Tidying Up the Address Space
Fuente:
arXiv
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| Format: | Preprint |
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2025
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| _version_ | 1866914108235841536 |
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| author | Banakar, Vinay Yang, Suli Wu, Kan Arpaci-Dusseau, Andrea C. Arpaci-Dusseau, Remzi H. Keeton, Kimberly |
| author_facet | Banakar, Vinay Yang, Suli Wu, Kan Arpaci-Dusseau, Andrea C. Arpaci-Dusseau, Remzi H. Keeton, Kimberly |
| contents | Memory tiering in datacenters does not achieve its full potential due to hotness fragmentation -- the intermingling of hot and cold objects within memory pages. This fragmentation prevents page-based reclamation systems from distinguishing truly hot pages from pages containing mostly cold objects, fundamentally limiting memory efficiency despite highly skewed accesses. We introduce address-space engineering: dynamically reorganizing application virtual address spaces to create uniformly hot and cold regions that any page-level tiering backend can manage effectively. HADES demonstrates this frontend/backend approach through a compiler-runtime system that tracks and migrates objects based on access patterns, requiring minimal developer intervention. Evaluations across ten data structures achieve up to 70% memory reduction with 3% performance overhead, showing that address space engineering enables existing reclamation systems to reclaim memory aggressively without performance degradation. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_19765 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Tidying Up the Address Space Banakar, Vinay Yang, Suli Wu, Kan Arpaci-Dusseau, Andrea C. Arpaci-Dusseau, Remzi H. Keeton, Kimberly Operating Systems Performance Programming Languages Memory tiering in datacenters does not achieve its full potential due to hotness fragmentation -- the intermingling of hot and cold objects within memory pages. This fragmentation prevents page-based reclamation systems from distinguishing truly hot pages from pages containing mostly cold objects, fundamentally limiting memory efficiency despite highly skewed accesses. We introduce address-space engineering: dynamically reorganizing application virtual address spaces to create uniformly hot and cold regions that any page-level tiering backend can manage effectively. HADES demonstrates this frontend/backend approach through a compiler-runtime system that tracks and migrates objects based on access patterns, requiring minimal developer intervention. Evaluations across ten data structures achieve up to 70% memory reduction with 3% performance overhead, showing that address space engineering enables existing reclamation systems to reclaim memory aggressively without performance degradation. |
| title | Tidying Up the Address Space |
| topic | Operating Systems Performance Programming Languages |
| url | https://arxiv.org/abs/2510.19765 |