Low latency serial communication on Linux

Question

I\'m implementing a protocol over serial ports on Linux. The protocol is based on a request answer scheme so the throughput is limited by the time it takes to send a packet

Answer 1

Having talked to to some more engineers about the topic I came to the conclusion that this problem is not solvable in user space. Since we need to cross the bridge into kernel land, we plan to implement an kernel module which talks our protocol and gives us latencies < 1ms.

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Turns out I was completely wrong. All that was necessary was to increase the kernel tick rate. The default 100 ticks added the 10ms delay. 1000Hz and a negative nice value for the serial process gives me the time behavior I wanted to reach.