summaryrefslogtreecommitdiff
path: root/tools/power/x86/intel_pstate_tracer/intel_pstate_tracer.py
blob: 29f50d4cfea085ed40c28e3b57c11c617730999e (plain)
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
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
#!/usr/bin/python
# -*- coding: utf-8 -*-
#
""" This utility can be used to debug and tune the performance of the
intel_pstate driver. This utility can be used in two ways:
- If there is Linux trace file with pstate_sample events enabled, then
this utility can parse the trace file and generate performance plots.
- If user has not specified a trace file as input via command line parameters,
then this utility enables and collects trace data for a user specified interval
and generates performance plots.

Prerequisites:
    Python version 2.7.x
    gnuplot 5.0 or higher
    gnuplot-py 1.8
    (Most of the distributions have these required packages. They may be called
     gnuplot-py, phython-gnuplot. )

    HWP (Hardware P-States are disabled)
    Kernel config for Linux trace is enabled

    see print_help(): for Usage and Output details

"""
from __future__ import print_function
from datetime import datetime
import subprocess
import os
import time
import re
import sys
import getopt
import Gnuplot
from numpy import *
from decimal import *

__author__ = "Srinivas Pandruvada"
__copyright__ = " Copyright (c) 2017, Intel Corporation. "
__license__ = "GPL version 2"


MAX_CPUS = 256

# Define the csv file columns
C_COMM = 18
C_GHZ = 17
C_ELAPSED = 16
C_SAMPLE = 15
C_DURATION = 14
C_LOAD = 13
C_BOOST = 12
C_FREQ = 11
C_TSC = 10
C_APERF = 9
C_MPERF = 8
C_TO = 7
C_FROM = 6
C_SCALED = 5
C_CORE = 4
C_USEC = 3
C_SEC = 2
C_CPU = 1

global sample_num, last_sec_cpu, last_usec_cpu, start_time, testname

# 11 digits covers uptime to 115 days
getcontext().prec = 11

sample_num =0
last_sec_cpu = [0] * MAX_CPUS
last_usec_cpu = [0] * MAX_CPUS

def print_help():
    print('intel_pstate_tracer.py:')
    print('  Usage:')
    print('    If the trace file is available, then to simply parse and plot, use (sudo not required):')
    print('      ./intel_pstate_tracer.py [-c cpus] -t <trace_file> -n <test_name>')
    print('    Or')
    print('      ./intel_pstate_tracer.py [--cpu cpus] ---trace_file <trace_file> --name <test_name>')
    print('    To generate trace file, parse and plot, use (sudo required):')
    print('      sudo ./intel_pstate_tracer.py [-c cpus] -i <interval> -n <test_name>')
    print('    Or')
    print('      sudo ./intel_pstate_tracer.py [--cpu cpus] --interval <interval> --name <test_name>')
    print('    Optional argument:')
    print('      cpus:  comma separated list of CPUs')
    print('  Output:')
    print('    If not already present, creates a "results/test_name" folder in the current working directory with:')
    print('      cpu.csv - comma seperated values file with trace contents and some additional calculations.')
    print('      cpu???.csv - comma seperated values file for CPU number ???.')
    print('      *.png - a variety of PNG format plot files created from the trace contents and the additional calculations.')
    print('  Notes:')
    print('    Avoid the use of _ (underscore) in test names, because in gnuplot it is a subscript directive.')
    print('    Maximum number of CPUs is {0:d}. If there are more the script will abort with an error.'.format(MAX_CPUS))
    print('    Off-line CPUs cause the script to list some warnings, and create some empty files. Use the CPU mask feature for a clean run.')
    print('    Empty y range warnings for autoscaled plots can occur and can be ignored.')

def plot_perf_busy_with_sample(cpu_index):
    """ Plot method to per cpu information """

