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Re: [CPUISOL] CPU isolation extensions
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From: Max Krasnyanskiy
Subject:
Re: [CPUISOL] CPU isolation extensions
Date: Monday, January 28, 2008 - 2:47 pm
Paul Jackson wrote:
quoted text
> Max wrote: >> So far it seems that extending cpu_isolated_map >> is more natural way of propagating this notion to the rest of the kernel. >> Since it's very similar to the cpu_online_map concept and it's easy to integrated >> with the code that already uses it. > > If it were just realtime support, then I suspect I'd agree that > extending cpu_isolated_map makes more sense. > > But some people use realtime on systems that are also heavily > managed using cpusets. The two have to work together. I have > customers with systems running realtime on a few CPUs, at the > same time that they have a large batch scheduler (which is layered > on top of cpusets) managing jobs on a few hundred other CPUs. > Hence with the cpuset 'sched_load_balance' flag I think I've already > done what I think is one part of what your patches achieve by extending > the cpu_isolated_map. > > This is a common situation with "resource management" mechanisms such > as cpusets (and more recently cgroups and the subsystem modules it > supports.) They cut across existing core kernel code that manages such > key resources as CPUs and memory. As best we can, they have to work > with each other.
Thanks for the info Paul. I'll definitely look into using this flag instead and reply with pros and cons (if any). Max --
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Messages in current thread:
[CPUISOL] CPU isolation extensions
, maxk
, (Sun Jan 27, 9:09 pm)
[PATCH] [CPUISOL] Add config options for CPU isolation
, maxk
, (Sun Jan 27, 9:09 pm)
[PATCH] [CPUISOL] Export CPU isolation bits
, maxk
, (Sun Jan 27, 9:09 pm)
Re: [CPUISOL] CPU isolation extensions
, Peter Zijlstra
, (Mon Jan 28, 2:08 am)
Re: [CPUISOL] CPU isolation extensions
, Paul Jackson
, (Mon Jan 28, 7:59 am)
Re: [CPUISOL] CPU isolation extensions
, Steven Rostedt
, (Mon Jan 28, 9:34 am)
Re: [CPUISOL] CPU isolation extensions
, Peter Zijlstra
, (Mon Jan 28, 9:44 am)
Re: [CPUISOL] CPU isolation extensions
, Max Krasnyanskiy
, (Mon Jan 28, 11:32 am)
Re: [CPUISOL] CPU isolation extensions
, Max Krasnyanskiy
, (Mon Jan 28, 11:37 am)
Re: [CPUISOL] CPU isolation extensions
, Max Krasnyanskiy
, (Mon Jan 28, 11:46 am)
Re: [CPUISOL] CPU isolation extensions
, Max Krasnyanskiy
, (Mon Jan 28, 11:54 am)
Re: [CPUISOL] CPU isolation extensions
, Steven Rostedt
, (Mon Jan 28, 12:00 pm)
Re: [CPUISOL] CPU isolation extensions
, Paul Jackson
, (Mon Jan 28, 12:06 pm)
Re: [CPUISOL] CPU isolation extensions
, Paul Jackson
, (Mon Jan 28, 12:10 pm)
Re: [CPUISOL] CPU isolation extensions
, Peter Zijlstra
, (Mon Jan 28, 1:22 pm)
Re: [CPUISOL] CPU isolation extensions
, Max Krasnyanskiy
, (Mon Jan 28, 2:42 pm)
Re: [CPUISOL] CPU isolation extensions
, Max Krasnyanskiy
, (Mon Jan 28, 2:47 pm)
Re: [CPUISOL] CPU isolation extensions
, Daniel Walker
, (Mon Jan 28, 4:41 pm)
Re: [CPUISOL] CPU isolation extensions
, Max Krasnyanskiy
, (Mon Jan 28, 5:12 pm)
Re: [CPUISOL] CPU isolation extensions
, Daniel Walker
, (Mon Jan 28, 6:33 pm)
Re: [CPUISOL] CPU isolation extensions
, Mark Hounschell
, (Thu Jan 31, 5:16 am)
Integrating cpusets and cpu isolation [was Re: [CPUISOL] C ...
, Max Krasnyanskiy
, (Thu Jan 31, 12:06 pm)
Re: [CPUISOL] CPU isolation extensions
, Max Krasnyanskiy
, (Thu Jan 31, 12:13 pm)
Re: Integrating cpusets and cpu isolation [was Re: [CPUISO ...
, Paul Jackson
, (Fri Feb 1, 11:16 pm)
Re: Integrating cpusets and cpu isolation [was Re: [CPUISO ...
, Max Krasnyansky
, (Sat Feb 2, 10:57 pm)
Re: Integrating cpusets and cpu isolation [was Re: [CPUISO ...
, Paul Jackson
, (Sun Feb 3, 12:53 am)
Re: Integrating cpusets and cpu isolation [was Re: [CPUISO ...
, Max Krasnyansky
, (Sun Feb 3, 11:03 pm)
Re: [CPUISOL] CPU isolation extensions
, Max Krasnyansky
, (Sun Feb 3, 11:53 pm)
Re: Integrating cpusets and cpu isolation [was Re: [CPUISO ...
, Paul Jackson
, (Mon Feb 4, 3:54 am)
Re: Integrating cpusets and cpu isolation [was Re: [CPUISO ...
, Max Krasnyanskiy
, (Mon Feb 4, 4:19 pm)
CPU isolation and workqueues [was Re: [CPUISOL] CPU isolat ...
, Max Krasnyanskiy
, (Mon Feb 4, 5:32 pm)
Re: Integrating cpusets and cpu isolation [was Re: [CPUISO ...
, Paul Jackson
, (Mon Feb 4, 7:46 pm)
Re: Integrating cpusets and cpu isolation [was Re: [CPUISO ...
, Max Krasnyansky
, (Mon Feb 4, 9:08 pm)
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