While it may have seemed like PowerTop was idling by
for a while without a new release or any major advancements to this open-source utility for analyzing power consumption to find programs causing more wake-ups than necessary and to provide other power savings tips on Intel-based Linux systems, a new release has emerged. Intel released PowerTop v1.13 recently and it adds a few new features to the power table along with a number of bug-fixes.
Arjan van de Ven of Intel shares that the new features of PowerTop 1.13 include supporting Run-Time Device Power Management both for recommending it be enabled and to collect RDPM statistics, the ability to report which application is keeping the disk from entering its power-saving mode, reporting of AHCI Link power management statistics, the ability to report audio power saving statistics if an application is preventing the system from putting the audio in a low-power state, and lastly is the ability to report the use of Intel Turbo Mode on modern CPUs like the Intel Core i7
The fixes in PowerTop 1.13 include power-saving suggestions now properly going away when applying them, not turning on USB power management for USB input devices as they have a tendency to break, better reporting of Ethernet activity with multi-queue networking, recognize CPU HPET in timer reporting, and various WiFi power-saving API changes/tweaks.
The latest release of Intel's PowerTop can be downloaded from its web-site at LessWatts.org