This commit introduces a comprehensive tracing mechanism for allocation failures within the Adaptive Cache Engine (ACE) component. This feature allows for precise identification of the root cause for Out-Of-Memory (OOM) issues related to ACE allocations.
Key changes include:
- **ACE Tracing Implementation**:
- Added environment variable to enable/disable detailed logging of allocation failures.
- Instrumented , , and to distinguish between "Threshold" (size class mismatch), "Exhaustion" (pool depletion), and "MapFail" (OS memory allocation failure).
- **Build System Fixes**:
- Corrected to ensure is properly linked into , resolving an error.
- **LD_PRELOAD Wrapper Adjustments**:
- Investigated and understood the wrapper's behavior under , particularly its interaction with and checks.
- Enabled debugging flags for environment to prevent unintended fallbacks to 's for non-tiny allocations, allowing comprehensive testing of the allocator.
- **Debugging & Verification**:
- Introduced temporary verbose logging to pinpoint execution flow issues within interception and routing. These temporary logs have been removed.
- Created to facilitate testing of the tracing features.
This feature will significantly aid in diagnosing and resolving allocation-related OOM issues in by providing clear insights into the failure pathways.