    file_name = 'cpu{:0>3}.csv'.format(cpu_index)
    if os.path.exists(file_name):
        output_png = "cpu%03d_perf_busy_vs_samples.png" % cpu_index
        g_plot = common_all_gnuplot_settings(output_png)
        g_plot('set yrange [0:40]')
        g_plot('set y2range [0:200]')
        g_plot('set y2tics 0, 10')
        g_plot('set title "{} : cpu perf busy vs. sample : CPU {:0>3} : {:%F %H:%M}"'.format(testname, cpu_index, datetime.now()))
#       Override common
        g_plot('set xlabel "Samples"')
        g_plot('set ylabel "P-State"')
        g_plot('set y2label "Scaled Busy/performance/io-busy(%)"')
        set_4_plot_linestyles(g_plot)
        g_plot('plot "' + file_name + '" using {:d}:{:d} with linespoints linestyle 1 axis x1y2 title "performance",\\'.format(C_SAMPLE, C_CORE))
        g_plot('"' + file_name + '" using {:d}:{:d} with linespoints linestyle 2 axis x1y2 title "scaled-busy",\\'.format(C_SAMPLE, C_SCALED))
        g_plot('"' + file_name + '" using {:d}:{:d} with linespoints linestyle 3 axis x1y2 title "io-boost",\\'.format(C_SAMPLE, C_BOOST))
        g_plot('"' + file_name + '" using {:d}:{:d} with linespoints linestyle 4 axis x1y1 title "P-State"'.format(C_SAMPLE, C_TO))

def plot_perf_busy(cpu_index):
    """ Plot some per cpu information """

    file_name = 'cpu{:0>3}.csv'.format(cpu_index)
    if os.path.exists(file_name):
        output_png = "cpu%03d_perf_busy.png" % cpu_index
        g_plot = common_all_gnuplot_settings(output_png)
        g_plot('set yrange [0:40]')
        g_plot('set y2range [0:200]')
        g_plot('set y2tics 0, 10')
        g_plot('set title "{} : perf busy : CPU {:0>3} : {:%F %H:%M}"'.format(testname, cpu_index, datetime.now()))
        g_plot('set ylabel "P-State"')
        g_plot('set y2label "Scaled Busy/performance/io-busy(%)"')
        set_4_plot_linestyles(g_plot)
        g_plot('plot "' + file_name + '" using {:d}:{:d} with linespoints linestyle 1 axis x1y2 title "performance",\\'.format(C_ELAPSED, C_CORE))
        g_plot('"' + file_name + '" using {:d}:{:d} with linespoints linestyle 2 axis x1y2 title "scaled-busy",\\'.format(C_ELAPSED, C_SCALED))
        g_plot('"' + file_name + '" using {:d}:{:d} with linespoints linestyle 3 axis x1y2 title "io-boost",\\'.format(C_ELAPSED, C_BOOST))
        g_plot('"' + file_name + '" using {:d}:{:d} with linespoints linestyle 4 axis x1y1 title "P-State"'.format(C_ELAPSED, C_TO))

def plot_durations(cpu_index):
    """ Plot per cpu durations """

    file_name = 'cpu{:0>3}.csv'.format(cpu_index)
    if os.path.exists(file_name):
        output_png = "cpu%03d_durations.png" % cpu_index
        g_plot = common_all_gnuplot_settings(output_png)
#       Should autoscale be used here? Should seconds be used here?
        g_plot('set yrange [0:5000]')
        g_plot('set ytics 0, 500')
        g_plot('set title "{} : durations : CPU {:0>3} : {:%F %H:%M}"'.format(testname, cpu_index, datetime.now()))
        g_plot('set ylabel "Timer Duration (MilliSeconds)"')
#       override common
        g_plot('set key off')
        set_4_plot_linestyles(g_plot)
        g_plot('plot "' + file_name + '" using {:d}:{:d} with linespoints linestyle 1 axis x1y1'.format(C_ELAPSED, C_DURATION))

def plot_loads(cpu_index):
    """ Plot per cpu loads """

    file_name = 'cpu{:0>3}.csv'.format(cpu_index)
    if os.path.exists(file_name):
        output_png = "cpu%03d_loads.png" % cpu_index
        g_plot = common_all_gnuplot_settings(output_png)
        g_plot('set yrange [0:100]')
        g_plot('set ytics 0, 10')
        g_plot('set title "{} : loads : CPU {:0>3} : {:%F %H:%M}"'.format(testname, cpu_index, datetime.now()))
        g_plot('set ylabel "CPU load (percent)"')
#       override common
        g_plot('set key off')
        set_4_plot_linestyles(g_plot)
        g_plot('plot "' + file_name + '" using {:d}:{:d} with linespoints linestyle 1 axis x1y1'.format(C_ELAPSED, C_LOAD))

def plot_pstate_cpu_with_sample():
    """ Plot all cpu information """

