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由 Andrew Kryczka 提交于
Summary: Previously `db_stress` attempted to configure direct I/O dynamically in `SetOptions()` which had multiple problems (ummm must've never been tested): - It's a DB option so SetDBOptions should've been called instead - It's not a dynamic option so even SetDBOptions would fail - It required enabling SyncPoint to mask O_DIRECT since it had no way to detect whether the DB directory was in tmpfs or not. This required locking that consumed ~80% of db_stress CPU. In this PR I delete the broken dynamic config and instead configure it statically, only enabling it if the DB directory truly supports O_DIRECT. Closes https://github.com/facebook/rocksdb/pull/3939 Differential Revision: D8238120 Pulled By: ajkr fbshipit-source-id: 60bb2deebe6c9b54a3f788079261715b4a229279
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