3.0 Changelog
From ChronOS Linux
(Difference between revisions)
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** 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. | ** 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). | * 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). | ||
| + | * Converted all scheduler-managed lists to Linux's 'struct list_head' style lists, and added '#define' constants for referencing them by name. | ||
| + | * United the initialization of the /proc/chronos/ entries, so that directory is guaranteed to always be created, and made /proc/chronos/schedulers always available, even if scheduling statistics are not enabled. | ||
==Userspace== | ==Userspace== | ||
Revision as of 15:36, 28 January 2012
Changes made between Beta 2.8 and 3.0.
Kernel
- 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).
- Converted all scheduler-managed lists to Linux's 'struct list_head' style lists, and added '#define' constants for referencing them by name.
- United the initialization of the /proc/chronos/ entries, so that directory is guaranteed to always be created, and made /proc/chronos/schedulers always available, even if scheduling statistics are not enabled.
Userspace
- 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)
