WIP: custom allocator/memory pool in HLT1

This introduces a custom allocator and fast event-local memory pool and uses it to remove [almost] all dynamic [de]allocation in HLT1 algorithms. See LHCb MR for more details.

Goes with LHCb!2313 (closed) and Phys!631 (closed).

WIP reason: probably needs to be broken into more pieces, depending on consensus.

cc: @graven @nnolte @sstahl @ahennequ

mentioned in merge request Phys!631 (closed)

changed the description

mentioned in merge request LHCb!2270 (merged)

Just out of curiosity, how do the changes here compare performance wise to just using tcmalloc ?

added 8 commits

• c7cd1e1f...ccea54c9 - 6 commits from branch master
• 96194340 - Reserve output container in CombineTracks.
• aec44e36 - Modify HLT1 algorithms to support custom allocators.

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added 31 commits

• aec44e36...0019e9e7 - 29 commits from branch master
• dcc82f75 - Reserve output container in CombineTracks.
• 011faddc - Modify HLT1 algorithms to support custom allocators.

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changed the description

added 1 deleted label

• [2020-01-15 13:41] Validation started with lhcb-test-throughput2#260
• [2020-01-16 16:30] Validation started with lhcb-test-throughput2#262
• [2020-01-16 16:37] Validation started with lhcb-test-throughput2#262
• [2020-01-16 16:53] Validation started with lhcb-test-throughput2#262
• [2020-01-16 17:08] Validation started with lhcb-test-throughput2#262
• [2020-01-16 17:29] Validation started with lhcb-test-throughput2#262
• [2020-01-16 17:41] Validation started with lhcb-test-throughput2#262
• [2020-01-16 17:55] Validation started with lhcb-test-throughput2#262
• [2020-01-16 18:03] Validation started with lhcb-test-throughput2#262
• [2020-01-16 18:08] Validation started with lhcb-test-throughput2#262
• [2020-01-17 10:04] Validation started with lhcb-test-throughput2#262
• [2020-01-17 11:08] Validation started with lhcb-test-throughput2#262
• [2020-01-17 11:15] Validation started with lhcb-test-throughput2#262
• [2020-01-17 11:24] Validation started with lhcb-test-throughput2#262
• [2020-01-17 11:32] Validation started with lhcb-test-throughput2#262
• [2020-01-17 11:35] Validation started with lhcb-test-throughput2#262

• [2020-01-16 00:10] Validation started with lhcb-test-throughput2#262
• [2020-01-17 00:07] Validation started with lhcb-test-throughput2#263
• [2020-01-18 00:12] Validation started with lhcb-test-throughput2#264

removed 1 deleted label

mentioned in issue Moore#128 (closed)

added 77 commits

• 011faddc...840e814f - 75 commits from branch master
• 5764a302 - Reserve output container in CombineTracks.
• 9d59b297 - Modify HLT1 algorithms to support custom allocators.

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resolved all threads

Superseded by !1892 (merged), !1893 (merged), !1895 (merged) and !1896 (merged).

closed