fix: timer task is time out or enqueue queue_, should run task immediately #2761
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WalkthroughThe Changes
Sequence Diagram(s)sequenceDiagram
participant Thread as Thread
participant ThreadPool as ThreadPool
participant RSignal as RSignal
Thread->>ThreadPool: start runInThread()
ThreadPool->>RSignal: rsignal_wait check
alt rsignal_wait is true
ThreadPool->>RSignal: wait()
RSignal-->>ThreadPool: signal received
else rsignal_wait is false
ThreadPool->>ThreadPool: continue without wait
end
ThreadPool->>Thread: execute task
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wang007987
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Actionable comments posted: 0
Review details
Configuration used: CodeRabbit UI
Review profile: CHILL
Files selected for processing (1)
- src/net/src/thread_pool.cc (2 hunks)
Additional comments not posted (1)
src/net/src/thread_pool.cc (1)
134-134: Review ofrunInThreadmodifications for immediate task execution.The introduction of the
rsignal_waitvariable and its conditional logic are well-integrated into the existing structure of the method. The changes allow the thread to bypass waiting and proceed with task execution if conditions are met, aligning with the PR objectives.However, the logic to reset
rsignal_waittotrue(line 140) after it has been set tofalse(line 161) might lead to unintended behavior. The condition to reset should be more clearly defined to avoid potential race conditions or logic errors.- rsignal_wait = true; + // Consider reviewing the condition under which rsignal_wait is reset to true to ensure it aligns with expected thread behavior.Additionally, ensure that all external calls to
runInThreadare updated to pass the newrsignal_waitparameter. This is crucial as the method signature has changed.Also applies to: 137-141, 159-162
Verification successful
No external calls to
runInThreadneed updating.The search results confirm that the
runInThreadmethod is only used internally within thethread_poolimplementation. There are no external calls that need to be updated with the newrsignal_waitparameter.
src/net/include/thread_pool.h: Declaration ofrunInThread.src/net/src/thread_pool.cc: Internal call torunInThread.src/net/src/thread_pool.cc: Definition ofrunInThread.Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash # Description: Verify all external calls to `runInThread` are updated. # Test: Search for the function usage. Expect: Only occurances with the new signature. rg --type cpp $'runInThread'Length of output: 187
AlexStocks
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Actionable comments posted: 1
Review details
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Review profile: CHILL
Files selected for processing (1)
- src/net/src/thread_pool.cc (2 hunks)
Additional comments not posted (3)
src/net/src/thread_pool.cc (3)
159-162: Clarification needed on the logic to setrsignal_waitto false.The comment indicates that the task should run immediately when the timer task is timed out or the queue is enqueued, but it's unclear how this aligns with the overall thread logic, especially since
rsignal_waitis reset to true immediately after in the loop. This could lead to confusion or inefficiencies.Consider adding more detailed comments or restructuring the logic to make the intent and flow clearer.
134-134: Initialization ofrsignal_waitshould be explicitly set when declared.It's good practice to initialize variables explicitly to avoid any ambiguity about their initial state, especially in a multi-threaded context.
- bool rsignal_wait; + bool rsignal_wait = true;Likely invalid or redundant comment.
138-139: Ensure robust condition checking forrsignal_.wait.The lambda condition
!queue_.empty() || !time_queue_.empty() || should_stop()is crucial for the correct operation of the wait mechanism. However, there's a concern that this condition might not hold true between the release and re-acquisition of the lock, leading to potential race conditions.Verification successful
Let's gather more information about the context around the
rsignal_.waitcall to ensure that the condition is robust and protected against race conditions.
Let's refine our search to locate the
rsignal_identifier and its surrounding context to verify the robustness of the condition.
Robust Condition Checking for
rsignal_.waitVerifiedThe condition in
rsignal_.waitis protected by astd::unique_lockonmu_, which ensures that race conditions are avoided. The condition checks for!queue_.empty() || !time_queue_.empty() || should_stop()are comprehensive and robust.
- Location:
runInThreadmethod insrc/net/src/thread_pool.cc- Lock:
std::unique_lockonmu_ensures thread-safe condition checking.Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash # Description: Verify the robustness of the condition in `rsignal_.wait`. # Test: Manually trigger conditions to see if the wait exits prematurely. # Expect: The thread should only proceed when the condition is truly met. echo "Manual testing required to ensure robustness of the condition in rsignal_.wait."Length of output: 168
Script:
#!/bin/bash # Locate the function that contains the `rsignal_.wait` call and extract its surrounding context. ast-grep --lang cpp --pattern $'$_.wait($_, [this]() { return $_ || $_ || $_; });' --jsonLength of output: 93
Script:
#!/bin/bash # Locate the `rsignal_` identifier and extract its surrounding context. rg --context 10 'rsignal_' src/net/src/thread_pool.ccLength of output: 2814
| if (rsignal_wait) { | ||
| rsignal_.wait(lock, [this]() { return !queue_.empty() || !time_queue_.empty() || should_stop(); }); | ||
| } else { | ||
| rsignal_wait = true; | ||
| } |
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Potential race condition due to the handling of rsignal_wait.
The logic to set rsignal_wait to true only after the condition check could lead to a scenario where rsignal_wait is not reset in time, causing the thread to skip necessary waits. This could introduce race conditions or unexpected behaviors, especially under high load.
Consider restructuring the logic to ensure rsignal_wait is appropriately managed to avoid such issues.
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@wang007987 thank you for your PR. U have done a great job. Have u joined our Wechat group? |
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加上这个逻辑之后，线程还是优先执行到期的timertask吧？ |
After adding this logic, the thread should still give priority to executing the expired timertask, right? |
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sry, I think your pr maybe unuseful. I guess that u maybe wanna do 不好意思，我认为你的 pr 作用不大，我认为你也许是想在等待完 |
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