v4.8.20

Changes

• CI: Cannot set --env CUDA_VISIBLE_DEVICES for docker run when using ng --gpus "device=${CUDA_VISIBLE_DEVICES:-all}" - dropping --env arg. @ggorman (#2710)
• misc: switch to f-string throughout @mloubout (#2706)
• misc: Remove make-pbs.py @FabioLuporini (#2700)
• compiler: Hotfix the memory estimate for certain devices @EdCaunt (#2699)
• misc: Expand derivative touchup @JDBetteridge (#2695)
• misc: Remove decrepit folders @EdCaunt (#2663)
• misc: Switch mpi-x pub to ieee link @georgebisbas (#2688)

API

• dsl: Add an additional Border convenience class for boundary conditions @EdCaunt (#2646)
• compiler: Add a utility to estimate memory usage for an operator @EdCaunt (#2659)
• dsl: Expand derivative @JDBetteridge (#2559)
• misc: Add custom warnings functionality @JDBetteridge (#2692)
• api: fix custom coeffs with cross derivatives @mloubout (#2672)

Examples

• examples: Fix density handling in acoustic @mloubout (#2716)
• Clean notebook metadata @JDBetteridge (#2639)

Documentation

• docs: fix mmin/mmax docstring @mloubout (#2703)
• Clean notebook metadata @JDBetteridge (#2639)

Compiler

• compiler: prevent directions from non indexed @mloubout (#2704)
• compiler: Avoid generating parentheses when not needed @FabioLuporini (#2689)
• compiler: Pass the whole descriptor to buf_reuse cbk @FabioLuporini (#2687)
• compiler: Reapply "Cache Scope + Dependence instances" @enwask (#2677)
• compiler: Cache Scope + Dependence instances @enwask (#2669)
• compiler: fix conditional reductions @mloubout (#2671)
• compiler: fix temp/array alloc @mloubout (#2664)
• mpi: fix allreduce iteration space @mloubout (#2662)
• compiler: Lazy IET visitors + Search @enwask (#2621)
• compiler: add top description to generated file @mloubout (#2652)

MPI

• mpi: Prevent errors with single rank @mloubout (#2698)
• compiler: Fixup MPI over Arrays + arguments overriding @FabioLuporini (#2697)
• data: prevent mpi comm with single rank @mloubout (#2685)
• mpi: fix multi conditional for allreduce @mloubout (#2673)
• mpi: fix in-loop allreduce with multiple reductions @mloubout (#2668)
• mpi: fix allreduce iteration space @mloubout (#2662)

Architectures and JIT

• arch: prevent shell string escape in codepy cmdline strings @mloubout (#2715)

🐛 Bug Fixes

• compiler: Hotfix estimate memory again @EdCaunt (#2707)
• compiler: prevent directions from non indexed @mloubout (#2704)
• compiler: Fixup MPI over Arrays + arguments overriding @FabioLuporini (#2697)
• compiler: Fixup nbytes-avail-mapper @FabioLuporini (#2654)
• compiler: Call set_device in pthreads @FabioLuporini (#2679)
• compiler: Add buf-reuse opt-option and rcompile caching @FabioLuporini (#2674)
• compiler: Fix HaloTouch hashing @FabioLuporini (#2676)
• Revert "compiler: Cache Scope + Dependence instances" @mloubout (#2675)
• mpi: fix multi conditional for allreduce @mloubout (#2673)
• compiler: Fix Bundle.symbolic_shape @FabioLuporini (#2665)
• compiler: Patch IterationSpace.intersection @FabioLuporini (#2647)
• compiler: Patch merge and reduction HaloScheme passes @FabioLuporini (#2645)

Continuous Integration

• compiler: improve rcompile @mloubout (#2719)
• Remove dangling layers. @ggorman (#2686)
• ci: Set CONTAINER_NAME within a step. @ggorman (#2684)
• ci: isolate GPU runners, respect CUDA_VISIBLE_DEVICES, drop global prunes @ggorman (#2680)

