facebook/fboss
Feb 2025 – Apr 2026
15 Months active
Languages Used
C++ThriftMarkdownCSVPythonJSONCMake
Technical Skills
API developmentC++C++ developmentNetwork ProgrammingQuality AssuranceSoftware Testing
Wei Dai
PROFILE
Wei Dai
During 15 months on the facebook/fboss repository, Daiwei Xie engineered scalable network features and robust testing frameworks to advance high-performance switch infrastructure. He developed and refined Hyper Port capabilities, implemented dynamic rate limiting for Thrift APIs, and expanded hardware support for platforms like Meru800bia and Jericho4. Leveraging C++ and Thrift, Daiwei delivered end-to-end monitoring, enhanced cable length measurement, and improved route management to ensure reliability during interface migrations. His work emphasized modular system design, rigorous unit testing, and seamless integration with SAI APIs, resulting in resilient, maintainable backend systems that improved observability, performance, and deployment confidence across large-scale networks.
Overall Statistics
Feature vs Bugs
61%Features
Repository Contributions
251Total
Bugs
44
Commits
251
Features
69
Lines of code
60,232
Activity Months15
Your Network
2831 peopleSame Organization
@meta.com2597
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Aahan AggarwalMember
Aliaksei AndreyeuMember
Arjun ChaturvediMember
Aaron PollackMember
Aaryaman SagarMember
Aashay GaikwadMember
Ajanthan AsogamoorthyMember
Shared Repositories
234
Salman Muin Kayser ChishtiMember
Arjun ChaturvediMember
Adam CalabrigoMember
Alex EckertMember
Alan FrindellMember
Ashutosh GrewalMember
Anurag GumidelliMember
Alex HornbyMember
aalamsi22Member
Work History
April 2026
18 Commits • 2 Features
Apr 1, 2026April 2026 monthly performance summary for facebook/fboss development. Focused on stabilizing route management during interface migrations and IP migrations, expanding hardware support, and strengthening testing rigor to improve reliability, performance, and business value in multi-NPU environments. Key outcomes include preventing stale routes, enabling Jericho4 hardware support, and delivering per-NPU testing improvements that reduce bench-and-run risk.
18 Commits • 2 Features
Apr 1, 2026April 2026 monthly performance summary for facebook/fboss development. Focused on stabilizing route management during interface migrations and IP migrations, expanding hardware support, and strengthening testing rigor to improve reliability, performance, and business value in multi-NPU environments. Key outcomes include preventing stale routes, enabling Jericho4 hardware support, and delivering per-NPU testing improvements that reduce bench-and-run risk.
April 2026
March 2026
25 Commits • 18 Features
Mar 1, 2026March 2026 focused on delivering scalable testability and reliability for FBOSS deployments. Key features delivered include new bulk APIs and traffic control enhancements, while critical fixes improved RX path safety and port-state handling. The work reduces operational overhead, improves observability, and enables fleet-wide PRBS and traffic testing for large fabric ports with robust LACP behavior, showcasing proficiency in Thrift services, SAI integration, and hyper-port workflows.
March 2026
25 Commits • 18 Features
Mar 1, 2026March 2026 focused on delivering scalable testability and reliability for FBOSS deployments. Key features delivered include new bulk APIs and traffic control enhancements, while critical fixes improved RX path safety and port-state handling. The work reduces operational overhead, improves observability, and enables fleet-wide PRBS and traffic testing for large fabric ports with robust LACP behavior, showcasing proficiency in Thrift services, SAI integration, and hyper-port workflows.
February 2026
10 Commits • 5 Features
Feb 1, 2026February 2026 FBOSS (facebook/fboss) performance summary focusing on reliability, testing improvements, and observability. Key achievements include resilient test-driver detection via DSF-derived SwitchID; new multi-node EDSW verification utilities; CLM support for port media type and propagation delay; hyper port testing enhancements with L2 tests and PRBS visibility; and exposed Thrift profiling endpoints for runtime diagnostics. Also delivered stability improvements by guarding optional cable length flags, temporarily disabling unimplemented fabric statistics, and adding EFT-DL-7700R4C-38PE-C-F model support to prevent agent crashes.
