E3SM-Project/E3SM
Sep 2024 – Apr 2026
19 Months active
Languages Used
CMakeXMLFortranShellcmakeCMakefilePerl
Technical Skills
CMakebuild system configurationcompiler optimizationenvironment managementhigh-performance computingsystem configuration
Azamat Mametjanov
PROFILE
Azamat Mametjanov
Worked extensively on the E3SM-Project/E3SM repository, delivering robust improvements to high-performance computing workflows and scientific simulation infrastructure. Over 19 months, contributed features and bug fixes that enhanced build system reliability, optimized resource management, and improved cross-platform compatibility. Leveraged CMake, Python, and Fortran to modernize build configurations, streamline MPI and GPU task binding, and stabilize CI/CD pipelines. Addressed complex issues such as compiler compatibility, parallel processing race conditions, and environment setup across diverse HPC systems. The work emphasized maintainability and scalability, enabling more efficient scientific experiments and reproducible results while supporting evolving hardware and software requirements in climate modeling research.
Overall Statistics
Feature vs Bugs
75%Features
Repository Contributions
114Total
Bugs
13
Commits
114
Features
39
Lines of code
5,828,982
Activity Months19
Your Network
121 peopleSame Organization
@mcs.anl.gov13
Satish BalayMember
Barry SmithMember
Phil CarnsMember
Lois Curfman McInnesMember
Iulian GrindeanuMember
Robert JacobMember
jayeshkrishnaMember
Ken RaffenettiMember
Rinku GuptaMember
Shared Repositories
108
Abhishek BagusettyMember
Erin ThomasMember
Erin ThomasMember
Oscar Diaz-IbarraMember
Andrew RobertsMember
Andrew RobertsMember
Alexander HagerMember
Andrew M. BradleyMember
Andrew M. BradleyMember
Work History
April 2026
5 Commits • 2 Features
Apr 1, 2026Concise monthly summary of HPC development work for 2026-04 focusing on scalable MPI workflows and configuration optimizations in E3SM, delivering clearer resource utilization and more reliable large-scale runs.
5 Commits • 2 Features
Apr 1, 2026Concise monthly summary of HPC development work for 2026-04 focusing on scalable MPI workflows and configuration optimizations in E3SM, delivering clearer resource utilization and more reliable large-scale runs.
April 2026
March 2026
9 Commits • 2 Features
Mar 1, 2026March 2026 monthly summary for E3SM (E3SM-Project/E3SM). Focused on stabilizing and accelerating build/test cycles, improving data handling for HPC runs, and advancing CI/CD readiness for EAMxx. Deliveries span build environment optimization, updated module provisioning for ALCF data, and robust CI/CD workflows, enabling more reliable, scalable simulations and faster integration of changes across platforms (Crux, Improv, ALCF).
March 2026
9 Commits • 2 Features
Mar 1, 2026March 2026 monthly summary for E3SM (E3SM-Project/E3SM). Focused on stabilizing and accelerating build/test cycles, improving data handling for HPC runs, and advancing CI/CD readiness for EAMxx. Deliveries span build environment optimization, updated module provisioning for ALCF data, and robust CI/CD workflows, enabling more reliable, scalable simulations and faster integration of changes across platforms (Crux, Improv, ALCF).
February 2026
2 Commits • 2 Features
Feb 1, 2026February 2026 — Focused on aligning E3SM with Polaris project administration and improving job scheduling reliability. Key changes delivered include updating the E3SMinput project to reflect the new Polaris name and charge account for accurate tracking and billing, and optimizing batch scheduling by migrating from jobmin to nodemin to stabilize job throughput. These changes improve cost allocation, visibility, and resource utilization, with clear traceability to commits.
2 Commits • 2 Features
Feb 1, 2026February 2026 — Focused on aligning E3SM with Polaris project administration and improving job scheduling reliability. Key changes delivered include updating the E3SMinput project to reflect the new Polaris name and charge account for accurate tracking and billing, and optimizing batch scheduling by migrating from jobmin to nodemin to stabilize job throughput. These changes improve cost allocation, visibility, and resource utilization, with clear traceability to commits.
February 2026
January 2026
8 Commits • 3 Features
Jan 1, 2026January 2026 (2026-01) monthly summary for E3SM project: Delivered targeted performance and compatibility improvements across GPU and HPC environments, and reinforced testing coverage for PM-GPU configurations. Key work centered on MPI task binding for optimized GPU resource usage, comprehensive hardware/toolchain upgrades, and rapid bug remediation to stabilize parallel execution. Commit activity highlights a steady sequence of improvements across bindings, CUDA/oneAPI/MKL/toolchain updates, and testing enhancements.
