microsoft/ebpf-for-windows
Jan 2025 – Apr 2026
13 Months active
Languages Used
MarkdownCC++YAMLPowerShellC#XMLNone
Technical Skills
DocumentationSystem ProgrammingeBPFConcurrencyLow-level programmingPerformance optimization
D. Michael Agun
PROFILE
D. Michael Agun
Over thirteen months, contributed to microsoft/ebpf-for-windows by designing and implementing core eBPF features, performance optimizations, and build system improvements. Delivered kernel and user-mode enhancements such as lockless ring buffers, synchronous and asynchronous APIs, and advanced socket authorization, using C, C++, and PowerShell scripting. Focused on aligning Windows eBPF APIs with Linux for cross-platform parity, improved CI/CD reliability, and stabilized testing frameworks. Addressed memory management, resource cleanup, and packaging consistency, ensuring robust system programming and developer tooling. The work emphasized low-level programming, network security, and automation, resulting in a more reliable, performant, and maintainable eBPF development environment on Windows.
Overall Statistics
Feature vs Bugs
67%Features
Repository Contributions
30Total
Bugs
7
Commits
30
Features
14
Lines of code
29,463
Activity Months13
Your Network
17 peopleWork History
April 2026
2 Commits
Apr 1, 2026April 2026 (2026-04) — Build stability and packaging improvements for microsoft/ebpf-for-windows. Key features delivered include a controlled bump of the eBPF runtime to 1.2.0 with regenerated bpf2c outputs, and updated versioning so artifacts clearly reflect the 1.2.0 baseline. Packaging alignment was achieved by addressing output consistency across configurations and preparing the packaging pipeline for reliable incremental builds. Major bugs fixed center on NuGet/packaging outputs mismatches and incremental-build triggers, with script/assets tracking to ensure changes propagate correctly. Overall, this work yields more deterministic builds, faster release cycles, and reduced CI noise, while preserving cross-config compatibility. Technologies and skills demonstrated span eBPF/bpf2c, NuGet packaging, MSBuild/Directory.Build.props, Set-Version.ps1, and incremental-build automation across Windows packaging.
2 Commits
Apr 1, 2026April 2026 (2026-04) — Build stability and packaging improvements for microsoft/ebpf-for-windows. Key features delivered include a controlled bump of the eBPF runtime to 1.2.0 with regenerated bpf2c outputs, and updated versioning so artifacts clearly reflect the 1.2.0 baseline. Packaging alignment was achieved by addressing output consistency across configurations and preparing the packaging pipeline for reliable incremental builds. Major bugs fixed center on NuGet/packaging outputs mismatches and incremental-build triggers, with script/assets tracking to ensure changes propagate correctly. Overall, this work yields more deterministic builds, faster release cycles, and reduced CI noise, while preserving cross-config compatibility. Technologies and skills demonstrated span eBPF/bpf2c, NuGet packaging, MSBuild/Directory.Build.props, Set-Version.ps1, and incremental-build automation across Windows packaging.
April 2026
March 2026
3 Commits • 1 Features
Mar 1, 2026Month: 2026-03 | Microsoft/ebpf-for-windows | Concise monthly summary focusing on key accomplishments, major bug fixes, and business value. Highlights include delivery of verifier ecosystem enhancements and API adjustments to align with latest PREVAIL/ebpf-verifier, integration of local implementations for removed functions, and updates to API requirements. Also includes dependency and build hygiene improvements such as a submodule bump and in-memory ELF loading refinements. The period also involved addressing a packaging/naming bug that affected script dependency tracking and revert of related CustomBuild inputs to restore correct rebuild behavior. Key commits are linked below to provide traceability and technical detail. Commits of note for this feature set: - d6b11f32edebb505def7d4ce959a1ebf2f9fa6cb: Bump PREVAIL verifier with API adjustments and enhancements; updated to fix breaking changes and incorporate latest features. Co-authored-by: Michael Agun - 6c53ab9944ef70a1c8320e7d5b59272fde6e536a: Bump prevail to a newer revision; aligns with verifier and builds; Co-authored-by: Michael Agun - f252d74492178cb7b34cd61dc0e54a0da9a3aea3: Revert script dependency tracking change due to package naming bug; restores correct CustomBuild inputs and dependency tracking.
