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.

The GitHub of the project is available online as open source: https://github.com/dakaidan/SSBSE25-GreenBenchmark.

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},
    }