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graphstats: Add support for graphing system load 

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
This commit is contained in:
Kevin O'Connor 2020-09-16 21:29:58 -04:00
parent 1208ec1f52
commit 3efb424d66
1 changed files with 46 additions and 0 deletions
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46
scripts/graphstats.py
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@ -137,6 +137,48 @@ def plot_mcu(data, maxbw):
ax1.grid(True) ax1.grid(True)
return fig return fig
def plot_system(data):
# Generate data for plot
lasttime = data[0]['#sampletime']
lastcputime = float(data[0]['cputime'])
times = []
sysloads = []
cputimes = []
memavails = []
for d in data:
st = d['#sampletime']
timedelta = st - lasttime
if timedelta <= 0.:
continue
lasttime = st
times.append(datetime.datetime.utcfromtimestamp(st))
cputime = float(d['cputime'])
cpudelta = max(0., min(1.5, (cputime - lastcputime) / timedelta))
lastcputime = cputime
cputimes.append(cpudelta * 100.)
sysloads.append(float(d['sysload']) * 100.)
memavails.append(float(d['memavail']))
# Build plot
fig, ax1 = matplotlib.pyplot.subplots()
ax1.set_title("MCU bandwidth and load utilization")
ax1.set_xlabel('Time')
ax1.set_ylabel('Load (% of a core)')
ax1.plot_date(times, sysloads, '-', label='system load',
color='cyan', alpha=0.8)
ax1.plot_date(times, cputimes, '-', label='process time',
color='red', alpha=0.8)
ax2 = ax1.twinx()
ax2.set_ylabel('Available memory (KB)')
ax2.plot_date(times, memavails, '-', label='system memory',
color='yellow', alpha=0.3)
fontP = matplotlib.font_manager.FontProperties()
fontP.set_size('x-small')
ax1.legend(loc='best', prop=fontP)
ax1.xaxis.set_major_formatter(matplotlib.dates.DateFormatter('%H:%M'))
ax1.grid(True)
return fig
def plot_frequency(data, mcu): def plot_frequency(data, mcu):
all_keys = {} all_keys = {}
for d in data: for d in data:
@ -211,6 +253,8 @@ def main():
opts = optparse.OptionParser(usage) opts = optparse.OptionParser(usage)
opts.add_option("-f", "--frequency", action="store_true", opts.add_option("-f", "--frequency", action="store_true",
help="graph mcu frequency") help="graph mcu frequency")
opts.add_option("-s", "--system", action="store_true",
help="graph system load")
opts.add_option("-o", "--output", type="string", dest="output", opts.add_option("-o", "--output", type="string", dest="output",
default=None, help="filename of output graph") default=None, help="filename of output graph")
opts.add_option("-t", "--temperature", type="string", dest="heater", opts.add_option("-t", "--temperature", type="string", dest="heater",
@ -233,6 +277,8 @@ def main():
fig = plot_temperature(data, options.heater) fig = plot_temperature(data, options.heater)
elif options.frequency: elif options.frequency:
fig = plot_frequency(data, options.mcu) fig = plot_frequency(data, options.mcu)
elif options.system:
fig = plot_system(data)
else: else:
fig = plot_mcu(data, MAXBANDWIDTH) fig = plot_mcu(data, MAXBANDWIDTH)