Installation

• pip prod(deps): update matplotlib requirement from <3.10.6 to <3.10.7 @dependabot[bot] (#2722)
• pip prod(deps): update cupy-cuda12x requirement from <13.5.2 to <13.6.1 @dependabot[bot] (#2720)
• gh(deps): bump actions/checkout from 4 to 5 @dependabot[bot] (#2709)
• pip prod(deps): update dask-cuda requirement from <25.6.1 to <25.8.1 @dependabot[bot] (#2705)
• install: Remove files and directories not needed for install @JDBetteridge (#2702)
• pip prod(deps): update matplotlib requirement from <3.10.4 to <3.10.6 @dependabot[bot] (#2694)
• pip prod(deps): bump pyrevolve from 2.2.5 to 2.2.6 @dependabot[bot] (#2678)
• pip prod(deps): update distributed requirement from <2025.5.2 to <2025.7.1 @dependabot[bot] (#2666)
• pip prod(deps): update fsspec requirement from <2025.5.2 to <2025.7.1 @dependabot[bot] (#2670)
• pip prod(deps): update cupy-cuda12x requirement from <13.4.2 to <13.5.2 @dependabot[bot] (#2661)
• pip prod(deps): update mpi4py requirement from <4.0.4 to <4.1.1 @dependabot[bot] (#2649)
• deps: Bump upper NumPy version to 2.3.1 @EdCaunt (#2653)
• pip prod(deps): update cgen requirement from <2021,>=2020.1 to >=2020.1,<2026 @dependabot[bot] (#2642)
• pip prod(deps): update pillow requirement from <11.2.2,>11 to >11,<11.3.1 @dependabot[bot] (#2651)
• pip prod(deps): bump pyrevolve from 2.2.4 to 2.2.5 @dependabot[bot] (#2650)
• pip prod(deps): update distributed requirement from <2025.4.2 to <2025.5.2 @dependabot[bot] (#2641)
• pip prod(deps): update scipy requirement from <1.15.3 to <1.15.4 @dependabot[bot] (#2648)
• pip prod(deps): update dask-cuda requirement from <25.4.1 to <25.6.1 @dependabot[bot] (#2644)
• pip prod(deps): update matplotlib requirement from <3.10.2 to <3.10.4 @dependabot[bot] (#2640)

Full Changelog: v4.8.19...v4.8.20

v4.8.19

Drop support for Python 3.9

Changes

Compiler

• compiler: Privilege default par-tile with rcompile @FabioLuporini (#2636)
• compiler: Make cse toposort stable @mloubout (#2633)

🐛 Bug Fixes

• compiler: fix deque pop order @mloubout (#2637)
• compiler: Make cse toposort stable @mloubout (#2633)

Installation

• deps: Drop Python 3.9 @enwask (#2631)

Full Changelog: v4.8.18...v4.8.19

v4.8.18

Changes

Compiler

• compiler: Address various compiler hotspots with operators containing large expression counts @EdCaunt (#2624)

Architectures and JIT

• arch: fix json erro with no card @mloubout (#2620)

🐛 Bug Fixes

• compiler: Revamp MPI hoisting and merging @FabioLuporini (#2629)

Continuous Integration

• ci: Fix pytest regression @enwask (#2623)

Installation

• pip prod(deps): update pytest-cov requirement from <6.1.2 to <6.2.2 @dependabot[bot] (#2632)
• pip prod(deps): update fsspec requirement from <2025.3.3 to <2025.5.2 @dependabot[bot] (#2630)
• deps: Fix pyproject.toml @mloubout (#2628)
• ci: Fix pytest regression @enwask (#2623)

Full Changelog: v4.8.17...v4.8.18

v4.8.17

Drop support for numpy <2, sympy <1.12

Changes

• misc: Purge abc.abstractproperty as it is deprecated @EdCaunt (#2603)
• compiler: Blocked SubDimensions now use root dimension name @EdCaunt (#2600)

API

• api: fix kwargs processing for tensor functions @mloubout (#2604)
• api: Add DEVITO_DEVICE_DEFAULT env var @FabioLuporini (#2597)
• api: revamp subsampling factors to avoid duplicates @mloubout (#2575)

Compiler

• compiler: Add VectorAccess as an internal type @FabioLuporini (#2598)

MPI

• mpi: Fix halo exchanges from BundleViews @FabioLuporini (#2602)

Architectures and JIT

• arch: Improve GPU autodetection @FabioLuporini (#2614)

🐛 Bug Fixes

• arch: Use the node's max memory transaction size @FabioLuporini (#2619)
• mpi: Fix halo exchanges from BundleViews @FabioLuporini (#2602)
• compiler: Fixup factor overriding @FabioLuporini (#2601)
• api: revamp subsampling factors to avoid duplicates @mloubout (#2575)

