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-rw-r--r--resources/tools/presentation/generator_tables.py12
-rw-r--r--resources/tools/presentation/utils.py27
2 files changed, 36 insertions, 3 deletions
diff --git a/resources/tools/presentation/generator_tables.py b/resources/tools/presentation/generator_tables.py
index acd3024f35..3bfae47d24 100644
--- a/resources/tools/presentation/generator_tables.py
+++ b/resources/tools/presentation/generator_tables.py
@@ -551,7 +551,7 @@ def table_soak_vs_ndr(table, input_data):
"{0} Stdev [Mpps]".format(table["reference"]["title"]),
"{0} Throughput [Mpps]".format(table["compare"]["title"]),
"{0} Stdev [Mpps]".format(table["compare"]["title"]),
- "Delta [%]"]
+ "Delta [%]", "Stdev of delta [%]"]
header_str = ",".join(header) + "\n"
except (AttributeError, KeyError) as err:
logging.error("The model is invalid, missing parameter: {0}".
@@ -612,7 +612,8 @@ def table_soak_vs_ndr(table, input_data):
if data_r:
data_r_mean = mean(data_r)
item.append(round(data_r_mean / 1000000, 2))
- item.append(round(stdev(data_r) / 1000000, 2))
+ data_r_stdev = stdev(data_r)
+ item.append(round(data_r_stdev / 1000000, 2))
else:
data_r_mean = None
item.extend([None, None])
@@ -620,12 +621,17 @@ def table_soak_vs_ndr(table, input_data):
if data_c:
data_c_mean = mean(data_c)
item.append(round(data_c_mean / 1000000, 2))
- item.append(round(stdev(data_c) / 1000000, 2))
+ data_c_stdev = stdev(data_c)
+ item.append(round(data_c_stdev / 1000000, 2))
else:
data_c_mean = None
item.extend([None, None])
if data_r_mean and data_c_mean is not None:
item.append(round(relative_change(data_r_mean, data_c_mean), 2))
+ delta, d_stdev = relative_change_stdev(
+ data_r_mean, data_c_mean, data_r_stdev, data_c_stdev)
+ item.append(round(delta, 2))
+ item.append(round(d_stdev, 2))
tbl_lst.append(item)
# Sort the table according to the relative change
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.