MemPerf: Profiling Allocator-Induced Performance Slowdowns

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" summary

MemPerf is a profiler that pinpoints allocator-induced slowdowns by modeling heap-object life cycles and distinguishing slow management operations from slow memory accesses. It builds an oracle from repeated runs to replace observed allocator-cycle costs, uses thread- and type-aware performance modeling plus PMU sampling and shadow memory to attribute cache and TLB misses to heap objects, and classifies miss types. The implemented tool reports 98% detection of >5% slowdowns with no false positives, imposes about 7.5% overhead, and finds real allocator design issues.

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" chapters (13)

1. 0:00MemPerf introduction
2. 2:36Allocator slowdown causes
3. 4:03BS simulation modeling
4. 5:28TLB and cache misses
5. 8:20glibc vs tcmalloc case
6. 9:49Evaluation against existing profilers
7. 10:52MemPerf overhead summary
8. 11:56Developer use cases
9. 12:16Q&A: Scalability
10. 13:39Q&A: Distinguishing allocator-induced misses
11. 14:41Q&A: Allocator design
12. 15:48Q&A: Application fixes
13. 16:54Q&A: Architecture specifics