID] {
|
||||
// Path changed — remove old subpaths, add new ones.
|
||||
// Path changed — re-index its hops.
|
||||
oldHops := parsePathJSON(oldPaths[txID])
|
||||
if len(oldHops) >= 2 {
|
||||
// Temporarily set parsedPath to old hops for removal.
|
||||
saved, savedFlag := tx.parsedPath, tx.pathParsed
|
||||
tx.parsedPath, tx.pathParsed = oldHops, true
|
||||
if removeTxFromSubpathIndex(s.spTxIndex, tx) {
|
||||
s.spTotalPaths--
|
||||
}
|
||||
tx.parsedPath, tx.pathParsed = saved, savedFlag
|
||||
}
|
||||
// Remove old path-hop index entries using old hops.
|
||||
// Resolved pubkeys remain indexed independently of the best raw path.
|
||||
if len(oldHops) > 0 {
|
||||
@@ -3425,10 +3404,7 @@ func (s *PacketStore) IngestNewObservations(sinceObsID, limit int) []map[string]
|
||||
tx.parsedPath, tx.pathParsed = saved, savedFlag
|
||||
}
|
||||
// pickBestObservation already set pathParsed=false so
|
||||
// addTxToSubpathIndex will re-parse the new path.
|
||||
if addTxToSubpathIndex(s.spTxIndex, tx) {
|
||||
s.spTotalPaths++
|
||||
}
|
||||
// addTxToPathHopIndex re-parses the new path.
|
||||
addTxToPathHopIndex(s.byPathHop, tx)
|
||||
// #1164: coalesce — one invalidate after the loop, not per-tx.
|
||||
pathHopMutated = true
|
||||
@@ -4218,65 +4194,137 @@ func txGetParsedPath(tx *StoreTx) []string {
|
||||
return tx.parsedPath
|
||||
}
|
||||
|
||||
// addTxToSubpathIndex appends tx to txIdx under every raw subpath (lengths
|
||||
// 2–8) of its path, once per occurrence, so len(txIdx[key]) is the subpath's
|
||||
// count. Returns true if the tx contributed (path had ≥ 2 hops).
|
||||
func addTxToSubpathIndex(txIdx map[string][]*StoreTx, tx *StoreTx) bool {
|
||||
hops := txGetParsedPath(tx)
|
||||
if len(hops) < 2 {
|
||||
return false
|
||||
}
|
||||
maxL := min(8, len(hops))
|
||||
for l := 2; l <= maxL; l++ {
|
||||
for start := 0; start <= len(hops)-l; start++ {
|
||||
key := strings.ToLower(strings.Join(hops[start:start+l], ","))
|
||||
txIdx[key] = append(txIdx[key], tx)
|
||||
}
|
||||
}
|
||||
return true
|
||||
// subpathMaxLen is the longest run of hops counted as a subpath.
|
||||
const subpathMaxLen = 8
|
||||
|
||||
// subpathTally counts one named subpath while subpaths are counted. It
|
||||
// holds no pointers, so the counting map is not scanned by the GC: the run
|
||||
// it names is found again through the first transmission that had it.
|
||||
type subpathTally struct {
|
||||
count int32
|
||||
tx int32 // index in s.packets of the first transmission with the run
|
||||
start uint16 // the run's first hop in that transmission's path
|
||||
n uint16 // the run's length in hops
|
||||
}
|
||||
|
||||
// removeTxFromSubpathIndex is the inverse of addTxToSubpathIndex: it removes
|
||||
// one occurrence of tx per raw subpath of its path, and drops keys left
|
||||
// empty. Returns true if the tx had a path.
|
||||
func removeTxFromSubpathIndex(txIdx map[string][]*StoreTx, tx *StoreTx) bool {
|
||||
hops := txGetParsedPath(tx)
|
||||
if len(hops) < 2 {
|
||||
return false
|
||||
// topNamedSubpaths returns, per group, the top g.Limit subpaths of the
|
||||
// stored paths keyed by resolved name, for rankSubpaths to format, and the
|
||||
// number of paths with at least two hops. It counts
|
||||
// every run of 2 to subpathMaxLen hops, once per occurrence; a run counts in
|
||||
// every group whose length range holds it. Callers hold s.mu.RLock.
|
||||
//
|
||||
// Runs are tallied under a 64-bit hash of their resolved name, built in a
|
||||
// reused buffer, so counting allocates only the maps; names and raw hops are
|
||||
// built for the ranked entries alone. Two names sharing a hash would merge,
|
||||
// about a 1 in 10^7 chance for a few million names.