Installation

• gh(deps): bump docker/setup-qemu-action from 2 to 3 @dependabot[bot] (#2618)
• gh(deps): bump docker/login-action from 2 to 3 @dependabot[bot] (#2617)
• gh(deps): bump release-drafter/release-drafter from 5 to 6 @dependabot[bot] (#2616)
• gh(deps): bump peaceiris/actions-gh-pages from 3 to 4 @dependabot[bot] (#2615)
• install: switch to dynamic version to avoid _version file issue @mloubout (#2613)
• misc: remove unnecessary files with pyproject @mloubout (#2612)
• gh(deps): bump peter-evans/repository-dispatch from 2 to 3 @dependabot[bot] (#2609)
• gh(deps): bump docker/setup-buildx-action from 2 to 3 @dependabot[bot] (#2608)
• gh(deps): bump docker/build-push-action from 3 to 6 @dependabot[bot] (#2607)
• gh(deps): bump docker/metadata-action from 4 to 5 @dependabot[bot] (#2610)
• gh(deps): bump codecov/codecov-action from 4 to 5 @dependabot[bot] (#2606)
• deps: Update minimal for sympy and numpy @mloubout (#2605)
• deps: Add upper bound to all deps to avoid surprises @mloubout (#2596)

Full Changelog: v4.8.16...v4.8.17

v4.8.16

Changes

• misc: Remove spurious rank info when running without MPI @EdCaunt (#2593)

API

• dsl: Add Real, Imag, and Conj operators @EdCaunt (#2564)

Documentation

• misc: Update FAQ.md @FabioLuporini (#2590)

🐛 Bug Fixes

• api: Add retrocompat to is_imaginary for older sympy @mloubout (#2591)

Installation

• deps: upper bound on codepy due to breaking latest @mloubout (#2594)
• api: Add retrocompat to is_imaginary for older sympy @mloubout (#2591)

Full Changelog: v4.8.15...v4.8.16

v4.8.15

Changes

API

• api: Fix staggering setup and tensor rebuilding @mloubout (#2583)
• dsl: Remove useless memory check (already done at alloc time) @FabioLuporini (#2563)
• dsl: ensure SparseFunction coordinates and point symbols are always real @EdCaunt (#2557)

Examples

• examples: Fix norm for space order 4 @ZoeLeibowitz (#2565)

Compiler

• compiler: Improve quality of generated code with Bundles and MPI @FabioLuporini (#2587)
• compiler: Fix issue 2577 - edit printer for unevaluation Mul @ZoeLeibowitz (#2578)
• compiler: Enrich Ops data structure @FabioLuporini (#2576)
• compiler: Allow str cast type @mloubout (#2566)
• compiler: Fix reduction multi_partile @mloubout (#2560)
• compiler: Tweak init_core/halo properties @FabioLuporini (#2558)

MPI

• mpi: Fix correctness of halo exchanges for Bundles @FabioLuporini (#2582)

🐛 Bug Fixes

• compiler: Avoid nvc++ array reductions and add MPI fallback @mloubout (#2589)
• compiler: Fix uxreplace behaviour with numeric expressions @FabioLuporini (#2571)
• compiler: Fix reconstruction/pickling of low level objects @FabioLuporini (#2567)
• compiler: revert broken reduce par_tile @mloubout (#2562)

Testing

• tests: Remove floating point equality assertions @JDBetteridge (#2539)

Continuous Integration

• Update 20.04 runners to 22.04 @JDBetteridge (#2584)
• CI: Ensure docker errors at test failure with codecov @ZoeLeibowitz (#2572)

Installation

• pip prod(deps): update anytree requirement from <=2.12.1,>=2.4.3 to >=2.4.3,<=2.13.0 @dependabot (#2580)
• deps: Add pillow version requirement @mloubout (#2568)

Full Changelog: v4.8.14...v4.8.15

v4.8.14

Changes

• misc: update all link to main @mloubout (#2552)

API

• api: Introduce complex numbers support (np.complex64/128) @mloubout (#2375)

Documentation

• misc: Update advisor with oneAPI 2025 @georgebisbas (#2533)

Compiler

• api: Introduce complex numbers support (np.complex64/128) @mloubout (#2375)
• compiler: Enhance IR for GPU codegen @FabioLuporini (#2555)

🐛 Bug Fixes

• compiler: Fix update_properties @FabioLuporini (#2548)

Testing

• ci: Fix docker codecov @mloubout (#2550)

Installation

• install: Add packaging to requirements @JDBetteridge (#2556)

Full Changelog: v4.8.13...v4.8.14

v4.8.13

Changes

API

• dsl: Introduce ability to define Functions on Subdomains @EdCaunt (#2245)

Compiler

• compiler: fix application visitor for nest Call @mloubout (#2544)

Architectures and JIT

• arch: add missing openmp flag for aomp compiler @mloubout (#2541)