    if os.path.exists('cpu.csv'):
        output_png = 'all_cpu_pstates_vs_samples.png'
        g_plot = common_all_gnuplot_settings(output_png)
        g_plot('set yrange [0:40]')
#       override common
        g_plot('set xlabel "Samples"')
        g_plot('set ylabel "P-State"')
        g_plot('set title "{} : cpu pstate vs. sample : {:%F %H:%M}"'.format(testname, datetime.now()))
        title_list = subprocess.check_output('ls cpu???.csv | sed -e \'s/.csv//\'',shell=True).replace('\n', ' ')
        plot_str = "plot for [i in title_list] i.'.csv' using {:d}:{:d} pt 7 ps 1 title i".format(C_SAMPLE, C_TO)
        g_plot('title_list = "{}"'.format(title_list))
        g_plot(plot_str)

def plot_pstate_cpu():
    """ Plot all cpu information from csv files """

    output_png = 'all_cpu_pstates.png'
    g_plot = common_all_gnuplot_settings(output_png)
    g_plot('set yrange [0:40]')
    g_plot('set ylabel "P-State"')
    g_plot('set title "{} : cpu pstates : {:%F %H:%M}"'.format(testname, datetime.now()))

#    the following command is really cool, but doesn't work with the CPU masking option because it aborts on the first missing file.
#    plot_str = 'plot for [i=0:*] file=sprintf("cpu%03d.csv",i) title_s=sprintf("cpu%03d",i) file using 16:7 pt 7 ps 1 title title_s'
#
    title_list = subprocess.check_output('ls cpu???.csv | sed -e \'s/.csv//\'',shell=True).replace('\n', ' ')
    plot_str = "plot for [i in title_list] i.'.csv' using {:d}:{:d} pt 7 ps 1 title i".format(C_ELAPSED, C_TO)
    g_plot('title_list = "{}"'.format(title_list))
    g_plot(plot_str)

def plot_load_cpu():
    """ Plot all cpu loads """

    output_png = 'all_cpu_loads.png'
    g_plot = common_all_gnuplot_settings(output_png)
    g_plot('set yrange [0:100]')
    g_plot('set ylabel "CPU load (percent)"')
    g_plot('set title "{} : cpu loads : {:%F %H:%M}"'.format(testname, datetime.now()))

    title_list = subprocess.check_output('ls cpu???.csv | sed -e \'s/.csv//\'',shell=True).replace('\n', ' ')
    plot_str = "plot for [i in title_list] i.'.csv' using {:d}:{:d} pt 7 ps 1 title i".format(C_ELAPSED, C_LOAD)
    g_plot('title_list = "{}"'.format(title_list))
    g_plot(plot_str)

def plot_frequency_cpu():
    """ Plot all cpu frequencies """

    output_png = 'all_cpu_frequencies.png'
    g_plot = common_all_gnuplot_settings(output_png)
    g_plot('set yrange [0:4]')
    g_plot('set ylabel "CPU Frequency (GHz)"')
    g_plot('set title "{} : cpu frequencies : {:%F %H:%M}"'.format(testname, datetime.now()))

    title_list = subprocess.check_output('ls cpu???.csv | sed -e \'s/.csv//\'',shell=True).replace('\n', ' ')
    plot_str = "plot for [i in title_list] i.'.csv' using {:d}:{:d} pt 7 ps 1 title i".format(C_ELAPSED, C_FREQ)
    g_plot('title_list = "{}"'.format(title_list))
    g_plot(plot_str)

def plot_duration_cpu():
    """ Plot all cpu durations """

    output_png = 'all_cpu_durations.png'
    g_plot = common_all_gnuplot_settings(output_png)
    g_plot('set yrange [0:5000]')
    g_plot('set ytics 0, 500')
    g_plot('set ylabel "Timer Duration (MilliSeconds)"')
    g_plot('set title "{} : cpu durations : {:%F %H:%M}"'.format(testname, datetime.now()))

    title_list = subprocess.check_output('ls cpu???.csv | sed -e \'s/.csv//\'',shell=True).replace('\n', ' ')
    plot_str = "plot for [i in title_list] i.'.csv' using {:d}:{:d} pt 7 ps 1 title i".format(C_ELAPSED, C_DURATION)
    g_plot('title_list = "{}"'.format(title_list))
    g_plot(plot_str)

def plot_scaled_cpu():
    """ Plot all cpu scaled busy """

    output_png = 'all_cpu_scaled.png'
    g_plot = common_all_gnuplot_settings(output_png)
#   autoscale this one, no set y range
    g_plot('set ylabel "Scaled Busy (Unitless)"')
    g_plot('set title "{} : cpu scaled busy : {:%F %H:%M}"'.format(testname, datetime.now()))