|
||||
func (s *PacketStore) topNamedSubpaths(groups []subpathGroup, resolveHop func(string) string) ([]map[string]*subpathAccum, int) {
|
||||
tallies, totalPaths := s.tallyNamedSubpaths(groups, resolveHop)
|
||||
perGroup := make([]map[string]*subpathAccum, len(groups))
|
||||
var named []string
|
||||
for i, g := range groups {
|
||||
top := topSubpathTallies(tallies, g, g.Limit)
|
||||
perGroup[i] = make(map[string]*subpathAccum, len(top))
|
||||
for _, t := range top {
|
||||
hops := txGetParsedPath(s.packets[t.tx])[t.start : t.start+t.n]
|
||||
named = named[:0]
|
||||
raw := make([]string, len(hops))
|
||||
for j, h := range hops {
|
||||
raw[j] = strings.ToLower(h)
|
||||
named = append(named, resolveHop(raw[j]))
|
||||
}
|
||||
perGroup[i][string(appendNamedSubpath(nil, named))] = &subpathAccum{count: int(t.count), raw: strings.Join(raw, ",")}
|
||||
}
|
||||
}
|
||||
maxL := min(8, len(hops))
|
||||
for l := 2; l <= maxL; l++ {
|
||||
for start := 0; start <= len(hops)-l; start++ {
|
||||
key := strings.ToLower(strings.Join(hops[start:start+l], ","))
|
||||
txs := txIdx[key]
|
||||
for i, t := range txs {
|
||||
if t == tx {
|
||||
txs = append(txs[:i], txs[i+1:]...)
|
||||
break
|
||||
return perGroup, totalPaths
|
||||
}
|
||||
|
||||
// tallyNamedSubpaths counts the runs of hops whose lengths any group asks
|
||||
// for, keyed by a hash of their resolved name (see topNamedSubpaths), and
|
||||
// returns the tallies with the number of paths of at least two hops. A name's
|
||||
// length is fixed, so one map serves every group.
|
||||
func (s *PacketStore) tallyNamedSubpaths(groups []subpathGroup, resolveHop func(string) string) (map[uint64]subpathTally, int) {
|
||||
seed := maphash.MakeSeed()
|
||||
minL, maxL := subpathMaxLen+1, 0
|
||||
for _, g := range groups {
|
||||
minL, maxL = min(minL, max(2, g.MinLen)), max(maxL, min(subpathMaxLen, g.MaxLen))
|
||||
}
|
||||
tallies := make(map[uint64]subpathTally)
|
||||
totalPaths := 0
|
||||
var named []string
|
||||
var key []byte
|
||||
for ti, tx := range s.packets {
|
||||
hops := txGetParsedPath(tx)
|
||||
if len(hops) < 2 {
|
||||
continue
|
||||
}
|
||||
totalPaths++
|
||||
named = named[:0]
|
||||
for _, h := range hops {
|
||||
named = append(named, resolveHop(strings.ToLower(h)))
|
||||
}
|
||||
for l := minL; l <= min(maxL, len(hops)); l++ {
|
||||
for start := 0; start+l <= len(hops); start++ {
|
||||
key = appendNamedSubpath(key[:0], named[start:start+l])
|
||||
h := maphash.Bytes(seed, key)
|
||||
t, ok := tallies[h]
|
||||
if !ok {
|
||||
t = subpathTally{tx: int32(ti), start: uint16(start), n: uint16(l)}
|
||||
}
|
||||
}
|
||||
if len(txs) == 0 {
|
||||
delete(txIdx, key)
|
||||
} else {
|
||||
txIdx[key] = txs
|
||||
t.count++
|
||||
tallies[h] = t
|
||||
}
|
||||
}
|
||||
}
|
||||
return true
|
||||
return tallies, totalPaths
|
||||
}
|
||||
|
||||
// buildSubpathIndex scans all packets and populates spTxIndex + spTotalPaths.
|
||||
// Must be called with s.mu held.
|
||||
func (s *PacketStore) buildSubpathIndex() {
|
||||
s.spTxIndex = make(map[string][]*StoreTx, 4096)
|
||||
s.spTotalPaths = 0
|
||||
for _, tx := range s.packets {
|
||||
if addTxToSubpathIndex(s.spTxIndex, tx) {
|
||||
s.spTotalPaths++
|
||||
// appendNamedSubpath appends the resolved hop names joined by " → ".
|
||||
func appendNamedSubpath(buf []byte, named []string) []byte {
|
||||
for i, n := range named {
|
||||
if i > 0 {
|
||||
buf = append(buf, " → "...)
|
||||
}
|
||||
buf = append(buf, n...)
|
||||
}
|
||||
return buf
|
||||
}
|
||||
|
||||
// topSubpathTallies returns the limit highest counts among the tallies in
|
||||
// g's length range, highest first, keeping a min-heap of limit entries
|
||||
// instead of sorting every tally.
|
||||
func topSubpathTallies(m map[uint64]subpathTally, g subpathGroup, limit int) []subpathTally {
|
||||
if limit <= 0 {
|
||||
return nil
|
||||
}
|
||||
h := make(tallyHeap, 0, limit)
|
||||
for _, t := range m {
|
||||
if int(t.n) < g.MinLen || int(t.n) > g.MaxLen {
|
||||
continue
|
||||
}
|
||||
switch {
|
||||
case len(h) < limit:
|
||||
heap.Push(&h, t)
|
||||
case t.count > h[0].count:
|
||||
h[0] = t
|
||||
heap.Fix(&h, 0)
|
||||
}
|
||||
}
|
||||
log.Printf("[store] Built subpath index: %d unique raw subpaths from %d paths",
|
||||
len(s.spTxIndex), s.spTotalPaths)
|
||||
sort.Slice(h, func(i, j int) bool { return h[i].count > h[j].count })
|
||||
return h
|
||||
}
|
||||
|
||||
// tallyHeap is a min-heap of tallies by count (container/heap).
