Re: [CPUISOL] CPU isolation extensions

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To: Max Krasnyanskiy <maxk@...>

Cc: Peter Zijlstra <a.p.zijlstra@...>, <linux-kernel@...>, Ingo Molnar <mingo@...>, Steven Rostedt <srostedt@...>, Gregory Haskins <ghaskins@...>, Paul Jackson <pj@...>

Subject: Re: [CPUISOL] CPU isolation extensions

Date: Monday, January 28, 2008 - 7:41 pm

On Mon, 2008-01-28 at 10:32 -0800, Max Krasnyanskiy wrote:
quoted text> Just this patches. RT patches cannot achieve what I needed. Even RTAI/Xenomai can't do that.
> For example I have separate tasks with hard deadlines that must be enforced in 50usec kind 
> of range and basically no idle time whatsoever. Just to give more background it's a wireless
> basestation with SW MAC/Scheduler. Another requirement is for the SW to know precise timing
> because SW. For example there is no way we can do predictable 1-2 usec sleeps. 
> So I wrote a user-space engine that does all this, it requires full control of the CPU ie minimal
> overhead from the kernel, just IPIs for memory management and that's basically it. When my legal 
> department lets me I'll do a presentation on this stuff at Linux RT conference or something. 

What kind of hardware are you doing this on? Also I should note there is
HRT (High resolution timers) which provided microsecond level
granularity ..

Daniel

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Messages in current thread:

[CPUISOL] CPU isolation extensions, , (Mon Jan 28, 12:09 am)

Re: [CPUISOL] CPU isolation extensions, Mark Hounschell, (Thu Jan 31, 8:16 am)

Re: [CPUISOL] CPU isolation extensions, Max Krasnyanskiy, (Thu Jan 31, 3:13 pm)

Re: [CPUISOL] CPU isolation extensions, Peter Zijlstra, (Mon Jan 28, 5:08 am)

Re: [CPUISOL] CPU isolation extensions, Max Krasnyanskiy, (Mon Jan 28, 2:32 pm)

Re: [CPUISOL] CPU isolation extensions, Daniel Walker, (Mon Jan 28, 7:41 pm)

Re: [CPUISOL] CPU isolation extensions, Max Krasnyanskiy, (Mon Jan 28, 8:12 pm)

Re: [CPUISOL] CPU isolation extensions, Daniel Walker, (Mon Jan 28, 9:33 pm)

Re: [CPUISOL] CPU isolation extensions, Max Krasnyansky, (Mon Feb 4, 2:53 am)

Re: [CPUISOL] CPU isolation extensions, Paul Jackson, (Mon Jan 28, 3:10 pm)

Re: [CPUISOL] CPU isolation extensions, Paul Jackson, (Mon Jan 28, 10:59 am)

Re: [CPUISOL] CPU isolation extensions, Max Krasnyanskiy, (Mon Jan 28, 2:37 pm)

Re: [CPUISOL] CPU isolation extensions, Paul Jackson, (Mon Jan 28, 3:06 pm)

Integrating cpusets and cpu isolation [was Re: [CPUISOL] CPU..., Max Krasnyanskiy, (Thu Jan 31, 3:06 pm)

Re: Integrating cpusets and cpu isolation [was Re: [CPUISOL]..., Paul Jackson, (Sat Feb 2, 2:16 am)

Re: Integrating cpusets and cpu isolation [was Re: [CPUISOL]..., Max Krasnyansky, (Sun Feb 3, 1:57 am)

Re: Integrating cpusets and cpu isolation [was Re: [CPUISOL]..., Paul Jackson, (Sun Feb 3, 3:53 am)

Re: Integrating cpusets and cpu isolation [was Re: [CPUISOL]..., Max Krasnyansky, (Mon Feb 4, 2:03 am)

Re: Integrating cpusets and cpu isolation [was Re: [CPUISOL]..., Paul Jackson, (Mon Feb 4, 6:54 am)

Re: Integrating cpusets and cpu isolation [was Re: [CPUISOL]..., Max Krasnyanskiy, (Mon Feb 4, 7:19 pm)

Re: Integrating cpusets and cpu isolation [was Re: [CPUISOL]..., Paul Jackson, (Mon Feb 4, 10:46 pm)

Re: Integrating cpusets and cpu isolation [was Re: [CPUISOL]..., Max Krasnyansky, (Tue Feb 5, 12:08 am)

Re: [CPUISOL] CPU isolation extensions, Max Krasnyanskiy, (Mon Jan 28, 5:47 pm)

Re: [CPUISOL] CPU isolation extensions, Steven Rostedt, (Mon Jan 28, 12:34 pm)

Re: [CPUISOL] CPU isolation extensions, Max Krasnyanskiy, (Mon Jan 28, 2:46 pm)

Re: [CPUISOL] CPU isolation extensions, Steven Rostedt, (Mon Jan 28, 3:00 pm)

Re: [CPUISOL] CPU isolation extensions, Peter Zijlstra, (Mon Jan 28, 4:22 pm)

CPU isolation and workqueues [was Re: [CPUISOL] CPU isolatio..., Max Krasnyanskiy, (Mon Feb 4, 8:32 pm)

Re: [CPUISOL] CPU isolation extensions, Max Krasnyanskiy, (Mon Jan 28, 5:42 pm)

Re: [CPUISOL] CPU isolation extensions, Peter Zijlstra, (Mon Jan 28, 12:44 pm)

Re: [CPUISOL] CPU isolation extensions, Max Krasnyanskiy, (Mon Jan 28, 2:54 pm)

[PATCH] [CPUISOL] Add config options for CPU isolation, , (Mon Jan 28, 12:09 am)

[PATCH] [CPUISOL] Export CPU isolation bits, , (Mon Jan 28, 12:09 am)


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Re: [CPUISOL] CPU isolation extensions

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