    title_list = subprocess.check_output('ls cpu???.csv | sed -e \'s/.csv//\'',shell=True).replace('\n', ' ')
    plot_str = "plot for [i in title_list] i.'.csv' using {:d}:{:d} pt 7 ps 1 title i".format(C_ELAPSED, C_SCALED)
    g_plot('title_list = "{}"'.format(title_list))
    g_plot(plot_str)

def plot_boost_cpu():
    """ Plot all cpu IO Boosts """

    output_png = 'all_cpu_boost.png'
    g_plot = common_all_gnuplot_settings(output_png)
    g_plot('set yrange [0:100]')
    g_plot('set ylabel "CPU IO Boost (percent)"')
    g_plot('set title "{} : cpu io boost : {:%F %H:%M}"'.format(testname, datetime.now()))

    title_list = subprocess.check_output('ls cpu???.csv | sed -e \'s/.csv//\'',shell=True).replace('\n', ' ')
    plot_str = "plot for [i in title_list] i.'.csv' using {:d}:{:d} pt 7 ps 1 title i".format(C_ELAPSED, C_BOOST)
    g_plot('title_list = "{}"'.format(title_list))
    g_plot(plot_str)

def plot_ghz_cpu():
    """ Plot all cpu tsc ghz """

    output_png = 'all_cpu_ghz.png'
    g_plot = common_all_gnuplot_settings(output_png)
#   autoscale this one, no set y range
    g_plot('set ylabel "TSC Frequency (GHz)"')
    g_plot('set title "{} : cpu TSC Frequencies (Sanity check calculation) : {:%F %H:%M}"'.format(testname, datetime.now()))

    title_list = subprocess.check_output('ls cpu???.csv | sed -e \'s/.csv//\'',shell=True).replace('\n', ' ')
    plot_str = "plot for [i in title_list] i.'.csv' using {:d}:{:d} pt 7 ps 1 title i".format(C_ELAPSED, C_GHZ)
    g_plot('title_list = "{}"'.format(title_list))
    g_plot(plot_str)

def common_all_gnuplot_settings(output_png):
    """ common gnuplot settings for multiple CPUs one one graph. """

    g_plot = common_gnuplot_settings()
    g_plot('set output "' + output_png + '"')
    return(g_plot)

def common_gnuplot_settings():
    """ common gnuplot settings. """

    g_plot = Gnuplot.Gnuplot(persist=1)
#   The following line is for rigor only. It seems to be assumed for .csv files
    g_plot('set datafile separator \",\"')
    g_plot('set ytics nomirror')
    g_plot('set xtics nomirror')
    g_plot('set xtics font ", 10"')
    g_plot('set ytics font ", 10"')
    g_plot('set tics out scale 1.0')
    g_plot('set grid')
    g_plot('set key out horiz')
    g_plot('set key bot center')
    g_plot('set key samplen 2 spacing .8 font ", 9"')
    g_plot('set term png size 1200, 600')
    g_plot('set title font ", 11"')
    g_plot('set ylabel font ", 10"')
    g_plot('set xlabel font ", 10"')
    g_plot('set xlabel offset 0, 0.5')
    g_plot('set xlabel "Elapsed Time (Seconds)"')
    return(g_plot)

def set_4_plot_linestyles(g_plot):
    """ set the linestyles used for 4 plots in 1 graphs. """

    g_plot('set style line 1 linetype 1 linecolor rgb "green" pointtype -1')
    g_plot('set style line 2 linetype 1 linecolor rgb "red" pointtype -1')
    g_plot('set style line 3 linetype 1 linecolor rgb "purple" pointtype -1')
    g_plot('set style line 4 linetype 1 linecolor rgb "blue" pointtype -1')

def store_csv(cpu_int, time_pre_dec, time_post_dec, core_busy, scaled, _from, _to, mperf, aperf, tsc, freq_ghz, io_boost, common_comm, load, duration_ms, sample_num, elapsed_time, tsc_ghz):
    """ Store master csv file information """

    global graph_data_present

    if cpu_mask[cpu_int] == 0:
        return

    try:
        f_handle = open('cpu.csv', 'a')
        string_buffer = "CPU_%03u, %05u, %06u, %u, %u, %u, %u, %u, %u, %u, %.4f, %u, %.2f, %.3f, %u, %.3f, %.3f, %s\n" % (cpu_int, int(time_pre_dec), int(time_post_dec), int(core_busy), int(scaled), int(_from), int(_to), int(mperf), int(aperf), int(tsc), freq_ghz, int(io_boost), load, duration_ms, sample_num, elapsed_time, tsc_ghz, common_comm)
        f_handle.write(string_buffer);
        f_handle.close()
    except:
        print('IO error cpu.csv')
        return