|
||||
type tallyHeap []subpathTally
|
||||
|
||||
func (h tallyHeap) Len() int { return len(h) }
|
||||
func (h tallyHeap) Less(i, j int) bool { return h[i].count < h[j].count }
|
||||
func (h tallyHeap) Swap(i, j int) { h[i], h[j] = h[j], h[i] }
|
||||
func (h *tallyHeap) Push(x any) { *h = append(*h, x.(subpathTally)) }
|
||||
func (h *tallyHeap) Pop() any {
|
||||
old := *h
|
||||
t := old[len(old)-1]
|
||||
*h = old[:len(old)-1]
|
||||
return t
|
||||
}
|
||||
|
||||
// buildPathHopIndex rebuilds byPathHop: raw wire hops from every packet's
|
||||
@@ -4756,9 +4804,11 @@ func (s *PacketStore) buildDistanceIndex() {
|
||||
// usage and independent of GC state.
|
||||
//
|
||||
// Issue #743: Previous estimates missed major per-packet allocations:
|
||||
// - spTxIndex: O(path²) entries per tx (50-150MB at scale)
|
||||
// - Per-tx dedup maps (now only past obsIndexThreshold observations)
|
||||
// - byPathHop index entries (20-40MB at scale)
|
||||
// - the subpath index: O(path²) entries per tx (since removed; subpaths
|
||||
// are counted per request)
|
||||
// - Per-tx dedup maps (now only past obsIndexThreshold observations)
|
||||
// - byPathHop index entries (20-40MB at scale)
|
||||
//
|
||||
// Note: ResolvedPath per-obs overhead eliminated by #800 refactor.
|
||||
const (
|
||||
storeTxBaseBytes = 384 // StoreTx struct fields + map headers + sync.Once + string headers
|
||||
@@ -4771,9 +4821,6 @@ const (
|
||||
// Per path hop: byPathHop index entry (pointer + map bucket)
|
||||
perPathHopBytes = 50
|
||||
|
||||
// Per subpath entry in spTxIndex: string key + slice append + pointer
|
||||
perSubpathEntryBytes = 40
|
||||
|
||||
// ParsedDecoded caches json.Unmarshal of DecodedJSON as a
|
||||
// map[string]interface{}: measured at about 4x the JSON length on a
|
||||
// production heap profile. Analytics touch every tx, so it is charged
|
||||
@@ -4782,7 +4829,7 @@ const (
|
||||
)
|
||||
|
||||
// estimateStoreTxBytes returns the estimated memory cost of a StoreTx (excluding observations).
|
||||
// Includes byPathHop entries and spTxIndex subpath entries.
|
||||
// Includes byPathHop entries.
|
||||
func estimateStoreTxBytes(tx *StoreTx) int64 {
|
||||
base := int64(storeTxBaseBytes)
|
||||
base += int64(len(tx.RawHex) + len(tx.Hash) + len(tx.DecodedJSON) + len(tx.PathJSON))
|
||||
@@ -4793,12 +4840,6 @@ func estimateStoreTxBytes(tx *StoreTx) int64 {
|
||||
hops := int64(len(txGetParsedPath(tx)))
|
||||
base += hops * perPathHopBytes
|
||||
|
||||
// spTxIndex: O(path²) subpath combinations
|
||||
if hops > 1 {
|
||||
subpaths := hops * (hops - 1) / 2
|
||||
base += subpaths * perSubpathEntryBytes
|
||||
}
|
||||
|
||||
return base
|
||||
}
|
||||
|
||||
@@ -4812,7 +4853,6 @@ func estimateStoreTxBytesTypical(numObs int) int64 {
|
||||
base += decodedCacheFactor * 200
|
||||
hops := int64(3)
|
||||
base += hops * perPathHopBytes
|
||||
base += (hops * (hops - 1) / 2) * perSubpathEntryBytes
|
||||
// Add observation costs
|
||||
obsBase := int64(storeObsBaseBytes) + 30 + 30 + 60 + 25 // observer ID + name + path + timestamp
|
||||
obsBase += int64(numIndexesPerObs * indexEntryBytes)
|
||||
@@ -5100,9 +5140,6 @@ func (s *PacketStore) evictStaleInternal(rpBatch map[int][]string) int {
|
||||
|
||||
// Remove from resolved pubkey index
|
||||
s.removeFromResolvedPubkeyIndex(tx.ID)
|
||||
|
||||
// Remove from subpath index
|
||||
removeTxFromSubpathIndex(s.spTxIndex, tx)
|
||||
}
|
||||
// Sweep raw AND resolved hop keys once per batch (#1908). The hash-only
|
||||
// membership index cannot recover full pubkey strings. Reuse the evicted
|
||||
@@ -5361,7 +5398,7 @@ func hasUpperASCII(s string) bool {
|
||||
// loops that resolve hops outside any per-tx scope (subpath/topology
|
||||
// aggregations). Caller passes the slice of txs to consider; we union the
|
||||
// per-tx contexts with de-dup. Used by call sites that read from precomputed
|
||||
// indices (s.spTxIndex) or that resolve user-supplied hops.
