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graphstats: Fix case where an Xwindows display may not be available 

Matplotlib will try to open a display by default - tell it not to do
that so that it can run in batch mode on headless machines.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
This commit is contained in:
Kevin O'Connor 2017-12-30 18:20:53 -05:00
parent b05eb1e8e3
commit 7db6fa7bfc
1 changed files with 6 additions and 5 deletions
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11
scripts/graphstats.py
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@ -5,7 +5,9 @@
# #
# This file may be distributed under the terms of the GNU GPLv3 license. # This file may be distributed under the terms of the GNU GPLv3 license.
import optparse, datetime import optparse, datetime
import matplotlib.pyplot as plt, matplotlib.dates as mdates import matplotlib
matplotlib.use('Agg')
import matplotlib.pyplot, matplotlib.dates
MAXBANDWIDTH=25000. MAXBANDWIDTH=25000.
MAXBUFFER=2. MAXBUFFER=2.
@ -89,7 +91,7 @@ def plot_mcu(data, maxbw, outname, graph_awake=False):
lastbw = bw lastbw = bw
# Build plot # Build plot
fig, ax1 = plt.subplots() fig, ax1 = matplotlib.pyplot.subplots()
ax1.set_title("MCU bandwidth and load utilization") ax1.set_title("MCU bandwidth and load utilization")
ax1.set_xlabel('Time') ax1.set_xlabel('Time')
ax1.set_ylabel('Usage (%)') ax1.set_ylabel('Usage (%)')
@ -99,10 +101,9 @@ def plot_mcu(data, maxbw, outname, graph_awake=False):
ax1.plot_date(times, loads, 'r', label='MCU load') ax1.plot_date(times, loads, 'r', label='MCU load')
ax1.plot_date(times, hostbuffers, 'c', label='Host buffer') ax1.plot_date(times, hostbuffers, 'c', label='Host buffer')
ax1.legend(loc='best') ax1.legend(loc='best')
ax1.xaxis.set_major_formatter(mdates.DateFormatter('%H:%M')) ax1.xaxis.set_major_formatter(matplotlib.dates.DateFormatter('%H:%M'))
#plt.gcf().autofmt_xdate()
ax1.grid(True) ax1.grid(True)
plt.savefig(outname) fig.savefig(outname)
def main(): def main():
usage = "%prog [options] <logfile> <outname>" usage = "%prog [options] <logfile> <outname>"