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akankshamahajan 5b5b011cdd Avoid double block cache lookup during Seek with async_io option (#11616) 
Summary:
With the async_io option, the Seek happens in 2 phases. Phase 1 starts an asynchronous read on a block cache miss, and phase 2 waits for it to complete and finishes the seek. In both phases, BlockBasedTable::NewDataBlockIterator is called, which tries to lookup the block cache for the data block first before looking in the prefetch buffer. It's optimized by doing the block cache lookup only in the first phase and save some CPU.

Pull Request resolved: https://github.com/facebook/rocksdb/pull/11616

Test Plan: Added unit test

Reviewed By: jaykorean

Differential Revision: D47477887

Pulled By: akankshamahajan15

fbshipit-source-id: 0355e0a68fc0ea2eb92340ae42735afcdbcbfd79
 		2023-09-18 11:32:30 -07:00
..
delete_scheduler.cc Add a ticker to track number of trash files deleted in background thread (#11540) 2023-06-16 10:05:25 -07:00
delete_scheduler.h Remove RocksDB LITE (#11147) 2023-01-27 13:14:19 -08:00
delete_scheduler_test.cc Add missing status check when compiling with `ASSERT_STATUS_CHECKED=1` (#11686) 2023-08-09 15:46:44 -07:00
file_prefetch_buffer.cc Avoid alignment in FilePrefetchBuffer during seek with async_io (#11793) 2023-09-11 11:41:44 -07:00
file_prefetch_buffer.h Update upper_bound_offset when reseek changes iterate_upper_bound dynamically (#11775) 2023-09-15 10:05:56 -07:00
file_util.cc Fix a bug of rocksdb.file.read.verify.file.checksums.micros not being populated (#11836) 2023-09-15 10:36:14 -07:00
file_util.h Fix a bug of rocksdb.file.read.verify.file.checksums.micros not being populated (#11836) 2023-09-15 10:36:14 -07:00
filename.cc Run Clang format on file folder (#10860) 2022-10-24 18:34:52 -07:00
filename.h Run Clang format on file folder (#10860) 2022-10-24 18:34:52 -07:00
line_file_reader.cc Support read rate-limiting in SequentialFileReader (#9973) 2022-05-24 10:28:57 -07:00
line_file_reader.h Support read rate-limiting in SequentialFileReader (#9973) 2022-05-24 10:28:57 -07:00
prefetch_test.cc Avoid double block cache lookup during Seek with async_io option (#11616) 2023-09-18 11:32:30 -07:00
random_access_file_reader.cc Add some unit tests when file read returns error during compaction/scanning (#11788) 2023-09-06 10:23:41 -07:00
random_access_file_reader.h Group rocksdb.sst.read.micros stat by different user read IOActivity + misc (#11444) 2023-08-08 17:26:50 -07:00
random_access_file_reader_test.cc Group rocksdb.sst.read.micros stat by different user read IOActivity + misc (#11444) 2023-08-08 17:26:50 -07:00
read_write_util.cc Run Clang format on file folder (#10860) 2022-10-24 18:34:52 -07:00
read_write_util.h Run Clang format on file folder (#10860) 2022-10-24 18:34:52 -07:00
readahead_file_info.h Reuse internal auto readhead_size at each Level (expect L0) for Iterations (#9056) 2021-11-10 16:20:04 -08:00
readahead_raf.cc Change internal headers with duplicate names (#11408) 2023-05-17 11:27:09 -07:00
readahead_raf.h Make StringEnv, StringSink, StringSource use FS classes (#7786) 2021-01-04 16:01:01 -08:00
sequence_file_reader.cc Change internal headers with duplicate names (#11408) 2023-05-17 11:27:09 -07:00
sequence_file_reader.h Group rocksdb.sst.read.micros stat by different user read IOActivity + misc (#11444) 2023-08-08 17:26:50 -07:00
sst_file_manager_impl.cc Remove RocksDB LITE (#11147) 2023-01-27 13:14:19 -08:00
sst_file_manager_impl.h Remove RocksDB LITE (#11147) 2023-01-27 13:14:19 -08:00
writable_file_writer.cc Change internal headers with duplicate names (#11408) 2023-05-17 11:27:09 -07:00
writable_file_writer.h Remove RocksDB LITE (#11147) 2023-01-27 13:14:19 -08:00