facebook/fboss
Feb 2025 – Jun 2026
17 Months active
Languages Used
C++PythonThriftCMake
Technical Skills
C++C++ developmentSoftware DevelopmentSystem IntegrationTestingbuild system configuration
Prasoon Patel
PROFILE
Prasoon Patel
Over 17 months, contributed to the facebook/fboss repository by building and modernizing core networking features, test frameworks, and diagnostic tooling. Delivered robust C++ and Python solutions for API development, asynchronous programming, and hardware integration, focusing on scalable test automation and system reliability. Migrated legacy tests to unified Agent-based frameworks, enhanced monitoring with new validation cases, and improved artifact management for efficient CI workflows. Addressed critical bugs in warm-boot flows, neighbor discovery, and conveyor reliability, while expanding multi-switch and hardware-inclusive test coverage. The work emphasized maintainable code, thorough test design, and cross-team collaboration to support safer, faster network deployments.
Overall Statistics
Feature vs Bugs
74%Features
Repository Contributions
137Total
Bugs
19
Commits
137
Features
53
Lines of code
63,349
Activity Months17
Your Network
3299 peopleSame Organization
@meta.com3012
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Shared Repositories
287
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Ashutosh GrewalMember
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Work History
June 2026
9 Commits • 1 Features
Jun 1, 2026June 2026 monthly performance highlights for facebook/fboss: expanded monitoring validation by delivering nine new HwMirrorTest cases to validate mirror behavior across diverse real-world scenarios, strengthening observability and reliability.
9 Commits • 1 Features
Jun 1, 2026June 2026 monthly performance highlights for facebook/fboss: expanded monitoring validation by delivering nine new HwMirrorTest cases to validate mirror behavior across diverse real-world scenarios, strengthening observability and reliability.
June 2026
May 2026
49 Commits • 23 Features
May 1, 2026Month 2026-05 performance summary: Delivered a broad wave of migrations to Agent-based tests (AgentHwTest/AgentHwMirrorTest) and associated infra, enhanced stability and reliability, and expanded feature verification, yielding more scalable cross-switch validation and reduced teardown risks. Key architectural changes unify test flows, improve multi-switch consistency, and strengthen business value through faster, more reliable validation of features across FBOSS-supported hardware.
May 2026
49 Commits • 23 Features
May 1, 2026Month 2026-05 performance summary: Delivered a broad wave of migrations to Agent-based tests (AgentHwTest/AgentHwMirrorTest) and associated infra, enhanced stability and reliability, and expanded feature verification, yielding more scalable cross-switch validation and reduced teardown risks. Key architectural changes unify test flows, improve multi-switch consistency, and strengthen business value through faster, more reliable validation of features across FBOSS-supported hardware.
April 2026
2 Commits • 1 Features
Apr 1, 2026April 2026 performance summary for facebook/fboss focusing on multi-switch reliability, test robustness, and warm-boot stability. Delivered fixes and enhancements with clear business value: reduced warm-boot risk, more reliable route statistics validation, and stronger state consistency guarantees across MAC/NDP paths.
2 Commits • 1 Features
Apr 1, 2026April 2026 performance summary for facebook/fboss focusing on multi-switch reliability, test robustness, and warm-boot stability. Delivered fixes and enhancements with clear business value: reduced warm-boot risk, more reliable route statistics validation, and stronger state consistency guarantees across MAC/NDP paths.
April 2026
March 2026
5 Commits • 1 Features
Mar 1, 2026March 2026 Monthly Summary for facebook/fboss: Delivered robust testing infrastructure enhancements and critical reliability fixes, accelerating hardware-inclusive testing and stabilizing the Fboss Agent conveyor. The work supports faster feedback cycles, higher test coverage, and increased deployment confidence across fboss product lines. Key achievements (top 3-5): - Testing Infrastructure and Known-Bad Test Reporting Enhancements: Implemented hardware agent artifact builds for tests across fboss product lines and improved known_bad_test_report tooling for parsing and readability. Included new link test name parsing and agent/qsfp test name parsing to enable precise known-bad test identification. Commits include 315b7cc5..., 71837d0f..., 8968b2bc... (D92679341, D97252791, D97252792). - Fsdb Conveyor Reliability Improvement: Fixed an existing conveyor failure by adding a configurable samplingRate to the fsdb model thriftpath to enable controlled sampling. Commit: d5243975... (D96656033). - Fboss Agent Conveyor RTT Null Pointer Fix: Hardening of neighbor-table handling to prevent RTT node failures by replacing null pointers with empty tables in SwitchState.cpp. Commit: a13c82c2... (D96657508). Overall impact and accomplishments: - Reduced test flake risk and improved visibility into known-bad tests, enabling faster triage and remediation. - Increased stability of the Fsdb conveyor and agent data path, reducing production risk due to sampling-related failures. - Strengthened runtime robustness of the agent conveyor, mitigating RTT-related outages and improving state-transition resilience. Technologies/skills demonstrated: - C++ state management in fbcode/fboss (SwitchState.cpp) and thriftpath integration for fsdb model changes. - Python-based test tooling improvements (known_bad_test_report.py) and regular-expression-based parsing enhancements. - Test infrastructure provisioning and artifact management for hardware-in-the-loop testing. - Code review collaboration and cross-team coordination (D revisions and reviews).
