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Copy pathtest_memory.py
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85 lines (71 loc) · 2.72 KB
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# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements. See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership. The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied. See the License for the
# specific language governing permissions and limitations
# under the License.
import contextlib
import pyarrow as pa
@contextlib.contextmanager
def allocate_bytes(pool, nbytes):
"""
Temporarily allocate *nbytes* from the given *pool*.
"""
arr = pa.array([b"x" * nbytes], type=pa.binary(), memory_pool=pool)
# Fetch the values buffer from the varbinary array and release the rest,
# to get the desired allocation amount
buf = arr.buffers()[2]
arr = None
assert len(buf) == nbytes
try:
yield
finally:
buf = None
def check_allocated_bytes(pool):
"""
Check allocation stats on *pool*.
"""
allocated_before = pool.bytes_allocated()
max_mem_before = pool.max_memory()
with allocate_bytes(pool, 512):
assert pool.bytes_allocated() == allocated_before + 512
new_max_memory = pool.max_memory()
assert pool.max_memory() >= max_mem_before
assert pool.bytes_allocated() == allocated_before
assert pool.max_memory() == new_max_memory
def test_default_allocated_bytes():
pool = pa.default_memory_pool()
with allocate_bytes(pool, 1024):
check_allocated_bytes(pool)
assert pool.bytes_allocated() == pa.total_allocated_bytes()
def test_proxy_memory_pool():
pool = pa.proxy_memory_pool(pa.default_memory_pool())
check_allocated_bytes(pool)
def test_logging_memory_pool(capfd):
pool = pa.logging_memory_pool(pa.default_memory_pool())
check_allocated_bytes(pool)
out, err = capfd.readouterr()
assert err == ""
assert out.count("Allocate:") > 0
assert out.count("Allocate:") == out.count("Free:")
def test_set_memory_pool():
old_pool = pa.default_memory_pool()
pool = pa.proxy_memory_pool(old_pool)
pa.set_memory_pool(pool)
try:
allocated_before = pool.bytes_allocated()
with allocate_bytes(None, 512):
assert pool.bytes_allocated() == allocated_before + 512
assert pool.bytes_allocated() == allocated_before
finally:
pa.set_memory_pool(old_pool)