MegaWizard with LPM_MUX runs extremely slowly and is unusable

I see a similar problem with mega_ramq using Quartus 18. The application appeared to work correctly the first three times, then blocked events with cpu at 100%.

The suggestion that capital letters in the path is a problem, seems absurd. Intel recommends the path must be intelFPGA.

The suggestion that java is a problem seems to have no basis in reality. This is a QT application.

Every time I see the application get stuck it is at the same spot. I see only a single thread.

Initially I suspected a lost partner process, but reboot did not help. Then I considered file corruption.

If I change to a new project, I can generate the IP without any issue. It works at least once.

The problem could be a tight loop around trying to receive a message response, before it has been processed or some bad data in a file; or resource overflow.

Stack Trace ---

#0 0x00007f027961e4a1 in QApplication::compressEvent(QEvent*, QObject*, QPostEventList*) ()

at /opt/intel/intelFPGA/quartus/linux64/libQtGui.so.4

#1 0x00007f027a33ef3e in QCoreApplication::postEvent(QObject*, QEvent*, int) ()

at /opt/intel/intelFPGA/quartus/linux64/libQtCore.so.4

#2 0x00007f027967c475 in QWidget::setVisible(bool) () at /opt/intel/intelFPGA/quartus/linux64/libQtGui.so.4

#3 0x00007f0279b01e27 in QAbstractScrollAreaPrivate::layoutChildren() () at /opt/intel/intelFPGA/quartus/linux64/libQtGui.so.4

#4 0x00007f027a352308 in QObject::event(QEvent*) () at /opt/intel/intelFPGA/quartus/linux64/libQtCore.so.4

#5 0x00007f027967cf8f in QWidget::event(QEvent*) () at /opt/intel/intelFPGA/quartus/linux64/libQtGui.so.4

#6 0x00007f0279a70e7b in QFrame::event(QEvent*) () at /opt/intel/intelFPGA/quartus/linux64/libQtGui.so.4

#7 0x00007f0279b029d9 in QAbstractScrollArea::event(QEvent*) () at /opt/intel/intelFPGA/quartus/linux64/libQtGui.so.4

#8 0x00007f0279b06823 in QScrollArea::event(QEvent*) () at /opt/intel/intelFPGA/quartus/linux64/libQtGui.so.4

#9 0x00007f027961ee4f in QApplicationPrivate::notify_helper(QObject*, QEvent*) ()

at /opt/intel/intelFPGA/quartus/linux64/libQtGui.so.4

#10 0x00007f02796254a3 in QApplication::notify(QObject*, QEvent*) () at /opt/intel/intelFPGA/quartus/linux64/libQtGui.so.4

#11 0x00007f027a33e5b4 in QCoreApplication::notifyInternal(QObject*, QEvent*) ()

at /opt/intel/intelFPGA/quartus/linux64/libQtCore.so.4

#12 0x00007f027a34225e in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) ()

at /opt/intel/intelFPGA/quartus/linux64/libQtCore.so.4

#13 0x00007f027a371313 in () at /opt/intel/intelFPGA/quartus/linux64/libQtCore.so.4

#14 0x00007f027605b387 in g_main_context_dispatch () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0

#15 0x00007f027605b5c0 in () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0

#16 0x00007f027605b64c in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0

#17 0x00007f027a371505 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()

at /opt/intel/intelFPGA/quartus/linux64/libQtCore.so.4

#18 0x00007f02796cf87f in () at /opt/intel/intelFPGA/quartus/linux64/libQtGui.so.4

#19 0x00007f027a33d5c5 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()

at /opt/intel/intelFPGA/quartus/linux64/libQtCore.so.4

#20 0x00007f027a33d998 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) ()

at /opt/intel/intelFPGA/quartus/linux64/libQtCore.so.4