March 2026
5 Commits • 1 Features
Mar 1, 2026March 2026 Monthly Summary for facebook/fboss: Delivered robust testing infrastructure enhancements and critical reliability fixes, accelerating hardware-inclusive testing and stabilizing the Fboss Agent conveyor. The work supports faster feedback cycles, higher test coverage, and increased deployment confidence across fboss product lines. Key achievements (top 3-5): - Testing Infrastructure and Known-Bad Test Reporting Enhancements: Implemented hardware agent artifact builds for tests across fboss product lines and improved known_bad_test_report tooling for parsing and readability. Included new link test name parsing and agent/qsfp test name parsing to enable precise known-bad test identification. Commits include 315b7cc5..., 71837d0f..., 8968b2bc... (D92679341, D97252791, D97252792). - Fsdb Conveyor Reliability Improvement: Fixed an existing conveyor failure by adding a configurable samplingRate to the fsdb model thriftpath to enable controlled sampling. Commit: d5243975... (D96656033). - Fboss Agent Conveyor RTT Null Pointer Fix: Hardening of neighbor-table handling to prevent RTT node failures by replacing null pointers with empty tables in SwitchState.cpp. Commit: a13c82c2... (D96657508). Overall impact and accomplishments: - Reduced test flake risk and improved visibility into known-bad tests, enabling faster triage and remediation. - Increased stability of the Fsdb conveyor and agent data path, reducing production risk due to sampling-related failures. - Strengthened runtime robustness of the agent conveyor, mitigating RTT-related outages and improving state-transition resilience. Technologies/skills demonstrated: - C++ state management in fbcode/fboss (SwitchState.cpp) and thriftpath integration for fsdb model changes. - Python-based test tooling improvements (known_bad_test_report.py) and regular-expression-based parsing enhancements. - Test infrastructure provisioning and artifact management for hardware-in-the-loop testing. - Code review collaboration and cross-team coordination (D revisions and reviews).
February 2026
1 Commits
Feb 1, 2026February 2026 monthly summary for facebook/fboss focused on artifact hygiene and test reliability. Delivered a targeted artifact size reduction by removing an outdated binary (sai_invariant_agent_test), with all tests updated to reference the new binaries sai_invariant_agent_test_mono and sai_invariant_agent_test_multi_switch. This cleanup reduces artifact size by ~2GB, improving CI download/install times and storage efficiency. The change was committed in 60cb29c7124ce4e27741dca6fd2c5f4590ae8a30 with message 'Remove old binary from artifact' and reviewed by jasmeetbagga; Differential Revision: D92068413. Overall impact includes faster builds, lower storage costs, and more maintainable release artifacts.
1 Commits
Feb 1, 2026February 2026 monthly summary for facebook/fboss focused on artifact hygiene and test reliability. Delivered a targeted artifact size reduction by removing an outdated binary (sai_invariant_agent_test), with all tests updated to reference the new binaries sai_invariant_agent_test_mono and sai_invariant_agent_test_multi_switch. This cleanup reduces artifact size by ~2GB, improving CI download/install times and storage efficiency. The change was committed in 60cb29c7124ce4e27741dca6fd2c5f4590ae8a30 with message 'Remove old binary from artifact' and reviewed by jasmeetbagga; Differential Revision: D92068413. Overall impact includes faster builds, lower storage costs, and more maintainable release artifacts.
February 2026
January 2026
2 Commits
Jan 1, 2026January 2026 (Month: 2026-01) focus: stabilize test reliability in facebook/fboss and remove legacy flags to prevent warm-boot conflicts. Delivered two critical bug fixes with clear, reviewable commits that improved CI stability and warm boot reliability across mono and multi-switch configurations, enabling safer deployments and faster iteration cycles.
