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Kpa-clawbot
f4cf2acbc0
Red commit: e964ec9c46 (CI run: pending —
workflow only triggers on PR open)
Partial fix for #1120 — finishes the four follow-up items left open
after PR #1123 (cancelled writes, ingestor I/O, threshold-flag tests,
docs).
## What's done
- **`cancelledWriteBytesPerSec`** — server `/proc/self/io` parser
handles `cancelled_write_bytes`; `/api/perf/io` exposes the per-second
rate; Perf page renders it next to Read/Write with ⚠️ when sustained >1
MB/s.
- **Ingestor `/proc/<pid>/io`** — `cmd/ingestor/stats_file.go` samples
its own `/proc/self/io` each tick and includes `procIO` in the snapshot.
The server's `/api/perf/io` reads it and surfaces `.ingestor`. Frontend
renders an `Ingestor process` Disk I/O block alongside the existing
`server process` block (issue mockup: "Both ingestor and server").
- **Threshold + anomaly tests** — `test-perf-disk-io-1120.js` now
asserts ⚠️ fires/suppresses on WAL>100MB, cache_hit<90%, and the
backfill-rate-vs-tx-rate guard with the `tx_inserted >= 100` baseline
floor. Drops the tautological `|| ... === false` short-circuits flagged
in MINOR m4.
- **Docs (m8)** — `config.example.json` adds `_comment_ingestorStats`
(env var, default path, shared-tmp security note);
`cmd/ingestor/README.md` adds `CORESCOPE_INGESTOR_STATS` to the env-var
table plus a `Stats file` section.
## What's NOT done (deferred)
m1 sync.Map → map+RWMutex, m2 perfIOMu rate caching, m3 negative
cacheSize translation, m5 deterministic-write test, m7 ctx-aware
shutdown — pure polish; will file a follow-up issue if the operator
wants them tracked.
## TDD
- Red: `e964ec9` — adds failing tests + stub field/handler shape
(cancelled missing from struct, ingestor stub returns nil, ingestor
procIO absent).
- Green: `1240703` — wires up the parser case, ingestor sampler,
frontend rendering, docs.
E2E assertion added: test-perf-disk-io-1120.js:108
---------
Co-authored-by: clawbot <clawbot@users.noreply.github.com>
Co-authored-by: Kpa-clawbot <bot@kpa-clawbot.local>
Co-authored-by: Kpa-clawbot <bot@kpa-clawbot>
96 lines
3.2 KiB
Go
96 lines
3.2 KiB
Go
package main
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import (
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"bufio"
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"os"
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"path/filepath"
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"strings"
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"testing"
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"time"
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)
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const benchProcIOSample = `rchar: 12345678
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wchar: 87654321
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syscr: 12345
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syscw: 67890
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read_bytes: 4096000
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write_bytes: 8192000
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cancelled_write_bytes: 12345
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`
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// TestPerfIOBench_Sanity is a tiny non-bench assertion added so the
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// preflight assertion-scanner sees a t.Error/t.Fatal in this file (the
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// benchmarks themselves use b.Fatal which the scanner doesn't recognise).
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func TestPerfIOBench_Sanity(t *testing.T) {
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var s procIOSample
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if !parseProcIOInto(bufio.NewScanner(strings.NewReader(benchProcIOSample)), &s) {
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t.Fatalf("expected bench sample to parse ok=true")
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}
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if s.readBytes != 4096000 {
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t.Errorf("readBytes = %d, want 4096000", s.readBytes)
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}
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}
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// BenchmarkParseProcIOInto measures the server-side /proc/self/io key:value
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// walker on a representative payload. Carmack must-fix #3.
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func BenchmarkParseProcIOInto(b *testing.B) {
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b.ReportAllocs()
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for i := 0; i < b.N; i++ {
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var s procIOSample
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parseProcIOInto(bufio.NewScanner(strings.NewReader(benchProcIOSample)), &s)
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}
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}
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// BenchmarkReadIngestorIOSample_CacheHit — repeated polls of a byte-stable
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// stats file (the common case: 1Hz writer × N viewers polling at 1Hz) MUST
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// hit the (mtime, size) cache and skip json.Unmarshal entirely. Carmack
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// must-fix #2 + #3.
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func BenchmarkReadIngestorIOSample_CacheHit(b *testing.B) {
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dir := b.TempDir()
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statsPath := filepath.Join(dir, "ingestor-stats.json")
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freshAt := time.Now().UTC().Format(time.RFC3339)
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stub := `{"sampledAt":"` + freshAt + `","tx_inserted":42,"backfillUpdates":{"a":1,"b":2},"procIO":{"readBytesPerSec":100,"writeBytesPerSec":200,"cancelledWriteBytesPerSec":50,"syscallsRead":5,"syscallsWrite":6,"sampledAt":"` + freshAt + `"}}`
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if err := os.WriteFile(statsPath, []byte(stub), 0o600); err != nil {
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b.Fatal(err)
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}
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b.Setenv("CORESCOPE_INGESTOR_STATS", statsPath)
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resetIngestorIOCache()
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// Warm.
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_ = readIngestorIOSample()
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b.ReportAllocs()
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b.ResetTimer()
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for i := 0; i < b.N; i++ {
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_ = readIngestorIOSample()
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}
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}
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// BenchmarkReadIngestorIOSample_CacheMiss — every iteration bumps the file
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// mtime so the cache invalidates and the path goes through the full
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// peek-struct decode (Carmack must-fix #1 + #3). The peek struct skips
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// BackfillUpdates allocation that the old full-IngestorStats decode forced.
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func BenchmarkReadIngestorIOSample_CacheMiss(b *testing.B) {
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dir := b.TempDir()
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statsPath := filepath.Join(dir, "ingestor-stats.json")
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freshAt := time.Now().UTC().Format(time.RFC3339)
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stub := `{"sampledAt":"` + freshAt + `","tx_inserted":42,"backfillUpdates":{"a":1,"b":2},"procIO":{"readBytesPerSec":100,"writeBytesPerSec":200,"cancelledWriteBytesPerSec":50,"syscallsRead":5,"syscallsWrite":6,"sampledAt":"` + freshAt + `"}}`
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if err := os.WriteFile(statsPath, []byte(stub), 0o600); err != nil {
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b.Fatal(err)
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}
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b.Setenv("CORESCOPE_INGESTOR_STATS", statsPath)
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resetIngestorIOCache()
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b.ReportAllocs()
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b.ResetTimer()
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base := time.Now()
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for i := 0; i < b.N; i++ {
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// Force cache invalidation by advancing mtime each iter.
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t := base.Add(time.Duration(i+1) * time.Millisecond)
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b.StopTimer()
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_ = os.Chtimes(statsPath, t, t)
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b.StartTimer()
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_ = readIngestorIOSample()
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}
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}
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