March 2026
3 Commits • 1 Features
Mar 1, 2026Month: 2026-03 | Microsoft/ebpf-for-windows | Concise monthly summary focusing on key accomplishments, major bug fixes, and business value. Highlights include delivery of verifier ecosystem enhancements and API adjustments to align with latest PREVAIL/ebpf-verifier, integration of local implementations for removed functions, and updates to API requirements. Also includes dependency and build hygiene improvements such as a submodule bump and in-memory ELF loading refinements. The period also involved addressing a packaging/naming bug that affected script dependency tracking and revert of related CustomBuild inputs to restore correct rebuild behavior. Key commits are linked below to provide traceability and technical detail. Commits of note for this feature set: - d6b11f32edebb505def7d4ce959a1ebf2f9fa6cb: Bump PREVAIL verifier with API adjustments and enhancements; updated to fix breaking changes and incorporate latest features. Co-authored-by: Michael Agun - 6c53ab9944ef70a1c8320e7d5b59272fde6e536a: Bump prevail to a newer revision; aligns with verifier and builds; Co-authored-by: Michael Agun - f252d74492178cb7b34cd61dc0e54a0da9a3aea3: Revert script dependency tracking change due to package naming bug; restores correct CustomBuild inputs and dependency tracking.
February 2026
7 Commits • 2 Features
Feb 1, 2026February 2026: concise monthly summary for microsoft/ebpf-for-windows focusing on business value and technical achievements across two bug fixes and two feature deliveries, including stability improvements, developer tooling, and API enhancements.
7 Commits • 2 Features
Feb 1, 2026February 2026: concise monthly summary for microsoft/ebpf-for-windows focusing on business value and technical achievements across two bug fixes and two feature deliveries, including stability improvements, developer tooling, and API enhancements.
February 2026
January 2026
4 Commits • 3 Features
Jan 1, 2026January 2026: Delivered high-impact features and reliability improvements in microsoft/ebpf-for-windows, focusing on performance, security, and developer experience. Key changes included enhanced bind hook permissions with tests and docs, a refined LRU map access path for user mode, and a synchronous libbpf ring buffer API with robust cleanup and wait-handle management. These efforts reduced per-operation latency, improved eviction accuracy, and simplified integration for users building eBPF-enabled Windows workloads.
January 2026
4 Commits • 3 Features
Jan 1, 2026January 2026: Delivered high-impact features and reliability improvements in microsoft/ebpf-for-windows, focusing on performance, security, and developer experience. Key changes included enhanced bind hook permissions with tests and docs, a refined LRU map access path for user mode, and a synchronous libbpf ring buffer API with robust cleanup and wait-handle management. These efforts reduced per-operation latency, improved eviction accuracy, and simplified integration for users building eBPF-enabled Windows workloads.
December 2025
1 Commits • 1 Features
Dec 1, 2025December 2025 milestone: Strengthened eBPF socket authorization with hard-permit support for the recv_accept hook in microsoft/ebpf-for-windows. Implemented hard permit mode, introduced comprehensive tests, and delivered stability improvements across permit handling, error paths, and filter lifecycle.
1 Commits • 1 Features
Dec 1, 2025December 2025 milestone: Strengthened eBPF socket authorization with hard-permit support for the recv_accept hook in microsoft/ebpf-for-windows. Implemented hard permit mode, introduced comprehensive tests, and delivered stability improvements across permit handling, error paths, and filter lifecycle.
