Three observations: First, there was a lot of research in this area in the context of minimising data center power usage. But the main players who stand to ben

Three observations: First, there was a lot of research in this area in the context of minimising data center power usage. But the main players who stand to benefit from improving power consumption operate in places where power is very cheap (they specifically place their data centers in such areas) and they are also making record profits. Perhaps there isn't a huge case for power optimization economically? Second, ARM is slowly gaining traction in the server market, but Intel is the leader in this field. Semiconductor companies do spend a lot of time and resources on this, perhaps alleviating the need for the problem to be dealt with in the software stack. Third, CPU frequency controls are already present in the Linux OS, which is the top server OS, and quite a bit of work has gone into it. This is the main mechanism for optimizing power consumption as far as I can tell.