10 Commits • 5 Features
Feb 1, 2026February 2026 FBOSS (facebook/fboss) performance summary focusing on reliability, testing improvements, and observability. Key achievements include resilient test-driver detection via DSF-derived SwitchID; new multi-node EDSW verification utilities; CLM support for port media type and propagation delay; hyper port testing enhancements with L2 tests and PRBS visibility; and exposed Thrift profiling endpoints for runtime diagnostics. Also delivered stability improvements by guarding optional cable length flags, temporarily disabling unimplemented fabric statistics, and adding EFT-DL-7700R4C-38PE-C-F model support to prevent agent crashes.
February 2026
January 2026
32 Commits • 5 Features
Jan 1, 2026January 2026 performance snapshot focused on expanding fboss testing coverage for hyper-port configurations, stabilizing test responses, and restoring build reliability. Delivered LLDP Loopback Test to validate neighbor discovery with all ports in loopback; integrated and hardened hyper-port tests across the suite, including port/serdes config alignment and dynamic test flags; refined test configurations with FLAGS_hide_interface_ports to ensure correctness in hyper-port and warmboot scenarios; fixed OSS fboss agent build to restore CI reliability; stabilized critical hyper-port tests to reduce flakiness in CI. Result: stronger validation of hyper-port deployments, reduced production risk, and improved hardware/SDK compatibility. Demonstrated proficiency in test harness design, LLDP/LACP test patterns, and hyper-port port management.
January 2026
32 Commits • 5 Features
Jan 1, 2026January 2026 performance snapshot focused on expanding fboss testing coverage for hyper-port configurations, stabilizing test responses, and restoring build reliability. Delivered LLDP Loopback Test to validate neighbor discovery with all ports in loopback; integrated and hardened hyper-port tests across the suite, including port/serdes config alignment and dynamic test flags; refined test configurations with FLAGS_hide_interface_ports to ensure correctness in hyper-port and warmboot scenarios; fixed OSS fboss agent build to restore CI reliability; stabilized critical hyper-port tests to reduce flakiness in CI. Result: stronger validation of hyper-port deployments, reduced production risk, and improved hardware/SDK compatibility. Demonstrated proficiency in test harness design, LLDP/LACP test patterns, and hyper-port port management.
December 2025
9 Commits • 2 Features
Dec 1, 2025December 2025: Delivered targeted features and reliability fixes for FBOSS Hyper Port and Meru800BIA Ethernet port workflows in facebook/fboss. Improvements tightened measurement accuracy (cable length calculations), stabilized hyper port behavior (NDP interface ID correctness), and expanded hardware validation with scalable line-rate testing (SRAM mode) to validate 3.2 Tbps capabilities. Result: enhanced network reliability, faster validation cycles, and clearer NDP and test outcomes supporting higher-performance deployments and reduced field issues.
9 Commits • 2 Features
Dec 1, 2025December 2025: Delivered targeted features and reliability fixes for FBOSS Hyper Port and Meru800BIA Ethernet port workflows in facebook/fboss. Improvements tightened measurement accuracy (cable length calculations), stabilized hyper port behavior (NDP interface ID correctness), and expanded hardware validation with scalable line-rate testing (SRAM mode) to validate 3.2 Tbps capabilities. Result: enhanced network reliability, faster validation cycles, and clearer NDP and test outcomes supporting higher-performance deployments and reduced field issues.
December 2025
November 2025
23 Commits • 3 Features
Nov 1, 2025November 2025 performance summary for facebook/fboss: Expanded hyper port validation across J3 and other platforms, added cable propagation delay measurement, and enabled dynamic cable length measurement based on agent config. Key outcomes include: 1) Hyper port test suite enhancements enabling tests to run with hyper ports (traffic PFC tests, mirror/sflow) with broader coverage; 2) Hyper port test compatibility fixes across tests, hardware tests, route tests, and mirroring to ensure reliable hyper port validation; 3) Hyper port test support on J3 enabling AgentJumboFramesTest, AgentMirroringScaleTest, AgentVoqShel, and AgentMirrorOnDropTests to run with hyper ports; 4) Cable propagation delay measurement support via switch_config and the SAI API; 5) Dynamic cable length measurement enablement based on agent config. These efforts improve validation coverage, reduce debugging time, and accelerate readiness for next-gen hyper-port deployments.