December 2025
November 2025
1 Commits • 1 Features
Nov 1, 2025Month 2025-11: Focused on stabilizing the testing framework and aligning artifacts for microsoft/ebpf-for-windows to improve release readiness and reduce validation risk. Delivered a Testing Framework Stabilization and Artifact Alignment feature that re-enabled the regression suite and aligned it with the latest release artifacts, enabling faster and more reliable validation of changes before PR merges or releases. Key commits include re-enabling regression tests using v1.0.0-rc1 and updating RegressionArtifactsVersion to 1.0.0-rc1.
November 2025
1 Commits • 1 Features
Nov 1, 2025Month 2025-11: Focused on stabilizing the testing framework and aligning artifacts for microsoft/ebpf-for-windows to improve release readiness and reduce validation risk. Delivered a Testing Framework Stabilization and Artifact Alignment feature that re-enabled the regression suite and aligned it with the latest release artifacts, enabling faster and more reliable validation of changes before PR merges or releases. Key commits include re-enabling regression tests using v1.0.0-rc1 and updating RegressionArtifactsVersion to 1.0.0-rc1.
October 2025
1 Commits
Oct 1, 2025Monthly summary for 2025-10: Focused on stabilizing the BPF conformance workflow for OneBranch builds in microsoft/ebpf-for-windows. Delivered a targeted bug fix to the BPF conformance version fetch path to ensure compatibility with the OneBranch build process, reducing CI noise and improving conformance testing reliability.
1 Commits
Oct 1, 2025Monthly summary for 2025-10: Focused on stabilizing the BPF conformance workflow for OneBranch builds in microsoft/ebpf-for-windows. Delivered a targeted bug fix to the BPF conformance version fetch path to ensure compatibility with the OneBranch build process, reducing CI noise and improving conformance testing reliability.
October 2025
September 2025
4 Commits • 1 Features
Sep 1, 2025September 2025: Focused on delivering Windows eBPF enhancements and stabilizing CI around breaking changes. Key work includes Windows-specific eBPF stream-layer flow classification with TCP stream inspection/actions via WFP, and alignment of buffer APIs with Linux through Windows-specific ebpf_ring_buffer__new and ebpf_perf_buffer__new to enable asynchronous callbacks. Documentation and API updates accompany these changes to improve developer experience and cross-platform parity. To maintain build stability amid evolving changes, scheduled regression tests were temporarily disabled; regression testing will resume via manual dispatch and scheduled runs as changes mature.
September 2025
4 Commits • 1 Features
Sep 1, 2025September 2025: Focused on delivering Windows eBPF enhancements and stabilizing CI around breaking changes. Key work includes Windows-specific eBPF stream-layer flow classification with TCP stream inspection/actions via WFP, and alignment of buffer APIs with Linux through Windows-specific ebpf_ring_buffer__new and ebpf_perf_buffer__new to enable asynchronous callbacks. Documentation and API updates accompany these changes to improve developer experience and cross-platform parity. To maintain build stability amid evolving changes, scheduled regression tests were temporarily disabled; regression testing will resume via manual dispatch and scheduled runs as changes mature.
July 2025
1 Commits
Jul 1, 2025July 2025: Focused on reinforcing test stability and reliability in the ebpf-for-windows project. Delivered a targeted test cleanup for perf_event_array, adding a unique_ptr with a custom deleter to cancel pending asynchronous operations, ensuring proper resource release and reducing flakiness in failure scenarios. This work was implemented in execution_context_unit_test.cpp and linked to commit c51fd3640d3537860a72f08c00f0301758dacda1. The changes improve CI stability, shorten debugging cycles, and decrease false positives related to asynchronous test cleanup.
1 Commits
Jul 1, 2025July 2025: Focused on reinforcing test stability and reliability in the ebpf-for-windows project. Delivered a targeted test cleanup for perf_event_array, adding a unique_ptr with a custom deleter to cancel pending asynchronous operations, ensuring proper resource release and reducing flakiness in failure scenarios. This work was implemented in execution_context_unit_test.cpp and linked to commit c51fd3640d3537860a72f08c00f0301758dacda1. The changes improve CI stability, shorten debugging cycles, and decrease false positives related to asynchronous test cleanup.
