Add CHANGELOG.md
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# Changelog
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All notable changes to this project will be documented in this file.
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The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
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and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
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## [Unreleased]
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### Added
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- Add this CHANGELOG.md file to keep track of changes.
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### Fixed
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- Don't rely on /tmp or $TMPDIR in tests.
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## [1.2.1] - 2022-07-25
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### Fixed
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- Set default visibility to hidden to prevent clashes with other functions such
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as the verr() in the glibc.
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- Don't hardcore destination directory names like lib, to use the ones in the
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destination host (like lib64).
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- Add support in ovnisort for cases where in the sorting region there are flush
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events.
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- Remove CI nix roots from the builds to allow the garbage collector to remove
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the build.
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- Fix the detection of the -fompss-2 flag in cmake by setting the flag at link
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time too.
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- Fix spawn task test by waiting for the task to finish before exiting.
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## [1.2.0] - 2022-05-02
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This version adds the initial support for the breakdown view and some fixes.
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### Added
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- Add the initial breakdown view showing the task type, the subsystem or the
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idle state.
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- Added the sort module for channels to support the breakdown view.
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- Add the -b option in ovniemu to enable the breakdown trace.
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- Add support for sponge CPUs in Nanos6.
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- Add the cmake option `-DUSE_MPI=OFF` to build ovni without MPI.
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- Add a test for two nOS-V shared memory segments.
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### Fixed
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- Sort the timeline rows in MPI rank order if given.
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- Skip duplicated entries when ovnisync to runs multiple times in the same node.
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- Allow tasks to be re-executed to support the taskiter in the nOS-V model.
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- Use the signed `int64_t` type for clock offsets, so they can be negative.
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- Avoid fmemopen() due to a bug in old glibc versions.
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- Fix clang format for braced list
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- Fix buffer overflow in `sort_replace()` of the sort module.
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- Set the size of the channel property arrays to prevent a buffer overflow.
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## [1.1.0] - 2022-03-24
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This version introduces the patch bay and a big redesign in the way the channels
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are used along with some other changes.
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### Changed
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- The channels are now connected using the patch bay, where they must be
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registered using an unique name.
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- The tracking modes are implemented by using a mux, and an arbitrary way of
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tracking other channels is now possible, as it is required for the breakdown
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model.
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- The channels don't have visibility with other parts of the code, they interact
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with a callback only.
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- The emulator code has been split into smaller modules which are independent of
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each other, so we can unit test them separately.
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- The models are now implemented following the model spec functions.
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- Updated the ovni and Nanos6 models
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- Model data is now stored by the `extend_set`/`get` methods, so it is kept
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separate between models.
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- The CPU and thread channels have been moved to the emulator while the ones
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specific to the user space tracing with libovni.so are controlled by the ovni
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model. This allows other thread/CPU tracing mechanisms (kernel events) to
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update the emulator channels while the other models are not affected.
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- The trace streams are now independent of the hierarchy loom/proc/thread, and
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end with the suffix .obs, so we can add other types of traces in the future.
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- Models can register any arbitrary number of channels on runtime, so we can add
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load hardware counters in one channel each.
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- Channels have a user friendly name so debugging is easier
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- The die() abort mechanism has been transformed into if() + return -1, so we
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can do unit testing and check the errors and also finish the PRV traces when
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the emulator encounters an error and open them in Paraver with the last
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processed event.
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- The emulator can be stopped with ^C, producing a valid Paraver trace.
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- Prevents leaving threads in the running state by adding a check at the end of
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emulation
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- The Paraver configurations files are copied into the trace directory.
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### Removed
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- The TAMPI and OpenMP models have been removed as they are not maintained.
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- Punctual events are not implemented for now.
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- No error states, when more than one thread is running in the virtual
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CPU, no subsystem is shown in the CPU view.
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## [1.0.0] - 2022-12-16
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### Added
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- First ovni release.
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[unreleased]: https://pm.bsc.es/gitlab/rarias/ovni/-/commits/master
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[1.2.1]: https://pm.bsc.es/gitlab/rarias/ovni/-/tags/1.2.1
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[1.2.0]: https://pm.bsc.es/gitlab/rarias/ovni/-/tags/1.2.0
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[1.1.0]: https://pm.bsc.es/gitlab/rarias/ovni/-/tags/1.1.0
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[1.0.0]: https://pm.bsc.es/gitlab/rarias/ovni/-/tags/1.0.0
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