Messages in this thread | | | Date | Thu, 17 Aug 2006 00:10:33 +0100 | From | Russell King <> | Subject | Re: How to avoid serial port buffer overruns? |
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On Wed, Aug 16, 2006 at 05:24:26PM -0500, Paul Fulghum wrote: > 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?
MIDI uses its own driver - sound/drivers/serial-u16550.c. My guess is there's something in the system starving interrupt servicing. Serial is very sensitive to that, and increases in other system latencies tends to have an adverse impact on serial.
-- Russell King Linux kernel 2.6 ARM Linux - http://www.arm.linux.org.uk/ maintainer of: 2.6 Serial core - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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