Marie Curie, CMS & I : When People and Ideas Come Together Yi Ling Hwong CMS DAQ DCS

Outline About the researcher Technical work Training Dissemination Impact

About The Researcher ...

About the researcher Malaysia 27ºC average temperature Tropical rainforest vs. Petronas twin tower About me blah blah

How did I get here? Malaysia -> Germany -> CERN -> ?

Technical Work

CMS Detector Control System CMS – Compact Muon Solenoid One of the four large experiments of the LHC Detector Control System (DCS) A set of policies governing and managing all activities Scope: All sub-systems, electronics, etc

Task and Objectives To develop a toolset to automatically analyze and verify the Finite State Machine (FSM) system of the Detector Control System of the CMS experiment Goal: Optimization of the current FSM system

Finite State Machines (FSM) Automata modelling the Detector Control System (DCS) “The real world is view as a collection of objects behaving as Finite State Machines.” Parent / children interface Command down, state up Written in State Manager Language (SML) CMS DCS contains 30,000 FSMs!

The birth of FiSMAT™ Large system + different sub-detector groups + diversity in development philosophy = Recipe for error Analysis of such a system is hard ... but not impossible  With great people come great ideas Collaboration with TUe FiSMAT was born Finite State Machine Analysis Toolkit

FiSMAT™ – What is it? A set of command-line tools which can be used to analyse Finite State Machines written in the State Manager Language (SML) Utilizes formal verification methods Aims to help developers by giving them tools that can automatically verify certain properties of FSMs

FiSMAT™ - Technology Used mCRL2 – micro Common Representation Language 2 Formal specification language Associated toolset for modelling, simulation, verification BMC - Bounded Model Checking “check for a counterexample in runs of length for a fixed number of steps k and check whether a property violation can occur in k or fewer steps” Encode the model as boolean Satisfiability (SAT) problem

Properties Verification Automatic translation of SML into: mCRL2 – global properties checking Boolean formula (SAT problem) – local properties checking So far we have developed tools to check following requirements There are no unreachable state There are no endless-loops There are no states we can never leave Enthusiastic feedback from group

Trainings & Disseminations

Complementary Training Formal Training Oracle SQL course: 02.02.2009 – 06.02.2009 PVSS JCOP Framework course: 09.02.2009 – 13.02.2009 FSM course: 16.02.2009 – 20.02.2009 JAVA Level 1: 27.04.2009 – 30.04.2009 Professional French course level 2 Professional French course level 4 Professional French course level B1 Presentation course (How to make a poster) Leader in Science – confidence building course Complementary Training

Collaboration establishment Technical University of Eindhoven (TUe), Netherlands Writing of proposal Organization of meeting at CERN and at TUe Application of mCRL2 in FiSMAT Training trips to Eindhoven Participation in discussion of mCRL2 tool development Supervision of student from TUe – development of FiSMAT Co-author of papers

Papers and Presentations “An Analysis of the Control Hierarchy Modelling of the CMS Detector Control System” – Paper and Poster, ICALEPCS, Japan 2009 “FiSMAT – Finite State Machine Analysis Toolkit” – Poster, ESOF Marie Curie Conference, Torino 2010 “An Analysis of the Control Hierarchy Modelling of the CMS Detector Control System” – Paper and talk, CHEP, Taiwan 2010 “Towards the Verification of the Control Software of the CMS Experiment at the Large Hadron Collider” – Paper, SAC 2010 CMS week presentation

Teaching and Organization ISOTDAQ school – lab instructor, Ankara 2010 Upcoming: ISOTDAQ school – lab instructor, Rome 2011 Upcoming: Organization of ACEOLE booth at CHEP 2010 Upcoming: ACEOLE II

Impact

Connections Contributions Collaboration Company Career Courage The 6 C’s Connections Contributions Collaboration Company Career Courage

... and the journey continues ... Question?