Andrew Kryczka ec024a86de More robust sync points for intra-L0 compaction tests (#7382)
Summary:
`IntraL0CompactionAfterFlushCheckConsistencyFail` was flaky by sometimes failing due to no intra-L0 compactions happening. I was able to repro it by putting a `sleep(1)` in the compaction thread before it grabs the lock and picks a compaction. This also showed other intra-L0 tests are affected too, although some of them exhibit hanging forever rather than failing.

The problem was that all the flushes/ingestions could finish before any compaction got picked, so it would end up simply picking all the files that the test generates for L0->L1. But, these tests intend only the first few files to be picked for L0->L1, and the subsequent files to be picked for intra-L0. This PR adjusts the sync points of all the intra-L0 tests to enforce this.

Pull Request resolved: https://github.com/facebook/rocksdb/pull/7382

Test Plan: run all the `db_compaction_test`s with and without the artificial `sleep()`

Reviewed By: jay-zhuang

Differential Revision: D23684985

Pulled By: ajkr

fbshipit-source-id: 6508399030dddec7738e9853a7b3dc53ef77a584
2020-09-15 22:44:16 -07:00
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