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simplebench: bench_one(): support count=1

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statistics.stdev raises if sequence length is less than two. Support
that case by hand.

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Reviewed-by: John Snow <jsnow@redhat.com>
This commit is contained in:
Vladimir Sementsov-Ogievskiy 2021-01-28 18:13:48 +03:00
parent dab346986e
commit 27eacb390e
1 changed files with 4 additions and 1 deletions
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scripts/simplebench/simplebench.py
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@ -83,7 +83,10 @@ def bench_one(test_func, test_env, test_case, count=5, initial_run=True,
dim = 'seconds'
result['dimension'] = dim
result['average'] = statistics.mean(r[dim] for r in succeeded)
result['stdev'] = statistics.stdev(r[dim] for r in succeeded)
if len(succeeded) == 1:
result['stdev'] = 0
else:
result['stdev'] = statistics.stdev(r[dim] for r in succeeded)
if len(succeeded) < count:
result['n-failed'] = count - len(succeeded)