Messages in this thread | | | Date | Mon, 15 Aug 2011 09:25:03 +0300 | Subject | Re: Is there a way to offload everything from cpu0 to other cpus? | From | Gilad Ben-Yossef <> |
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On Mon, Aug 8, 2011 at 12:41 PM, Américo Wang <xiyou.wangcong@gmail.com> wrote: > On Fri, Aug 5, 2011 at 8:48 PM, Andy Lutomirski <luto@mit.edu> wrote: >> On 08/04/2011 10:53 PM, Yung, Winson W wrote: >>> >>> Hi, I would like to know whether it is possible to offload everything >>> (kernel threads/user apps) to cpu1...x so that I can force cpu0 go into >>> idle?
... >> >> You probably want the isolcpus boot option. > > I think Yung was looking for an interface to move tasks dynamically > after the system is boot. > > Yung, why /sys/devices/system/cpu/cpuX/online doesn't work for you?
I believe setting up a cpuset for cpus 1 to x (call it the system set) and a seperate cpuset for cpu 0 (call it the shielded set) and re-assigning all non CPU bound kernel tasks from the root cpuset to the system cpu set is a better option.
There's a guide on how to do that on the RT wiki: https://rt.wiki.kernel.org/index.php/CPU_shielding_using_/proc_and_/dev/cpuset
Gilad
-- Gilad Ben-Yossef Chief Coffee Drinker gilad@benyossef.com Israel Cell: +972-52-8260388 US Cell: +1-973-8260388 http://benyossef.com "Dance like no one is watching, love like you'll never be hurt, sing like no one is listening... but for BEEP sake you better code like you're going to maintain it for years!" -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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