January 2026
8 Commits • 3 Features
Jan 1, 2026January 2026 (2026-01) monthly summary for E3SM project: Delivered targeted performance and compatibility improvements across GPU and HPC environments, and reinforced testing coverage for PM-GPU configurations. Key work centered on MPI task binding for optimized GPU resource usage, comprehensive hardware/toolchain upgrades, and rapid bug remediation to stabilize parallel execution. Commit activity highlights a steady sequence of improvements across bindings, CUDA/oneAPI/MKL/toolchain updates, and testing enhancements.
December 2025
3 Commits • 2 Features
Dec 1, 2025December 2025 monthly summary for E3SM focused on infrastructure and performance improvements to enable reliable cross-machine testing and more efficient GPU resource utilization. Delivered two key features: (1) DevOps and Testing Infrastructure Enhancements to improve test framework reliability and maintainability, including default machine-specific XML-based performance-count configurations and relocation of the GPU affinity script to a dedicated directory; and (2) GPU-Aware MPI Task Binding and Resource Allocation to optimize GPU usage by conditionally binding MPI tasks to GPUs when 64+ MPI processes per node are present. No separate customer-facing feature release this month; efforts were aimed at strengthening CI reliability, performance, and maintainability for scalable GPU-backed workloads.
3 Commits • 2 Features
Dec 1, 2025December 2025 monthly summary for E3SM focused on infrastructure and performance improvements to enable reliable cross-machine testing and more efficient GPU resource utilization. Delivered two key features: (1) DevOps and Testing Infrastructure Enhancements to improve test framework reliability and maintainability, including default machine-specific XML-based performance-count configurations and relocation of the GPU affinity script to a dedicated directory; and (2) GPU-Aware MPI Task Binding and Resource Allocation to optimize GPU usage by conditionally binding MPI tasks to GPUs when 64+ MPI processes per node are present. No separate customer-facing feature release this month; efforts were aimed at strengthening CI reliability, performance, and maintainability for scalable GPU-backed workloads.
December 2025
November 2025
1 Commits
Nov 1, 2025November 2025 monthly summary for E3SM project focused on stabilizing the theta-l_kokkos limiter by addressing a race condition. Delivered a critical bug fix that removes profiling calls and ensures proper synchronization with team barriers, preventing read-after-write hazards. No new features released this month; all efforts targeted reliability, correctness, and stability of the limiter path in large-scale simulations.
November 2025
1 Commits
Nov 1, 2025November 2025 monthly summary for E3SM project focused on stabilizing the theta-l_kokkos limiter by addressing a race condition. Delivered a critical bug fix that removes profiling calls and ensures proper synchronization with team barriers, preventing read-after-write hazards. No new features released this month; all efforts targeted reliability, correctness, and stability of the limiter path in large-scale simulations.
October 2025
3 Commits • 2 Features
Oct 1, 2025October 2025 monthly summary for the E3SM project highlighting feature delivery, bug fixes, and impact on code health, CI reliability, and test reproducibility. Focused on streamlining the evaluation subsystem, stabilizing OneAPI builds, and improving test isolation across major suites to accelerate iteration toward releases.
3 Commits • 2 Features
Oct 1, 2025October 2025 monthly summary for the E3SM project highlighting feature delivery, bug fixes, and impact on code health, CI reliability, and test reproducibility. Focused on streamlining the evaluation subsystem, stabilizing OneAPI builds, and improving test isolation across major suites to accelerate iteration toward releases.
October 2025
September 2025
11 Commits • 4 Features
Sep 1, 2025September 2025 monthly summary for E3SM (repository: E3SM-Project/E3SM). Focused on delivering HPC build and environment improvements, stabilizing tests, and upgrading compiler/toolchain support to accelerate scientific workloads on NVIDIA Polaris/Aurora and related systems. Emphasis on business value: improved hardware compatibility, reduced maintenance, and more reliable, scalable builds.
September 2025
11 Commits • 4 Features
Sep 1, 2025September 2025 monthly summary for E3SM (repository: E3SM-Project/E3SM). Focused on delivering HPC build and environment improvements, stabilizing tests, and upgrading compiler/toolchain support to accelerate scientific workloads on NVIDIA Polaris/Aurora and related systems. Emphasis on business value: improved hardware compatibility, reduced maintenance, and more reliable, scalable builds.
