Revert "address comments" #10
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This reverts commit 61d05ff.
WalkthroughThe recent changes involve minor code refinements and significant enhancements in the Changes
Sequence Diagram(s)sequenceDiagram
participant Main
participant FileCache
participant S3
Main->>FileCache: getOrWait()
FileCache->>FileCache: Increment fg_download_from_s3
FileCache->>S3: fgDownload(cache_lock, s3_key)
S3->>FileCache: Download file
FileCache-->>Main: Return file segment
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Files selected for processing (4)
- dbms/src/Server/Server.cpp (1 hunks)
- dbms/src/Storages/DeltaMerge/File/dtpb/dmfile.proto (1 hunks)
- dbms/src/Storages/S3/FileCache.cpp (3 hunks)
- dbms/src/Storages/S3/FileCache.h (1 hunks)
Files skipped from review due to trivial changes (1)
- dbms/src/Server/Server.cpp
Additional comments not posted (5)
dbms/src/Storages/DeltaMerge/File/dtpb/dmfile.proto (1)
66-66: Verify the impact of tag number change.Changing the tag number from
102to101forvector_indexin theColumnStatmessage affects serialization. Ensure that this change is compatible with existing serialized data and does not conflict with other fields.dbms/src/Storages/S3/FileCache.h (1)
256-256: Ensure correct usage of the mutex lock.The addition of
std::unique_lock<std::mutex> & cache_lockto thefgDownloadmethod signature is intended to enhance thread safety. Verify that the lock is appropriately acquired and released in all contexts wherefgDownloadis called to prevent deadlocks.dbms/src/Storages/S3/FileCache.cpp (3)
291-292: Verify the increment offg_download_from_s3.Ensure that the increment of
PerfContext::file_cache.fg_download_from_s3is correctly implemented and that this metric accurately reflects the number of foreground downloads initiated.Verification successful
Increment of
fg_download_from_s3is correctly implemented and verified.The increment of
PerfContext::file_cache.fg_download_from_s3inFileCache.cppaccurately reflects the initiation of foreground downloads. This is confirmed by associated tests that verify its value, ensuring it tracks the expected number of downloads. The usage in other parts of the codebase supports its role in monitoring download activities.
- File:
dbms/src/Storages/S3/FileCache.cpp- Tests:
dbms/src/Storages/DeltaMerge/tests/gtest_dm_vector_index.cppScripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash # Description: Verify the usage of `fg_download_from_s3` to ensure it is incremented correctly. # Test: Search for the usage of `fg_download_from_s3` to ensure it is incremented only when appropriate. rg --type cpp 'fg_download_from_s3'Length of output: 621
Script:
#!/bin/bash # Gather context around the increment in FileCache.cpp rg -A 5 -B 5 'PerfContext::file_cache.fg_download_from_s3\+\+' dbms/src/Storages/S3/FileCache.cpp # Gather context around the usage in DMFileWithVectorIndexBlockInputStream.cpp rg -A 5 -B 5 'fg_download_from_s3' dbms/src/Storages/DeltaMerge/File/DMFileWithVectorIndexBlockInputStream.cpp # Gather context around the test assertions in gtest_dm_vector_index.cpp rg -A 5 -B 5 'fg_download_from_s3' dbms/src/Storages/DeltaMerge/tests/gtest_dm_vector_index.cppLength of output: 2070
Line range hint
679-706:
Ensure proper handling of the mutex lock infgDownload.The
fgDownloadmethod now includes astd::unique_lock<std::mutex> & cache_lockparameter. Verify that the lock is held throughout the method execution and released appropriately to prevent deadlocks.Verification successful
The mutex lock in
fgDownloadis managed correctly. Theremovefunction does not manipulate the lock directly, ensuring it is held throughout the method execution, preventing deadlocks.Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash # Description: Verify that the lock is properly managed within the `fgDownload` method. # Test: Check the `fgDownload` method implementation to ensure the lock is held during execution. ast-grep --lang cpp --pattern $'void FileCache::fgDownload(std::unique_lock<std::mutex> & cache_lock, $_, $_) { $$$ }'Length of output: 121
Script:
#!/bin/bash # Description: Check for any unlocking or re-locking of the mutex within the `fgDownload` method. # Search for unlock or lock operations within the `fgDownload` method. rg -A 20 'void FileCache::fgDownload\(' --no-heading --color=never | grep -E 'unlock|lock'Length of output: 318
Script:
#!/bin/bash # Description: Check the `remove` function to verify how it handles the `cache_lock`. # Search for the `remove` function definition and its handling of the lock. ast-grep --lang cpp --pattern $'void remove(std::unique_lock<std::mutex> & cache_lock, $_) { $$$ }'Length of output: 102
Script:
#!/bin/bash # Description: Locate the `remove` function definition and examine its implementation. # Search for the `remove` function definition in the codebase. rg 'void remove\(' -A 10 --no-heading --color=neverLength of output: 8587
699-699: Ensure correct removal with lock infgDownload.The call to
remove(cache_lock, s3_key)should be verified to ensure that the lock is correctly used to prevent race conditions.Verification successful
Correct use of locks in
fgDownloadandremoveconfirmed.The
fgDownloadfunction uses astd::unique_lock<std::mutex>to manage synchronization, and theremovefunction also uses a lock internally. This ensures that race conditions are effectively prevented when removing items from the cache. The implementation appears to be correct and thread-safe.Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash # Description: Verify the usage of `remove` with the lock in `fgDownload`. # Test: Search for calls to `remove` with a lock parameter to ensure proper usage. rg --type cpp 'remove\(' -A 2Length of output: 43401
Script:
#!/bin/bash # Description: Find the implementation of `fgDownload` and check for the use of `remove` with a lock. # Locate the implementation of `fgDownload`. ast-grep --lang cpp --pattern 'void fgDownload($_) { $$$ }' -A 10 # Check for the definition of `remove` that accepts a lock parameter. ast-grep --lang cpp --pattern 'void remove($_, $_) { $$$ }'Length of output: 129
Script:
#!/bin/bash # Description: Search for `fgDownload` and `remove` in `FileCache.cpp` to gather more context. # Search for `fgDownload` in `FileCache.cpp`. rg 'fgDownload' -A 5 dbms/src/Storages/S3/FileCache.cpp # Search for `remove` in `FileCache.cpp` to find its usage and any associated locking mechanisms. rg 'remove' -A 5 dbms/src/Storages/S3/FileCache.cppLength of output: 4360
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This reverts commit 61d05ff.
What problem does this PR solve?
Issue Number: close #xxx
Problem Summary:
What is changed and how it works?
Check List
Tests
Side effects
Documentation
Release note
Summary by CodeRabbit
Bug Fixes
New Features
Refactor