CREAM data

CREAM data

Zero suppression

After L1 the data from the CREAMs is requested with so called MRPs. These store a flag called requestZeroSuppressed which can be set in two different ways:

Global setting

The farm can be started with a flag called --sendMRPsWithZSuppressionFlag. Set to 0 no zero suppressed data will be requested. If set to true it depends on the following setting:

L1 word specific setting

If --sendMRPsWithZSuppressionFlag is set to 1 you can still request non zero suppressed data by returning false in the method L1TriggerProcessor::isRequestZeroSuppressedCreamData.

Currently the default behaviour is that all bypassed events are automatically requesting zero suppressed data. If you want to request non zero suppressed data for the specific L1 trigger type word MY_WORD you could change the code to something similar to following

return l1TriggerTypeWord != TRIGGER_L1_BYPASS && l1TriggerTypeWord != MY_WORD;