Hi,
I have a machine that puts several interrupts on one interrupt
line. As these are generally headless embedded machines bought
and installed by the customer, it is a bit problematic to tweak
the BIOS to assign them in an optimal way.
Now I am seeing latencies such as
Wakeup shared prio
385 50 638 (0) irq/15-eth1 <- 28 50 irq/15-ata_piix 5147.373113
#Minimum latency: 1 microseconds
#Average latency: 4 microseconds
#Maximum latency: 638 microseconds
I don't care about the ATA, but eth1 is important. Is it
enough to adjust the priorities of the kernel threads
or are shared interrupts generally a recipe for problems
in the RT_FULL world?
If there is any docs discussing the principles of interrupt
handling in a RT kernel, I'd appreciate a pointer.
Thanks
--
Stano
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