November 2025
23 Commits • 3 Features
Nov 1, 2025November 2025 performance summary for facebook/fboss: Expanded hyper port validation across J3 and other platforms, added cable propagation delay measurement, and enabled dynamic cable length measurement based on agent config. Key outcomes include: 1) Hyper port test suite enhancements enabling tests to run with hyper ports (traffic PFC tests, mirror/sflow) with broader coverage; 2) Hyper port test compatibility fixes across tests, hardware tests, route tests, and mirroring to ensure reliable hyper port validation; 3) Hyper port test support on J3 enabling AgentJumboFramesTest, AgentMirroringScaleTest, AgentVoqShel, and AgentMirrorOnDropTests to run with hyper ports; 4) Cable propagation delay measurement support via switch_config and the SAI API; 5) Dynamic cable length measurement enablement based on agent config. These efforts improve validation coverage, reduce debugging time, and accelerate readiness for next-gen hyper-port deployments.
October 2025
24 Commits • 5 Features
Oct 1, 2025October 2025 FBOSS development focused on delivering and hardening Hyper Port capabilities across the fboss repository. Key outcomes include core state enhancements for hyper-ports, refined mapping and port-offset handling for Meru/EdsW platforms, LLDP enablement, targeted unit tests to catch race conditions, multiple bug fixes to improve reliability, and alignment with asic_config_v2.thrift and warmboot workflows. This work advances DSF hyper-port feature readiness, improves stability under dynamic port states, and strengthens deployment confidence with extended test coverage and platform mapping updates.
24 Commits • 5 Features
Oct 1, 2025October 2025 FBOSS development focused on delivering and hardening Hyper Port capabilities across the fboss repository. Key outcomes include core state enhancements for hyper-ports, refined mapping and port-offset handling for Meru/EdsW platforms, LLDP enablement, targeted unit tests to catch race conditions, multiple bug fixes to improve reliability, and alignment with asic_config_v2.thrift and warmboot workflows. This work advances DSF hyper-port feature readiness, improves stability under dynamic port states, and strengthens deployment confidence with extended test coverage and platform mapping updates.
October 2025
September 2025
22 Commits • 5 Features
Sep 1, 2025September 2025 performance for facebook/fboss focused on delivering HyperPort-enabled infrastructure, expanding platform mappings, and strengthening API/config surfaces to enable higher throughput and flexible port aggregation across Meru800bia and EDSW. Key work delivered includes HyperPort integration, API enhancements, and thrift/config updates, alongside stability fixes to improve platform reliability and maintainability.
September 2025
22 Commits • 5 Features
Sep 1, 2025September 2025 performance for facebook/fboss focused on delivering HyperPort-enabled infrastructure, expanding platform mappings, and strengthening API/config surfaces to enable higher throughput and flexible port aggregation across Meru800bia and EDSW. Key work delivered includes HyperPort integration, API enhancements, and thrift/config updates, alongside stability fixes to improve platform reliability and maintainability.
August 2025
4 Commits • 2 Features
Aug 1, 2025Month 2025-08 (facebook/fboss) recap: Delivered DSF Hyper-Port support with a new HYPER_PORT type and IsHyperPortMember attribute, enabled by commits 361dbac921a2d8b2665d53ae5c27758ae1c5e81c and 095cee36601dc9f01bc3036376c478d5f5a56411. Added enhanced multicast neighbor solicitation across all reachable L3 interfaces (commit eaeb010867ad1b07c9d10ab8eaaa828667ec9010). Fixed port state synchronization after PRBS on BCM platforms to ensure the port state reflects SDK status (commit 9ce2750c6cfd121c5f61cae8d6e1181ecd7a44f1). Impact: broader DSF feature coverage, improved network reliability for multicast paths, and accurate link state reporting, driving stability and reduced operational risk. Technologies/skills demonstrated: C++/FBOSS codebase, switch_config modeling, SAI PortApi, BCM SDK integration, NDP/MLD multicast handling, PRBS testing, and robust port state management.