|
||||
// indices or that resolve user-supplied hops.
|
||||
//
|
||||
// Result is order-independent in semantics; iteration order is deterministic
|
||||
// only modulo Go's map iteration (acceptable — the resolver's tier-2 averages
|
||||
@@ -10253,10 +10290,8 @@ func (s *PacketStore) GetNodeAnalytics(pubkey string, days int) (*NodeAnalyticsR
|
||||
// path. With a zero TimeWindow this is byte-equivalent to GetAnalyticsSubpaths.
|
||||
//
|
||||
// For non-zero windows we iterate the packet list and filter on
|
||||
// `tx.FirstSeen`. We deliberately do not consult the precomputed `spTxIndex`
|
||||
// (which has no per-tx timestamp), so the windowed path is O(N_tx · path²);
|
||||
// this matches the slow region-filtered path and keeps the fast unbounded
|
||||
// hot path untouched. Results are cached by (region|area|window) so repeated
|
||||
// `tx.FirstSeen`, so the windowed path is O(N_tx · path²), like the
|
||||
// region-filtered and unbounded paths. Results are cached by (region|area|window) so repeated
|
||||
// renders of the same window don't re-scan.
|
||||
func (s *PacketStore) GetAnalyticsSubpathsWithWindow(region string, minLen, maxLen, limit int, window TimeWindow) map[string]interface{} {
|
||||
if window.IsZero() {
|
||||
@@ -10398,7 +10433,7 @@ func (s *PacketStore) GetAnalyticsSubpathsBulkWithWindow(region string, groups [
|
||||
}
|
||||
|
||||
// GetAnalyticsSubpathsBulk returns multiple length-range buckets from a single
|
||||
// scan of the subpath index, avoiding repeated iterations.
|
||||
// scan of the stored paths, avoiding repeated iterations.
|
||||
func (s *PacketStore) GetAnalyticsSubpathsBulk(region string, groups []subpathGroup) []map[string]interface{} {
|
||||
// For region queries or when there are few groups, fall back to individual calls
|
||||
// which benefit from per-key caching.
|
||||
@@ -10435,7 +10470,7 @@ func (s *PacketStore) GetAnalyticsSubpathsBulk(region string, groups []subpathGr
|
||||
_, pm := s.getCachedNodesAndPM()
|
||||
// Aggregate hop-disambiguation context across all packets so the
|
||||
// resolver's tiers 1 and 2 light up even on this bulk-aggregate path
|
||||
// (the index iterates raw subpath strings, not per-tx). See #1197.
|
||||
// (hops are resolved once per request, not per tx). See #1197.
|
||||
contextPubkeys := buildAggregateHopContextPubkeys(s.packets, pm)
|
||||
hopCache := make(map[string]*nodeInfo)
|
||||
graph := s.graph.Load() // hoist out of resolver closure (PR #1208 carmack #1)
|
||||
@@ -10454,42 +10489,7 @@ func (s *PacketStore) GetAnalyticsSubpathsBulk(region string, groups []subpathGr
|
||||
return hop
|
||||
}
|
||||
|
||||
perGroup := make([]map[string]*subpathAccum, len(groups))
|
||||
for i := range groups {
|
||||
perGroup[i] = make(map[string]*subpathAccum)
|
||||
}
|
||||
|
||||
for rawKey, txs := range s.spTxIndex {
|
||||
count := len(txs)
|
||||
hops := strings.Split(rawKey, ",")
|
||||
hopLen := len(hops)
|
||||
|
||||
// Resolve hop names once, reuse across groups.
|
||||
var named []string
|
||||
var namedKey string
|
||||
resolved := false
|
||||
|
||||
for gi, g := range groups {
|
||||
if hopLen < g.MinLen || hopLen > g.MaxLen {
|
||||
continue
|
||||
}
|
||||
if !resolved {
|
||||
named = make([]string, hopLen)
|
||||
for i, h := range hops {
|
||||
named[i] = resolveHop(h)
|
||||
}
|
||||
namedKey = strings.Join(named, " → ")
|
||||
resolved = true
|
||||
}
|
||||
entry := perGroup[gi][namedKey]
|
||||
if entry == nil {
|
||||
entry = &subpathAccum{raw: rawKey}
|
||||
perGroup[gi][namedKey] = entry
|
||||
}
|
||||
entry.count += count
|
||||
}
|
||||
}
|
||||
totalPaths := s.spTotalPaths
|
||||
perGroup, totalPaths := s.topNamedSubpaths(groups, resolveHop)
|
||||
s.mu.RUnlock()
|
||||
|
||||
results := make([]map[string]interface{}, len(groups))
|
||||
@@ -10508,6 +10508,33 @@ func (s *PacketStore) GetAnalyticsSubpathsBulk(region string, groups []subpathGr
|
||||
return results
|
||||
}
|
||||
|
||||
// txsWithSubpath returns the stored transmissions whose path holds rawHops
|
||||
// as a contiguous run, compared case-insensitively, one entry per occurrence.
