facebook/OpenBIC
Jan 2025 – Oct 2025
8 Months active
Languages Used
C
Technical Skills
Embedded SystemsFirmware DevelopmentGPIO ConfigurationHardware InteractionSystem IntegrationConcurrency
MandyMCHung
PROFILE
Mandymchung
Mandy Hung contributed to the facebook/OpenBIC repository by engineering robust embedded firmware features and reliability improvements across power management, sensor monitoring, and hardware inventory workflows. She enhanced CXL subsystem stability by refactoring concurrency models and optimizing device endpoint initialization, while also improving event logging and system monitoring through precise GPIO and SEL handling. Mandy implemented DIMM SPD data retrieval via PLDM OEM commands, enabling accurate hardware tracking through the BMC. Her work, primarily in C, demonstrated depth in embedded systems, device drivers, and I2C communication, consistently reducing downtime and improving system observability through thoughtful debugging, version control, and hardware integration.
Overall Statistics
Feature vs Bugs
54%Features
Repository Contributions
16Total
Bugs
6
Commits
16
Features
7
Lines of code
891
Activity Months8
Your Network
35 people
Work History
October 2025
1 Commits • 1 Features
Oct 1, 2025October 2025: Delivered a DIMM manufacturing date retrieval capability via BMC for the OpenBIC project by introducing a new PLDM OEM command to read DIMM SPD data in chunks. This enables accurate inventory management and hardware tracking. The work is tracked under commit 2d8618d4cb82ec8bb1889922202449fbdaed0b6d (fby4: wf: Get DIMM manufacture information (#2568)). No major bugs fixed this month. Overall impact includes improved asset visibility and streamlined lifecycle planning. Technologies demonstrated include PLDM OEM commands, BMC interfaces, and chunked SPD data handling for DIMM inventory integration.
1 Commits • 1 Features
Oct 1, 2025October 2025: Delivered a DIMM manufacturing date retrieval capability via BMC for the OpenBIC project by introducing a new PLDM OEM command to read DIMM SPD data in chunks. This enables accurate inventory management and hardware tracking. The work is tracked under commit 2d8618d4cb82ec8bb1889922202449fbdaed0b6d (fby4: wf: Get DIMM manufacture information (#2568)). No major bugs fixed this month. Overall impact includes improved asset visibility and streamlined lifecycle planning. Technologies demonstrated include PLDM OEM commands, BMC interfaces, and chunked SPD data handling for DIMM inventory integration.
October 2025
September 2025
2 Commits • 1 Features
Sep 1, 2025September 2025 monthly summary for facebook/OpenBIC focusing on firmware-level enhancements in power sequencing and DIMM SPD data handling. The work delivered during the month improved boot reliability, reduced false Power Good events, and optimized DIMM information collection, contributing to higher system uptime and faster POST.
September 2025
2 Commits • 1 Features
Sep 1, 2025September 2025 monthly summary for facebook/OpenBIC focusing on firmware-level enhancements in power sequencing and DIMM SPD data handling. The work delivered during the month improved boot reliability, reduced false Power Good events, and optimized DIMM information collection, contributing to higher system uptime and faster POST.
June 2025
3 Commits • 2 Features
Jun 1, 2025June 2025 performance summary for facebook/OpenBIC: Delivered core resilience and release improvements. Implemented DIMM temperature read failure handling to maintain sensor monitoring through DC cycles; updated firmware release versioning to 2025.24.01 for Sentinel Dome and Wailua Falls; and optimized CXL logging and DC readiness timing to speed up DC cycles and ensure SEL visibility even when CXL is not enabled. This work reduces downtime, improves observability, and supports a more reliable firmware release process.
3 Commits • 2 Features
Jun 1, 2025June 2025 performance summary for facebook/OpenBIC: Delivered core resilience and release improvements. Implemented DIMM temperature read failure handling to maintain sensor monitoring through DC cycles; updated firmware release versioning to 2025.24.01 for Sentinel Dome and Wailua Falls; and optimized CXL logging and DC readiness timing to speed up DC cycles and ensure SEL visibility even when CXL is not enabled. This work reduces downtime, improves observability, and supports a more reliable firmware release process.
June 2025
May 2025
2 Commits • 1 Features
May 1, 2025Month: 2025-05 Summary: Delivered reliability and logging improvements for OpenBIC with targeted SEL accuracy fixes and CXL Heartbeat enhancements. Implemented SEL data integrity by distinguishing between normal GPIO events and special events in addsel_work_handler, addressing SELs being empty except for sys throttle and fast prochot (commit 0b6125de5a0e0d0ae20b233a8dd8cba35d1060e4). Enhanced CXL Heartbeat monitoring: increased monitoring interval to 10s to avoid blocking during power-on, limited HB monitor execution to when DC power is available to prevent timeouts during power-off, and relocated the HB work queue to plat_work_q for improved resource management (commit a72286d1e783c253473f7f1e2d69beef3aab807a).
