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Summary: The patch reduces the contention over prepared_mutex_ using these techniques: 1) Move ::RemovePrepared() to be called from the commit callback when we have two write queues. 2) Use two separate mutex for PreparedHeap, one prepared_mutex_ needed for ::RemovePrepared, and one ::push_pop_mutex() needed for ::AddPrepared(). Given that we call ::AddPrepared only from the first write queue and ::RemovePrepared mostly from the 2nd, this will result into each the two write queues not competing with each other over a single mutex. ::RemovePrepared might occasionally need to acquire ::push_pop_mutex() if ::erase() ends up with calling ::pop() 3) Acquire ::push_pop_mutex() on the first callback of the write queue and release it on the last. Pull Request resolved: https://github.com/facebook/rocksdb/pull/5420 Differential Revision: D15741985 Pulled By: maysamyabandeh fbshipit-source-id: 84ce8016007e88bb6e10da5760ba1f0d26347735 |
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| .. | ||
| db_impl.cc | ||
| db_impl.h | ||
| db_impl_compaction_flush.cc | ||
| db_impl_debug.cc | ||
| db_impl_experimental.cc | ||
| db_impl_files.cc | ||
| db_impl_open.cc | ||
| db_impl_readonly.cc | ||
| db_impl_readonly.h | ||
| db_impl_secondary.cc | ||
| db_impl_secondary.h | ||
| db_impl_write.cc | ||
| db_secondary_test.cc | ||