On Thu, 2010-08-12 at 23:17 -0400, jordan johnston wrote: > > Google did Android and even Palm woke up (just long enough to watch its own > > demise). > > > > The rest is history. > > > > Except of course putting the RT Kernel in Android. > > As i understand it, many Android users are using the BFS patchset, and > have been for a while. BFS pretty much does what "the end result of > using the rt-patches" accomplish, minus rtirq, spin-locks, etc. You > will get the desired > responsiveness that using RT would give you. > I assume that it might well depend to some extent on whether I am pumping market data feeds into a processing model using 512 CPUs or playing a game on my Nexus-1, but I won't disagree agree with you on the importance of task-appropriate efficient scheduling, appropriate workload partitioning, and all that jazz. > Im pretty sure that is why Zen-kernel has a git repository "very > specifically" for android (BFS is the default kernel setting). I'm > sure there are other goodies for android in there too. > > www.zen-kernel.org > > I don't know much about the Android repo's state (as it's fairly new). > but worth a > look for your "rt-usage" (ie. performance/responsiveness) for android. > As i do not own an Android, i have not tested it, but i have talked > with people who do.. > > I'm waiting to see what 2.6.35 holds for RT.... but personally i am > using BFS and 2.6.34 with a lot of performance tuning (a good deal of > time spent analyzing/tuning) and i am yielding better results not > using the upstream rt-patches. > we will see what happens in 2.6.35/36.... > Sounds good. I know there has been some extensive discussion about the interpretation and applicability of the various scheduler performance metrics, including special examination of BFS vs. CFS - and I definitely think that has been hashed out in gore and detail already. But if you have some pretty plots that characterize performance for your platform, vs. Preempt-RT, I am always interested in looking at pictures and numbers about what's happening on the other side of the fence. Cheers, Sven > just my 2 cents :) > > cheers > > jordan -- To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