January 2026
2 Commits
Jan 1, 2026January 2026 (Month: 2026-01) focus: stabilize test reliability in facebook/fboss and remove legacy flags to prevent warm-boot conflicts. Delivered two critical bug fixes with clear, reviewable commits that improved CI stability and warm boot reliability across mono and multi-switch configurations, enabling safer deployments and faster iteration cycles.
December 2025
5 Commits • 3 Features
Dec 1, 2025December 2025: Focused on reliability, test framework modernization, and cross-configuration validation in facebook/fboss, delivering core protocol robustness, test consolidation, and expanded multi-switch test coverage.
5 Commits • 3 Features
Dec 1, 2025December 2025: Focused on reliability, test framework modernization, and cross-configuration validation in facebook/fboss, delivering core protocol robustness, test consolidation, and expanded multi-switch test coverage.
December 2025
November 2025
10 Commits • 2 Features
Nov 1, 2025Month: 2025-11 — This month delivered substantial gains in PRBS (pseudo-random binary sequence) testing capabilities for the facebook/fboss project, with a focus on port-level diagnostics and scalable multi-switch support. Highlights include new retrieval and clear APIs for PRBS state, polynomials, and ASIC statistics on SAI/BCM devices, plus multi-switch thrift APIs and test utilities to orchestrate PRBS tests across multiple switches. These changes reduce diagnostic time, improve fault isolation, and lay groundwork for scalable testing in multi-switch environments.
November 2025
10 Commits • 2 Features
Nov 1, 2025Month: 2025-11 — This month delivered substantial gains in PRBS (pseudo-random binary sequence) testing capabilities for the facebook/fboss project, with a focus on port-level diagnostics and scalable multi-switch support. Highlights include new retrieval and clear APIs for PRBS state, polynomials, and ASIC statistics on SAI/BCM devices, plus multi-switch thrift APIs and test utilities to orchestrate PRBS tests across multiple switches. These changes reduce diagnostic time, improve fault isolation, and lay groundwork for scalable testing in multi-switch environments.
October 2025
22 Commits • 3 Features
Oct 1, 2025October 2025 (facebook/fboss): Delivered significant NDP enhancements for GPU-focused connectivity, improved warm-boot resilience, expanded interface support, and strengthened stability and test coverage. The month focused on delivering business-critical reliability and performance gains for network neighbor resolution, particularly in DSF/MTIA environments, while expanding observability and test quality. Key achievements and outcomes: - NDP enhancements for GPU connectivity: Gate NDP NS by feature flag, NDP cold start handling, retry/probes logic, public getMaxNeighborProbes, and neighbor probe info added to thrift; warmboot support for NS of hosts. - Warmboot recovery: Implemented warmboot flow to re-solicit neighbor discovery on configured interfaces, expediting restoration of connectivity after reboot. - Interface management and utilities: Added hasConfiguredDesiredPeers utility, updated updateInterface to reflect changes in desiredPeer, and extended InterfaceDetail with optional desiredPeerAddressIPv6 plus a get API for it to support NDP audit and netstate accuracy. - Stability and performance improvements: Fixed sw-agent crash when no hw-agent is found during disconnect; avoided scheduling NDP slowRetries when all ports are down; refined RTT handling in tests to improve reliability. - Testing and quality uplift: Added unit tests for VLAN/interface/system port interfaces; expanded NDP-related test coverage and fixed failing tests in AgentEnsembleMacLearningTest; overall improvement in test robustness and maintainability. Impact and business value: - Increased neighbor resolution reliability for GPU interconnects, reducing onboarding time and downtime in DSF/MTIA clusters. - Faster recovery after warm boots and configuration changes, leading to higher switch availability and customer trust. - More actionable observability through thrift-provided probe data and interface-level desiredPeer details, enabling better monitoring and audit. Technologies and skills demonstrated: - C++/FBOSS agent work, thrift data modeling, feature-flag governance, and warm-boot orchestration. - Comprehensive unit and integration test design, test fixtures, and CI stability improvements. - Proactive performance tuning and defensive programming to prevent crashes and reduce unnecessary retries.
