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authorVratko Polak <vrpolak@cisco.com>2019-05-15 17:58:24 +0200
committerTibor Frank <tifrank@cisco.com>2019-05-17 06:50:13 +0000
commit081c29c91b7e5f78345cfdefd75625b27b5b4812 (patch)
treef7065c3165d7b929cb9ed92823f158e365a2bb3f /resources/tools/presentation/utils.py
parent5a6c1a5a75c76e8e63f799f5c758567c1dd75b4f (diff)
Report soak comparison: Add stdev for delta
Change-Id: Ibbff3c123afac2e68caf33f3ccd5fc4909509917 Signed-off-by: Vratko Polak <vrpolak@cisco.com>
Diffstat (limited to 'resources/tools/presentation/utils.py')
-rw-r--r--resources/tools/presentation/utils.py27
1 files changed, 27 insertions, 0 deletions
diff --git a/resources/tools/presentation/utils.py b/resources/tools/presentation/utils.py
index c350fae135..8f5630083b 100644
--- a/resources/tools/presentation/utils.py
+++ b/resources/tools/presentation/utils.py
@@ -16,6 +16,7 @@
import multiprocessing
import subprocess
+import math
import numpy as np
import logging
import csv
@@ -68,6 +69,32 @@ def relative_change(nr1, nr2):
return float(((nr2 - nr1) / nr1) * 100)
+def relative_change_stdev(mean1, mean2, std1, std2):
+ """Compute relative standard deviation of change of two values.
+
+ The "1" values are the base for comparison.
+ Results are returned as percentage (and percentual points for stdev).
+ Linearized theory is used, so results are wrong for relatively large stdev.
+
+ :param mean1: Mean of the first number.
+ :param mean2: Mean of the second number.
+ :param std1: Standard deviation estimate of the first number.
+ :param std2: Standard deviation estimate of the second number.
+ :type mean1: float
+ :type mean2: float
+ :type std1: float
+ :type std2: float
+ :returns: Relative change and its stdev.
+ :rtype: float
+ """
+ mean1, mean2 = float(mean1), float(mean2)
+ quotient = mean2 / mean1
+ first = std1 / mean1
+ second = std2 / mean2
+ std = quotient * math.sqrt(first * first + second * second)
+ return (quotient - 1) * 100, std * 100
+
+
def get_files(path, extension=None, full_path=True):
"""Generates the list of files to process.