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

Here's what setserial does to set low latency on a file descriptor of a port:

ioctl(fd, TIOCGSERIAL, &serial);
serial.flags |= ASYNC_LOW_LATENCY;
ioctl(fd, TIOCSSERIAL, &serial);