D0 Online Event Monitoring Histogram Control Flow

Reset

Update

Display

Input

Select

Save

Step Hists.

Cycle Hists

Print

Compare

DD

Initialize

Process

Events

Finish

Repeat

Event Buffer

Assigned at

the Requests

Histogram

Interface

Request Message

Control Message

Commentary

Histogram Port

Initiate

a thread

Data Flow

Monitoring PC-Nodes

DD Host

ROOT

GUI Histogram Control Nodes

Process

Registry

Register

ReadEvent

Daq

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