July 2025
May 2025
1 Commits • 1 Features
May 1, 2025May 2025 focused on delivering a Linux-parity Ring Buffer API in microsoft/ebpf-for-windows, enabling synchronous consumers and direct memory mapping to support zero-copy data paths and lower latency for eBPF workloads on Windows. The work introduces a new API surface with flags to manage ring buffers, supports both callback-based and direct memory access consumption patterns, and includes Windows and Linux consumption examples to ease cross-platform adoption. This lays the groundwork for higher throughput IPC, better developer experience, and stronger alignment with Linux behavior.
May 2025
1 Commits • 1 Features
May 1, 2025May 2025 focused on delivering a Linux-parity Ring Buffer API in microsoft/ebpf-for-windows, enabling synchronous consumers and direct memory mapping to support zero-copy data paths and lower latency for eBPF workloads on Windows. The work introduces a new API surface with flags to manage ring buffers, supports both callback-based and direct memory access consumption patterns, and includes Windows and Linux consumption examples to ease cross-platform adoption. This lays the groundwork for higher throughput IPC, better developer experience, and stronger alignment with Linux behavior.
March 2025
3 Commits • 2 Features
Mar 1, 2025March 2025 monthly summary for microsoft/ebpf-for-windows focusing on delivered features, stability improvements, and technical impact in the eBPF for Windows project. Key features delivered: - Mandatory context header support for eBPF programs: Enforces mandatory context header support, removing conditional checks and simplifying dispatch logic. Includes docs and tests updates to reflect the change, ensuring a robust execution environment. Commit: 934682f8b0206ffa62b86988c3733cd954b07f5f (Make context header support mandatory, #4267). - Perf Event Array map type for BPF: Adds kernel-side implementation for BPF_MAP_TYPE_PERF_EVENT_ARRAY to enable efficient data transfer to user space and context data capture. Includes core map structure changes and documentation updates. Commits: 2465eef6239b3a2d9ed9f25b01199fb2350943d1 (Perf event array map kernel-side implementation, #4144) and 235c878d455ffffe8bafe44e8168dc1a6113475e (Perf event array cleanup, #4300). Major bugs fixed: - Stabilization around perf event data path with updated maps; cleanup commit reduces complexity and potential edge cases in the perf event array workflow (commit 235c878d455ffffe8bafe44e8168dc1a6113475e). Overall impact and accomplishments: - Delivered a more robust and predictable eBPF execution environment with simpler dispatch logic and reliable user-space data capture. - Improved developer experience through updated docs and tests that reflect the new mandatory header and perf event array features. - Demonstrated end-to-end cross-layer integration: kernel-space map changes, user-space API expectations, and documentation coverage. Technologies/skills demonstrated: - Kernel-space and BPF map development; kernel-user space data transfer optimizations; documentation and test-driven development; code hygiene via targeted commits and cleanup.
