mirror of
https://github.com/ceph/ceph
synced 2024-12-18 09:25:49 +00:00
32 lines
1.2 KiB
Python
32 lines
1.2 KiB
Python
import logging
|
|
from tasks.cephfs.fuse_mount import FuseMount
|
|
from tasks.cephfs.cephfs_test_case import CephFSTestCase
|
|
|
|
log = logging.getLogger(__name__)
|
|
|
|
|
|
class TestReadahead(CephFSTestCase):
|
|
def test_flush(self):
|
|
if not isinstance(self.mount_a, FuseMount):
|
|
self.skipTest("FUSE needed for measuring op counts")
|
|
|
|
# Create 32MB file
|
|
self.mount_a.run_shell(["dd", "if=/dev/urandom", "of=foo", "bs=1M", "count=32"])
|
|
|
|
# Unmount and remount the client to flush cache
|
|
self.mount_a.umount_wait()
|
|
self.mount_a.mount()
|
|
self.mount_a.wait_until_mounted()
|
|
|
|
initial_op_r = self.mount_a.admin_socket(['perf', 'dump', 'objecter'])['objecter']['op_r']
|
|
self.mount_a.run_shell(["dd", "if=foo", "of=/dev/null", "bs=128k", "count=32"])
|
|
op_r = self.mount_a.admin_socket(['perf', 'dump', 'objecter'])['objecter']['op_r']
|
|
assert op_r >= initial_op_r
|
|
op_r -= initial_op_r
|
|
log.info("read operations: {0}".format(op_r))
|
|
|
|
# with exponentially increasing readahead, we should see fewer than 10 operations
|
|
# but this test simply checks if the client is doing a remote read for each local read
|
|
if op_r >= 32:
|
|
raise RuntimeError("readahead not working")
|