Devito

API

- dsl: Removed dynamic classes for AbstractFunctions (fixes memory leaks seen by some users) FabioLuporini (2190)
- api: Fix symbolic coefficients for cross derivatives mloubout (2185)
- api: Allow parametric par-tile as input FabioLuporini (2168)
- api: Use subs for origin in the case where index is a function mloubout (2120)
- compiler: Add utility function to normalize sympy arguments FabioLuporini (2125)

Examples

- Examples: Free surface for coupled TTI equations ofmla (2173)

Compiler

- compiler: Keep -qopenmp by default after icx 2023.2 georgebisbas (2164)
- compiler: Add opkwargs property to ArgumentsMap ccuetom (2142)
- compiler: Misc compiler fixes and improvements -- part II FabioLuporini (2138)
- compiler: Pass operator arguments to downstream operators ccuetom (2139)
- compiler: Improve lowering of IndexDerivatives FabioLuporini (2112)
- compiler: Misc compiler tweaks and improvements FabioLuporini (2136)
- compiler: Avoid generating collapse(1) FabioLuporini (2129)
- compiler: Patch pickling of GuardFactor and reconstruction FabioLuporini (2126)
- compiler: Introduce gpu-create parameter for buffers initialized on device ccuetom (2107)
- compiler: Change tile use in DeviceAcczier to allow multiple tile sizes gpc1064 (2095)
- compiler: Add host-*-pin handles; more volatile with pthreads FabioLuporini (2116)
- compiler: Support template parameters FabioLuporini (2105)

MPI

- mpi: Instrument compute0 core after specialising as ComputeCall georgebisbas (2143)
- mpi: Enhance flexibility for custom topologies georgebisbas (2134)
- mpi: Packed gathers and scatters FabioLuporini (2109)

GPU

- compiler: Change tile use in DeviceAcczier to allow multiple tile sizes gpc1064 (2095)

Architectures and JIT

- compiler: Enable AVX512 compiler support when available. ggorman (2184)
- arch: Correct `march` to `mcpu` for ppc raminammour (2174)
- misc: Add deviceid to configuration and enhance switchconfig ccuetom (2175)
- arch: Add ICX support georgebisbas (2051)

🐛 Bug Fixes

- dsl: Removed dynamic classes for AbstractFunctions FabioLuporini (2190)
- dsl: Prevent aggregation for symbolic coefficients mloubout (2182)
- api: Prevent factorization for symbolic coefficients mloubout (2179)
- compiler: Prevent Eq dims to be lost if only implicit mloubout (2169)
- compiler: Fix non-arithmetic distances mloubout (2165)
- compiler: Prevent adding breaking guard to nokey mloubout (2160)
- compiler: Add guards to prevent OOB when streaming buffers with ConditionalDimension ccuetom (2150)
- compiler: Fix CondDim's factor auto-override FabioLuporini (2154)
- compiler: Fix pickling of aliasing SparseFunction FabioLuporini (2148)
- compiler: Revert "compiler: Relax WaitLock regions in a ScheduleTree" FabioLuporini (2141)
- compiler: Patch pickling of GuardFactor and reconstruction FabioLuporini (2126)
- compiler: Fix OpenMP reductions in tandem with linearize=True FabioLuporini (2117)

Testing

- misc: fix openmp= deprecation mloubout (2186)
- Removing AWS ondemand gh-runners from CI ggorman (2155)

Continuous Integration

- CI: pytest setup fix mloubout (2177)
- docker: add some tweaks to Nvidia docker mloubout (2171)
- CI: Fix asv setup mloubout (2167)
- CI: Fix asv devito install mloubout (2166)
- ci: Add python 3.11 and minor CI fixing georgebisbas (2158)
- docker: revamp base deployment mloubout (2162)
- ci: switch to concurrency settings rather than extra action mloubout (2119)

Installation

- docker: Add intel advisor to icx image mloubout (2180)
- docker: Add some tweaks to nvidia docker mloubout (2171)
- docker: Switch to intelpython for icc/icx build mloubout (2172)
- docker: Revamp base deployment mloubout (2162)
- pip prod(deps): update distributed requirement from <2023.7 to <2023.8 dependabot (2161)
- pip prod(deps): update anytree requirement from <=2.8,>=2.4.3 to >=2.4.3,<=2.9.0 dependabot (2152)
- pip prod(deps): update distributed requirement from <2023.6 to <2023.7 dependabot (2145)
- pip prod(deps): update distributed requirement from <2023.5 to <2023.6 dependabot (2127)
- deps: sympy 1.12 compat mloubout (2123)
- pip prod(deps): update distributed requirement from <2023.4 to <2023.5 dependabot (2118)
- reqs: Move pyrevolve to optionals and introduce testing-only reqs georgebisbas (2096)
- reqs: Fix for matplotlib >=3.6.3 georgebisbas (2047)
- install: Make mpi4py portable across Intel and AMD FabioLuporini (2115)
- install: Overhaul Dockerfile.amd for MPI support FabioLuporini (2104)
- pip prod(deps): update distributed requirement from <2023.4 to <2023.5 dependabot (2110)
- pip prod(deps): update ipyparallel requirement from <8.6 to <8.7 dependabot (2106)

