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toolhead: Rework lookahead flush to be more stable during high cpu

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Change the lookahead queue so that it attempts to buffer at least
buffer_time_high amount of moves when first starting a print.  This
helps ensure the buffer is normally always full.

If the buffer falls below buffer_time_low then it is either due to the
end of a print or because octoprint/klippy is unable to keep up.
Change the code so that in this case the lookahead queue will attempt
to gather buffer_time_high amount of moves before restarting movement.

Update the default buffer_time_low to 1 second and buffer_time_high to
2 seconds.  With the above changes a smaller buffer_time_high and a
larger buffer_time_low are more practical.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
This commit is contained in:
Kevin O'Connor 2017-02-11 14:43:36 -05:00
parent 71256f9456
commit ab1eb70d1c
3 changed files with 51 additions and 23 deletions
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4
scripts/graphstats.py
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@ -8,7 +8,7 @@ import optparse, datetime
import matplotlib.pyplot as plt, matplotlib.dates as mdates
MAXBANDWIDTH=25000.
MAXBUFFER=5.
MAXBUFFER=2.
def parse_log(logname):
f = open(logname, 'rb')
@ -90,7 +90,7 @@ def plot_mcu(data, maxbw, outname):
ax1.plot_date(times, bwdeltas, 'g', label='Bandwidth')
ax1.plot_date(times, loads, 'r', label='MCU load')
ax1.plot_date(times, hostbuffers, 'c', label='Host buffer')
ax1.legend()
ax1.legend(loc='best')
ax1.xaxis.set_major_formatter(mdates.DateFormatter('%H:%M'))
#plt.gcf().autofmt_xdate()
ax1.grid(True)