def test_stop(pyocf_ctx, mode: CacheMode, cls: CacheLineSize,
with_flush: bool):
"""Stopping cache.
Check if cache is stopped properly in different modes with or without preceding flush operation.
"""
cache_device = RamVolume(Size.from_MiB(50))
core_device = RamVolume(Size.from_MiB(5))
cache = Cache.start_on_device(cache_device,
cache_mode=mode,
cache_line_size=cls)
core = Core.using_device(core_device)
cache.add_core(core)
front_vol = CoreVolume(core, open=True)
queue = cache.get_default_queue()
cls_no = 10
run_io_and_cache_data_if_possible(core, mode, cls, cls_no)
stats = cache.get_stats()
assert int(stats["conf"]["dirty"]) == (cls_no if mode.lazy_write() else 0),\
"Dirty data before MD5"
md5_exported_core = front_vol.md5()
if with_flush:
cache.flush()
cache.stop()
if mode.lazy_write() and not with_flush:
assert core_device.md5() != md5_exported_core, \
"MD5 check: core device vs exported object with dirty data"
else:
assert core_device.md5() == md5_exported_core, \
"MD5 check: core device vs exported object with clean data"
def test_load_cache_with_cores(pyocf_ctx, open_cores):
cache_device = RamVolume(S.from_MiB(40))
core_device = RamVolume(S.from_MiB(40))
cache = Cache.start_on_device(cache_device)
core = Core.using_device(core_device, name="test_core")
cache.add_core(core)
vol = CoreVolume(core, open=True)
write_data = Data.from_string("This is test data")
io = vol.new_io(cache.get_default_queue(),
S.from_sector(3).B, write_data.size, IoDir.WRITE, 0, 0)
io.set_data(write_data)
cmpl = OcfCompletion([("err", c_int)])
io.callback = cmpl.callback
io.submit()
cmpl.wait()
cache.stop()
cache = Cache.load_from_device(cache_device, open_cores=open_cores)
if not open_cores:
cache.add_core(core, try_add=True)
else:
core = cache.get_core_by_name("test_core")
vol = CoreVolume(core, open=True)
read_data = Data(write_data.size)
io = vol.new_io(cache.get_default_queue(),
S.from_sector(3).B, read_data.size, IoDir.READ, 0, 0)
io.set_data(read_data)
cmpl = OcfCompletion([("err", c_int)])
io.callback = cmpl.callback
io.submit()
cmpl.wait()
assert read_data.md5() == write_data.md5()
assert vol.md5() == core_device.md5()
def test_simple_wt_write(pyocf_ctx):
cache_device = RamVolume(S.from_MiB(50))
core_device = RamVolume(S.from_MiB(50))
cache = Cache.start_on_device(cache_device)
core = Core.using_device(core_device)
queue = cache.get_default_queue()
cache.add_core(core)
vol = CoreVolume(core, open=True)
cache_device.reset_stats()
core_device.reset_stats()
r = Rio().target(vol).readwrite(ReadWrite.WRITE).size(
S.from_sector(1)).run([queue])
assert cache_device.get_stats()[IoDir.WRITE] == 1
cache.settle()
stats = cache.get_stats()
assert stats["req"]["wr_full_misses"]["value"] == 1
assert stats["usage"]["occupancy"]["value"] == 1
assert vol.md5() == core_device.md5()
cache.stop()
