AthenaMP+AthenaServices: Support executing algorithms/sequences in AthenaMP during PreFork

This is an adaptation of @fwinkl's !55759 (merged) to generic AthenaMP. In a nutshell, this gives the possibility of executing certain algorithms/sequences during PreFork incident in AthenaMP. One can use this to execute the conditions algorithms before the first event, hence sharing the memory across workers even without FAFE.

Based on an 8 process, 10k event AODtoDAOD test w/ SharedWriter, vanilla MP uses about 2 GB/worker, executing conditions algorithms before the event loop this way reduces this to 1.5 GB/core, while FAFE still performs the best at 0.9 GB/worker:

Default

ExecAtPreFork

FAFE

We can take a look to see if there is any milage in adopting such an approach in other jobs such as derivation production.

cc: @tsulaia @fwinkl @rbielski @jcatmore @gemmeren

assigned to @amete

This merge request affects 2 packages:

• Control/AthenaMP
• Control/AthenaServices

Affected files list will not be printed in this case

Adding @ssnyder as watcher

added Core master review-pending-level-1 labels

CI Result SUCCESS (hash aacfad31)

	Athena	AthSimulation	AthGeneration	AnalysisBase	AthAnalysis	DetCommon
externals
cmake
make
tests

Full details available on this CI monitor view. Check the JIRA CI status board for known problems
Athena: number of compilation errors 0, warnings 0
AthSimulation: number of compilation errors 0, warnings 0
AthGeneration: number of compilation errors 0, warnings 0
AnalysisBase: number of compilation errors 0, warnings 0
AthAnalysis: number of compilation errors 0, warnings 0
DetCommon: number of compilation errors 0, warnings 0
For experts only: Jenkins output [CI-MERGE-REQUEST-CC7 57282]

added alsoTargeting:22.0 label

Looks good. Approved

Sergei L1

added review-approved label and removed review-pending-level-1 label

mentioned in commit 932bed12

merged

added sweep:done label

picked the changes into the branch cherry-pick-932bed12b5b-22.0 with commit 991416e8

mentioned in commit 991416e8

mentioned in merge request !55854 (merged)

Sweep summary
successful:

• 22.0

(see https://aiatlas154.cern.ch/jenkins/job/auto_git_sweeps/2979/console for details)

mentioned in commit e9b8eaf2

mentioned in merge request !56517 (merged)

resolved all threads