[Test] Make test_pipeline_call_is_async less problematic. (#1251)

* initial commit

* initial commit

* quality

* make flaky

* increase the error bands

* cleanup

* add flaky after all...

tests/deepsparse/pipelines/test_pipeline.py

@@ -18,6 +18,7 @@
 
 import numpy
 
+import flaky
 import pytest
 from deepsparse.base_pipeline import BasePipeline
 from deepsparse.pipeline import (
@@ -124,6 +125,7 @@ def test_pipeline_executor_num_workers():
     assert executor._max_workers >= 1
 
 
+@flaky.flaky(max_runs=2, min_passes=1)
 @mock_engine(rng_seed=0)
 def test_pipeline_call_is_async(engine_mock):
     # attempts to verify that pipeline calls to engine are async
@@ -158,4 +160,4 @@ def sleep_then_engine_forward(xs, context):
 
         # instead of doing a hard comparison of timing for each separate
         # duration, do relative comparison of timing
-        assert numpy.allclose(dur_1_worker / dur_2_worker, 2, atol=0.1)
+        assert numpy.allclose(dur_1_worker / dur_2_worker, 2, atol=0.15)