Messages in this thread | | | Subject | Re: How to avoid serial port buffer overruns? | From | Paul Fulghum <> | Date | Wed, 16 Aug 2006 17:24:26 -0500 |
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On Wed, 2006-08-16 at 17:12 -0400, Lee Revell wrote: > 2.6.15 and 2.6.16. Here is the .config:
Alan's rework of the receive tty buffering went into 2.6.16 and cured some problems, but clearly not yours. Some more adjustments are in 2.6.18-rc4, so that would be interesting to try for diagnosing this.
I was wondering if the problem was interrupt latency, the tty receive buffering, or something totally different. I don't know if your problem and Raphael's are caused by the same mechanism. I would still like to know which kernel versions he has tried.
Does the MIDI device using the standard N_TTY line discipline? Are you using the low_latency flag on the serial device? What type of UART has been tested (16550? other?) Are you seeing overruns or just lost data?
Thanks, Paul
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