|
||||
// Runs shorter than 2 or longer than subpathMaxLen hops are not subpaths.
|
||||
// Callers hold s.mu.RLock.
|
||||
func (s *PacketStore) txsWithSubpath(rawHops []string) []*StoreTx {
|
||||
if len(rawHops) < 2 || len(rawHops) > subpathMaxLen {
|
||||
return nil
|
||||
}
|
||||
var out []*StoreTx
|
||||
for _, tx := range s.packets {
|
||||
hops := txGetParsedPath(tx)
|
||||
for start := 0; start+len(rawHops) <= len(hops); start++ {
|
||||
match := true
|
||||
for i, h := range rawHops {
|
||||
if !strings.EqualFold(hops[start+i], h) {
|
||||
match = false
|
||||
break
|
||||
}
|
||||
}
|
||||
if match {
|
||||
out = append(out, tx)
|
||||
}
|
||||
}
|
||||
}
|
||||
return out
|
||||
}
|
||||
|
||||
// subpathAccum holds a running count for a single named subpath.
|
||||
type subpathAccum struct {
|
||||
count int
|
||||
@@ -10520,7 +10547,7 @@ func (s *PacketStore) computeAnalyticsSubpaths(region string, minLen, maxLen, li
|
||||
|
||||
_, pm := s.getCachedNodesAndPM()
|
||||
// Aggregate hop-disambiguation context across all packets — bulk
|
||||
// aggregator over s.spTxIndex / per-tx fallback both need it. See #1197.
|
||||
// aggregator and per-tx fallback both need it. See #1197.
|
||||
contextPubkeys := buildAggregateHopContextPubkeys(s.packets, pm)
|
||||
hopCache := make(map[string]*nodeInfo)
|
||||
graph := s.graph.Load() // hoist out of resolver closure (PR #1208 carmack #1)
|
||||
@@ -10545,30 +10572,8 @@ func (s *PacketStore) computeAnalyticsSubpaths(region string, minLen, maxLen, li
|
||||
return s.computeSubpathsSlow(region, minLen, maxLen, limit, resolveHop)
|
||||
}
|
||||
|
||||
// Fast path: read from precomputed raw-hop subpath index.
|
||||
// Resolve raw hop prefixes to names and merge counts.
|
||||
namedCounts := make(map[string]*subpathAccum, len(s.spTxIndex))
|
||||
for rawKey, txs := range s.spTxIndex {
|
||||
count := len(txs)
|
||||
hops := strings.Split(rawKey, ",")
|
||||
hopLen := len(hops)
|
||||
if hopLen < minLen || hopLen > maxLen {
|
||||
continue
|
||||
}
|
||||
named := make([]string, hopLen)
|
||||
for i, h := range hops {
|
||||
named[i] = resolveHop(h)
|
||||
}
|
||||
namedKey := strings.Join(named, " → ")
|
||||
entry := namedCounts[namedKey]
|
||||
if entry == nil {
|
||||
entry = &subpathAccum{raw: rawKey}
|
||||
namedCounts[namedKey] = entry
|
||||
}
|
||||
entry.count += count
|
||||
}
|
||||
|
||||
return s.rankSubpaths(namedCounts, s.spTotalPaths, limit)
|
||||
top, totalPaths := s.topNamedSubpaths([]subpathGroup{{MinLen: minLen, MaxLen: maxLen, Limit: limit}}, resolveHop)
|
||||
return s.rankSubpaths(top[0], totalPaths, limit)
|
||||
}
|
||||
|
||||
// computeSubpathsSlow is the original O(N) packet-iteration path, used only
|
||||
@@ -10666,11 +10671,7 @@ func (s *PacketStore) GetSubpathDetail(rawHops []string) map[string]interface{}
|
||||
|
||||
_, pm := s.getCachedNodesAndPM()
|
||||
|
||||
// Build the subpath key the same way the index does (lowercase, comma-joined)
|
||||
spKey := strings.ToLower(strings.Join(rawHops, ","))
|
||||
|
||||
// Direct lookup instead of scanning all packets
|
||||
matchedTxs := s.spTxIndex[spKey]
|
||||
matchedTxs := s.txsWithSubpath(rawHops)
|
||||
|
||||
// Hop-disambiguation context: union over the matched txs that produced
|
||||
// this subpath. This is the right scope — those are the packets that
|
||||
|
||||
@@ -3,19 +3,17 @@ package main
|
||||
import (
|
||||
"encoding/json"
|
||||
"fmt"
|
||||
"io"
|
||||
"log"
|
||||
"math/rand"
|
||||
"os"
|
||||
"runtime"
|
||||
"testing"
|
||||
)
|
||||
|
||||
// The subpath index holds every contiguous run of 2-8 hops of every stored
|
||||
// transmission's path. On a production instance's 7-day window (41k
|
||||
// transmissions with 2+ hops) that is 1.2M distinct keys, 79% of them seen
|
||||
// once, and 3.07M entries; a heap profile put 186 MB of a 805 MB live heap in
|
||||
// addTxToSubpathIndexFull.
