In short, settingsched_rt_runtime_usto-1can beextremely dangerous. A value of-1means no limit. In other words, a "run-away" real-time task will be permitted to monopolise a CPU which could (potentially) lock up a system. The default value forsched_rt_runtime_usis950000or0.95seconds....
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I have been playing around with the sched_rt_runtime_us cap that can beused to limit the amount of CPU time allocated towards scheduling rtgroup threads. I am using 2.6.26 with CONFIG_GROUP_SCHED disabled (weuse only the root user in our embedded setup). I have no other...