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From: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
To: qemu-block@nongnu.org
Cc: qemu-devel@nongnu.org, den@openvz.org, vsementsov@virtuozzo.com,
	mreitz@redhat.com
Subject: [PATCH v2 2/8] simplebench: bench_one(): support count=1
Date: Thu,  4 Mar 2021 13:17:32 +0300	[thread overview]
Message-ID: <20210304101738.20248-3-vsementsov@virtuozzo.com> (raw)
In-Reply-To: <20210304101738.20248-1-vsementsov@virtuozzo.com>

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

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
---
 scripts/simplebench/simplebench.py | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/scripts/simplebench/simplebench.py b/scripts/simplebench/simplebench.py
index b153cae274..712e1f845b 100644
--- a/scripts/simplebench/simplebench.py
+++ b/scripts/simplebench/simplebench.py
@@ -92,7 +92,10 @@ 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)
-- 
2.29.2



  parent reply	other threads:[~2021-03-04 10:25 UTC|newest]

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-03-04 10:17 [PATCH v2 0/8] simplebench improvements Vladimir Sementsov-Ogievskiy
2021-03-04 10:17 ` [PATCH v2 1/8] simplebench: bench_one(): add slow_limit argument Vladimir Sementsov-Ogievskiy
2021-03-05  1:22   ` John Snow
2021-03-05  9:03     ` Vladimir Sementsov-Ogievskiy
2021-03-05 16:25       ` John Snow
2021-03-04 10:17 ` Vladimir Sementsov-Ogievskiy [this message]
2021-03-05  1:23   ` [PATCH v2 2/8] simplebench: bench_one(): support count=1 John Snow
2021-03-04 10:17 ` [PATCH v2 3/8] simplebench/bench-backup: add --compressed option Vladimir Sementsov-Ogievskiy
2021-03-04 10:17 ` [PATCH v2 4/8] simplebench/bench-backup: add target-cache argument Vladimir Sementsov-Ogievskiy
2021-03-05  1:50   ` John Snow
2021-03-04 10:17 ` [PATCH v2 5/8] simplebench/bench_block_job: handle error in BLOCK_JOB_COMPLETED Vladimir Sementsov-Ogievskiy
2021-03-05  1:47   ` John Snow
2021-03-04 10:17 ` [PATCH v2 6/8] simplebench/bench-backup: support qcow2 source files Vladimir Sementsov-Ogievskiy
2021-03-05  1:43   ` John Snow
2021-03-04 10:17 ` [PATCH v2 7/8] simplebench/bench-backup: add --count and --no-initial-run Vladimir Sementsov-Ogievskiy
2021-03-05  1:37   ` John Snow
2021-03-05  9:09     ` Vladimir Sementsov-Ogievskiy
2021-03-04 10:17 ` [PATCH v2 8/8] simplebench/bench_block_job: drop caches before test run Vladimir Sementsov-Ogievskiy
2021-03-05  1:30   ` John Snow
2021-03-05  9:11     ` Vladimir Sementsov-Ogievskiy
2021-03-05 16:30       ` John Snow
2021-03-05 16:50         ` Vladimir Sementsov-Ogievskiy
2021-03-05 16:54           ` John Snow
2021-03-04 10:44 ` [PATCH v2 9/8] MAINTAINERS: update Benchmark util: add git tree Vladimir Sementsov-Ogievskiy

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