A method of dynamically controlling use of a shared computing resource by a set of virtual-computing sessions of a client computing device includes state identification operations on per-virtual-channel event data to identify activity states of virtual channels of the sessions, performing a resource allocation operation on activity state data including (i) accumulating activity state data for all virtual channels of each session to produce per-session activity values, and (ii) using the per-session activity values to generate resource usage control signals representing a target pattern of use of the shared computing resource by the sessions based on their activity values. An enforcement operation uses the resource usage control signals to establish the target pattern of use of the shared resource of the sessions.