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SubjectNo Interrupt latency but too many interrupts
Date
I am looking since weeks for the source of the stuttering PPP and SLIP
performance and I guess I found something.

I observed that my system still has a load of 0.30 when totally idle
so I had a look at the interrupts and although the serial port
was not in use there were still a couple of hundred interrupts
per second.

How could the serial port generate so many interrupts while not in use?

Were there any modifications to the serial driver lately?



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