Hi Earl, On Fri, 28 Jun 2013 08:34:26 -0600, earl middlebrook wrote: > On Fri, Jun 21, 2013 at 4:16 AM, Jean Delvare <khali@xxxxxxxxxxxx> wrote: > > First you should ensure that all power saving options are enabled. > > > > For the CPU, these are C states and cpufreq (although the usefulness of > > cpufreq with good C states can be discussed.) Please install powertop, > > then check the Idle stats and Frequency stats panels (use the Tab key > > to navigate between these in recent versions of powertop.) You should > > see multiple C states in the first and multiple frequencies in the > > second. > > > > When the machine is idle, the CPU should spend most of the time at the > > lowest C states and the lowest frequency. If this isn't the case then > > something is wrong, either in the BIOS or in the kernel. > > Here are Idle stats from PowerTOP: > > ** Package | Core | CPU > 0 CPU 2 > | | C0 active > 4.5% 0.5% > | | POLL > 0.0% 0.0 ms 0.0% 0.0 ms > | | C1-NHM > 0.0% 0.0 ms 0.0% 0.0 ms > C3 (pc3) 16.9% | C3 (cc3) 15.0% | C3-NHM 3.8% 0.9 ms > 12.8% 32.3 ms > C6 (pc6) 59.9% | C6 (cc6) 76.3% | C6-NHM 89.3% 3.7 ms > 86.3% 4.0 ms > > | Core | CPU > 1 CPU 3 > | | C0 active > 1.6% 0.9% > | | POLL > 0.0% 0.0 ms 0.0% 0.0 ms > | | C1-NHM > 0.0% 0.0 ms 0.0% 0.0 ms > | C3 (cc3) 8.5% | C3-NHM 4.3% > 1.1 ms 5.3% 2.3 ms > | C6 (cc6) 86.0% | C6-NHM 92.7% > 3.3 ms 93.2% 3.3 ms This looks reasonable, most time is spent in deepest C state (C6.) > Here are Frequency Stats: > > Package | Core | CPU 0 CPU 2 > | | Actual 2.0 Ghz 1.8 Ghz > Turbo Mode 14.8% | Turbo Mode 12.8% | Turbo Mode 12.5% 5.3% > 2.40 Ghz 0.0% | 2.40 Ghz 0.0% | 2.40 Ghz 0.0% 0.0% > 2.27 Ghz 0.1% | 2.27 Ghz 0.1% | 2.27 Ghz 0.1% 0.0% > 2.14 Ghz 0.0% | 2.14 Ghz 0.0% | 2.14 Ghz 0.0% 0.0% > 2.00 Ghz 0.0% | 2.00 Ghz 0.0% | 2.00 Ghz 0.0% 0.0% > 1.87 Ghz 0.0% | 1.87 Ghz 0.0% | 1.87 Ghz 0.0% 0.0% > 1.74 Ghz 0.9% | 1.74 Ghz 0.6% | 1.74 Ghz 0.5% 0.3% > 1.60 Ghz 0.0% | 1.60 Ghz 0.0% | 1.60 Ghz 0.0% 0.0% > 1466 Mhz 0.0% | 1466 Mhz 0.0% | 1466 Mhz 0.0% 0.0% > 1333 Mhz 0.1% | 1333 Mhz 0.0% | 1333 Mhz 0.0% 0.0% > > | Core | CPU 1 CPU 3 > | | Actual 1.8 Ghz 1.8 Ghz > | Turbo Mode 10.9% | Turbo Mode 10.2% 8.7% > | 2.40 Ghz 0.0% | 2.40 Ghz 0.0% 0.0% > | 2.27 Ghz 0.1% | 2.27 Ghz 0.1% 0.0% > | 2.14 Ghz 0.0% | 2.14 Ghz 0.0% 0.0% > | 2.00 Ghz 0.0% | 2.00 Ghz 0.0% 0.0% > | 1.87 Ghz 0.0% | 1.87 Ghz 0.0% 0.0% > | 1.74 Ghz 0.8% | 1.74 Ghz 0.8% 0.8% > | 1.60 Ghz 0.0% | 1.60 Ghz 0.0% 0.0% > | 1466 Mhz 0.0% | 1466 Mhz 0.0% 0.0% > | 1333 Mhz 0.1% | 1333 Mhz 0.0% 0.0% On my own system there is a last line, "Idle", where most time is spent. I am surprised you don't have it. The total is way less than 100% so I can only guess that the rest of the time is spent in Idle state. If this is the case then it's all OK. > Noticed this in Tunables: > >> Good Using 'ondemand' cpufreq governor > > Could I try to toggle it and see if there is a conflict? No, that's the other way around. "Good" means that powertop thinks this is a good thing with regards to power consumption (and I would agree, even though deep C states save more power than frequency scaling on recent Intel CPU.) The lines you should investigate are the "bad" ones. I have many of these on my own system, BTW :( -- Jean Delvare _______________________________________________ lm-sensors mailing list lm-sensors@xxxxxxxxxxxxxx http://lists.lm-sensors.org/mailman/listinfo/lm-sensors
