On Mon, 20 Aug 2012 07:51:52 -0700, Xin Tong wrote: > On Sun, Aug 19, 2012 at 10:54 PM, Mike Galbraith <efa...@gmx.de> wrote: >> On Sun, 2012-08-19 at 11:58 -0700, Xin Tong wrote: >>> I have 2 questions about linux 2.6 x86_64 scheduler. >>> >>> 1. is the default scheduling algorithm SCHED_NORMAL in linux ? >> >> Yes. > Is there any document describing what the sched_normal is ? it is more > difficult than SCHED_RR to infer its meaning just based on its name ? >> >>> 2. how do i change the time slice in linux source code ? >> >> You shouldn't need to. You can tune "slice" by adjusting >> sched_latency_ns and sched_min_granularity_ns, but note that "slice" is >> not a fixed quantum. Also note that CFS preemption decisions are based >> upon instantaneous state. A task may have received a full (variable) >> "slice" of CPU time, but preemption will be triggered only if a more >> deserving task is available, so a "slice" is not the "max uninterrupted >> CPU time" that you may expect it to be.. but it is somewhat similar. >> >> -Mike >> > This can be done without recompiling and reinstalling the kernel ? > maybe one simply needs to write to a device file under /dev ?
You can find those files under /proc/sys/kernel/. Thanks, Namhyung -- 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/