New Contributors
* gpc1064 made their first contribution in https://github.com/devitocodes/devito/pull/2095
* raminammour made their first contribution in https://github.com/devitocodes/devito/pull/2174

**Full Changelog**: https://github.com/devitocodes/devito/compare/v4.8.1...v4.8.2

Changes

Examples

- Examples: tweaked userapi free surface notebook to use MPI-safe implementation EdCaunt (1952)

Compiler

- compiler: Revamp compilation of halo exchanges FabioLuporini (2089)
- compiler: Do block with partial data reuse FabioLuporini (2094)
- compiler: Relax _mark_overlappable FabioLuporini (2069)

Architectures and JIT

- compiler: only use offloading flags for amd gpu not cpu mloubout (2087)
- arch: Support aws graviton mloubout (2080)

🐛 Bug Fixes

- compiler: Patch loop nests a-la PrecomputedInterpolation FabioLuporini (2102)
- compiler: Prevent topofusion of homogeneous sync Clusters FabioLuporini (2099)
- compiler: Patch local-SubDim heuristic for blocking FabioLuporini (2093)
- compiler: Fix and improve MIN/MAX codegen FabioLuporini (2076)
- symbolics: evaluate transpose on elements of tensors in case of deriv… mloubout (2072)
- compiler: Handle IndexedBase DDA across Jumps/Barriers FabioLuporini (2070)

Testing

- tests: Fix warnings georgebisbas (2079)

Continuous Integration

- ci: make aws ci parallel mloubout (2085)
- tests: Fix warnings georgebisbas (2079)
- arch: Support aws graviton mloubout (2080)

Installation

- pip prod(deps): update ipyparallel requirement from <8.5 to <8.6 dependabot (2090)
- docker: Updating AMD dockerfile to use Ubuntu 22.04. ggorman (2084)
- pip prod(deps): update distributed requirement from <2023.3 to <2023.4 dependabot (2074)

Changes

misc

- Updated contact information in the Code of Conduct. ggorman (2038)

API

- symbolics: use devito floor instead of Undefined Function mloubout (2052)
- api: Add dimension-wise summing builtin and tests mloubout (1989)

Examples

- Examples: Add Darcy flow example sashaowen (1998)
- examples: Add shallow water equations notebook AtilaSaraiva (1867)
- examples: invoke tti example with --constant argument ofmla (1914)

Documentation

- docs: Update compiler summary image georgebisbas (2037)
- misc: Update docker/README.md FabioLuporini (1972)
- Update FAQ.md FabioLuporini (2010)
- misc: Add FAQ page (lifted from the wiki) FabioLuporini (1976)

Compiler

- compiler: Patch data dependencies across Jumps FabioLuporini (2065)
- compiler: Implement graceful lowering of derivatives (aka "unexpansion") FabioLuporini (2060)
- compiler: Switch from aomp to clang for amd mloubout (2058)
- compiler: Extensions for parlang backends FabioLuporini (2042)
- compiler: Introduce int32 mode FabioLuporini (2041)
- compiler: Support shared memory in parlang backends FabioLuporini (2025)
- compiler: support for HPE Cray Clang compiler georgebisbas (2029)
- compiler: Better blocking heuristics and revamped linearization FabioLuporini (2020)
- compiler: Further misc improvements FabioLuporini (2012)
- compiler: Misc refactorings towards serialization support FabioLuporini (2009)
- Misc code generation improvements FabioLuporini (2001)
- compiler: Misc code generation fixes FabioLuporini (1994)
- compiler: Misc tweaks for backend-portable code generation FabioLuporini (1984)

MPI

- return slice(0,-1) for glb_slices if glb_numb empty on an mpi rank deckerla (2004)
- mpi: Fix data distribution bugs [part 2] rhodrin (1949)
- compiler: Fix MPI mode diag2 does not need a MPIRegion mmohrhard (1992)

Architectures and JIT

- arch: Add gcc 12 into legal configurations ziyiyin97 (2027)

