diff options
Diffstat (limited to 'app/perfunwind.cpp')
| -rw-r--r-- | app/perfunwind.cpp | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/app/perfunwind.cpp b/app/perfunwind.cpp index ddb6774..90d3f8c 100644 --- a/app/perfunwind.cpp +++ b/app/perfunwind.cpp @@ -833,8 +833,11 @@ void PerfUnwind::flushEventBuffer(uint desiredBufferSize) auto sortByTime = [](const PerfRecord &lhs, const PerfRecord &rhs) { return lhs.time() < rhs.time(); }; - std::sort(m_mmapBuffer.begin(), m_mmapBuffer.end(), sortByTime); - std::sort(m_sampleBuffer.begin(), m_sampleBuffer.end(), sortByTime); + // stable sort here to keep order of events with the same time + // esp. when we runtime-attach, we will get lots of mmap events with time 0 + // which we must not shuffle + std::stable_sort(m_mmapBuffer.begin(), m_mmapBuffer.end(), sortByTime); + std::stable_sort(m_sampleBuffer.begin(), m_sampleBuffer.end(), sortByTime); if (m_stats.enabled) { for (const auto &sample : m_sampleBuffer) { |