// result, we should exit the first request immediately; clients will retry.
		firstRequest.Store(false)
		return status.Error(codes.Unavailable, "server warmup not complete; try again")
	}
	// Check if server is ready to accept clients and process new requests.
	// Currently ready means caches have been synced and hence can build

		{name: "passthrough", lbType: networking.LoadBalancerSettings_PASSTHROUGH, enableSlowStartMode: true},
		{name: "roundrobin-without-warmup", lbType: networking.LoadBalancerSettings_ROUND_ROBIN, enableSlowStartMode: false},
		{name: "leastrequest-without-warmup", lbType: networking.LoadBalancerSettings_LEAST_REQUEST, enableSlowStartMode: false},
		{name: "empty lb type", enableSlowStartMode: true},
	}

	// As a result, the condition in the below for loop will never be
	// satisfied (w.resourceVersion is never negative), this call will
	// never hit the w.cond.Wait().
	// As a result - we can optimize the code by not firing the wakeup
	// function (and avoid starting a gorotuine), especially given that
	// resourceVersion=0 is the most common case.
	if resourceVersion > 0 {
		go func() {
			// Wake us up when the time limit has expired.  The docs

    waiter1.interrupt();

    waiter1.join();
    waiter2.awaitWaiting(); // should still be blocked

    LockSupport.unpark(waiter2); // spurious wakeup
    waiter2.awaitWaiting(); // should eventually re-park

    future.set(null);
    waiter2.join();
  }

  public void testRemoveWaiter_polling() throws Exception {

*   Added warmup capabilities to `tf.keras.optimizers.schedules.CosineDecay` learning rate scheduler. You can now specify an initial and target learning rate, and our scheduler will perform a linear interpolation between the two after which it will begin a decay phase....

    waiter1.interrupt();

    waiter1.join();
    waiter2.awaitWaiting(); // should still be blocked

    LockSupport.unpark(waiter2); // spurious wakeup
    waiter2.awaitWaiting(); // should eventually re-park

    future.set(null);
    waiter2.join();
  }

  public void testRemoveWaiter_polling() throws Exception {

  );
}

def TF_TPUOrdinalSelectorOp : TF_Op<"TPUOrdinalSelector", []> {
  let summary = "A TPU core selector Op.";

  let description = [{
This Op produces a set of TPU cores (for warm-up) or a single TPU core
(for regular inference) to execute the TPU program on. The output is
consumed by TPUPartitionedCall.
  }];

  let arguments = (ins);

  let results = (outs