4 Commits • 2 Features
Aug 1, 2025Month 2025-08 (facebook/fboss) recap: Delivered DSF Hyper-Port support with a new HYPER_PORT type and IsHyperPortMember attribute, enabled by commits 361dbac921a2d8b2665d53ae5c27758ae1c5e81c and 095cee36601dc9f01bc3036376c478d5f5a56411. Added enhanced multicast neighbor solicitation across all reachable L3 interfaces (commit eaeb010867ad1b07c9d10ab8eaaa828667ec9010). Fixed port state synchronization after PRBS on BCM platforms to ensure the port state reflects SDK status (commit 9ce2750c6cfd121c5f61cae8d6e1181ecd7a44f1). Impact: broader DSF feature coverage, improved network reliability for multicast paths, and accurate link state reporting, driving stability and reduced operational risk. Technologies/skills demonstrated: C++/FBOSS codebase, switch_config modeling, SAI PortApi, BCM SDK integration, NDP/MLD multicast handling, PRBS testing, and robust port state management.
August 2025
July 2025
14 Commits • 4 Features
Jul 1, 2025July 2025 fboss monthly summary focusing on delivering measurable business value and technical excellence across reliability, observability, and performance. Key outcomes include enhanced rate-limiting visibility, improved DSF credit scheduling, hardened multi-switch link state handling, improved system observability, and robustness in platform product info parsing. These efforts reduce MTTR, improve QoS, and increase maintainability for future iterations.
July 2025
14 Commits • 4 Features
Jul 1, 2025July 2025 fboss monthly summary focusing on delivering measurable business value and technical excellence across reliability, observability, and performance. Key outcomes include enhanced rate-limiting visibility, improved DSF credit scheduling, hardened multi-switch link state handling, improved system observability, and robustness in platform product info parsing. These efforts reduce MTTR, improve QoS, and increase maintainability for future iterations.
June 2025
15 Commits • 3 Features
Jun 1, 2025June 2025: Delivered high-impact FBOSS enhancements and stability fixes, driving reliability and efficiency for customer workloads. Key outcomes: - Configurable Thrift API rate limiting framework with dynamic config and shadow mode (server scaffolding in place for enforcement). - DSF Credit Request Scheduling with SaiSwitch support enabling prioritized, parameter-driven scheduling. - 3-tap SerDes programming for Tomahawk5 management port ensuring NRZ modulation compatibility. - Bug fixes: MinLink Neighbor Cache stability fix to prevent race conditions during port changes and flaps; Diagnostic shell output handling fix removing blocking fflush and routing messages to log. Impact: reduces risk of API overload, improves scheduling efficiency, increases hardware reliability, and speeds troubleshooting. Demonstrates proficiency in C++, FBOSS agent architecture, Thrift, dynamic configuration, SaiSwitch integration, and hardware-software co-design.
15 Commits • 3 Features
Jun 1, 2025June 2025: Delivered high-impact FBOSS enhancements and stability fixes, driving reliability and efficiency for customer workloads. Key outcomes: - Configurable Thrift API rate limiting framework with dynamic config and shadow mode (server scaffolding in place for enforcement). - DSF Credit Request Scheduling with SaiSwitch support enabling prioritized, parameter-driven scheduling. - 3-tap SerDes programming for Tomahawk5 management port ensuring NRZ modulation compatibility. - Bug fixes: MinLink Neighbor Cache stability fix to prevent race conditions during port changes and flaps; Diagnostic shell output handling fix removing blocking fflush and routing messages to log. Impact: reduces risk of API overload, improves scheduling efficiency, increases hardware reliability, and speeds troubleshooting. Demonstrates proficiency in C++, FBOSS agent architecture, Thrift, dynamic configuration, SaiSwitch integration, and hardware-software co-design.