3 Commits • 2 Features
Mar 1, 2025March 2025 monthly summary for microsoft/ebpf-for-windows focusing on delivered features, stability improvements, and technical impact in the eBPF for Windows project. Key features delivered: - Mandatory context header support for eBPF programs: Enforces mandatory context header support, removing conditional checks and simplifying dispatch logic. Includes docs and tests updates to reflect the change, ensuring a robust execution environment. Commit: 934682f8b0206ffa62b86988c3733cd954b07f5f (Make context header support mandatory, #4267). - Perf Event Array map type for BPF: Adds kernel-side implementation for BPF_MAP_TYPE_PERF_EVENT_ARRAY to enable efficient data transfer to user space and context data capture. Includes core map structure changes and documentation updates. Commits: 2465eef6239b3a2d9ed9f25b01199fb2350943d1 (Perf event array map kernel-side implementation, #4144) and 235c878d455ffffe8bafe44e8168dc1a6113475e (Perf event array cleanup, #4300). Major bugs fixed: - Stabilization around perf event data path with updated maps; cleanup commit reduces complexity and potential edge cases in the perf event array workflow (commit 235c878d455ffffe8bafe44e8168dc1a6113475e). Overall impact and accomplishments: - Delivered a more robust and predictable eBPF execution environment with simpler dispatch logic and reliable user-space data capture. - Improved developer experience through updated docs and tests that reflect the new mandatory header and perf event array features. - Demonstrated end-to-end cross-layer integration: kernel-space map changes, user-space API expectations, and documentation coverage. Technologies/skills demonstrated: - Kernel-space and BPF map development; kernel-user space data transfer optimizations; documentation and test-driven development; code hygiene via targeted commits and cleanup.
March 2025
February 2025
1 Commits • 1 Features
Feb 1, 2025February 2025: Delivered a high-performance, lockless ebpf_ring_buffer for microsoft/ebpf-for-windows, achieving reduced contention and higher throughput for high-frequency tracing workloads. The work focused on architectural refactor, validation, and documentation, with no user-facing bug fixes this month.
February 2025
1 Commits • 1 Features
Feb 1, 2025February 2025: Delivered a high-performance, lockless ebpf_ring_buffer for microsoft/ebpf-for-windows, achieving reduced contention and higher throughput for high-frequency tracing workloads. The work focused on architectural refactor, validation, and documentation, with no user-facing bug fixes this month.
January 2025
1 Commits • 1 Features
Jan 1, 2025January 2025 monthly summary for microsoft/ebpf-for-windows. Key delivery: BPF perf event export and perf buffer integration. Implemented support for BPF_MAP_TYPE_PERF_EVENT_ARRAY, perf_event_output, and integration with libbpf to manage perf buffers, including an auto-callback option. This enables efficient payload capture from BPF contexts using BPF_F_CTXLEN_MASK, improving observability and data collection for Windows-based eBPF programs. Impact: foundation for performant BPF-based telemetry, enabling improved performance monitoring and debugging workflows; supports future enhancements for perf event-based observability and cross-compatibility with libbpf. Tech emphasis: C/C++, Windows driver/user-mode boundaries, eBPF, perf events, libbpf, BPF F_CTXLEN_MASK, BPF_MAP_TYPE_PERF_EVENT_ARRAY.
1 Commits • 1 Features
Jan 1, 2025January 2025 monthly summary for microsoft/ebpf-for-windows. Key delivery: BPF perf event export and perf buffer integration. Implemented support for BPF_MAP_TYPE_PERF_EVENT_ARRAY, perf_event_output, and integration with libbpf to manage perf buffers, including an auto-callback option. This enables efficient payload capture from BPF contexts using BPF_F_CTXLEN_MASK, improving observability and data collection for Windows-based eBPF programs. Impact: foundation for performant BPF-based telemetry, enabling improved performance monitoring and debugging workflows; supports future enhancements for perf event-based observability and cross-compatibility with libbpf. Tech emphasis: C/C++, Windows driver/user-mode boundaries, eBPF, perf events, libbpf, BPF F_CTXLEN_MASK, BPF_MAP_TYPE_PERF_EVENT_ARRAY.
January 2025
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Quality Metrics
Correctness89.4%
Maintainability84.4%
Architecture86.0%
Performance85.4%
AI Usage29.4%
Skills & Technologies
Programming Languages
CC#C++MarkdownNonePowerShellXMLYAML
Technical Skills
API DesignAPI integrationAsynchronous ProgrammingBuild automationC DevelopmentC programmingC# developmentC++C++ DevelopmentC++ developmentC++ programmingCI/CDCMakeCode RefactoringConcurrency
Repositories Contributed To
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