0000447: JEvent:event_number should be 64 bit

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0000447

JANA

Feature Request

public

2015-01-26 08:12

2015-06-09 16:52

Reporter

davidl

Assigned To

davidl

Priority

normal

Severity

minor

Reproducibility

N/A

Status

resolved

Resolution

fixed

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OS Version

Summary

0000447: JEvent:event_number should be 64 bit

Description

Currently, the type of the event_number member of JEvent is "int" which is a signed 32 bit value. This is insufficient for runs with over 2billion events. This can happen if we realize a 200kHz trigger rate for a run lasting 3 hours. Note that even though 200kHz won't be written to the file, we may preserve the original event number going into the L3 trigger so the event numbers can exceed the 2billion limit. Also, the EVIO format stores the event number as a 64bit value in the Trigger bank so we need a 64 bit value to maintain compatibility.

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Notes
(0000643) davidl (administrator) 2015-06-09 16:52	This was implemented in revision 2338 and will appear in JANA 0.7.3. The change leaves the "int" versions of JEventProcessor::brun and JEventProcessor::evnt that are actually called by the new versions that use uint32_t and uint64_t respectively. This should allow sim-recon to work with JANA 0.7.3 without having to update every JEventProcessor and JFactory in the code right away.

Issue History
Date Modified	Username	Field	Change
2015-01-26 08:12	davidl	New Issue
2015-06-09 16:52	davidl	Note Added: 0000643
2015-06-09 16:52	davidl	Status	new => resolved
2015-06-09 16:52	davidl	Resolution	open => fixed
2015-06-09 16:52	davidl	Assigned To	=> davidl