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Download speed is lower under DDD
From: |
leonp |
Subject: |
Download speed is lower under DDD |
Date: |
Tue, 13 Nov 2001 10:50:47 +0200 |
Hello, all.
In my Linux RH7.1 machine I use BDM target, which is a unit connected
to the
parallel port of PC and GDB controls it via direct access to the port's HW,
mainly setting/polling the corresponding I/O bits (no interrupts in use). The
corresponding gdb driver may be found at http://bdm4gdb.sourceforge.net.
When I use the "pure" GDB without DDD, my program download speed is
about
150Kb/s. But when the same operation is done from inside DDD (both 3.3 and
3.2.1) the speed appears to be about 75Kb/s.
Calling 'top' program during download shows that the CPU time is almost
equally divided between GDB and DDD, while both together utilize 95% of the
CPU time.
Is somebody able to explain what is DDD doing during the download time,
when
I thought it is supposed to wait silently for the end of GDB operation?
Many thanks ahead.
P.S. Please, answer to my e-mail address. Excuse me for coding it, but I see
many junk mails on the list...
--
Leon Pollak
leonp 'at' plris 'point' com
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