ZTS: zdb_block_size_histogram increase variance

The expected variance for this test case was originally set at 10%
based on local testing.  Additional testing via the CI has show it
can be as large as 11%.  Increase the expected maximum to 12% to
prevent this test from incorrectly failing.

Reviewed-by: Ryan Moeller <ryan@iXsystems.com>
Reviewed-by: George Melikov <mail@gmelikov.ru>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #11148
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Brian Behlendorf 2020-11-03 09:20:34 -08:00 committed by GitHub
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@ -209,11 +209,11 @@ function histo_check_test_pool
# 4096 blocksize count for asize. For verification we stick
# to just lsize counts.
#
# The max_variance is hard-coded here at 10%. testing so far
# has shown this to be in the range of 2%-8% so we leave a
# generous allowance... This might need changes in the future
# The max_variance is hard-coded here at 12% to leave us some
# margin. Testing has shown this normally to be in the range
# of 2%-8%, but it may be as large as 11%.
###################
let max_variance=10
let max_variance=12
let fail_value=0
let error_count=0
log_note "Comparisons for ${pool}"