At about the time of 2/15/2007 12:14 AM, Peter Jeremy stated the following: > On 2007-Feb-14 00:27:36 -0800, Daniel Rudy <[EMAIL PROTECTED]> wrote: >> Changing the slot did help. I moved it from slot 3 to slot 1. But, now >> it's dropping characters with a port speed of 57600, and I am also >> getting irq overrun errors from the kernel too now. > > This is not good. Interrupt latency is a bit of a sore point but the > FIFO trigger level is 8 bytes so getting SILO overflows implies a > latency of >1.38msec. Does sio4 report as [FAST] in the dmesg? > > Unfortunately, there's no easy way to change the FIFO trigger level - > you would need to patch the source code (look for FIFO_RX_MEDH in > /usr/sys/dev/sio/sio.c if you want to go down this path). > >> With a port speed of 2400, I do not drop characters. > > The FIFO is not enabled at speeds at or below 4800bps. >
I have tried several combinations of settings where the < 4800 was, I even disabled the FIFO, but I still have the same problem: silo overflows. Is there a way for force the driver to attach as fast since it's not doing it? -- Daniel Rudy _______________________________________________ freebsd-hackers@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to "[EMAIL PROTECTED]"
