-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Somebody in the thread at some point said: | A quick and awesome response ;) | | I will keep in mind that, 1us is a really quick reaction time (like | your replies ;)) but the goal is for running a plc software so I | need to assure a regular latency time more than the quickest time | possible( but it helps to know than this react time is even | possible).
OK FIQ doesn't help :-) "Real time" means a few different things. | kernel is able to connect with the high precision clocks of the arm | processor? I don't know about any really high precision clocks (I looked in vain for a CPU cycle counter register) a while back, but Andrzej Zaborowski has a patch in the andy branch that allows "dynamic tick" scheduling to much higher resolution than normal http://git.openmoko.org/?p=kernel.git;a=commitdiff;h=c27edf64d78abb0bb8d3004a231b6a2fb4c9931e he's planning to use it to get low jitter mplayer action. I guess this won't do any harm for realtime. - -Andy -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (GNU/Linux) Comment: Using GnuPG with Fedora - http://enigmail.mozdev.org iEYEARECAAYFAkhrgicACgkQOjLpvpq7dMpW2QCeP1ZAj01NILlZHljyiiI4lRwJ BiMAnimMUHx5Oa/dkm+CTYsp1ujlZFOM =nxq6 -----END PGP SIGNATURE-----