🐛 Bug Fixes

• compiler: Fixup deterministic codegen @FabioLuporini (#2543)

Full Changelog: v4.8.12...v4.8.13

v4.8.12

API

• api: Relax custom coefficient spacing enforcement @mloubout (#2530)
• api: fix backward compatibility of Substitution, missing function check @mloubout (#2522)
• api: Misc fixes for builtins and harmonic averaging @mloubout (#2520)
• api: fix equation pickling @mloubout (#2490)
• api: more robust processing of custom weight with spacing @mloubout (#2489)
• api: fix pickling of sparse operations @mloubout (#2488)
• api: support custom coeffs for div/grad/curl @mloubout (#2486)
• dsl: Add ArgProvider inheritance to AbstractSymbol @EdCaunt (#2482)
• API: Fix Sparse rebuild with explicit empty subfunctions @mloubout (#2473)
• API: revamp cross derivative shortcuts @mloubout (#2458)
• api: revamp custom coefficients API @mloubout (#2434)
• API: Support harmonic averaging for parameter Function @mloubout (#2456)
• dsl: Improve Function rebuilding and use of preexisting arrays as Function data @EdCaunt (#2438)
• api: make sure staggered FD interpolates shifts @mloubout (#2439)
• types: Introduce abstract class LocalType @ZoeLeibowitz (#2433)
• api: Enforce sympy shifts @mloubout (#2471)
• api: fix derivative kwargs at call @mloubout (#2469)

Examples

• api: Misc fixes for builtins and harmonic averaging @mloubout (#2520)
• examples: Fix ADER notebook numbering @EdCaunt (#2450)

Documentation

• docs: Update CITATION.md @georgebisbas (#2499)
• docs: Elaborate on SubDomains for BCs w MPI @georgebisbas (#2491)
• examples: Enhance MPI notebook with paper material @georgebisbas (#2492)
• misc: Update FAQ @EdCaunt (#2481)

Compiler

• compiler: Misc extensions towards supporting thread block clustering @FabioLuporini (#2538)
• compiler: Misc improvements to code generation @FabioLuporini (#2516)
• compiler: fix scalar aliases from conditionals @mloubout (#2517)
• compiler: Rework HaloSpot optimization @georgebisbas (#2477)
• compiler: Expose Bundle's properties correctly @FabioLuporini (#2487)
• dsl: Move SubDimension thickness evaluation to the thicknesses themselves @EdCaunt (#2470)
• compiler: Improve CIRE's cost model @FabioLuporini (#2476)
• compiler: Add missing symbolic casts @mloubout (#2462)
• compiler: Remove counters from subdomains and automatically generate unique names @EdCaunt (#2431)
• compiler: Propagate metadata down to _arg_defaults @FabioLuporini (#2459)
• compiler: Minor tweaks for elastic code gen @FabioLuporini (#2453)
• compiler: Add various performance optimization variants @FabioLuporini (#2446)
• compiler: respect fetch direction @mloubout (#2441)
• dsl: Fix missing sympy assumptions during rebuilding @EdCaunt (#2436)
• compiler: Tweak par-tile unrolling and revamp MPI topology @FabioLuporini (#2426)
• misc: Revamp exception hierarchy @FabioLuporini (#2500)
• compiler: Tweak custom coefficients error handling @FabioLuporini (#2519)
• compiler: Add 'groupby' mode to MapNodes visitor @ZoeLeibowitz (#2502)
• compiler: Fix code generation for pow and fabs when using float32 @JDBetteridge (#2504)

MPI

• compiler: Rework HaloSpot optimization @georgebisbas (#2477)

Architectures and JIT

• arch: Support Grace arm architecture @mloubout (#2537)
• compiler: Support compiler flags for Cortex @georgebisbas (#2531)
• arch: make sure Device get thread config from host @mloubout (#2468)
• arch: Avoid deprecated compiler flags @FabioLuporini (#2461)
• arch: add rpath option to include_dirs @mloubout (#2466)
• arch: fix graviton march @mloubout (#2445)

