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#!/usr/bin/env python
#
# test_indexed_gzip_threading.py -
#
# Author: Paul McCarthy <pauldmccarthy@gmail.com>
#
from __future__ import print_function
from __future__ import division
import sys
import threading
import numpy as np
import pytest
import indexed_gzip as igzip
from . import check_data_valid
pytestmark = pytest.mark.indexed_gzip_test
def test_IndexedGzipFile_open_close(testfile, nelems, concat):
_test_IndexedGzipFile_open_close(testfile, False)
def test_IndexedGzipFile_open_close_drop_handles(testfile, nelems, concat):
_test_IndexedGzipFile_open_close(testfile, True)
@pytest.mark.slow_test
def test_IndexedGzipFile_pread_threaded(testfile, nelems, concat):
_test_IndexedGzipFile_pread_threaded(testfile, nelems, False)
@pytest.mark.slow_test
def test_IndexedGzipFile_pread_threaded_drop_handles(testfile, nelems, concat):
_test_IndexedGzipFile_pread_threaded(testfile, nelems, True)
def _test_IndexedGzipFile_open_close(testfile, drop):
f = igzip.IndexedGzipFile(filename=testfile, drop_handles=drop)
f.seek(10)
f.read(10)
f.close()
def _test_IndexedGzipFile_pread_threaded(testfile, nelems, drop):
filesize = nelems * 8
indexSpacing = max(524288, filesize // 2000)
with igzip.IndexedGzipFile(filename=testfile,
spacing=indexSpacing,
drop_handles=drop) as f:
readelems = 50
readsize = readelems * 8
nthreads = 100
allreads = []
def do_pread(nbytes, offset):
data = f.pread(nbytes, int(offset * 8))
allreads.append((offset, data))
offsets = np.linspace(0, nelems - readelems, nthreads,
dtype=np.uint64)
threads = [threading.Thread(target=do_pread, args=(readsize, o))
for o in offsets]
[t.start() for t in threads]
[t.join() for t in threads]
assert len(allreads) == nthreads
for offset, data in allreads:
assert len(data) == readsize
data = np.ndarray(shape=readelems, dtype=np.uint64,
buffer=data)
assert check_data_valid(data, offset, offset + readelems)
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