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From Neil Conway <>
Subject Review Request 50187: Removed the `os::sleep` from `Clock::settle`.
Date Tue, 19 Jul 2016 10:08:11 GMT

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Review request for mesos and Benjamin Mahler.

Bugs: MESOS-3760

Repository: mesos


`Clock::settle` is used to wait until all pending libprocess events
have been handled. Test cases should typically use it only when there is
no other way to achieve the proper synchronization between two events.

Previously, `Clock::settle` also contained an `os::sleep` call to
workaround broken test cases that assumed `settle` provided stronger
guarantees than described above (e.g., some test cases assumed that
doing `http::get` followed by a `Clock::settle` ensured that the remote
side of the HTTP connection will have seen the request). Currently,
there are relatively few such test cases, so it is better to fix those
test cases (or add a `sleep` call to them) and remove the `sleep` from


  3rdparty/libprocess/src/process.cpp 9661386afd4fddd1877d55941fa403afc9230280 
  3rdparty/libprocess/src/tests/metrics_tests.cpp 5a82f4f49aecd03d12687de629516be5b7895036



`make check` with lots of iterations.


Neil Conway

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