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From: Grant Likely <grant.likely@secretlab.ca>
Date: Sat, 6 Jun 2009 11:27:36 -0600
Message-ID: <fa686aa40906061027p41b8885aoda857a5a70a23762@mail.gmail.com>
Subject: Re: Missing some interrupts
To: Jon Smirl <jonsmirl@gmail.com>
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Cc: linuxppc-dev@ozlabs.org, wael showair <showair2003@yahoo.com>
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On Sat, Jun 6, 2009 at 7:34 AM, Jon Smirl<jonsmirl@gmail.com> wrote:
> On Sat, Jun 6, 2009 at 9:17 AM, wael showair<showair2003@yahoo.com> wrote:
>>
>> Hi All,
>> i have a freescale board, that contains MPC8555 processor & DSP-core
>> there is a GPIO connecting the DSP-core into an input pin of the OpenPIC of
>> the MPC8555 processor.
>>
>> i test one interrupt from the DSP-core to the MPC8555 processor where i
>> configure this interrupt line to be edge-triggered (falling edge) & i
>> receive it successfully
>> but
>> when i generate this interrupt 10 successive times using for loop
>> i just receive 2 interrupts?
>>
>> why can't i receive the 8 other interrupts?
>> i print the value of every irq number inside do_IRQ & i found that i receive
>> the DSP-interrupt just only twice.
>>
>> do u have any suggestions to solve this problem?
>> i want to make sure that i can receive 10 interrupts
>
> Don't do a printk() with interrupts disabled. A printk() takes 1.5ms
> on a mpc5200.

Look at /proc/interrupts instead to see how many IRQs are received.

g.

-- 
Grant Likely, B.Sc., P.Eng.
Secret Lab Technologies Ltd.