RE: Non-blocking read too slow on file/serial stream

2007-10-04 Thread Dave Korn
On 04 October 2007 16:02, Jesús wrote: > dear all, > > I am doing a 'read' operation on a non-blocking FILE stream attached to > the serial port. > Every non-empty read (about 120 bytes) is performed in less than 200 us. > However, if no data in buffer, read returns -1 but the operation takes > 1

Non-blocking read too slow on file/serial stream

2007-10-04 Thread Jesús
dear all, I am doing a 'read' operation on a non-blocking FILE stream attached to the serial port. Every non-empty read (about 120 bytes) is performed in less than 200 us. However, if no data in buffer, read returns -1 but the operation takes 1500 us or more in average. Too much for my applica