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Re: [ts-7000] Avoiding task preemption by Linux kernel

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Subject: Re: [ts-7000] Avoiding task preemption by Linux kernel
From: Gary Wicker <>
Date: Fri, 12 Aug 2011 13:08:19 -0700


Bonjour Dorian,

Avez-vous lisez ./Documentation/spinlocks.txt (dans le kernel source directory)?  Je pense que ça peut vous aider.  Bonne chance.

Gary

On Fri, Aug 12, 2011 at 6:04 AM, tourindorian <> wrote:
Hi,

I'm developing an application (C code) on the TS7550 board, using Linux 2.6. I got an issue trying to use continuously the SPI bus for 20ms.
Every 10ms, the communication is interrupted during about 0.5ms. I guess the Kernel scheduler interrupts the process.

Do you have any idea to fix it? Could I change the tick rate of the scheduler so that it is about 50 or 100ms instead of 10ms? Could I prevent the Kernel from preempting the task during that critical section?

Any idea would be useful :-)

Many thanks,

Dorian.



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