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Re: [rtl] Lost Interrupts at high CPU-load!?

To: Stefan Uhlig <StefanUhlig@web.de>
Subject: Re: [rtl] Lost Interrupts at high CPU-load!?
From: Tomasz Motylewski <motyl@stan.chemie.unibas.ch>
Date: Mon, 1 May 2000 21:22:16 +0200 (CEST)
cc: RT-Linux <rtl@rtlinux.org>
In-Reply-To: <200005011549.RAA01213@statistik.cinetic.de>

On Mon, 1 May 2000, Stefan Uhlig wrote:

> I found out that, if the CPU-load ist quite high, the interrupts are not
> all served and a loss of data is recognized. This problem even appears at
> low interrupt rates at about 1kHz.
> 
> But i can definitely say, that there is a loss of data at high CPU load,
> because i count the ISR-calls and calculate the interrupt-rate throuth a
> periodic thread (1000000000ns).
> Please help if you know the cause!!!

This really should not happen. Could you send me the code you are using?
Which version of the kernel and RTLinux are you using?

How many interrupts are lost per second? 

Best regards,
--
Tomek

References:
- Lost Interrupts at high CPU-load!?
  - From: "Stefan Uhlig" <StefanUhlig@web.de>

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