Revert "Input: Send events one packet at a time"

This reverts commit 01974fddad5c02bd9fdf10c080004f41aff43f24.
Revert "GPU overclock test 2"

This reverts commit de6d3a43080de89df10984ef811a5b2b3f712c80.
drop caches more agressively
This does decrease overall write throughput, but to the benefit of the latency
of the system as a whole with disk writes.