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On Sat, Mar 20, 2010 at 12:02 PM, David Relson <relson@×××××××××××××.com> wrote: |
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<snip> |
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> Even with a dedicated thread, the program is still receiving multiple |
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> characters per read. Calculating average and maximum byte counts for |
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> each 10,000 reads, I've often seen maximums of 150 and have never seen |
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> an average under 12. These numbers occur with VMIN=1 and VTIME=0. |
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> |
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> Is there a setting so that the serial port driver will release |
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> characters sooner (rather than later)? |
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<snip> |
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Wasn't involved in the other thread, so my apologies if this has |
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already been answered/stated, but are you using the realtime kernel |
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patches? If you run RT-Preempt, then you can set the priority of the |
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kernel thread that is handling the serial interrupt high than all the |
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other kernel threads, which should improve your latencies... See |
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https://rt.wiki.kernel.org/index.php/Main_Page for more info. |
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HTH- |
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|
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James |
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> Regards, |
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> |
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> David |
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> |
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> |
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