17.01.06 Go4 v3 - http://go4.gsi.de 1

J.Adamczewski, H.G.Essel, S.Linev

IT/EE Palaver

Go4 version 3

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Go4 v3

• Go4 features

• Status of usage

• Analysis framework review

• New developments for v.3.0

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• Framework for many kinds of experiments (Atomic & Nuclear Physics)

• The analysis is written by the user (unlimited ROOT)

• Services and interfaces for analysis

• Batch mode (CINT or compiled, on/off-line)

• Interactive mode (on/off-line):

• A non blocking GUI controls and steers the analysis

• Analysis runs independently and can update graphics asynchronously

• ROOT object transport between analysis and GUI task

• Qt based GUI interfaces ROOT and Qt graphics

• User defined GUI supported (Qt designer)

The Go4 features

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Screenshot of Go4 v3

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Go4 history and status

• Development start: April 1999• Go4 v.1.0 May 2002• Go4 v.2.0 November 2002• Go4 v.2.9 April 2005 (stable?)• Go4 v.3.0 (and “final” v2.10) December 2005 • Users:

– At GSI: FRS, SHIP, AP, ESR, Rising, HypHi, HADES online, ...

– Outside: TU Darmstadt, Uni Mainz, Uni Giessen, INFN Milano, Weizman institute, IMPCAS,...

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Analysis framework

• TGo4Analysis baseclass:

• Analysis setup (chain of analysis steps)

• Object organization, dynamic histograms

• Implicit / explicit event loop

• Virtual methods to be defined in user analysis subclass

• TGo4AnalysisStep:defines one stage of the analysis,implements event classes

User may design own subclass of TGo4Analysis

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Analysis steps

TUserAnalysis

TGo4Analysis

Step

Input

Process

Output

Step

Input

Process

Output

Step

Input

Process

Output

TObjArray

Factory1

Init.

Factory2

Init.

FactoryN

Init.

Steps definition and control Framework

User Code

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Analysis steps

input

outputprocess

input

outputprocess

input

outputprocess

Chain of analysis steps processed sequentiallyEach step can be en/disabled (framework)Input/output can be switched (framework)

Each processor has access to all inputs!Each processor has access to all parameters

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Analysis Setup from GUI

Step selection

Event input

Event output

Object persistency

Load/save config

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• GSI standard DAQ (Mbs)

TGo4MbsEvent, TGo4MbsSubEvent (format 10,1)

TGo4MbsFile (read from *.lmd)

TGo4MbsEventServer, TGo4MbsStream, TGo4MbsTransport (connect to Mbs)

TGo4RevServ (connect to remote event server mrevserv)

• Complex event structures „toolbox“: TGo4CompositeEvent

• Root I/O :

• TGo4FileSource, TGo4FileStore :wraps 1 TTree in 1 TFile

• TGo4BackStore :1 TTree in memory only ( <- online TTree::Draw() )

Implemented Services

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Developments for v.3

• Inter-task communication redesign: multiple viewers at one analysis server

• New Object manager for GUI organization: decoupling of functionality and surface

• Redesign of GUI elements: browser, viewpanel, editors, new MBS monitor,...

• ROOT session (macro) may be controlled by Go4 GUI• ROOT session (TBrowser) may control Go4 analysis • Go4 distribution for Windows XP (without Qt!)

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Improved communication mechanism

TSocket (3x)

CL

IEN

T T

ask Go4 GUI

Object manager

CL

IEN

T T

ask Go4 GUI

Object manager

CL

IEN

T T

ask Go4 GUI

Object manager

N Observer processes

Analysis process

Event IO:- DAQ

- Server- Files- User

Auto save file

SE

RV

ER

Tas

kANALYSIS loop

Object manager

Login port

CommandsObjects

connect request

connect request

CL

IEN

T T

ask Go4 GUI

Object manager

1 Controller process

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GUI object managerGUI OM

data sources

browser

file.root

Analysis

file.root

Analysis

histo1

histo2

histo3

Parameter1widgets

Qt browser

view panel 1

parameter editor

• hierarchical structure of containers• special proxies for different data

sources• single iterator for looping over

complete structure• message passing between different

branches for notification purposes• ROOT cleanup mechanism

Supported data sources:• TFolder• TDirectory (TFile)• TTree• TCanvas• Remote Go4 analysis• GSI histogram server

TSocket connection

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New Go4 browser

• Implemented as special OM proxyfunctionality independent from graphical surface

• One browser for all data sources (analysis, file, histogram server, memory,...)

• Full control by context menu • Properties displayed in definable columns• Monitoring is set as object property • Object filter tool by state (monitored, fetched, all) • Local memory workspace with user subdirectories

copy & paste, drag’n drop, create subdir, rename

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New Go4 browserbrowser

column popup

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New Go4 browser

context menu

monitor and filter tool

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View panel

• View management done by object manager

• Show same histogram in different views

(ranges, line and fill

colors) • Improved marker editor,

may also edit conditions• Info on time/date and full

object path

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Condition editor

2D polygon

1D limits

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Parameter editor Remote editing of object (data structure) contents

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Dynamic list editor

Histogramming “on the fly”

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New Mbs status monitor

Online event ratemeters, trending, remotely inspect status and setup

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Remote dispatching of ROOT macro

Go4 GUI

hsimplego4.CROOT

run control

browser

rate monitor

object monitor

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Remote dispatching of ROOT macro

• Use regular ROOT session• Init script to loads Go4 libraries and starts up analysis server task

[root] .x go4Init.C

• All methods of TGo4Analysis::Instance() available in CINT via go4->...(),

• Register Root objects in CINT / analysis script: go4RegisterAll() (all histograms in root memory), or go4->AddHistogram(TH1*), go4-

>AddObject(TNamed*),...

• Optional run control methods for macro: go4->WaitForStart() - suspend macro until start button pressed

go4->Process() - break eventloop when stop button pressed

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ROOT (TBrowser) for Go4 control

ROOT

ROOT

object monitorGo4 menu

run control

hsimplego4.C

Go4 folders

Go4 analysis

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ROOT for remote analysis control

• Use regular ROOT session• Instantiate TGo4Interface instance

[root] TGo4Interface::Instance() • Connect to running analysis

[root] go4->ConnectAnalysis(“host.domain”, 5000, 2);

• Create TBrowser instance: [root] new TBrowser

• ROOT TBrowser will contain “go4” folder, where all objects in analysis will be displayed

• CINT API (go4->...) for remote controlLaunchAnalysis(..), ConnectAnalysis(..),

SubmitAnalysisConfig(), StartAnalysis(), StopAnalysis(), ExecuteLine(....),...

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Conclusions• Go4 well established as GSI “standard” analysis framework • v2.10: development finished, used in production• new v.3.0:

– First internal redesign stage (OM, communication)– GUI layout and functionality improved– Other graphical surfaces than Qt? possible now!– ROOT session can control Go4 analysis– ROOT macros can be controlled from Go4 GUI– Port to other OS than Linux?

WindowsXP partially done; MacOS(?)• v3.0 to do:

– Testing, bug fixes, user interface improvements– Replace analysis object management with new OM– Redesign of analysis framework?

Backward compatibility!

• Go4 v3.0 released and available at http://go4.gsi.de