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minor changes for rate limiter test flakiness

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Summary:
the 50%+ drained constraint wasn't working consistently in some of our test environments, maybe their resources are too low. relax the constraints a bit.
Closes https://github.com/facebook/rocksdb/pull/1970

Differential Revision: D4679419

Pulled By: ajkr

fbshipit-source-id: 3789cd8
This commit is contained in:
Andrew Kryczka 2017-03-08 17:43:11 -08:00 committed by Facebook Github Bot
parent 12ba00ea65
commit 18fc1bc0e0
1 changed files with 2 additions and 2 deletions
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4
db/db_test.cc
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@ -2815,15 +2815,15 @@ TEST_F(DBTest, RateLimitingTest) {
ASSERT_OK(
Put(RandomString(&rnd, 32), RandomString(&rnd, (1 << 10) + 1), wo));
}
elapsed = env_->NowMicros() - start;
rate_limiter_drains =
TestGetTickerCount(options, NUMBER_RATE_LIMITER_DRAINS) -
rate_limiter_drains;
elapsed = env_->NowMicros() - start;
Close();
ASSERT_EQ(options.rate_limiter->GetTotalBytesThrough(), env_->bytes_written_);
// Most intervals should've been drained (interval time is 100ms, elapsed is
// micros)
ASSERT_GT(rate_limiter_drains, elapsed / 100000 / 2);
ASSERT_GT(rate_limiter_drains, 0);
ASSERT_LE(rate_limiter_drains, elapsed / 100000 + 1);
double ratio = env_->bytes_written_ * 1000000 / elapsed / raw_rate;
fprintf(stderr, "write rate ratio = %.2lf, expected 0.7\n", ratio);