🐛 Bug Fixes

- compiler: Add cluster guard to AliasKey for safety mloubout (2045)
- dependencies: sympy 1.11 compatibility mloubout (2005)
- ci: Add Arm skip option to tests mloubout (2035)
- compiler: Ensure order invariance of candidates in ReducerMap.unique ccuetom (2033)
- compiler: Fix subdim argument mismatch mloubout (2019)
- symbolics: Fix absolute value warning for integer input mloubout (2018)
- types: Minor fixes to sparse function indices and implicit dims mloubout (2011)
- compiler: Patch placement of ConditionalDimension with multi-Dimension conditions FabioLuporini (2008)
- compiler: Prevent reordering of existing temps in CSE mloubout (2002)
- return slice(0,-1) for glb_slices if glb_numb empty on an mpi rank deckerla (2004)
- mpi: Fix data distribution bugs [part 2] rhodrin (1949)
- dsl: Patched cross-derivative fd_order bug EdCaunt (1988)
- compiler: Check jit_dir existence when saving GlassOfWhiskey (1983)

Testing

- ci: Remove docker pruning from pytest-gpu FabioLuporini (2013)

Continuous Integration

- docker: add AMD HIP build to base docker mloubout (2055)
- CI: switch macos runner to latest gcc version mloubout (2046)
- ci: improve accuracy of codecov. ggorman (2040)
- ci: Streamlining ggorman (2028)
- ci: Remove dangling docker layers FabioLuporini (2017)

Installation

- pip prod(deps): update distributed requirement from <2023.2 to <2023.3 dependabot (2063)
- compiler: Switch from aomp to clang for amd mloubout (2058)
- docker: Switch to rocm 4.5.2 mloubout (2057)
- docker: add AMD HIP build to base docker mloubout (2055)
- pip prod(deps): update distributed requirement from <2022.13 to <2023.2 dependabot (2048)
- dependencies: sympy 1.11 compatibility mloubout (2005)
- pip prod(deps): update distributed requirement from <2022.12 to <2022.13 dependabot (2039)
- pip prod(deps): update distributed requirement from <2022.11 to <2022.12 dependabot (2031)
- pip prod(deps): update py-cpuinfo requirement from <=8 to <10 dependabot (2026)
- misc: Add packages to Docker base images FabioLuporini (2030)
- pip prod(deps): update distributed requirement from <2022.10 to <2022.11 dependabot (2021)
- pip prod(deps): update distributed requirement from <2022.9 to <2022.10 dependabot (1996)
- pip prod(deps): update distributed requirement from <2022.8 to <2022.9 dependabot (1987)

Changes

Continuous Integration

- docker: fix deployment condition mloubout (1985)

Changes

- compiler: Fix checkpoint size when save != None speglich (1906)
- compiler: Revamp generation of implicit equations FabioLuporini (1908)

API

- compiler: Support interpolation with user-provided implicit dims FabioLuporini (1948)
- api: Add op.cinterface for C-level interoperability FabioLuporini (1843)

Examples

- examples: Fix grammar and spelling mistakes in pml example PershingSquare (1930)
- examples: Update MPI tutorial notebook and scripts georgebisbas (1923)
- examples: Use solve instead of by hand derivation mloubout (1879)
- examples: Rename the viscoacoustic equations nogueirapeterson (1869)
- examples: Update attribute names and backend for synthetics notebook EdCaunt (1895)
- examples: Add colab/wsl dependencies to gempy notebook EdCaunt (1866)
- Fix 2D Gzz when sintheta==0 mloubout (1855)

Documentation

- misc: Documentation tweaks FabioLuporini (1853)
- misc: Add citation button georgebisbas (1848)

Compiler

- compiler: Generalize lowering of reductions FabioLuporini (1980)
- compiler: Restructure basic.Object sub-hierarchy FabioLuporini (1977)
- compiler: Infer type generation from _C_ctype FabioLuporini (1971)
- compiler: Reuse twin elemental functions FabioLuporini (1967)
- compiler: Support for MPI+CUDA FabioLuporini (1965)
- compiler: Remove IndexedData.free_symbols hack FabioLuporini (1958)
- compiler: Decouple pthreading pass from orchestration FabioLuporini (1938)
- compiler: Inception of two-stage derivative evaluation FabioLuporini (1893)
- compiler: Misc compiler improvements FabioLuporini (1912)
- compiler: Uncache data carriers FabioLuporini (1913)
- compiler: Misc minor code generation fixes FabioLuporini (1891)
- compiler: Minor FD refactorings FabioLuporini (1875)
- compiler: Minor blocking.py refactorings georgebisbas (1845)
- compiler: Avoid generating unnecessary conditionals FabioLuporini (1880)
- compiler: Move derivative.evaluate FabioLuporini (1872)
- compiler: Drop unnecessary check_indices FabioLuporini (1871)
- compiler: Add GuardOverflow FabioLuporini (1870)
- compiler: Flip par-tile unrolling FabioLuporini (1868)
- compiler: Relax Data.__array_finalize__ to work with subclasses FabioLuporini (1865)
- compiler: Add SEPARABLE property FabioLuporini (1840)

