You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
89 lines
3.1 KiB
Python
89 lines
3.1 KiB
Python
import fcntl
|
|
import os
|
|
import shutil
|
|
from contextlib import contextmanager
|
|
from pathlib import Path
|
|
from typing import Optional
|
|
|
|
import huggingface_hub
|
|
from hivemind.utils.logging import get_logger
|
|
|
|
logger = get_logger(__name__)
|
|
|
|
DEFAULT_CACHE_DIR = os.getenv("PETALS_CACHE", Path(Path.home(), ".cache", "petals"))
|
|
|
|
BLOCKS_LOCK_FILE = "blocks.lock"
|
|
|
|
|
|
@contextmanager
|
|
def _blocks_lock(cache_dir: Optional[str], mode: int):
|
|
if cache_dir is None:
|
|
cache_dir = DEFAULT_CACHE_DIR
|
|
lock_path = Path(cache_dir, BLOCKS_LOCK_FILE)
|
|
|
|
os.makedirs(lock_path.parent, exist_ok=True)
|
|
with open(lock_path, "wb") as lock_fd:
|
|
fcntl.flock(lock_fd.fileno(), mode)
|
|
# The OS will release the lock when lock_fd is closed or the process is killed
|
|
yield
|
|
|
|
|
|
def allow_cache_reads(cache_dir: Optional[str]):
|
|
"""Allows simultaneous reads, guarantees that blocks won't be removed along the way (shared lock)"""
|
|
return _blocks_lock(cache_dir, fcntl.LOCK_SH)
|
|
|
|
|
|
def allow_cache_writes(
|
|
cache_dir: Optional[str], *, reserve: Optional[int] = None, max_disk_space: Optional[int] = None
|
|
):
|
|
"""Allows saving new blocks and removing the old ones (exclusive lock)"""
|
|
return _blocks_lock(cache_dir, fcntl.LOCK_EX)
|
|
|
|
|
|
def free_disk_space_for(
|
|
model_name: str,
|
|
size: int,
|
|
*,
|
|
cache_dir: Optional[str],
|
|
max_disk_space: Optional[int],
|
|
os_quota: int = 1024**3, # Minimal space we should leave to keep OS function normally
|
|
):
|
|
if cache_dir is None:
|
|
cache_dir = DEFAULT_CACHE_DIR
|
|
cache_info = huggingface_hub.scan_cache_dir(cache_dir)
|
|
model_repos = [repo for repo in cache_info.repos if repo.repo_type == "model" and repo.repo_id == model_name]
|
|
|
|
occupied_space = sum(repo.size_on_disk for repo in model_repos)
|
|
available_space = shutil.disk_usage(cache_dir).free - os_quota
|
|
if max_disk_space is not None:
|
|
available_space = min(available_space, max_disk_space - occupied_space)
|
|
|
|
gib = 1024**3
|
|
logger.debug(f"Disk space: required {size / gib:.1f} GiB, available {available_space / gib:.1f} GiB")
|
|
if size <= available_space:
|
|
return
|
|
|
|
revisions = [revision for repo in model_repos for revision in repo.revisions]
|
|
revisions.sort(key=lambda rev: max([item.blob_last_accessed for item in rev.files], default=rev.last_modified))
|
|
|
|
# Remove as few least recently used shards as possible
|
|
pending_removal = []
|
|
freed_space = 0
|
|
extra_space_needed = size - available_space
|
|
for rev in revisions:
|
|
pending_removal.append(rev.commit_hash)
|
|
freed_space += rev.size_on_disk
|
|
if freed_space >= extra_space_needed:
|
|
break
|
|
|
|
if pending_removal:
|
|
logger.info(f"Removing {len(pending_removal)} shards to free {freed_space / gib:.1f} GiB of disk space")
|
|
delete_strategy = cache_info.delete_revisions(*pending_removal)
|
|
delete_strategy.execute()
|
|
|
|
if freed_space < extra_space_needed:
|
|
raise RuntimeError(
|
|
f"Insufficient disk space to load a block. Please free {(extra_space_needed - freed_space) / gib:.1f} GiB "
|
|
f"on the volume for {cache_dir} or increase --max_disk_space if you set it manually"
|
|
)
|