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[Oracle/Tests] Measure parse against post-fixture baseline; assert release empties sets

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Lukas Brübach 2026-09-02 14:55:52 +02:00 • committed by GitHub
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1 changed files with 16 additions and 3 deletions
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19
tests/oracle/oracle_importer_benchmark_test.cpp
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@ -353,8 +353,9 @@ static void logRamPhase(const QString &phase, const MemorySnapshot &baseline, co
// VmHWM / ru_maxrss are monotonically non-decreasing high-water marks, so a
// peak-based delta between phases is ~0.0 MB by construction once the
// fixture build has set the process peak. The live signals are current RSS
// and the process peak; the delta is only meaningful where current RSS is
// a per-phase value (see "after releaseSetData()").
// and the process peak; the delta is meaningful only where the baseline was
// taken immediately before the phase it measures (e.g. the import phase,
// which compares afterParse against afterImport).
QString rssDelta = "N/A";
if (current.rssKb >= 0 && baseline.rssKb >= 0) {
rssDelta = formatKb(current.rssKb - baseline.rssKb);
@ -435,6 +436,13 @@ TEST(OracleBenchmark, ImportRamUsage)
const QByteArray data = buildSyntheticData(numSets, cardsPerSet);
// The fixture build leaves freed-but-unreturned arenas behind (current RSS
// rarely falls once glibc allocates). Baseline immediately after it so the
// parse phase measures only the importer's own growth (~40 MB) rather than
// swallowing the fixture builder's spike.
const MemorySnapshot afterFixture = MemorySnapshot::current();
logRamPhase("fixture build", baseline, afterFixture);
NoopCardSetPriorityController controller;
OracleImporter importer;
@ -459,9 +467,14 @@ TEST(OracleBenchmark, ImportRamUsage)
.arg(data.size() / (1024.0 * 1024.0), 0, 'f', 1);
qDebug().noquote() << QString(" JSON parse: %1 ms").arg(parseMs);
qDebug().noquote() << QString(" Card import: %1 ms").arg(importMs);
logRamPhase("parse", baseline, afterParse);
logRamPhase("parse", afterFixture, afterParse);
logRamPhase("import", afterParse, afterImport);
logRamPhase("after releaseSetData()", afterImport, afterRelease);
// Freeing the parsed tree rarely moves current RSS (allocator reuse), so the
// meaningful signal that release actually dropped the buffers is emptiness,
// not an RSS delta.
ASSERT_TRUE(importer.getSets().isEmpty());
}
TEST(OracleBenchmark, ImportRamUsageAllPrintings)