Better ACPI, Power Management For Linux 3.12 Kernel

[phoronix]

Phoronix: Better ACPI, Power Management For Linux 3.12 Kernel

The Linux 3.12 kernel will feature improvements to ACPI and power management in general thanks to recent developments...

http://www.phoronix.com/vr.php?view=MTQ1MzA

[drev]

was not it for the 3.10 and 3.11 kernels ? oh well I guess it's a work in progress for several releases

[xnor]

cpufreq on demand governor should now choose target frequencies proportionally to load

What did it do before?

Btw, does it have a (configurable) hysteresis?

[droste]

What did it do before?

It was more like: no load -> min freq, some load -> max freq.

Btw, does it have a (configurable) hysteresis?

Yes: https://wiki.archlinux.org/index.php...emand_governor

/edit:
Just wanted to add: I liked the old way, because that way the task gets finished faster and the cpu can go back to min freq. faster. But this is only true if the task is not some long running program which causes a medium load over a long period of time (e.g. non-desktop loads).

[liam]

Phoronix: Better ACPI, Power Management For Linux 3.12 Kernel

The Linux 3.12 kernel will feature improvements to ACPI and power management in general thanks to recent developments...

http://www.phoronix.com/vr.php?view=MTQ1MzA

So, no infrastructure progress towards supporting intel smart connect?
I can see this being low priority since it's not intended for servers, but it would be great for laptops.

[curaga]

It was more like: no load -> min freq, some load -> max freq.

Just adding that idle priority loads did not cause a bump in speed. One could run John on all cores and they would stay at the lowest freq.

[Pallidus]

sandy laptop under win8 -> ~160 min moderate use

sandy laptop under 3.8 -> ~ 100 min moderate use