On Wed, Jun 19, 2019 at 10:47 PM Subhashini Rao Beerisetty <subhashbeerisetty@xxxxxxxxx> wrote:
Hi All,
I’ve two Linux systems, I tried to measure how long
wait_for_completion_interruptible_timeout() blocked after completion
is signaled by complete() call. I noticed two different results in
both systems.
In one system I noticed this duration in between 10 to 60 micro
seconds, where as in other system it is in between 20 to 500 micro
seconds. I’d like to know what factors can affect this latency? Also,
is there any solution to reduce this latency?
This is a problem which is fixed by RT Linux patches.
It is taking time as Linux is not RTOS and scheduler took time to put your task in running state which is expected and depends on many factors: such as load, interrupts and so on.
Thanks,
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