On 10/02/2021 21:36, Gedare Bloom wrote:
On Wed, Feb 10, 2021 at 10:57 AM Joel Sherrill <j...@rtems.org
<mailto:j...@rtems.org>> wrote:
Hi
The minimum sample is intended to show how to construct the
minimum footprint RTEMS application. I suspect that with
Sebastian's recent work on static allocation and reducing
footprint, the minimum sample may be able to benefit from tweaking.
I just checked rtl22xx_t and it is < 16K code and 272 bytes of
data. :)
Hello tends to be in the 64K range. Perhaps a static allocation
hello variant.
Just wanting users to have good examples. A discussion at the
Flight Software Workshop mentioned RTEMS was big but it doesn't
seem to be if you look at executables which reflect those minimum
feature sets.
Hoping Sebastian has magic settings to apply so these numbers are
as good as possible.
This is a good idea. A "useful" minimum configuration with static
objects, or maybe even a couple of them, could be helpful to identify
reasonable bottom ends of the spectrum we can conceivably support.
For the pre-qualification project we have to deliver some resource usage
information. We would like to provide some benchmark programs and some
rules to estimate the resource usage based on configuration options.
Example benchmark programs:
1. one one task with an infinite loop, no clock driver
2. one one task with an infinite loop, with clock driver
3. 2. + create a second task
4. 3. + send/receive events
5. 3. + sem obtain/release
6. 3. + msg send/receive
7. 3. + barrier wait/release
...
Print sizeof(obj) for various objects.
--joel
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