diff doc/Loadtools-performance @ 611:c847d742ab38

doc/Loadtools-performance: article started
author Mychaela Falconia <falcon@freecalypso.org>
date Mon, 24 Feb 2020 21:44:13 +0000
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+Here are the expected run times for the flash dump2bin operation of dumping the
+entire flash content of a Calypso GSM device:
+
+Dump of 4 MiB flash (e.g., Openmoko GTA01/02 or Mot C139/140) at 115200 baud:
+12m53s
+
+The same 4 MiB flash dump at 812500 baud: 1m50s
+
+Dump of 8 MiB flash (e.g., Mot C155/156) at 812500 baud: 3m40s
+
+Because of the architecture of fc-loadtool and its loadagent back-end, the run
+time of a flash dump operation depends only on the serial baud rate and the
+size of the flash area to be dumped; it should not depend on the USB-serial
+adapter type or any host system properties, as long as the host system and
+serial adapter combination supports the desired baud rate.  In contrast, flash
+programming and fc-xram loading operations are quite different in that their
+run times do depend on the host system and USB-serial adapter or other serial
+port hardware - this host system dependency exists because of the way these
+operations are implemented in our architecture.
+
+[To be continued]