1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
|
# SPDX-License-Identifier: Apache-2.0
#
# Copyright (C) 2017, Google, ARM Limited and contributors.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
""" IRQ Analysis Module"""
from analysis_module import AnalysisModule
import matplotlib.pyplot as plt
import pylab as pl
import pandas as pd
import math
class IRQAnalysis(AnalysisModule):
"""
Support for plotting IRQ Analysis data
:param trace: input Trace object
:type trace: :mod:`libs.utils.Trace`
"""
def __init__(self, trace):
super(IRQAnalysis, self).__init__(trace)
def plotIRQHistogram(self, title="Histogram of IRQ events", irq=None, bin_size_s=0.25):
"""
plot a histogram of irq events.
:param title: title to afix to the plot
:type title: str
:param name: the irq name or number to plot
:type name: str or int
:param bin_size_s: the size of the bins for the histogram in seconds
:type bin_size_s: float
"""
df = self._dfg_trace_event('irq_handler_entry')
if len(df) == 0:
self._log.warning('no irq events to plot')
return
if type(irq) is int:
irqs = df[df.irq == irq]
elif type(irq) is str:
irqs = df[df.name == irq]
else:
raise TypeError('must give an irq number or name to plot')
pd.options.mode.chained_assignment = None
irqs['timestamp'] = irqs.index
fig, axes = plt.subplots()
plt.suptitle(title, y=.97, fontsize=16, horizontalalignment='center')
if len(irqs) > 0:
name = irqs.iloc[0]["name"]
irq_number = irqs.iloc[0]["irq"]
bin_range = pl.frange(self._trace.x_min, self._trace.x_max, bin_size_s)
irqs.hist(ax=axes, column='timestamp', bins=bin_range,
grid=True, facecolor='green', alpha=0.5, edgecolor="b",
range=(self._trace.x_min, self._trace.x_max))
else:
self._log.warning('no irq events to plot')
return
axes.set_title("irq_name = " + str(name) + ", bin size (s) " + str(bin_size_s))
axes.set_xlim(self._trace.x_min, self._trace.x_max)
axes.set_ylabel('number of IRQs')
axes.set_xlabel('seconds')
axes.grid(True)
figname = '{}/{}{}.png'\
.format(self._trace.plots_dir, self._trace.plots_prefix, "irq_" + str(irq_number) + "_" + str(name))
pl.savefig(figname, bbox_inches='tight')
|
