It is possible to select an attribute to use for calculating the weights of the cells in the flamegraph. For example, one can use the Sample Weight attribute, instead of the number of samples, to give the flame graph rendering of Object Allocation Sample event something more useful than just the sample count to work with.

It is however easy to miss if it was the count or Sample Weight that was being used for a graph, since the graph itself doesn't have any hints regarding the attribute used to determine the contribution of a sample. If, for example, the graph is exported to an image, it becomes even harder to know what the configuration of the graph was.