Artifact of SSBSE '25 Challenge: GreenMalloc: Allocator Optimisation for Industrial Workloads

1. Abstract

This is the artifact of the paper GreenMalloc: Allocator Optimisation for Industrial Workloads. It contains the code of GreenMalloc and the results of the evaluation on gem5 with glibc malloc and tcmalloc.

2. Optimised Values

glibc:

- mmap_max
- mmap_threshold
- perturb
- top_pad
- trim_threshold
- arena_test
- arena_max

tcmalloc:

- TCMALLOC_SAMPLE_PARAMETER 
- TCMALLOC_RELEASE_RATE
- TCMALLOC_MAX_TOTAL_THREAD_CACHE_BYTES
- TCMALLOC_AGGRESSIVE_DECOMMIT
- TCMALLOC_OVERRIDE_PAGESIZE
- TCMALLOC_HEAP_LIMIT_MB
- TCMALLOC_SKIP_MMAP
- TCMALLOC_SKIP_SBRK
- TCMALLOC_MEMFS_LIMIT_MB
- TCMALLOC_MEMFS_ABORT_ON_FAIL
- TCMALLOC_MEMFS_IGNORE_MMAP_FAIL
- TCMALLOC_MEMFS_MAP_PRIVATE
- TCMALLOC_MEMFS_DISABLE_FALLBACK

Specifically, we tune:

TUNABLE_SPECS: ClassVar[Dict[str, Dict[str, Any]]] = {
    "mmap_max": {"type": "int", "low": 0, "high": 16 * 1024 * 1024},
    "mmap_threshold": {"type": "int", "low": 0, "high": 1 << 20},
    "perturb": {"type": "int", "low": 0, "high": 255},
    "top_pad": {"type": "int", "low": 0, "high": 1 << 20},
    "trim_threshold": {"type": "int", "low": 0, "high": 1 << 20},
    "arena_test": {"type": "int", "low": 0, "high": 1 << 20},
    "arena_max": {"type": "int", "low": 0, "high": 128},
}

 TUNABLE_SPECS: ClassVar[Dict[str, Dict[str, Any]]] = {
        "TCMALLOC_SAMPLE_PARAMETER": {"type": "int", "low": 0, "high": 1 << 20},
        "TCMALLOC_RELEASE_RATE": {"type": "int", "low": 0, "high": 1 << 20},
        "TCMALLOC_MAX_TOTAL_THREAD_CACHE_BYTES": {"type": "int", "low": 0, "high": 1 << 30},
        "TCMALLOC_AGGRESSIVE_DECOMMIT": {"type": "bool", "low": 0, "high": 1},
        "TCMALLOC_OVERRIDE_PAGESIZE": {"type": "int", "low": 4096, "high": 1 << 20},
        "TCMALLOC_HEAP_LIMIT_MB": {"type": "int", "low": 0, "high": 1 << 20},
        "TCMALLOC_SKIP_MMAP": {"type": "bool", "low": 0, "high": 1},
        "TCMALLOC_SKIP_SBRK": {"type": "bool", "low": 0, "high": 1},
        "TCMALLOC_MEMFS_LIMIT_MB": {"type": "int", "low": 0, "high": 1 << 20},
        "TCMALLOC_MEMFS_ABORT_ON_FAIL": {"type": "bool", "low": 0, "high": 1},
        "TCMALLOC_MEMFS_IGNORE_MMAP_FAIL": {"type": "bool", "low": 0, "high": 1},
        "TCMALLOC_MEMFS_MAP_PRIVATE": {"type": "bool", "low": 0, "high": 1},
        "TCMALLOC_MEMFS_DISABLE_FALLBACK": {"type": "bool", "low": 0, "high": 1},
    }