Timing of ISR

Kernel
1

nobody wrote on Wednesday, September 20, 2006:

I have a problem, I use a queue in an ISR, which starts a task with the highest priority. When I give  the interrupt for free, the ISR starts some milliseconds after the event, which is to late!
After 3 or 4 events everything is ok, the ISR starts after some  microseconds.
I use a LPC2119.
The interrupt has the second highest priority.
The highest is the timer for the os tick.

Maybe someone can help me?
 

2

nobody wrote on Wednesday, September 20, 2006:

Do you mean the ISR starts some milliseconds after some event - or that the task start some milliseconds after the ISR?

If the former, then are you keeping interrupts disabled for too long anywhere in your code?