Hello,
there is one aspect with respect to performance limits which is
currently not considered in this proposal:
https://lists.rtems.org/pipermail/devel/2020-November/063213.html
You can run the some BSPs such as sparc/gr712rc on several boards.
However, each board may have different settings which affect the system
performance, for example the CPU frequency, memory controller settings,
memory chips, etc. In the proposal, limits are specified like this:
limits:
sparc/gr712rc:
DirtyCache:
max-upper-bound: 0.000005
mean-upper-bound: 0.000005
FullCache:
max-upper-bound: 0.000005
mean-upper-bound: 0.000005
HotCache:
max-upper-bound: 0.000005
mean-upper-bound: 0.000005
Load/1:
max-upper-bound: 0.00001
mean-upper-bound: 0.00001
Load/2:
max-upper-bound: 0.00001
mean-upper-bound: 0.00001
Load/3:
max-upper-bound: 0.00001
mean-upper-bound: 0.00001
Load/4:
max-upper-bound: 0.00001
mean-upper-bound: 0.00001
This neglects that the limits are subject to a board configuration. One
approach to cover this is the addition of a new BSP provided function:
const char *rtems_get_hardware_performance_hash();
The BSP feeds all performance related data into a hash function and
returns a string encoding (for example a MD5 digest in base64 encoding).
The example from above with the performance hash:
limits:
sparc/gr712rc/XrY7u+Ae7tCTyyK7j1rNww==:
DirtyCache:
max-upper-bound: 0.000005
mean-upper-bound: 0.000005
The test suite could report the performance has and a test output analyser
coudl check that the reported values are in the specified bounds.
--
embedded brains GmbH
Sebastian HUBER
Dornierstr. 4
82178 Puchheim
Germany
email: sebastian.hu...@embedded-brains.de
Phone: +49-89-18 94 741 - 16
Fax: +49-89-18 94 741 - 08
PGP: Public key available on request.
embedded brains GmbH
Registergericht: Amtsgericht München
Registernummer: HRB 157899
Vertretungsberechtigte Geschäftsführer: Peter Rasmussen, Thomas Dörfler
Unsere Datenschutzerklärung finden Sie hier:
https://embedded-brains.de/datenschutzerklaerung/
_______________________________________________
devel mailing list
devel@rtems.org
http://lists.rtems.org/mailman/listinfo/devel
