#emc-devel | Logs for 2007-10-24

[06:09:37] <fenn> ping pong the ditch is dug
[06:11:40] <fenn> i finished my "grant proposal" or whatever it is: http://fenn.dyndns.org/pub/emc/bfi/bfi-draft.txt
[06:15:27] <fenn> feedback will be thoughtfully considered, but probably not appreciated if your name is jymmm
[12:33:34] <Guest871> Guest871 is now known as skunkworks_
[12:44:26] <jepler> ah, I now understand why the coordinates aren't always exactly equal in these arcs
[12:45:26] <jepler> the offsets are added into the "last coordinates", then subtracted off to do the next arc. (x+a)-a != x in floating-point math
[12:47:52] <skunkworks_> expecially on a pentium 60
[12:51:23] <skunkworks_> jepler: in the new debs you uploaded to the gutsy directory - did you disable the pcspeaker?
[12:54:07] <jepler> skunkworks_: no
[12:54:33] <jepler> all I did was add the linux-ubuntu-modules files .. the kernel is the same
[12:55:27] <skunkworks_> duh - thanks.
[12:55:43] <skunkworks_> good morning
[12:59:41] <jepler> good morning
[13:04:15] <jepler> * jepler starts writing a long-winded commit message
[13:11:48] <skunkworks_> aw - that wasn't _that_ long..
[13:36:37] <jepler> cia didn't show the whole message, though
[13:38:14] <cradek_> cool, that's the good kind of fix.
[13:38:24] <cradek_> cradek_ is now known as cradek
[13:40:35] <jepler> hi chris
[13:40:53] <cradek> hi
[13:41:19] <cradek> "attacks the root cause" whee
[13:42:24] <jepler> stupid floating-point math
[13:43:32] <fenn> damn you, zuse!
[13:45:11] <skunkworks_> yes - that was a long commit message.
[13:45:35] <skunkworks_> * skunkworks_ read it here http://cia.vc/stats/project/emc?s_message=1
[18:46:41] <SWPadnos_> SWPadnos_ is now known as SWPadnos
[18:48:31] <alex_joni> hi guys
[18:48:36] <alex_joni> * alex_joni is driving home :)
[18:50:30] <alex_joni> well.. gotta go, my battery is depleted
[21:13:40] <jepler> http://arxiv.org/abs/0709.4558
[21:14:08] <jepler> FIFO queues with a single reader and writer can be insufficient for "hard real-time" systems where interrupt handlers require wait-free guarantees when writing to message queues. We present an algorithm which elegantly and practically solves this problem on small processors that are often found in embedded systems. ...
[21:15:05] <SWPadnos> if only I could see the paper
[21:15:10] <SWPadnos> (and knew what CAS stood for)
[21:15:26] <SWPadnos> aha - now I see the PDF link :)
[21:15:57] <jepler> compare and swap, I think
[21:16:05] <SWPadnos> so it says in the pdf
[21:19:35] <jepler> bbl
[21:19:41] <SWPadnos> seeya
[21:21:21] <skunkworks_> I would have guessed cam angle sensor or crank angle sensor (but that is where I come from)