Adaptive Protocols for Software Distributed Shared Memory

We demonstrate the bene ts of software shared mem ory protocols that adapt at run time to the memory access patterns observed in the applications This adaptation is automatic no user annotations are required and does not rely on compiler support or special hardware We in vestigate adaptation between single and multiple writer protocols dynamic aggregation of pages into a larger trans fer unit and adaptation between invalidate and update Our results indicate that adaptation between single and multiple writer and dynamic page aggregation are clearly bene cial The results for the adaptation between invali date and update are less compelling showing at best gains similar to the dynamic aggregation adaptation and at worst serious performance deterioration