[YUNIKORN-1881] Improve the performance of tryPlaceholderAllocate - ASF JIRA

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Details

Type: Sub-task
Status: Closed
Priority: Major
Resolution: Fixed
Affects Version/s: None
Fix Version/s: 1.4.0
Component/s: None
Labels:
- pull-request-available

Description

During the scheduling cycle, tryPlaceholderAllocate() is too expensive. It copies and sorts apps and tries to find schedulable tasks even if we do not have placeholders at all. For example, tryReservedAllocate() only accounts for 0.5% of the total cpu time, while tryPlaceholderAllocate() uses around 5%.