June 2025
May 2025
11 Commits • 3 Features
May 1, 2025Month: 2025-05 — Monthly summary for facebook/fboss focusing on business value, reliability, and technical accomplishments. Key achievements delivered this month: - End-to-end Switch pipeline monitoring and statistics subsystem: implemented initialization loading of switch pipeline objects during agent startup, added collection and publishing of pipeline counters via fb303, and enhanced tracing for switch pipeline operations to improve visibility and performance monitoring. This work spans multiple commits to load, replayer support, hardware_stats integration, and publication of stats (e.g., 49305f7a4a11aafb02b9889e2fde124b7575e2f9; fc49a41c2065930b961c69636b370dc0853d7797; 49be96969407c31d7ed34b07ea7b1ce377112c91; d2fa94f5c3961e736cffe782630b756ad638737f; 4da14cb07fde38dfe5fa5e5b668e99f11ff3127a; 460d64fa83a5c0a33bede9aa8dd069d710d5fdd3; bb0152ce019b97ee274d3e1eb5ffe400123b1f3e). - 400G copper port profile for Darwin platform mapping: introduced a new 400G copper port profile to support high-speed connectivity and scalability for Darwin-based hardware (857e68a4a5daac5a7231050e8e8cb5ca18c8324e). - Thrift method rate limiting library: added a token bucket based rate-limiter for Thrift method calls to protect services from overuse, with unit tests validating constructor behavior and integration (4fbf3e9a272b45fed80ba3dd9b4505c109d34276; dcccd2d70fbebc5432e6647e8af8cb313a03e589). - Test framework reliability fix: ensured the test suite includes all tests by fixing missing test cases from bcm_multinode_test build, improving test coverage and reliability (48f23bbab68af81961ccdc348aec713d28fb31d0). Major business impact: - Improved observability and performance visibility of switch pipeline operations, enabling faster issue diagnosis and optimization. - Enabled higher-bandwidth hardware support, expanding platform capabilities and future-proofing for scalable deployments. - Strengthened system resilience against misuse and load bursts through rate limiting, reducing risk of service degradation. - Increased test suite reliability, improving confidence in release quality and reducing post-merge defects. Technologies demonstrated: - fb303, hardware_stats.thrift integration, SwSwitch, SAI replayer support, and init-time object loading. - Thrift-based rate limiting (token bucket) with unit tests. - C++ development practices, test harness maintenance, and platform mapping contributions.
May 2025
11 Commits • 3 Features
May 1, 2025Month: 2025-05 — Monthly summary for facebook/fboss focusing on business value, reliability, and technical accomplishments. Key achievements delivered this month: - End-to-end Switch pipeline monitoring and statistics subsystem: implemented initialization loading of switch pipeline objects during agent startup, added collection and publishing of pipeline counters via fb303, and enhanced tracing for switch pipeline operations to improve visibility and performance monitoring. This work spans multiple commits to load, replayer support, hardware_stats integration, and publication of stats (e.g., 49305f7a4a11aafb02b9889e2fde124b7575e2f9; fc49a41c2065930b961c69636b370dc0853d7797; 49be96969407c31d7ed34b07ea7b1ce377112c91; d2fa94f5c3961e736cffe782630b756ad638737f; 4da14cb07fde38dfe5fa5e5b668e99f11ff3127a; 460d64fa83a5c0a33bede9aa8dd069d710d5fdd3; bb0152ce019b97ee274d3e1eb5ffe400123b1f3e). - 400G copper port profile for Darwin platform mapping: introduced a new 400G copper port profile to support high-speed connectivity and scalability for Darwin-based hardware (857e68a4a5daac5a7231050e8e8cb5ca18c8324e). - Thrift method rate limiting library: added a token bucket based rate-limiter for Thrift method calls to protect services from overuse, with unit tests validating constructor behavior and integration (4fbf3e9a272b45fed80ba3dd9b4505c109d34276; dcccd2d70fbebc5432e6647e8af8cb313a03e589). - Test framework reliability fix: ensured the test suite includes all tests by fixing missing test cases from bcm_multinode_test build, improving test coverage and reliability (48f23bbab68af81961ccdc348aec713d28fb31d0). Major business impact: - Improved observability and performance visibility of switch pipeline operations, enabling faster issue diagnosis and optimization. - Enabled higher-bandwidth hardware support, expanding platform capabilities and future-proofing for scalable deployments. - Strengthened system resilience against misuse and load bursts through rate limiting, reducing risk of service degradation. - Increased test suite reliability, improving confidence in release quality and reducing post-merge defects. Technologies demonstrated: - fb303, hardware_stats.thrift integration, SwSwitch, SAI replayer support, and init-time object loading. - Thrift-based rate limiting (token bucket) with unit tests. - C++ development practices, test harness maintenance, and platform mapping contributions.