    graph_data_present = True;

def split_csv():
    """ seperate the all csv file into per CPU csv files. """

    global current_max_cpu

    if os.path.exists('cpu.csv'):
        for index in range(0, current_max_cpu + 1):
            if cpu_mask[int(index)] != 0:
                os.system('grep -m 1 common_cpu cpu.csv > cpu{:0>3}.csv'.format(index))
                os.system('grep CPU_{:0>3} cpu.csv >> cpu{:0>3}.csv'.format(index, index))

def fix_ownership(path):
    """Change the owner of the file to SUDO_UID, if required"""

    uid = os.environ.get('SUDO_UID')
    gid = os.environ.get('SUDO_GID')
    if uid is not None:
        os.chown(path, int(uid), int(gid))

def cleanup_data_files():
    """ clean up existing data files """

    if os.path.exists('cpu.csv'):
        os.remove('cpu.csv')
    f_handle = open('cpu.csv', 'a')
    f_handle.write('common_cpu, common_secs, common_usecs, core_busy, scaled_busy, from, to, mperf, aperf, tsc, freq, boost, load, duration_ms, sample_num, elapsed_time, tsc_ghz, common_comm')
    f_handle.write('\n')
    f_handle.close()

def clear_trace_file():
    """ Clear trace file """

    try:
        f_handle = open('/sys/kernel/debug/tracing/trace', 'w')
        f_handle.close()
    except:
        print('IO error clearing trace file ')
        quit()

def enable_trace():
    """ Enable trace """

    try:
       open('/sys/kernel/debug/tracing/events/power/pstate_sample/enable'
                 , 'w').write("1")
    except:
        print('IO error enabling trace ')
        quit()

def disable_trace():
    """ Disable trace """

    try:
       open('/sys/kernel/debug/tracing/events/power/pstate_sample/enable'
                 , 'w').write("0")
    except:
        print('IO error disabling trace ')
        quit()

def set_trace_buffer_size():
    """ Set trace buffer size """

    try:
       open('/sys/kernel/debug/tracing/buffer_size_kb'
                 , 'w').write("10240")
    except:
        print('IO error setting trace buffer size ')
        quit()

def free_trace_buffer():
    """ Free the trace buffer memory """

    try:
       open('/sys/kernel/debug/tracing/buffer_size_kb'
                 , 'w').write("1")
    except:
        print('IO error setting trace buffer size ')
        quit()

def read_trace_data(filename):
    """ Read and parse trace data """

    global current_max_cpu
    global sample_num, last_sec_cpu, last_usec_cpu, start_time

    try:
        data = open(filename, 'r').read()
    except:
        print('Error opening ', filename)
        quit()

    for line in data.splitlines():
        search_obj = \
            re.search(r'(^(.*?)\[)((\d+)[^\]])(.*?)(\d+)([.])(\d+)(.*?core_busy=)(\d+)(.*?scaled=)(\d+)(.*?from=)(\d+)(.*?to=)(\d+)(.*?mperf=)(\d+)(.*?aperf=)(\d+)(.*?tsc=)(\d+)(.*?freq=)(\d+)'
                      , line)

        if search_obj:
            cpu = search_obj.group(3)
            cpu_int = int(cpu)
            cpu = str(cpu_int)

            time_pre_dec = search_obj.group(6)
            time_post_dec = search_obj.group(8)
            core_busy = search_obj.group(10)
            scaled = search_obj.group(12)
            _from = search_obj.group(14)
            _to = search_obj.group(16)
            mperf = search_obj.group(18)
            aperf = search_obj.group(20)
            tsc = search_obj.group(22)
            freq = search_obj.group(24)
            common_comm = search_obj.group(2).replace(' ', '')

