Fix for flaky caffe2 dataio test (test_time_limit_reader_with_short_limit) (#27592)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/27592
The caffe2 data reader test `test_time_limit_reader_with_short_limit` is flaky as-written because it places an upper bound on how much can be read, but under stress it is possible for fewer records to be read. The fix is to make the assertion check a fuzzy/range check rather than exact equality, since there's not a straightforward way to precisely test a timer-based feature.
ghstack-source-id: 91543898
Test Plan:
`buck test mode/dev-tsan //caffe2/caffe2/python:dataio_test-2.7 -- --stress-runs 20` -> P117156924 (with fix, 100% pass)
P117158750 - without fix, lots of failures in this test
Reviewed By: boryiingsu
Differential Revision: D17816775
fbshipit-source-id: 2ab0d3304fbd9c9806d37a4fe2912c840616db61
