This metric shows how memory subsystem issues affect the performance. Memory Bound measures a fraction of slots where pipeline could be stalled due to demand load or store instructions. This accounts mainly for incomplete in-flight memory demand loads that coincide with execution starvation in addition to less common cases where stores could imply back-pressure on the pipeline.
The metric value is high. This can indicate that the significant fraction of execution pipeline slots could be stalled due to demand memory load and stores. Use Memory Access analysis to have the metric breakdown by memory hierarchy, memory bandwidth information, correlation by memory objects.