|
||||
// The subpath index used to hold every contiguous run of 2-8 hops of every
|
||||
// stored transmission's path: on a production instance's 7-day window (41k
|
||||
// transmissions with 2+ hops) 1.2M distinct keys, 79% of them seen once, and
|
||||
// 186 MB of an 805 MB live heap. Subpaths are now counted per request, and
|
||||
// TestSubpathRequestAllocations bounds what one request allocates over the
|
||||
// same shape of data.
|
||||
//
|
||||
// subpathFixture builds transmissions with that shape from synthetic data: path
|
||||
// lengths follow the production hop-count histogram, and hops are random walks
|
||||
@@ -76,13 +74,6 @@ func weightedHopCount(rng *rand.Rand, weights []int) int {
|
||||
return 2
|
||||
}
|
||||
|
||||
// buildSubpathIndexForTest builds the index the way Load does and returns it.
|
||||
func buildSubpathIndexForTest(txs []*StoreTx) *PacketStore {
|
||||
s := &PacketStore{packets: txs}
|
||||
s.buildSubpathIndex()
|
||||
return s
|
||||
}
|
||||
|
||||
// retainedHeapMB reports how much live heap build() keeps after a full GC.
|
||||
func retainedHeapMB(build func() interface{}) float64 {
|
||||
var before, after runtime.MemStats
|
||||
@@ -119,44 +110,37 @@ func TestSubpathFixtureShape(t *testing.T) {
|
||||
}
|
||||
}
|
||||
|
||||
// BenchmarkBuildSubpathIndex reports the live heap the index keeps for a
|
||||
// production-shaped 7-day window (41k transmissions with paths).
|
||||
//
|
||||
// go test -run '^$' -bench BenchmarkBuildSubpathIndex -count 10 ./cmd/server
|
||||
func BenchmarkBuildSubpathIndex(b *testing.B) {
|
||||
log.SetOutput(io.Discard)
|
||||
b.Cleanup(func() { log.SetOutput(os.Stderr) })
|
||||
txs := subpathFixture(41000, 1)
|
||||
for _, tx := range txs {
|
||||
txGetParsedPath(tx) // parse once, outside the measurement
|
||||
}
|
||||
b.ReportAllocs()
|
||||
b.ResetTimer()
|
||||
var mb float64
|
||||
for i := 0; i < b.N; i++ {
|
||||
mb = retainedHeapMB(func() interface{} { return buildSubpathIndexForTest(txs) })
|
||||
}
|
||||
b.ReportMetric(mb, "retained-MB")
|
||||
}
|
||||
|
||||
// TestSubpathIndexRetainedHeap bounds the live heap the subpath index keeps for
|
||||
// the production-shaped fixture. It kept 250 MB when a separate key → count
|
||||
// map duplicated every key of spTxIndex; with counts read as len(txs) it keeps
|
||||
// about 197 MB. The bound sits between the two.
|
||||
func TestSubpathIndexRetainedHeap(t *testing.T) {
|
||||
// TestSubpathRequestAllocations bounds what one analytics request allocates
|
||||
// to count the production-shaped fixture's subpaths. Counting with a map from
|
||||
// each named key string to a heap-allocated accumulator allocated about
|
||||
// 336 MB for its 1.5M keys: on a small instance that is a spike the size of
|
||||
// the whole store, every time the cache expires. Pointer-free tallies under
|
||||
// a hash of the name allocate about 110 MB, nearly all of it the one map's
|
||||
// growth.
|
||||
func TestSubpathRequestAllocations(t *testing.T) {
|
||||
if testing.Short() {
|
||||
t.Skip("builds a 1.5M-key index")
|
||||
t.Skip("counts 1.5M subpaths")
|
||||
}
|
||||
log.SetOutput(io.Discard)
|
||||
defer log.SetOutput(os.Stderr)
|
||||
txs := subpathFixture(41000, 1)
|
||||
for _, tx := range txs {
|
||||
txGetParsedPath(tx)
|
||||
}
|
||||
const limitMB = 225
|
||||
mb := retainedHeapMB(func() interface{} { return buildSubpathIndexForTest(txs) })
|
||||
t.Logf("subpath index for 41k production-shaped transmissions keeps %.1f MB", mb)
|
||||
s := &PacketStore{packets: txs}
|
||||
groups := []subpathGroup{{2, 2, 50}, {3, 3, 50}, {4, 4, 50}, {5, 8, 50}}
|
||||
identity := func(h string) string { return h }
|
||||
var before, after runtime.MemStats
|
||||
runtime.GC()
|
||||
runtime.ReadMemStats(&before)
|
||||
res, _ := s.topNamedSubpaths(groups, identity)
|
||||
runtime.ReadMemStats(&after)
|
||||
runtime.KeepAlive(res)
|
||||
mb := float64(after.TotalAlloc-before.TotalAlloc) / (1 << 20)
|
||||
t.Logf("one subpaths request over 41k production-shaped transmissions allocates %.1f MB", mb)
|
||||
const limitMB = 150
|
||||
if mb > limitMB {
|
||||
t.Fatalf("subpath index keeps %.1f MB, limit %d MB", mb, limitMB)
|
||||
t.Fatalf("one subpaths request allocates %.1f MB, limit %d MB", mb, limitMB)
|
||||
}
|
||||
if got := len(res[0]); got != 50 {
|
||||
t.Fatalf("group 2-2 returned %d subpaths, want 50", got)
|
||||
}
|
||||
}
|
||||
|
||||
@@ -0,0 +1,137 @@
|
||||
package main
|
||||
|
||||
import (
|
||||
"testing"
|
||||
"time"
|
||||
)
|
||||
|
||||
// Subpaths are counted per request from the stored paths rather than kept in
|
||||
// a key -> transmissions index. These tests pin the counts the index gave:
|
||||
// every contiguous run of 2-8 hops, once per occurrence, keyed in lower case.
