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https://github.com/ceph/ceph
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4f1817aa8f
The 'op_r' will just acount CEPH_OSD_FLAG_READ flag, which will include some other none real data read opcodes, like the CEPH_OSD_OP_STAT. Signed-off-by: Xiubo Li <xiubli@redhat.com>
31 lines
1.2 KiB
Python
31 lines
1.2 KiB
Python
import logging
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from tasks.cephfs.fuse_mount import FuseMount
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from tasks.cephfs.cephfs_test_case import CephFSTestCase
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log = logging.getLogger(__name__)
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class TestReadahead(CephFSTestCase):
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def test_flush(self):
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if not isinstance(self.mount_a, FuseMount):
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self.skipTest("FUSE needed for measuring op counts")
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# Create 32MB file
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self.mount_a.run_shell(["dd", "if=/dev/urandom", "of=foo", "bs=1M", "count=32"])
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# Unmount and remount the client to flush cache
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self.mount_a.umount_wait()
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self.mount_a.mount_wait()
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initial_op_read = self.mount_a.admin_socket(['perf', 'dump', 'objecter'])['objecter']['osdop_read']
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self.mount_a.run_shell(["dd", "if=foo", "of=/dev/null", "bs=128k", "count=32"])
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op_read = self.mount_a.admin_socket(['perf', 'dump', 'objecter'])['objecter']['osdop_read']
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assert op_read >= initial_op_read
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op_read -= initial_op_read
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log.info("read operations: {0}".format(op_read))
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# with exponentially increasing readahead, we should see fewer than 10 operations
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# but this test simply checks if the client is doing a remote read for each local read
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if op_read >= 32:
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raise RuntimeError("readahead not working")
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