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DM37 interrupt latency issue

Konstantin Primenko
Intellectual 260 points
Other Parts Discussed in Thread: DM3730

We have a DM3730 board. And Linux kernel 3.3.7. We need rs485 on UART3, so we patched kernel with this patch

http://comments.gmane.org/gmane.linux.serial/6333. Now we have a problem. When we starts Qt QWS app UART Interrupt occurs with latency up to 50-60ms. Moreover if we press <Ctrl>+<Alt>+<F2>(change terminal) then latency drops to 2-3ms. After press <Ctrl>+<Alt>+<F1> latency again grows.

What is the problem?

  • 0
    TI__Guru**** 161600 points

    Hi,

    Your question is out of the scope of OMAP Applications Processors Forum.

    Could you please post in the dedicated DM37x DaVinci Video Processor Forum: http://e2e.ti.com/support/dsp/davinci_digital_media_processors/f/537.aspx

    Folks there are more familiar with DM37x architecture & SDK.

    Best Regards,

    Yordan