🐛 Bug Fixes

• api: Fix custom coefficients inlining @FabioLuporini (#2524)
• api: fix backward compatibility of Substitution, missing function check @mloubout (#2522)
• compiler: Fixup pow_to_mul @FabioLuporini (#2518)
• compiler: Fix bug in concretization of conditionals containing Thicknesses @EdCaunt (#2510)
• compiler: Default CustomDimension.local to True @FabioLuporini (#2507)
• misc: Prevent builtins on transient functions @FabioLuporini (#2506)
• compiler: Avoid allocating Bundles on the host if transient @FabioLuporini (#2503)
• compiler: Generate fminf/fmaxf where necessary @FabioLuporini (#2501)
• api: fix alias for buffering @mloubout (#2497)
• api: fix equation pickling @mloubout (#2490)
• compiler: Fixup minor cire-rotate bug @FabioLuporini (#2472)
• API: revamp cross derivative shortcuts @mloubout (#2458)
• compiler: Hotfix and simplify minimize_symbols @FabioLuporini (#2452)
• compiler: Fix handling of modulo 1 for MPI @mloubout (#2451)
• compiler: Patch mapify-reduce for SparseTimeFunctions @FabioLuporini (#2449)
• dsl: Fix missing sympy assumptions during rebuilding @EdCaunt (#2436)
• compiler: Patch indirect ConditionalDimension @FabioLuporini (#2432)
• compiler: fix unevaluation of sparse cluster @mloubout (#2435)
• misc: Fix EnrichedTuple rebuilding @enwask (#2418)
• api: Make Derivative Reconstructable @mloubout (#2429)
• misc: Fix operator output with gflopss=None @FabioLuporini (#2496)
• misc: Fix operator output with OI=None @FabioLuporini (#2495)

Benchmarking

• misc: Fixup Profiler.add_global_vanilla @FabioLuporini (#2494)

Testing

• CI: Revert amd CI to a stable rocm for openmp offloading @mloubout (#2529)
• CI: update amd base to working ucx/rocm versions @mloubout (#2527)
• tests: Add test for using a Constant as a condition in a ConditionalDimension @EdCaunt (#2512)

Continuous Integration

• ci: Restore MPI notebook testing @georgebisbas (#2478)

Installation

• pip prod(deps): update psutil requirement from <7.0,>=5.1.0 to >=5.1.0,<8.0 @dependabot (#2535)
• pip prod(deps): update mpi4py requirement from <4.0.3 to <4.0.4 @dependabot (#2536)
• docker: add option to install gcc 14 @mloubout (#2532)
• CI: Revert amd CI to a stable rocm for openmp offloading @mloubout (#2529)
• pip prod(deps): update mpi4py requirement from <4.0.2 to <4.0.3 @dependabot (#2528)
• docker: update compilers to more recent versions @mloubout (#2526)
• deps: Update scipy ascent import @ZoeLeibowitz (#2514)
• pip prod(deps): update numpy requirement from <2.2,>1.16 to >1.16,<2.3 @dependabot (#2498)
• misc: Always search the CUDA SDK's math_libs include dir @FabioLuporini (#2480)
• pip prod(deps): update ipyparallel requirement from <8.9 to <9.1 @dependabot (#2479)
• pip prod(deps): update mpi4py requirement from <4.0.1 to <4.0.2 @dependabot (#2467)
• deps: fix deprecated pkg_resources @mloubout (#2463)
• pip prod(deps): update numpy requirement from <2.1,>1.16 to >1.16,<2.2 @dependabot (#2443)
• pip prod(deps): update mpi4py requirement from <3.1.7 to <4.0.1 @dependabot (#2430)

New Contributors

• @enwask made their first contribution in #2418
• @JDBetteridge made their first contribution in #2504

Full Changelog: v4.8.11...v4.8.12

v4.8.11

Changes

• dsl: Make CondEq and CondNe easier to import @EdCaunt (#2425)

API

• api: Support combination of condition and factor for ConditionalDimension @mloubout (#2413)
• misc: minor miscelanous fixes @mloubout (#2406)

Compiler

• compiler: Bump default block size @FabioLuporini (#2412)
• compiler: Revamp MultiSubDimension lowering @FabioLuporini (#2411)
• compiler: fix cse with different conditionals @mloubout (#2410)
• compiler: Patch bug in SubDomainSet lowering @EdCaunt (#2408)

MPI

• misc: minor miscelanous fixes @mloubout (#2406)

Architectures and JIT

• arch: fix switchconfig with new setup @mloubout (#2419)
• arch: Support more platforms @mloubout (#2415)

🐛 Bug Fixes

• compiler: Fix parlang reductions over >= 4 loops @FabioLuporini (#2417)
• api: Patch ConditionalDimension args @mloubout (#2414)
• compiler: fix cse with different conditionals @mloubout (#2410)
• misc: minor miscelanous fixes @mloubout (#2406)

Continuous Integration

• deps: Drop python 3.8 @mloubout (#2423)

Full Changelog: v4.8.10...v4.8.11