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libserial-newlnx: ASYNC_LOW_LATENCY patch reverted Reports from Das Signal indicate that loadtools performance on Debian is about the same as on Slackware, and that including or omitting the ASYNC_LOW_LATENCY patch from Serg makes no difference. Because the patch in question does not appear to be necessary, it is being reverted until and unless someone other than Serg reports an actual real-world system on which loadtools operation times are slowed compared to the Mother's Slackware reference and on which Slackware-like performance can be restored by setting the ASYNC_LOW_LATENCY flag.
author Mychaela Falconia <falcon@freecalypso.org>
date Thu, 27 Feb 2020 01:09:48 +0000
parents 9354a4f83fe8
children
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A pair of little ad hoc programs has been been added to FreeCalypso host tools
for the purpose of dumping the Calypso chip's internal DSP mask ROM.  These two
programs are the dspdump target utility (see Target-utils) and the fc-dspromdump
front end host tool built in the loadtools suite.  This addition is being
documented here for the sake of completeness, but it is not expected that anyone
will ever need to use these DSP ROM dump tools.  Instead our fc-dspromdump tool
was written so it could be run exactly 3 times:

* Our new tool was run once against a common DSP 3606 target to verify that it
  produces exactly the same output as the old tool implemented a decade ago by
  our political rivals over at OsmocomBB, the dsp-rom-3606-dump.txt output that
  has been published on our FTP site since 2017.  The test result is yes, our
  new tool produces exactly the same dump output when run against the same DSP
  ROM version.

* Our fc-dspromdump tool was then run two more times against less common DSP ROM
  versions: it was run on a D-Sample C05 board and an FCDEV3B-751774 board,
  producing our newly published dumps of Calypso DSP ROM versions 3311 and 3416,
  respectively.

We have now collected and published all 3 DSP ROM versions that are known to
have been featured in the evolutionary history of our beloved Calypso chip:
3311, 3416 and 3606.  Because our target-utils and loadtools frameworks are
quite specific to Calypso and there are no other Calypso DSP ROM versions
besides the 3 which we've already collected and published, it is unlikely that
anyone else will need to run our DSP ROM dump tools as they stand.  But if
anyone is interested in exploring some other TI DBB chips that came before or
after Calypso and is prepared to do the necessary work, our DSP ROM dump tools
might have some use as a starting point.