PowerManagementASPM
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Comment: Added Dell Vostro 3450 results
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| For power measurement, we currently recommend using the older version of powertop 1.13 as this clearly displays the ACPI estimated power consumption. A .deb for this can be found [[https://launchpad.net/~lool/+archive/ppa/+sourcepub/2073115/+listing-archive-extra|here]]. We recommend running powertop as follows: | For power measurement, we currently recommend using the older version of powertop 1.13 as this clearly displays the ACPI estimated power consumption. A .deb for powertop-1 can be found [[https://launchpad.net/~lool/+archive/ppa/+sourcepub/2073115/+listing-archive-extra|here]]. We recommend running powertop as follows: |
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| * Boot the machine, start powertop 1.13 | * Boot the machine, start powertop-1 |
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| * Discard the 5 results. | * Discard the first 5 results. |
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| * Run powertop on an idle system and note power consumption | * Run powertop-1 on an idle system and note power consumption |
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| * Restart the PC and choose the new kernel | |
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| * Run powertop on an idle system and note power consumption | * Run powertop-1 on an idle system and note power consumption |
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| ||Dell Vostro 3450||Version: A07||32||3.0.0-12-generic-pae||20.45||3.0.0-13-generic-pae||19.55|| |
ASPM PCIe Bug
As noted by Phoronix ASPM PCIe power saving has been problematic and a recent patch by Matthew Garrett has re-worked this to clear the ASPM state on all devices on a successful handoff of PCIe control to the OS.
We therefore are providing patched kernels carrying Matthew's fix for testing purposes only to see how well this works across a broad range of machines. Kernels can be found in:
For power measurement, we currently recommend using the older version of powertop 1.13 as this clearly displays the ACPI estimated power consumption. A .deb for powertop-1 can be found here. We recommend running powertop as follows:
- Boot the machine, start powertop-1
- Wait until you get an ACPI estimated power consumption value.
- Gather 15 measurements (it is updated regularly).
- Discard the first 5 results.
- Take average of the last 10 results.
Testing procedure:
- Ensure laptop is fully charged
- Unplug AC power
- Run powertop-1 on an idle system and note power consumption
- Plug in AC power
- Install the new kernel containing the ASPM fix
- Restart the PC and choose the new kernel
- Ensure laptop is fully charged
- Unplug AC power
- Run powertop-1 on an idle system and note power consumption
- Gather the BIOS version using: sudo dmidecode -t 0 | grep "Version:"
- Add results to the table below:
Please try and keep table in sorted order on the machine name. Thanks!
Machine |
BIOS |
32/64 bit kernel |
Original Kernel |
Original Kernel Power |
ASPM fix Kernel |
ASPM fix Power |
Dell Vostro 3450 |
Version: A07 |
32 |
3.0.0-12-generic-pae |
20.45 |
3.0.0-13-generic-pae |
19.55 |
HP Mini 210 |
F0.2 |
64 |
3.0.0-12-generic |
14.3W |
3.0.0-13-generic |
8.7W |
HP ProBook 5420s |
68AZZ Ver. F.0F |
64 |
3.0.0-12-generic |
25.06W |
3.0.0-13-generic |
25.66W |
Lenovo 3000N200 |
68ET27WW |
64 |
3.1.0-2-generic |
24.3W |
3.1.0-2-generic |
25.4W |
Lenovo Thinkpad X301 |
6EET54WW (3.14 ) |
64 |
3.1.0-2-generic |
11.4W |
3.1.0-2-generic |
11.4W |
Kernel/PowerManagementASPM (last edited 2012-02-19 14:59:07 by AAnnecy-552-1-244-103)