22 Commits • 3 Features
Oct 1, 2025October 2025 (facebook/fboss): Delivered significant NDP enhancements for GPU-focused connectivity, improved warm-boot resilience, expanded interface support, and strengthened stability and test coverage. The month focused on delivering business-critical reliability and performance gains for network neighbor resolution, particularly in DSF/MTIA environments, while expanding observability and test quality. Key achievements and outcomes: - NDP enhancements for GPU connectivity: Gate NDP NS by feature flag, NDP cold start handling, retry/probes logic, public getMaxNeighborProbes, and neighbor probe info added to thrift; warmboot support for NS of hosts. - Warmboot recovery: Implemented warmboot flow to re-solicit neighbor discovery on configured interfaces, expediting restoration of connectivity after reboot. - Interface management and utilities: Added hasConfiguredDesiredPeers utility, updated updateInterface to reflect changes in desiredPeer, and extended InterfaceDetail with optional desiredPeerAddressIPv6 plus a get API for it to support NDP audit and netstate accuracy. - Stability and performance improvements: Fixed sw-agent crash when no hw-agent is found during disconnect; avoided scheduling NDP slowRetries when all ports are down; refined RTT handling in tests to improve reliability. - Testing and quality uplift: Added unit tests for VLAN/interface/system port interfaces; expanded NDP-related test coverage and fixed failing tests in AgentEnsembleMacLearningTest; overall improvement in test robustness and maintainability. Impact and business value: - Increased neighbor resolution reliability for GPU interconnects, reducing onboarding time and downtime in DSF/MTIA clusters. - Faster recovery after warm boots and configuration changes, leading to higher switch availability and customer trust. - More actionable observability through thrift-provided probe data and interface-level desiredPeer details, enabling better monitoring and audit. Technologies and skills demonstrated: - C++/FBOSS agent work, thrift data modeling, feature-flag governance, and warm-boot orchestration. - Comprehensive unit and integration test design, test fixtures, and CI stability improvements. - Proactive performance tuning and defensive programming to prevent crashes and reduce unnecessary retries.
October 2025
September 2025
7 Commits • 3 Features
Sep 1, 2025In September 2025, delivered feature work focusing on dynamic peer configuration, enhanced monitoring, and monthly test reporting for fboss. The work emphasizes reliability, operability, and clear business value through automated configuration propagation, API exposure for peer data, improved monthly testing analytics, and visibility into route programming outcomes.
September 2025
7 Commits • 3 Features
Sep 1, 2025In September 2025, delivered feature work focusing on dynamic peer configuration, enhanced monitoring, and monthly test reporting for fboss. The work emphasizes reliability, operability, and clear business value through automated configuration propagation, API exposure for peer data, improved monthly testing analytics, and visibility into route programming outcomes.
August 2025
4 Commits • 3 Features
Aug 1, 2025August 2025 monthly summary for facebook/fboss focusing on delivering automation enhancements, reliability improvements, and monitoring enhancements across LACP and thrift client connections. Key outcomes include added CLI-based notification capability, improved LACP transmission behavior and test coverage, and enhanced heartbeat monitoring for thrift clients, contributing to reduced downtime and faster incident detection.
4 Commits • 3 Features
Aug 1, 2025August 2025 monthly summary for facebook/fboss focusing on delivering automation enhancements, reliability improvements, and monitoring enhancements across LACP and thrift client connections. Key outcomes include added CLI-based notification capability, improved LACP transmission behavior and test coverage, and enhanced heartbeat monitoring for thrift clients, contributing to reduced downtime and faster incident detection.
August 2025
July 2025
4 Commits • 2 Features
Jul 1, 2025July 2025 summary for facebook/fboss: Delivered VLAN-aware population of ARP/NDP neighbor caches by integrating VLAN support into neighbor cache population; refactored NeighborUpdater for modularity; added tests validating neighbor resolution across VLANs; updated notification emails to include only test names for concise reports. Key commits included: 4a109c8, 05a9447, 5f83b13, eef026b.
July 2025
4 Commits • 2 Features
Jul 1, 2025July 2025 summary for facebook/fboss: Delivered VLAN-aware population of ARP/NDP neighbor caches by integrating VLAN support into neighbor cache population; refactored NeighborUpdater for modularity; added tests validating neighbor resolution across VLANs; updated notification emails to include only test names for concise reports. Key commits included: 4a109c8, 05a9447, 5f83b13, eef026b.
June 2025
4 Commits • 3 Features
Jun 1, 2025June 2025 monthly summary for facebook/fboss focused on fabric connectivity reliability, validation, and maintenance. Delivered direct hw-agent-backed fabric connectivity retrieval, fixed a critical ingressVlan copy bug that affected speed-change tests, removed stale TE agent references to streamline the codebase, and enhanced fabric port validation with expectedNeighborReachability checks. These changes reduce data latency, improve test accuracy, and lower maintenance costs, reinforcing reliable fabric operations and faster deployment cycles. Technologies demonstrated include refactoring, API integration with the hardware agent, regression test hardening, and code cleanup.
