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|
package flamegraph
import (
"encoding/json"
"fmt"
"math/rand"
"sync"
"testing"
"time"
coreflamegraph "ior/internal/flamegraph"
"ior/internal/types"
tea "charm.land/bubbletea/v2"
)
func TestStressHighEventRate(t *testing.T) {
t.Parallel()
const (
workerCount = 10
eventsPerWorker = 10000
testDuration = 5 * time.Second
renderFPS = 30
frameBudget = time.Second / renderFPS
)
allowedBudget := frameBudget * time.Duration(stressBudgetMultiplier())
liveTrie := coreflamegraph.NewLiveTrie([]string{"comm", "path", "tracepoint"}, "count")
var ingestWG sync.WaitGroup
type renderMetrics struct {
err error
samples int
total time.Duration
maxDuration time.Duration
}
renderDone := make(chan renderMetrics, 1)
go func() {
ticker := time.NewTicker(frameBudget)
defer ticker.Stop()
deadline := time.NewTimer(testDuration)
defer deadline.Stop()
metrics := renderMetrics{}
for {
select {
case <-ticker.C:
start := time.Now()
payload, _ := liveTrie.SnapshotJSON()
var snapshot snapshotNode
if err := json.Unmarshal(payload, &snapshot); err != nil {
metrics.err = fmt.Errorf("decode snapshot: %w", err)
renderDone <- metrics
return
}
frames := BuildTerminalLayout(&snapshot, 120, 40)
_ = frames
elapsed := time.Since(start)
metrics.samples++
metrics.total += elapsed
if elapsed > metrics.maxDuration {
metrics.maxDuration = elapsed
}
case <-deadline.C:
renderDone <- metrics
return
}
}
}()
for worker := 0; worker < workerCount; worker++ {
worker := worker
ingestWG.Add(1)
go func() {
defer ingestWG.Done()
for i := 0; i < eventsPerWorker; i++ {
seed := worker*eventsPerWorker + i
traceID := types.SYS_ENTER_READ
if seed%2 == 0 {
traceID = types.SYS_ENTER_WRITE
}
pair := newBenchmarkPair(
fmt.Sprintf("worker-%d", worker),
traceID,
uint32(1000+worker),
uint32(200000+seed),
buildBenchmarkPath(6, 3, seed),
)
liveTrie.Ingest(pair)
pair.Recycle()
}
}()
}
ingestWG.Wait()
metrics := <-renderDone
if metrics.err != nil {
t.Fatalf("render loop failed: %v", metrics.err)
}
if metrics.samples == 0 {
t.Fatal("render loop produced no samples")
}
avg := metrics.total / time.Duration(metrics.samples)
if avg > allowedBudget {
t.Fatalf("average render latency exceeded frame budget: avg=%s budget=%s samples=%d", avg, allowedBudget, metrics.samples)
}
if metrics.maxDuration > allowedBudget*6 {
t.Fatalf("max render latency too high: max=%s budget=%s", metrics.maxDuration, allowedBudget)
}
}
func TestStressRapidResize(t *testing.T) {
t.Parallel()
model := NewModel(nil)
model.width = 120
model.height = 40
model.snapshot = generateTestSnapshot(fixtureMediumDepth, fixtureMediumBreadth)
model.rebuildFrames(false)
if len(model.frames) == 0 {
t.Fatal("expected initial medium fixture frames")
}
rng := rand.New(rand.NewSource(42))
lastWidth, lastHeight := model.width, model.height
for i := 0; i < 100; i++ {
lastWidth = 60 + rng.Intn(241) // [60, 300]
lastHeight = 20 + rng.Intn(61) // [20, 80]
next, _ := model.Update(tea.WindowSizeMsg{Width: lastWidth, Height: lastHeight})
model = next.(Model)
model = settleStressAnimation(model, 180)
assertFramesWithinBounds(t, model.frames, lastWidth, lastHeight)
if len(model.frames) > 0 && (model.selectedIdx < 0 || model.selectedIdx >= len(model.frames)) {
t.Fatalf("invalid selectedIdx after resize %d: idx=%d frames=%d", i, model.selectedIdx, len(model.frames))
}
}
if model.width != lastWidth || model.height != lastHeight {
t.Fatalf("final viewport mismatch: got %dx%d want %dx%d", model.width, model.height, lastWidth, lastHeight)
}
assertFramesWithinBounds(t, model.frames, lastWidth, lastHeight)
}
func TestStressZoomDuringRefresh(t *testing.T) {
t.Parallel()
liveTrie := coreflamegraph.NewLiveTrie([]string{"comm", "path", "tracepoint"}, "count")
ingestStressEvents(liveTrie, 200, 0)
model := NewModel(liveTrie)
model.SetViewport(120, 40)
if changed := model.RefreshFromLiveTrie(); !changed {
t.Fatal("expected initial live trie refresh")
}
if len(model.frames) == 0 {
t.Fatal("expected initial frames after refresh")
}
for i := 0; i < 50; i++ {
ingestStressEvents(liveTrie, 20, 1000+i*20)
_ = model.RefreshFromLiveTrie()
model = settleStressAnimation(model, 180)
if len(model.frames) == 0 {
t.Fatalf("expected frames after refresh tick %d", i)
}
prevDepth := len(model.zoomStack)
model.selectedIdx = midDepthFrameIndex(model.frames)
model.zoomIn()
model = settleStressAnimation(model, 180)
if len(model.zoomStack) != prevDepth+1 {
t.Fatalf("zoom stack did not grow after zoom-in at iteration %d: got=%d want=%d", i, len(model.zoomStack), prevDepth+1)
}
model.zoomUndo()
model = settleStressAnimation(model, 180)
if len(model.zoomStack) != prevDepth {
t.Fatalf("zoom stack depth mismatch after undo at iteration %d: got=%d want=%d", i, len(model.zoomStack), prevDepth)
}
if model.zoomPath != "" {
if findNodeByPath(model.snapshot, model.zoomPath) == nil {
t.Fatalf("zoomPath became invalid after undo at iteration %d: %q", i, model.zoomPath)
}
}
assertFramesWithinBounds(t, model.frames, model.width, model.height)
}
}
func settleStressAnimation(model Model, maxTicks int) Model {
for i := 0; i < maxTicks && model.animating; i++ {
next, _ := model.Update(animTickMsg{})
model = next.(Model)
}
return model
}
func assertFramesWithinBounds(t *testing.T, frames []tuiFrame, width, height int) {
t.Helper()
for _, frame := range frames {
if frame.Col < 0 || frame.Width <= 0 {
t.Fatalf("invalid frame geometry: %+v", frame)
}
if frame.Col+frame.Width > width {
t.Fatalf("frame exceeds width %d: %+v", width, frame)
}
if frame.Row < 0 || frame.Row >= height {
t.Fatalf("frame row outside height %d: %+v", height, frame)
}
}
}
func ingestStressEvents(liveTrie *coreflamegraph.LiveTrie, count, seedBase int) {
for i := 0; i < count; i++ {
seed := seedBase + i
traceID := types.SYS_ENTER_READ
if seed%3 == 0 {
traceID = types.SYS_ENTER_OPENAT
} else if seed%2 == 0 {
traceID = types.SYS_ENTER_WRITE
}
pair := newBenchmarkPair(
fmt.Sprintf("stress-%d", seed%8),
traceID,
uint32(1200+(seed%64)),
uint32(300000+seed),
buildBenchmarkPath(9, 5, seed),
)
liveTrie.Ingest(pair)
pair.Recycle()
}
}
|