August 2025
1 Commits
Aug 1, 2025Month: 2025-08 — Delivered a critical fix to the MPAS Sea Ice Core Interface to resolve an Internal Compiler Error observed when compiling with the oneAPI compiler. By modularizing the interface (splitting mpas_seaice_core_interface.F into mpas_seaice_core_interface.F and mpas_seaice_core_interface_structs.F), the codebase becomes more maintainable and the build process more stable, reducing CI failures and accelerating downstream development for climate simulations. The change is committed under fe0de1b8f629e9c06702716aee55991d47a66b8f with message "Split large mpas-si file to prevent ICE with oneapi compiler".
1 Commits
Aug 1, 2025Month: 2025-08 — Delivered a critical fix to the MPAS Sea Ice Core Interface to resolve an Internal Compiler Error observed when compiling with the oneAPI compiler. By modularizing the interface (splitting mpas_seaice_core_interface.F into mpas_seaice_core_interface.F and mpas_seaice_core_interface_structs.F), the codebase becomes more maintainable and the build process more stable, reducing CI failures and accelerating downstream development for climate simulations. The change is committed under fe0de1b8f629e9c06702716aee55991d47a66b8f with message "Split large mpas-si file to prevent ICE with oneapi compiler".
August 2025
June 2025
6 Commits • 1 Features
Jun 1, 2025June 2025 monthly summary for E3SM project highlighting key features delivered, major bug fixes, and overall impact. Focused on reliability across Aurora and Polaris, robust test configurations, and GPU/CPU compatibility improvements.
June 2025
6 Commits • 1 Features
Jun 1, 2025June 2025 monthly summary for E3SM project highlighting key features delivered, major bug fixes, and overall impact. Focused on reliability across Aurora and Polaris, robust test configurations, and GPU/CPU compatibility improvements.
May 2025
9 Commits • 8 Features
May 1, 2025May 2025 performance summary for the E3SM project focused on build-system modernization, HPC test configuration, and environment hardening to improve reliability, performance, and developer productivity across HPC platforms.
9 Commits • 8 Features
May 1, 2025May 2025 performance summary for the E3SM project focused on build-system modernization, HPC test configuration, and environment hardening to improve reliability, performance, and developer productivity across HPC platforms.
May 2025
April 2025
8 Commits • 2 Features
Apr 1, 2025April 2025 performance and stability focus for the E3SM project. Delivered five items that improve stability, performance, and maintainability, with clear ownership and traceability via commit references. Key features delivered: - Resource management and GPU binding enhancements: consolidated resource management, corrected MPI setup for Aurora, removal of duplicate Batch Job Controller PEs, avoidance of system-reserved cores, explicit GPU and memory binding, and an increased per-task GPU thread limit to improve stability and performance. Commits: fa4b8ae89ba065ebb72d5cd4d2cc5bc240d34ed2; 330016ea985f3cc20f74569e57d9e90e2164c11d; 9731d28609e561dba627a30228a886c3137883ab - Build system and compiler compatibility updates: fixed build failures with newer compilers by removing deprecated SYCL flags and ensuring compatibility. Commits: 67e2bbdefd8c057a7275c5a4e8f70fc6e1bfa4af; f7bc3fa622b0edde18512dadf3aaa81b0e946586 - Testing configuration simplification for testmods: removed explicit JOB_WALLCLOCK_TIME; allow system to determine wall-clock time for test mods (lulcc_sville) in elm config. Commit: 7d8f12fae581b722daa5c83c69debe6404330397 - LND initialization race condition fix under multi-threading: addressed race condition in Fortran writes during LND init by wrapping elm_ptrs_check in an OpenMP critical section to ensure data integrity. Commit: 05b03dde33542b7b6e2a8f14b6c96d48a9fe082c - Codebase cleanup and reformatting: removed unused files/directories and reformatted code to improve readability and maintainability. Commit: b4a6dc1cf12cf66be5bbfb3461f3544bc9119c8a
April 2025
8 Commits • 2 Features