|
||||
|
||||
func setupSubpathCountDB(t *testing.T) *DB {
|
||||
t.Helper()
|
||||
db := setupTestDB(t)
|
||||
now := time.Now().UTC()
|
||||
seen := now.Add(-time.Hour).Format(time.RFC3339)
|
||||
epoch := now.Add(-time.Hour).Unix()
|
||||
db.conn.Exec(`INSERT INTO observers (id, name, iata, last_seen, first_seen, packet_count)
|
||||
VALUES ('obs1', 'Observer One', 'SJC', ?, '2025-01-01T00:00:00Z', 100)`, seen)
|
||||
paths := []string{
|
||||
`["AA","bb","aa","bb"]`, // mixed case; "aa,bb" twice in one path
|
||||
`["aa","bb"]`,
|
||||
`["01","02","03","04","05","06","07","08","09"]`, // longer than 8
|
||||
`["cc"]`, // one hop: no subpaths, not a path for the totals
|
||||
}
|
||||
for i, pj := range paths {
|
||||
db.conn.Exec(`INSERT INTO transmissions (raw_hex, hash, first_seen, route_type, payload_type, decoded_json)
|
||||
VALUES ('01', ?, ?, 1, 4, '{}')`, "subpath_count_"+string(rune('a'+i)), seen)
|
||||
db.conn.Exec(`INSERT INTO observations (transmission_id, observer_idx, snr, rssi, path_json, timestamp)
|
||||
VALUES (?, 1, 10.0, -90, ?, ?)`, i+1, pj, epoch)
|
||||
}
|
||||
return db
|
||||
}
|
||||
|
||||
func subpathCounts(t *testing.T, r map[string]interface{}) (map[string]int, int) {
|
||||
t.Helper()
|
||||
out := map[string]int{}
|
||||
for _, sp := range r["subpaths"].([]map[string]interface{}) {
|
||||
out[sp["path"].(string)] = sp["count"].(int)
|
||||
}
|
||||
return out, r["totalPaths"].(int)
|
||||
}
|
||||
|
||||
func loadedSubpathStore(t *testing.T) *PacketStore {
|
||||
t.Helper()
|
||||
db := setupSubpathCountDB(t)
|
||||
t.Cleanup(func() { db.Close() })
|
||||
store := NewPacketStore(db, nil)
|
||||
if err := store.Load(); err != nil {
|
||||
t.Fatal(err)
|
||||
}
|
||||
if !store.WaitIndexesReady(5 * time.Second) {
|
||||
t.Fatal("indexes never became ready")
|
||||
}
|
||||
return store
|
||||
}
|
||||
|
||||
func TestSubpathCountsPerOccurrenceCaseFolded(t *testing.T) {
|
||||
store := loadedSubpathStore(t)
|
||||
counts, total := subpathCounts(t, store.GetAnalyticsSubpaths("", 2, 2, 100))
|
||||
if total != 3 {
|
||||
t.Errorf("totalPaths = %d, want 3 (the one-hop path is not counted)", total)
|
||||
}
|
||||
if counts["aa → bb"] != 3 {
|
||||
t.Errorf(`"aa → bb" = %d, want 3 (twice in the first path, once in the second): %v`, counts["aa → bb"], counts)
|
||||
}
|
||||
if counts["bb → aa"] != 1 {
|
||||
t.Errorf(`"bb → aa" = %d, want 1`, counts["bb → aa"])
|
||||
}
|
||||
}
|
||||
|
||||
func TestSubpathCountsStopAtEightHops(t *testing.T) {
|
||||
store := loadedSubpathStore(t)
|
||||
counts, _ := subpathCounts(t, store.GetAnalyticsSubpaths("", 8, 20, 100))
|
||||
if len(counts) != 2 {
|
||||
t.Errorf("runs of 8+ hops: %v, want the two 8-hop runs of the 9-hop path only", counts)
|
||||
}
|
||||
}
|
||||
|
||||
func TestSubpathBulkMatchesSingle(t *testing.T) {
|
||||
store := loadedSubpathStore(t)
|
||||
groups := []subpathGroup{{2, 2, 50}, {3, 3, 50}, {4, 8, 50}}
|
||||
bulk := store.GetAnalyticsSubpathsBulk("", groups)
|
||||
store.cacheMu.Lock()
|
||||
store.subpathCache = map[string]*cachedResult{}
|
||||
store.cacheMu.Unlock()
|
||||
for i, g := range groups {
|
||||
b, bt := subpathCounts(t, bulk[i])
|
||||
s, st := subpathCounts(t, store.GetAnalyticsSubpaths("", g.MinLen, g.MaxLen, g.Limit))
|
||||
if bt != st || len(b) != len(s) {
|
||||
t.Fatalf("group %v: bulk %d paths %v, single %d paths %v", g, bt, b, st, s)