            # Not all kernel versions have io_boost field
            io_boost = '0'
            search_obj = re.search(r'.*?io_boost=(\d+)', line)
            if search_obj:
                io_boost = search_obj.group(1)

            if sample_num == 0 :
                start_time = Decimal(time_pre_dec) + Decimal(time_post_dec) / Decimal(1000000)
            sample_num += 1

            if last_sec_cpu[cpu_int] == 0 :
                last_sec_cpu[cpu_int] = time_pre_dec
                last_usec_cpu[cpu_int] = time_post_dec
            else :
                duration_us = (int(time_pre_dec) - int(last_sec_cpu[cpu_int])) * 1000000 + (int(time_post_dec) - int(last_usec_cpu[cpu_int]))
                duration_ms = Decimal(duration_us) / Decimal(1000)
                last_sec_cpu[cpu_int] = time_pre_dec
                last_usec_cpu[cpu_int] = time_post_dec
                elapsed_time = Decimal(time_pre_dec) + Decimal(time_post_dec) / Decimal(1000000) - start_time
                load = Decimal(int(mperf)*100)/ Decimal(tsc)
                freq_ghz = Decimal(freq)/Decimal(1000000)
#               Sanity check calculation, typically anomalies indicate missed samples
#               However, check for 0 (should never occur)
                tsc_ghz = Decimal(0)
                if duration_ms != Decimal(0) :
                    tsc_ghz = Decimal(tsc)/duration_ms/Decimal(1000000)
                store_csv(cpu_int, time_pre_dec, time_post_dec, core_busy, scaled, _from, _to, mperf, aperf, tsc, freq_ghz, io_boost, common_comm, load, duration_ms, sample_num, elapsed_time, tsc_ghz)

            if cpu_int > current_max_cpu:
                current_max_cpu = cpu_int
# End of for each trace line loop
# Now seperate the main overall csv file into per CPU csv files.
    split_csv()

interval = ""
filename = ""
cpu_list = ""
testname = ""
graph_data_present = False;

valid1 = False
valid2 = False

cpu_mask = zeros((MAX_CPUS,), dtype=int)

try:
    opts, args = getopt.getopt(sys.argv[1:],"ht:i:c:n:",["help","trace_file=","interval=","cpu=","name="])
except getopt.GetoptError:
    print_help()
    sys.exit(2)
for opt, arg in opts:
    if opt == '-h':
        print()
        sys.exit()
    elif opt in ("-t", "--trace_file"):
        valid1 = True
        location = os.path.realpath(os.path.join(os.getcwd(), os.path.dirname(__file__)))
        filename = os.path.join(location, arg)
    elif opt in ("-i", "--interval"):
        valid1 = True
        interval = arg
    elif opt in ("-c", "--cpu"):
        cpu_list = arg
    elif opt in ("-n", "--name"):
        valid2 = True
        testname = arg

if not (valid1 and valid2):
    print_help()
    sys.exit()

if cpu_list:
    for p in re.split("[,]", cpu_list):
        if int(p) < MAX_CPUS :
            cpu_mask[int(p)] = 1
else:
    for i in range (0, MAX_CPUS):
        cpu_mask[i] = 1

if not os.path.exists('results'):
    os.mkdir('results')
    # The regular user needs to own the directory, not root.
    fix_ownership('results')

os.chdir('results')
if os.path.exists(testname):
    print('The test name directory already exists. Please provide a unique test name. Test re-run not supported, yet.')
    sys.exit()
os.mkdir(testname)
# The regular user needs to own the directory, not root.
fix_ownership(testname)
os.chdir(testname)

# Temporary (or perhaps not)
cur_version = sys.version_info
print('python version (should be >= 2.7):')
print(cur_version)

# Left as "cleanup" for potential future re-run ability.
cleanup_data_files()

if interval:
    filename = "/sys/kernel/debug/tracing/trace"
    clear_trace_file()
    set_trace_buffer_size()
    enable_trace()
    print('Sleeping for ', interval, 'seconds')
    time.sleep(int(interval))
    disable_trace()

current_max_cpu = 0

read_trace_data(filename)

if graph_data_present == False:
    print('No valid data to plot')
    sys.exit(2)

for cpu_no in range(0, current_max_cpu + 1):
    plot_perf_busy_with_sample(cpu_no)
    plot_perf_busy(cpu_no)
    plot_durations(cpu_no)
    plot_loads(cpu_no)

plot_pstate_cpu_with_sample()
plot_pstate_cpu()
plot_load_cpu()
plot_frequency_cpu()
plot_duration_cpu()
plot_scaled_cpu()
plot_boost_cpu()
plot_ghz_cpu()

# It is preferrable, but not necessary, that the regular user owns the files, not root.
for root, dirs, files in os.walk('.'):
    for f in files:
        fix_ownership(f)

clear_trace_file()
# Free the memory
if interval:
    free_trace_buffer()

os.chdir('../../')