April 2025
23 Commits • 5 Features
Apr 1, 2025April 2025 fboss monthly recap: Focused on delivering robust rate-limiting controls, expanded telemetry, targeted stability fixes, and enhanced COPP test coverage to enable safer feature rollout and clearer business value realization. Key work spanned global rate-limiting, system-port lifecycle handling, switch-state telemetry, COPP validation, and SAI-driven observability.
23 Commits • 5 Features
Apr 1, 2025April 2025 fboss monthly recap: Focused on delivering robust rate-limiting controls, expanded telemetry, targeted stability fixes, and enhanced COPP test coverage to enable safer feature rollout and clearer business value realization. Key work spanned global rate-limiting, system-port lifecycle handling, switch-state telemetry, COPP validation, and SAI-driven observability.
April 2025
March 2025
12 Commits • 4 Features
Mar 1, 2025March 2025 highlights for facebook/fboss: Delivered scalable traffic management features, stabilized high-speed port operation, and expanded benchmarking and test coverage, while improving code readability. Key achievements include enabling global traffic class rate limiting via new SAI attributes and switch_config wiring; stabilizing fboss agent on minipack3 with 100G ports; enhancing system-scale benchmarks with ThriftHandler-based FIB synchronization and timing measurements; broadening QoS test coverage with DSCP queue mapping tests and test base refactor; and renaming fabric connectivity counters for clarity to improve maintainability.
March 2025
12 Commits • 4 Features
Mar 1, 2025March 2025 highlights for facebook/fboss: Delivered scalable traffic management features, stabilized high-speed port operation, and expanded benchmarking and test coverage, while improving code readability. Key achievements include enabling global traffic class rate limiting via new SAI attributes and switch_config wiring; stabilizing fboss agent on minipack3 with 100G ports; enhancing system-scale benchmarks with ThriftHandler-based FIB synchronization and timing measurements; broadening QoS test coverage with DSCP queue mapping tests and test base refactor; and renaming fabric connectivity counters for clarity to improve maintainability.
February 2025
9 Commits • 3 Features
Feb 1, 2025February 2025 – fboss (facebook/fboss) monthly dedication focused on Network AI QoS capabilities, reliability, and production readiness. Key outcomes include: advanced QoS scheduling enhancements with refactoring and test scaffolding, feature flag gating for production readiness, and targeted fixes to improve stability and hardware provisioning workflows.
9 Commits • 3 Features
Feb 1, 2025February 2025 – fboss (facebook/fboss) monthly dedication focused on Network AI QoS capabilities, reliability, and production readiness. Key outcomes include: advanced QoS scheduling enhancements with refactoring and test scaffolding, feature flag gating for production readiness, and targeted fixes to improve stability and hardware provisioning workflows.
February 2025
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Quality Metrics
Correctness94.0%
Maintainability84.4%
Architecture86.0%
Performance84.4%
AI Usage47.8%
Skills & Technologies
Programming Languages
C++CMakeCSVJSONMarkdownPythonThrift
Technical Skills
API DevelopmentAPI designAPI developmentAPI rate limitingBackend DevelopmentBuild SystemsC++C++ ProgrammingC++ developmentC++ programmingCLI DevelopmentCLI developmentCMakeCSV manipulationConfiguration Management
Repositories Contributed To
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