Apr 1, 2025April 2025 performance and stability focus for the E3SM project. Delivered five items that improve stability, performance, and maintainability, with clear ownership and traceability via commit references. Key features delivered: - Resource management and GPU binding enhancements: consolidated resource management, corrected MPI setup for Aurora, removal of duplicate Batch Job Controller PEs, avoidance of system-reserved cores, explicit GPU and memory binding, and an increased per-task GPU thread limit to improve stability and performance. Commits: fa4b8ae89ba065ebb72d5cd4d2cc5bc240d34ed2; 330016ea985f3cc20f74569e57d9e90e2164c11d; 9731d28609e561dba627a30228a886c3137883ab - Build system and compiler compatibility updates: fixed build failures with newer compilers by removing deprecated SYCL flags and ensuring compatibility. Commits: 67e2bbdefd8c057a7275c5a4e8f70fc6e1bfa4af; f7bc3fa622b0edde18512dadf3aaa81b0e946586 - Testing configuration simplification for testmods: removed explicit JOB_WALLCLOCK_TIME; allow system to determine wall-clock time for test mods (lulcc_sville) in elm config. Commit: 7d8f12fae581b722daa5c83c69debe6404330397 - LND initialization race condition fix under multi-threading: addressed race condition in Fortran writes during LND init by wrapping elm_ptrs_check in an OpenMP critical section to ensure data integrity. Commit: 05b03dde33542b7b6e2a8f14b6c96d48a9fe082c - Codebase cleanup and reformatting: removed unused files/directories and reformatted code to improve readability and maintainability. Commit: b4a6dc1cf12cf66be5bbfb3461f3544bc9119c8a
March 2025
16 Commits • 3 Features
Mar 1, 2025March 2025 (2025-03) – Consolidated HPC runtime optimization, scaling experiments, and ops improvements for E3SM on Polaris/Aurora and Ne4/Ne30 configurations. Key features delivered: (1) HPC runtime configuration and performance optimization across Polaris/Aurora—CPU affinity, OpenMP thread binding, MPI/process layout tweaks, hyper-threading policy, and build-system refinements to improve execution reliability and throughput; (2) Ne4/Ne30 scaling experiments and test configurations—Ne4 single-node run, Ne4 LND on 12 tasks, and Ne30 on 2 nodes to explore resource scaling and testing scenarios; (3) System cleanup and monitoring/config improvements—code tidy-ups, routing/monitoring tweaks, and more readable identifiers to improve ops workflows; (4) Build-system hygiene—cmake cleanup and ensuring release flags are consistently applied. Overall impact: more reliable HPC runs, improved throughput, and clearer observability for capacity planning and future optimizations. Technologies/skills demonstrated: CPU affinity and OpenMP threading, MPI/config tuning, Kokkos-related machine-config updates, CMake/build-system hygiene, PBSPro normalization, and enhanced logging/monitoring for ops.
16 Commits • 3 Features
Mar 1, 2025March 2025 (2025-03) – Consolidated HPC runtime optimization, scaling experiments, and ops improvements for E3SM on Polaris/Aurora and Ne4/Ne30 configurations. Key features delivered: (1) HPC runtime configuration and performance optimization across Polaris/Aurora—CPU affinity, OpenMP thread binding, MPI/process layout tweaks, hyper-threading policy, and build-system refinements to improve execution reliability and throughput; (2) Ne4/Ne30 scaling experiments and test configurations—Ne4 single-node run, Ne4 LND on 12 tasks, and Ne30 on 2 nodes to explore resource scaling and testing scenarios; (3) System cleanup and monitoring/config improvements—code tidy-ups, routing/monitoring tweaks, and more readable identifiers to improve ops workflows; (4) Build-system hygiene—cmake cleanup and ensuring release flags are consistently applied. Overall impact: more reliable HPC runs, improved throughput, and clearer observability for capacity planning and future optimizations. Technologies/skills demonstrated: CPU affinity and OpenMP threading, MPI/config tuning, Kokkos-related machine-config updates, CMake/build-system hygiene, PBSPro normalization, and enhanced logging/monitoring for ops.
March 2025
February 2025
17 Commits • 2 Features
Feb 1, 2025February 2025 (Month: 2025-02) focused on stabilizing the Python software environment and modernizing the Polaris/EAMXX build/test/runtime stack for E3SM, enabling more reliable, scalable deployments across leading HPC platforms. Key outcomes include stabilizing Python across Anvil, Chrysalis, and Aurora; updating Python versions and dependencies; resolving module conflicts and enhancing error tracing; and upgrading the build/test/runtime infrastructure for EAMXX/Polaris with new CMake material, CUDA options, MPI/test configurations, and robust environment/module management. These changes reduce environment-related failures, shorten test cycles, and improve performance and reliability for research on Polaris and related systems. All changes were validated with environment checks and representative tests to ensure smooth researcher workflow and production-grade deployments.
