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tracer: tsplot: add a 3rd plot showing cycle vs. durations

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This is helpful to spot time-segments where we processes slower than required
for real-time playback.
This commit is contained in:
Stefan Sauer 2017-02-15 17:53:05 +01:00
parent 99cade5ba4
commit 1a5f82fc0c
1 changed files with 18 additions and 5 deletions
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23
tracer/gsttr-tsplot.py
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@ -19,6 +19,8 @@ eog <outdir>/*.png
# - this won't work well if the event is e.g. 'qos'
# - we could sort them by event type and separate them by double new-lines,
# we'd then use 'index <x>' to plot them in different colors with
# - buffer-pts should be ahead of clock time of the pipeline
# - we don't have the clock ts in the log though
import logging
import os
@ -42,7 +44,7 @@ _PLOT_SCRIPT_HEAD = Template(
''')
_PLOT_SCRIPT_BODY = Template(
'''set output '$png_file_name'
set multiplot layout 2,1 title '$pad_name'
set multiplot layout 3,1 title '$pad_name'
set style line 100 lc rgb '#dddddd' lt 0 lw 1
set grid back ls 100
@ -52,6 +54,10 @@ _PLOT_SCRIPT_BODY = Template(
set ytics
plot '$buf_file_name' using 1:2 with linespoints notitle
set ylabel "Duration (sec.msec)"
plot '$buf_file_name' using 1:3 with linespoints title "cycle", \
'' using 1:4 with linespoints title "duration"
set ylabel "Events"
set yrange [$ypos_max:10]
set ytics format ""
@ -78,6 +84,7 @@ class TsPlot(Analyzer):
'height': size[1],
}
self.buf_files = {}
self.buf_cts = {}
self.ev_files = {}
self.element_names = {}
self.pad_names = {}
@ -160,9 +167,15 @@ class TsPlot(Analyzer):
if flags & _GST_BUFFER_FLAG_DISCONT:
pad_file.write('\n')
# convert timestamps to e.g. seconds
x = int(s.values['ts']) / 1e9
y = int(s.values['buffer-pts']) / 1e9
pad_file.write('%f %f\n' % (x, y))
cts = int(s.values['ts']) / 1e9
pts = int(s.values['buffer-pts']) / 1e9
dur = int(s.values['buffer-duration']) / 1e9
if not ix in self.buf_cts:
dcts = 0
else:
dcts = cts - self.buf_cts[ix]
self.buf_cts[ix] = cts
pad_file.write('%f %f %f %f\n' % (cts, pts, dcts, dur))
def handle_tracer_entry(self, event):
if event[Parser.F_FUNCTION]:
@ -235,7 +248,7 @@ if __name__ == '__main__':
parser.add_argument('outdir', nargs='?', default='tsplot')
parser.add_argument('-g', '--ghost-pads', action='store_true',
help='also plot data for ghost-pads')
parser.add_argument('-s', '--size', action='store', default='1600x400',
parser.add_argument('-s', '--size', action='store', default='1600x600',
help='graph size as WxH')
args = parser.parse_args()