May 2025
2 Commits • 1 Features
May 1, 2025Month: 2025-05 Summary: Delivered reliability and logging improvements for OpenBIC with targeted SEL accuracy fixes and CXL Heartbeat enhancements. Implemented SEL data integrity by distinguishing between normal GPIO events and special events in addsel_work_handler, addressing SELs being empty except for sys throttle and fast prochot (commit 0b6125de5a0e0d0ae20b233a8dd8cba35d1060e4). Enhanced CXL Heartbeat monitoring: increased monitoring interval to 10s to avoid blocking during power-on, limited HB monitor execution to when DC power is available to prevent timeouts during power-off, and relocated the HB work queue to plat_work_q for improved resource management (commit a72286d1e783c253473f7f1e2d69beef3aab807a).
April 2025
4 Commits • 1 Features
Apr 1, 2025April 2025 monthly work summary for facebook/OpenBIC focused on stabilizing CXL power management and enhancing DC-power validation through heartbeat monitoring. Key fixes reduced runtime-reset edge issues, improved DC state logging accuracy, and introduced automated signaling for CXL power-on sequences.
4 Commits • 1 Features
Apr 1, 2025April 2025 monthly work summary for facebook/OpenBIC focused on stabilizing CXL power management and enhancing DC-power validation through heartbeat monitoring. Key fixes reduced runtime-reset edge issues, improved DC state logging accuracy, and introduced automated signaling for CXL power-on sequences.
April 2025
March 2025
2 Commits • 1 Features
Mar 1, 2025Month 2025-03 — OpenBIC (facebook/OpenBIC) focused on stabilizing CXL detection and device endpoint initialization. By refactoring set_dev_endpoint from a k_work to a dedicated thread and removing redundant initialization calls, the work reduced blocking and prevented CXL restarts, resulting in more reliable CXL device detection and PCIe behavior. This enhances system stability, reduces downtime during device enumeration, and strengthens overall PCIe reliability. Business value includes smoother deployments, fewer restart-induced disruptions, and easier maintenance.
March 2025
2 Commits • 1 Features
Mar 1, 2025Month 2025-03 — OpenBIC (facebook/OpenBIC) focused on stabilizing CXL detection and device endpoint initialization. By refactoring set_dev_endpoint from a k_work to a dedicated thread and removing redundant initialization calls, the work reduced blocking and prevented CXL restarts, resulting in more reliable CXL device detection and PCIe behavior. This enhances system stability, reduces downtime during device enumeration, and strengthens overall PCIe reliability. Business value includes smoother deployments, fewer restart-induced disruptions, and easier maintenance.
February 2025
1 Commits
Feb 1, 2025February 2025 monthly summary for facebook/OpenBIC: Implemented a critical reliability improvement in the CXL subsystem by extending the EID setting timeout from 10 seconds to 60 seconds. This change ensures BMC and BIC have sufficient time to complete EID configuration under variable latency, addressing intermittent BMC waiting issues and reducing failures in the CXL path. The change is tracked in commit fc5ecfa250a1f035000ac44bca856de7f8560496 with message 'fby4: wf: Extend the EID setting time (#2215)'.
1 Commits
Feb 1, 2025February 2025 monthly summary for facebook/OpenBIC: Implemented a critical reliability improvement in the CXL subsystem by extending the EID setting timeout from 10 seconds to 60 seconds. This change ensures BMC and BIC have sufficient time to complete EID configuration under variable latency, addressing intermittent BMC waiting issues and reducing failures in the CXL path. The change is tracked in commit fc5ecfa250a1f035000ac44bca856de7f8560496 with message 'fby4: wf: Extend the EID setting time (#2215)'.
February 2025
January 2025
1 Commits
Jan 1, 2025January 2025: Focused on stabilizing sensor reporting during WF BIC updates for facebook/OpenBIC. The primary deliverable was a bug fix that restores E1S sensor availability by refining GPIO configurations and initialization logic to ensure proper power status reporting and post-update sensor restoration.
January 2025
1 Commits
Jan 1, 2025January 2025: Focused on stabilizing sensor reporting during WF BIC updates for facebook/OpenBIC. The primary deliverable was a bug fix that restores E1S sensor availability by refining GPIO configurations and initialization logic to ensure proper power status reporting and post-update sensor restoration.
Activity
Loading activity data...
Quality Metrics
Correctness83.8%
Maintainability83.8%
Architecture82.4%
Performance75.6%
AI Usage20.0%
Skills & Technologies
Programming Languages
C
Technical Skills
BMCCCIConcurrencyDevice DriversEmbedded SystemsEvent HandlingEvent LoggingFirmware DevelopmentGPIO ConfigurationHardware IntegrationHardware InteractionHardware ManagementI2C CommunicationKernel DevelopmentPLDM
Repositories Contributed To
Overview of all repositories you've contributed to across your timeline