Performance parameters experiments perspective

In its physics program for the next two decades, the LHC foresees a series of upgrades to steadily increase the instantaneous luminosity of the accelerator. This paper describes the experimental challenges for the ATLAS and CMS detectors to operate and perform at increasing rates and occupancies. It focuses on the upgrades that will be implemented to maintain the physics acceptance in the trigger selection and the high efficiency and resolution in the reconstruction of the many interactions that will occur at each beam crossing.