4 Commits • 3 Features
Jun 1, 2025June 2025 monthly summary for facebook/fboss focused on fabric connectivity reliability, validation, and maintenance. Delivered direct hw-agent-backed fabric connectivity retrieval, fixed a critical ingressVlan copy bug that affected speed-change tests, removed stale TE agent references to streamline the codebase, and enhanced fabric port validation with expectedNeighborReachability checks. These changes reduce data latency, improve test accuracy, and lower maintenance costs, reinforcing reliable fabric operations and faster deployment cycles. Technologies demonstrated include refactoring, API integration with the hardware agent, regression test hardening, and code cleanup.
June 2025
May 2025
1 Commits • 1 Features
May 1, 2025May 2025 monthly summary for facebook/fboss: Delivered modernization of BGP routing integration tests by migrating to the ensemble framework, improving test structure, maintainability, state management, and resource handling. This work reduces testing friction, enhances reliability of routing validation, and supports faster feedback for deployments.
May 2025
1 Commits • 1 Features
May 1, 2025May 2025 monthly summary for facebook/fboss: Delivered modernization of BGP routing integration tests by migrating to the ensemble framework, improving test structure, maintainability, state management, and resource handling. This work reduces testing friction, enhances reliability of routing validation, and supports faster feedback for deployments.
April 2025
7 Commits • 4 Features
Apr 1, 2025April 2025: Focused on reliability, scalability, and test realism for facebook/fboss. Key changes hardened neighbor cache updates with hardware failure protection and improved logging; added NDP/ARP table size limits in Resource Accountant to prevent overuse; aligned warm-boot tests with production configuration to exercise real user configs and improve reliability; enhanced Packet Snooper to capture and validate PTP packets for accurate traffic handling; resolved build/test blockers (BCM benchmark dependencies) and strengthened LACP flap tests by guarding against missing aggregate ports. These changes reduce risk during deployment, improve predictability under failure, and tighten test coverage.
7 Commits • 4 Features
Apr 1, 2025April 2025: Focused on reliability, scalability, and test realism for facebook/fboss. Key changes hardened neighbor cache updates with hardware failure protection and improved logging; added NDP/ARP table size limits in Resource Accountant to prevent overuse; aligned warm-boot tests with production configuration to exercise real user configs and improve reliability; enhanced Packet Snooper to capture and validate PTP packets for accurate traffic handling; resolved build/test blockers (BCM benchmark dependencies) and strengthened LACP flap tests by guarding against missing aggregate ports. These changes reduce risk during deployment, improve predictability under failure, and tighten test coverage.
April 2025
March 2025
1 Commits • 1 Features
Mar 1, 2025Month: 2025-03 — Key delivery: Implemented a new Thrift API method getPtpTcEnabled for the Agent hardware tests in facebook/fboss, enabling checks whether PTP TC is enabled in hardware test paths. This expands test coverage for PTP-related functionalities and improves validation fidelity across the hardware testing pipeline. Commit da58647cf8f6b17d60147146dcf790343e887874 (add thrift api getPtpTcEnabled for Agent hw ptpTc tests).
March 2025
1 Commits • 1 Features
Mar 1, 2025Month: 2025-03 — Key delivery: Implemented a new Thrift API method getPtpTcEnabled for the Agent hardware tests in facebook/fboss, enabling checks whether PTP TC is enabled in hardware test paths. This expands test coverage for PTP-related functionalities and improves validation fidelity across the hardware testing pipeline. Commit da58647cf8f6b17d60147146dcf790343e887874 (add thrift api getPtpTcEnabled for Agent hw ptpTc tests).
February 2025
4 Commits • 2 Features
Feb 1, 2025February 2025: Delivered enhancements to the production agent test framework, centralized feature flag definitions, and reliability improvements for the networking path in facebook/fboss. These changes strengthen test coverage, standardize configuration, and enhance stability for safer, faster deployments.
4 Commits • 2 Features
Feb 1, 2025February 2025: Delivered enhancements to the production agent test framework, centralized feature flag definitions, and reliability improvements for the networking path in facebook/fboss. These changes strengthen test coverage, standardize configuration, and enhance stability for safer, faster deployments.
February 2025
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Quality Metrics
Correctness93.6%
Maintainability85.8%
Architecture86.0%
Performance85.8%
AI Usage35.8%
Skills & Technologies
Programming Languages
C++CMakePythonThrift
Technical Skills
API designAPI developmentAsynchronous ProgrammingBGPC++C++ developmentCLI DevelopmentCMakeData ReportingEmail HandlingEmbedded systemsHardware TestingNetwork ProgrammingNetwork programmingNetworking
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