3.0 Changelog

(Difference between revisions)

Revision as of 15:30, 21 January 2012

Changes made between Beta 2.8 and 3.0.

Moved from kernel version 2.6.33.9 to 3.0.17, and updated to the 3.0.17-rt33 version of the PREEMPT_RT patch.
Fixed several bugs resulting from changes made between the 2.6.33.9 and 3.0.17 kernels.
Allow processes to exit gracefully, even if inside a real-time segment.
Ported to ARM architecture.
- Made MCS Lock implementation more generic. This will allow for easier porting of ChronOS to additional platforms. While the current 'generic' implementation is optimized for x86_64, it has been done in a way that encourages optimized architecture-specific versions.
Added DEBUG_CHRONOS config option which adds several checks in the kernel which are useful for debugging (including warning when a ChronOS task blocks inside its RT segment, and when it exits prematurely).

Re-wrote entire sched_test_app for better modularity, portability, and expandability.
- Remove dependence on QT
- Add three timing methods: WCET, average-case, and timer-polling.
- Add array-walk and linked list traversal workloads for memory-intensive testing.
- Improve accuracy of slope-generation mechanism.
Ported to ARM (fixed several overflow and type issues)

@@ Line 7: / Line 7: @@
 * Ported to ARM architecture.
 ** Made MCS Lock implementation more generic. This will allow for easier porting of ChronOS to additional platforms. While the current 'generic' implementation is optimized for x86_64, it has been done in a way that encourages optimized architecture-specific versions.
-* Added DEBUG_CHRONOS config option which adds several checks in the kernel which are useful for debugging.
+* Added DEBUG_CHRONOS config option which adds several checks in the kernel which are useful for debugging (including warning when a ChronOS task blocks inside its RT segment, and when it exits prematurely).
 ==Userspace==