February 2025
17 Commits • 2 Features
Feb 1, 2025February 2025 (Month: 2025-02) focused on stabilizing the Python software environment and modernizing the Polaris/EAMXX build/test/runtime stack for E3SM, enabling more reliable, scalable deployments across leading HPC platforms. Key outcomes include stabilizing Python across Anvil, Chrysalis, and Aurora; updating Python versions and dependencies; resolving module conflicts and enhancing error tracing; and upgrading the build/test/runtime infrastructure for EAMXX/Polaris with new CMake material, CUDA options, MPI/test configurations, and robust environment/module management. These changes reduce environment-related failures, shorten test cycles, and improve performance and reliability for research on Polaris and related systems. All changes were validated with environment checks and representative tests to ensure smooth researcher workflow and production-grade deployments.
January 2025
8 Commits • 3 Features
Jan 1, 2025January 2025 monthly summary highlighting key features delivered, major bugs fixed, overall impact, and technologies demonstrated for E3SM (E3SM-Project/E3SM). Focus on business value and technical achievements with explicit commits referenced.
8 Commits • 3 Features
Jan 1, 2025January 2025 monthly summary highlighting key features delivered, major bugs fixed, overall impact, and technologies demonstrated for E3SM (E3SM-Project/E3SM). Focus on business value and technical achievements with explicit commits referenced.
January 2025
December 2024
2 Commits • 1 Features
Dec 1, 2024December 2024 monthly summary for E3SM (E3SM repository). Focused on codebase clarity and build configuration cleanup to improve maintainability and reduce build errors in SYCL-enabled paths. Delivered two changes with commits that rename PE-layouts and centralize SYCL linker flags.
December 2024
2 Commits • 1 Features
Dec 1, 2024December 2024 monthly summary for E3SM (E3SM repository). Focused on codebase clarity and build configuration cleanup to improve maintainability and reduce build errors in SYCL-enabled paths. Delivered two changes with commits that rename PE-layouts and centralize SYCL linker flags.
November 2024
1 Commits
Nov 1, 2024Concise monthly summary for 2024-11 focusing on the E3SM project improvements including a critical SYCL backend flag linking fix for oneapi-ifxgpu and associated CMake updates. Emphasize business value and cross-functional collaboration, performance and build reliability, and future-proofing for SYCL runs.
1 Commits
Nov 1, 2024Concise monthly summary for 2024-11 focusing on the E3SM project improvements including a critical SYCL backend flag linking fix for oneapi-ifxgpu and associated CMake updates. Emphasize business value and cross-functional collaboration, performance and build reliability, and future-proofing for SYCL runs.
November 2024
October 2024
2 Commits • 1 Features
Oct 1, 2024October 2024: Implemented PE configuration optimization for NARRM on Anvil and production workflows on Improv within the E3SM project. Key changes include updated Process Element (PE) definitions, refined layouts, and adjusted node counts with sypd estimates for Small, SMedium, and Medium workloads on Anvil. On Improv, added e3sm_prod PE configurations to support production runs on the maint-3.0 branch.
October 2024
2 Commits • 1 Features
Oct 1, 2024October 2024: Implemented PE configuration optimization for NARRM on Anvil and production workflows on Improv within the E3SM project. Key changes include updated Process Element (PE) definitions, refined layouts, and adjusted node counts with sypd estimates for Small, SMedium, and Medium workloads on Anvil. On Improv, added e3sm_prod PE configurations to support production runs on the maint-3.0 branch.
September 2024
2 Commits • 1 Features
Sep 1, 2024Month: 2024-09 — Focused on enhancing HPC environment compatibility and cross-system usability for E3SM. Delivered two critical improvements that streamline Cray/GNU builds and module management on ALCF Polaris, reducing deployment friction and improving performance on Cray systems. This work lays groundwork for more stable, portable runs across HPC platforms and supports faster iteration cycles for scientific experiments.
2 Commits • 1 Features
Sep 1, 2024Month: 2024-09 — Focused on enhancing HPC environment compatibility and cross-system usability for E3SM. Delivered two critical improvements that streamline Cray/GNU builds and module management on ALCF Polaris, reducing deployment friction and improving performance on Cray systems. This work lays groundwork for more stable, portable runs across HPC platforms and supports faster iteration cycles for scientific experiments.
September 2024
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Quality Metrics
Correctness85.8%
Maintainability85.6%
Architecture78.6%
Performance77.4%
AI Usage20.8%
Skills & Technologies
Programming Languages
BashCC++CMakeFortranMakefilePerlPythonShellXML
Technical Skills
Build ConfigurationBuild System ConfigurationBuild SystemsC++C/C++ DevelopmentCI/CDCMakeCUDAClimate ModelingCode RefactoringCompiler ConfigurationCompiler FlagsCompiler OptimizationConfiguration ManagementConfiguration management
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