113 lines
3.5 KiB
Python
Executable File
113 lines
3.5 KiB
Python
Executable File
#!/usr/bin/env python
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# Script to parse a logging file, extract the stats, and graph them
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#
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# Copyright (C) 2016 Kevin O'Connor <kevin@koconnor.net>
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#
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# This file may be distributed under the terms of the GNU GPLv3 license.
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import optparse, datetime
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import matplotlib.pyplot as plt, matplotlib.dates as mdates
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MAXBANDWIDTH=25000.
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MAXBUFFER=2.
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def parse_log(logname):
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f = open(logname, 'rb')
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out = []
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for line in f:
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parts = line.split()
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if not parts or parts[0] not in ('Stats', 'INFO:root:Stats'):
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#if parts and parts[0] == 'INFO:root:shutdown:':
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# break
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continue
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keyparts = dict(p.split('=', 1) for p in parts[2:])
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if keyparts.get('bytes_write', '0') == '0':
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continue
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keyparts['#sampletime'] = float(parts[1][:-1])
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out.append(keyparts)
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f.close()
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return out
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def find_print_restarts(data):
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last_print_time = 0.
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print_resets = []
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for d in data:
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print_time = float(d.get('print_time', last_print_time))
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if print_time < last_print_time:
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print_resets.append(d['#sampletime'])
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last_print_time = 0.
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else:
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last_print_time = print_time
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sample_resets = {}
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for d in data:
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st = d['#sampletime']
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while print_resets and st > print_resets[0]:
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print_resets.pop(0)
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if not print_resets:
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break
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if st + 2. * MAXBUFFER > print_resets[0]:
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sample_resets[st] = 1
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return sample_resets
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def plot_mcu(data, maxbw, outname):
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# Generate data for plot
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basetime = lasttime = data[0]['#sampletime']
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lastbw = float(data[0]['bytes_write']) + float(data[0]['bytes_retransmit'])
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sample_resets = find_print_restarts(data)
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times = []
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bwdeltas = []
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loads = []
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hostbuffers = []
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for d in data:
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st = d['#sampletime']
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timedelta = st - lasttime
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if timedelta <= 0.:
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continue
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bw = float(d['bytes_write']) + float(d['bytes_retransmit'])
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if bw < lastbw:
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lastbw = bw
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continue
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load = float(d['mcu_task_avg']) + 3*float(d['mcu_task_stddev'])
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if st - basetime < 15.:
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load = 0.
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pt = float(d['print_time'])
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hb = float(d['buffer_time'])
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if pt <= 2. * MAXBUFFER or hb >= MAXBUFFER or st in sample_resets:
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hb = 0.
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else:
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hb = 100. * (MAXBUFFER - hb) / MAXBUFFER
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hostbuffers.append(hb)
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times.append(datetime.datetime.utcfromtimestamp(st))
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bwdeltas.append(100. * (bw - lastbw) / (maxbw * timedelta))
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loads.append(100. * load / .001)
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lasttime = st
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lastbw = bw
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# Build plot
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fig, ax1 = plt.subplots()
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ax1.set_title("MCU bandwidth and load utilization")
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ax1.set_xlabel('Time')
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ax1.set_ylabel('Usage (%)')
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ax1.plot_date(times, bwdeltas, 'g', label='Bandwidth')
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ax1.plot_date(times, loads, 'r', label='MCU load')
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ax1.plot_date(times, hostbuffers, 'c', label='Host buffer')
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ax1.legend(loc='best')
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ax1.xaxis.set_major_formatter(mdates.DateFormatter('%H:%M'))
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#plt.gcf().autofmt_xdate()
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ax1.grid(True)
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plt.savefig(outname)
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def main():
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usage = "%prog [options] <logfile> <outname>"
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opts = optparse.OptionParser(usage)
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options, args = opts.parse_args()
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if len(args) != 2:
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opts.error("Incorrect number of arguments")
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logname, outname = args
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data = parse_log(logname)
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if not data:
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return
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plot_mcu(data, MAXBANDWIDTH, outname)
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if __name__ == '__main__':
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main()
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