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From: Ole-Hjalmar Kristensen <ole-hjalmar.kristensen@substitute_employer_here.com>
Subject: Re: TRON for AdaOS
Date: 18 Feb 2005 10:13:13 +0100
Date: 2005-02-18T09:13:23+00:00	[thread overview]
Message-ID: <wvbrfyzuxmc6.fsf@sun.com> (raw)
In-Reply-To: 1886813.de8De94B0N@jellix.jlfencey.com


On my system, it's surely not guaranteed. But it's perfectly adequate
for building soft real time systems.
My point is that the task switching overhead itself is very low on
Linux. I did not say anything about the granularity of the time slice.
My test program also includes the overhead in accessing a shared
protected object, btw.

>>>>> "V'H" == Vinzent 'Gadget' Hoefler <nntp-2005-02@t-domaingrabbing.de> writes:

    V'H> Ole-Hjalmar Kristensen wrote:
    >> I would be very surprised if "RTLinux switches tasks in milliseconds"
    >> actually is true. On my system, (a vanilla Linux admittedly :
    >> 2.4.9-e.34smp #1 SMP ), task switching takes about 4.5 microseconds.

    V'H> And that timing is guaranteed?


    V'H> Vinzent.

    V'H> -- 
    V'H> worst case: The wrong assumption there actually is one.

-- 
   C++: The power, elegance and simplicity of a hand grenade.



  reply	other threads:[~2005-02-18  9:13 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2005-02-17  7:31 TRON for AdaOS Marius Amado Alves
2005-02-17 12:50 ` Marin David Condic
2005-02-17 13:37   ` Marius Amado Alves
2005-02-17 14:37     ` Ole-Hjalmar Kristensen
2005-02-17 14:55       ` Vinzent 'Gadget' Hoefler
2005-02-18  9:13         ` Ole-Hjalmar Kristensen [this message]
2005-02-18  9:46           ` Vinzent 'Gadget' Hoefler
2005-02-18 13:20       ` Marin David Condic
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