|
||||
}
|
||||
for k, v := range s {
|
||||
if b[k] != v {
|
||||
t.Errorf("group %v: %q bulk %d single %d", g, k, b[k], v)
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
func TestSubpathDetailCountsOccurrences(t *testing.T) {
|
||||
store := loadedSubpathStore(t)
|
||||
for _, hops := range [][]string{{"aa", "bb"}, {"AA", "BB"}} {
|
||||
d := store.GetSubpathDetail(hops)
|
||||
if got := d["totalMatches"].(int); got != 3 {
|
||||
t.Errorf("detail %v: totalMatches = %d, want 3", hops, got)
|
||||
}
|
||||
}
|
||||
if got := store.GetSubpathDetail([]string{"01", "02", "03", "04", "05", "06", "07", "08", "09"})["totalMatches"].(int); got != 0 {
|
||||
t.Errorf("a 9-hop run is not a subpath; totalMatches = %d, want 0", got)
|
||||
}
|
||||
if got := store.GetSubpathDetail([]string{"zz", "yy"})["totalMatches"].(int); got != 0 {
|
||||
t.Errorf("unknown subpath: totalMatches = %d, want 0", got)
|
||||
}
|
||||
}
|
||||
|
||||
// The totals the percentages divide by are counted with the subpaths, so
|
||||
// evicted transmissions drop out of them.
|
||||
func TestEvictStaleDropsEvictedPathsFromTotals(t *testing.T) {
|
||||
now := time.Now().UTC()
|
||||
store := makeTestStore(10, now.Add(-48*time.Hour), 0)
|
||||
identity := func(h string) string { return h }
|
||||
groups := []subpathGroup{{MinLen: 2, MaxLen: 8, Limit: 10}}
|
||||
if _, total := store.topNamedSubpaths(groups, identity); total != 10 {
|
||||
t.Fatalf("fixture: totalPaths = %d, want 10", total)
|
||||
}
|
||||
for i := 5; i < 10; i++ {
|
||||
store.packets[i].FirstSeen = now.Add(-time.Hour).Format(time.RFC3339)
|
||||
}
|
||||
store.retentionHours = 24
|
||||
if n := store.EvictStale(); n != 5 {
|
||||
t.Fatalf("evicted %d, want 5", n)
|
||||
}
|
||||
if _, total := store.topNamedSubpaths(groups, identity); total != 5 {
|
||||
t.Errorf("totalPaths = %d after evicting 5 of 10, want 5", total)
|
||||
}
|
||||
}
|
||||
@@ -27,9 +27,10 @@ func TestEstimateStoreTxBytes_ReasonableValues(t *testing.T) {
|
||||
}
|
||||
}
|
||||
|
||||
// TestEstimateStoreTxBytes_ManyHopsSubpaths verifies that packets with many
|
||||
// hops estimate significantly more due to O(path²) subpath index entries.
|
||||
func TestEstimateStoreTxBytes_ManyHopsSubpaths(t *testing.T) {
|
||||
// TestEstimateStoreTxBytes_HopsAreLinear verifies that a longer path costs
|
||||
// one byPathHop entry per hop. Subpaths are counted per request, so the
|
||||
// store no longer pays O(path²) for them.
|
||||
func TestEstimateStoreTxBytes_HopsAreLinear(t *testing.T) {
|
||||
tx2 := &StoreTx{
|
||||
Hash: "aabb",
|
||||
parsedPath: []string{"a", "b"},
|
||||
@@ -42,13 +43,8 @@ func TestEstimateStoreTxBytes_ManyHopsSubpaths(t *testing.T) {
|
||||
}
|
||||
est2 := estimateStoreTxBytes(tx2)
|
||||
est10 := estimateStoreTxBytes(tx10)
|
||||
|
||||
// 10 hops → 45 subpath combos × 40 = 1800 bytes just for subpaths
|
||||
if est10 <= est2 {
|
||||
t.Errorf("10-hop (%d) should estimate more than 2-hop (%d)", est10, est2)
|
||||
}
|
||||
if est10 < est2+1500 {
|
||||
t.Errorf("10-hop (%d) should estimate at least 1500 more than 2-hop (%d)", est10, est2)
|
||||
if want := est2 + 8*perPathHopBytes; est10 != want {
|
||||
t.Errorf("10-hop = %d, want %d (2-hop %d + 8 hops x %d)", est10, want, est2, perPathHopBytes)
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
Reference in New Issue
Block a user