25.04.2014, 00:16, "Kirill Tkhai" <tk...@yandex.ru>: > 24.04.2014, 22:59, "Peter Zijlstra" <pet...@infradead.org>: > > [snip] > >>> Does anyone use rt-scheduler for runtime-like cpu-bound tasks? >> So in general cpu bound tasks in the RT classes (FIFO/RR/DEADLINE) are >> bad and can make the system go funny. >> >> For general system health it is important that various system tasks >> (kthreads usually) can run. Many of these kthreads run at !rt prios, and >> by having cpu bound tasks in rt prios they don't get to run. > > One more word to this. I had such expirience on 2.6.33 kernel with RT patch > and weak hardware (sparc32). > > Networking was actively used and application did not use any IO operations. > > User needs to set all RT priorities by himself. It's necessary to set RT > priorities at least for softirqs and rcus. RT bandwidth must be switched > off.
I disable RT bandwidth sharing and change rt_period/rt_runtime to 1/100 ms respectively. Thanks, Roman -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