MPI

- mpi: Fix data distribution bugs [part 1] rhodrin (1947)
- mpi: Always generate MPIComm with MPI enabled FabioLuporini (1905)
- mpi: Do not send padding region when doing pythonland halo exchange tjb900 (1874)

GPU

- install: Create scheduled base docker images for better build mloubout (1946)
- [gpu] Update to HPC SDK 22.2 and CUDA 11.6 kenhester (1842)

Architectures and JIT

- arch: Support OpenMP on Apple M1 mloubout (1931)
- compiler: Drop ARM specialization FabioLuporini (1882)
- arch: Fix CustomCompiler instantiation AtilaSaraiva (1850)
- arch: Add lineinfo compiler flag FabioLuporini (1849)

🐛 Bug Fixes

- compiler: Patch premature lowering of EvalDerivative FabioLuporini (1979)
- mpi: Fix data distribution bugs [part 1] rhodrin (1947)
- api: Fix Derivative substitution mloubout (1942)
- compiler: Patch fission (issue 1921) FabioLuporini (1922)
- compiler: Patch buffer initialization FabioLuporini (1916)
- compiler: Patch generate_implicit for corner cases FabioLuporini (1910)
- compiler: Patch race conditions due to storage-related dependencies FabioLuporini (1903)
- compiler: Patch iteration space scheduling FabioLuporini (1898)
- compiler: Fix guards fusion FabioLuporini (1883)
- compiler: Do not evaluate unevaluable expressions mloubout (1878)
- compiler: Patch norm accumulation FabioLuporini (1864)
- compiler: Patch norm enforcing double precision accumulation FabioLuporini (1861)
- compiler: Use long, not unsigned int, for linearization FabioLuporini (1841)

Benchmarking

- compiler: Add blockrelax tests and refresh advisor profiling georgebisbas (1929)

Testing

- tests: Refactor conftest skipif names georgebisbas (1960)
- install: Create scheduled base docker images for better build mloubout (1946)
- tests: Add MFE for issue 1753 georgebisbas (1873)
- CI: prevent conflict with pytest mloubout (1844)

Continuous Integration

- install: Update to intel-oneapi-mpi-devel georgebisbas (1961)
- install: Create scheduled base docker images for better build mloubout (1946)
- ci: Hotfix for actions-gh-pages georgebisbas (1937)
- ci: Hotfix actions-gh-pages georgebisbas (1936)
- ci: Update several GitHub actions versions georgebisbas (1934)

Installation

- install: Patch Dockerfile.nvidia FabioLuporini (1975)
- docker: Fix docker tags for publish mloubout (1982)
- install: Add more base images to Docker.nvidia FabioLuporini (1974)
- install: Reinstate libgl1-mesa-glx georgebisbas (1966)
- install: Add lib/intel64_lin georgebisbas (1963)
- install: Refactor Intel paths georgebisbas (1962)
- pip prod(deps): update ipyparallel requirement from <8.4 to <8.5 dependabot (1945)
- pip prod(deps): update distributed requirement from <2022.7 to <2022.8 dependabot (1955)
- install: Create scheduled base docker images for better build mloubout (1946)
- docker: Hotfix Dockerfile.nvidia georgebisbas (1940)
- gpu: Update to HPC 22.3, reduced image size kenhester (1918)
- pip prod(deps): update distributed requirement from <2022.6 to <2022.7 dependabot (1935)
- deps: Drop deprecated distutils imports georgebisbas (1899)
- pip prod(deps): update distributed requirement from <2022.5 to <2022.6 dependabot (1917)
- pip prod(deps): update distributed requirement from <2022.4 to <2022.5 dependabot (1894)
- CI-Docker: Publish CPU image with tag latest navjotk (1890)
- pip prod(deps): update distributed requirement from <2022.3 to <2022.4 dependabot (1884)
- sympy: new version compat mloubout (1858)
- install: Fix cflag for nvidia mpi4py mloubout (1854)
- install: Fix EOL typo mloubout (1852)
- Installation: update setup.py and cleanup docker files mloubout (1847)
- pip prod(deps): update distributed requirement from <=2022.2 to <2022.3 dependabot (1851)

Changes

Documentation

- misc: update pypi georgebisbas (1837)

Compiler

- compiler: Augment code generation capabilities for CUDA/HIP/SYCL support FabioLuporini (1828)

GPU

- gpu: Adding DPCPP compiler support reguly (1836)

🐛 Bug Fixes

- compiler: Patch linearization pass FabioLuporini (1839)