[olpc-nz] power logging
Richard A. Smith
richard at laptop.org
Sun Jan 16 02:43:41 EST 2011
On 01/16/2011 12:44 AM, Tom Parker wrote:
> I miss-spoke, it's not os860, but au852-4. I think this build is based
> on "10.1.2" but I really don't know what that means. I got the build
> from http://download.laptop.org.au/XO/F11/10.1.2/10.1.2-au4/ It appears
> to have powerd 29.
No worries. It means I have to manually add a the KERNAPI but not a big
deal. Looks like you will pick up version 32 on the next test cycle
with the later os builds.
> We usually reflash on external power, but not always. Testing sessions
> last between 3 and 4 hours. We're trying to make a point of charging the
> laptops the night before, so we have a longer session for you.
I think your setup is fine then. No need for the new powerlog step.
Most of your should be a single file with a constant discharge. Perhaps
after I get a few sessions I'll want to tweak it but this seems like a
fine place to start.
> I believe the schoolserver and the laptop share some trust, but I don't
> know exactly how much. I know the laptop does a daily journal backup to
> the XS, it would be possible to include the power information in that
> process. I'm not sure if the schoolserver can request arbitrary files
> from the XO which would be ideal for this purpose (run a script on the
> XS to steal the power logs off all the laptops) but dangerous in many
> other respects which is why I doubt it can be done like that.
Yeah. Its tricky.
Richard A. Smith <richard at laptop.org>
One Laptop per Child
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