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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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tracer: tsplot: separate the event section
Place the events below the buffer-ts. This makes it more readable in many cases.
This commit is contained in:
Stefan Sauer
parent
e88433a9ce
commit
e4f05cb577
1 changed files with 96 additions and 33 deletions
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@ -13,14 +13,12 @@ eog <outdir>/*.png
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'''
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# TODO:
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# - the event labels are still way too dense
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# - improve event plot
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# - ideally each event is a vertical line
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# http://stackoverflow.com/questions/35105672/vertical-lines-from-data-in-file-in-time-series-plot-using-gnuplot
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# - this won't work well if the event is e.g. 'qos'
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# - we could sort them by event type and separarate them by double new-lines,
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# - we could sort them by event type and separate them by double new-lines,
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# we'd then use 'index <x>' to plot them in different colors with
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# - instead of just skipping duplicates, we could count them, store min/max ts
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# and draw segments (is there something like labeled horizontal error bars?)
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import logging
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import os
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@ -44,8 +42,23 @@ _PLOT_SCRIPT_HEAD = Template(
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''')
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_PLOT_SCRIPT_BODY = Template(
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'''set output '$png_file_name'
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plot '$buf_file_name' using 1:2 with linespoints title '$pad_name', \
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'$ev_file_name' using 1:(0):2 with labels rotate center font ',7' notitle')
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set multiplot layout 2,1 title '$pad_name'
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set style line 100 lc rgb '#dddddd' lt 0 lw 1
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set grid back ls 100
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set xlabel "Clock Time (sec.msec)"
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set ylabel "Buffer Time (sec.msec)"
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set yrange [*:*]
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set ytics
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plot '$buf_file_name' using 1:2 with linespoints notitle
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set ylabel "Events"
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set yrange [$ypos_max:10]
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set ytics format ""
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plot '$ev_file_name' using 1:4:3:(0) with vectors heads size screen 0.008,90 notitle, \
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'' using 2:4 with points notitle, \
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'' using 2:4:5 with labels font ',7' offset char 0,-0.5 notitle
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unset multiplot
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''')
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class TsPlot(Analyzer):
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@ -69,6 +82,8 @@ class TsPlot(Analyzer):
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self.element_names = {}
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self.pad_names = {}
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self.ev_labels = {}
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self.ev_data = {}
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self.ev_ypos = {}
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def _get_data_file(self, files, key, name_template):
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data_file = files.get(key)
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@ -80,6 +95,75 @@ class TsPlot(Analyzer):
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files[key] = data_file
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return data_file
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def _log_event_data(self, pad_file, ix):
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data = self.ev_data.get(ix)
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if not data:
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return
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l = self.ev_labels[ix]
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ct = data['ct']
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x1 = data['first-ts']
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# TODO: scale 'y' according to max-y of buf or do a multiplot
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y = (1 + data['ypos']) * -10
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if ct == 1:
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pad_file.write('%f %f %f %f "%s"\n' % (x1, x1, 0.0, y, l))
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else:
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x2 = data['last-ts']
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xd = (x2 - x1)
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xm = x1 + xd / 2
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pad_file.write('%f %f %f %f "%s (%d)"\n' % (x1, xm, xd, y, l, ct))
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def _log_event(self, s):
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# build a [ts, event-name] data file
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ix = int(s.values['pad-ix'])
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pad_file = self._get_data_file(self.ev_files, ix, '%s/ev_%d_%s.dat')
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if not pad_file:
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return
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# convert timestamps to seconds
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x = int(s.values['ts']) / 1e9
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# some events fire often, labeling each would be unreadable
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# so we aggregate a series of events of the same type
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l = s.values['name']
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if l == self.ev_labels.get(ix):
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# count lines and track last ts
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data = self.ev_data[ix]
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data['ct'] += 1
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data['last-ts'] = x
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else:
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self._log_event_data(pad_file, ix)
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# start new data, assign a -y coord by event type
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if not ix in self.ev_ypos:
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ypos = {}
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self.ev_ypos[ix] = ypos
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else:
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ypos = self.ev_ypos[ix]
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if l in ypos:
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y = ypos[l]
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else:
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y = len(ypos)
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ypos[l] = y
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self.ev_labels[ix] = l
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self.ev_data[ix] = {
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'ct': 1,
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'first-ts': x,
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'ypos': y,
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}
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def _log_buffer(self, s):
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if not int(s.values['have-buffer-pts']):
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return
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# build a [ts, buffer-pts] data file
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ix = int(s.values['pad-ix'])
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pad_file = self._get_data_file(self.buf_files, ix, '%s/buf_%d_%s.dat')
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if not pad_file:
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return
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flags = int(s.values['buffer-flags'])
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if flags & _GST_BUFFER_FLAG_DISCONT:
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pad_file.write('\n')
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# convert timestamps to e.g. seconds
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x = int(s.values['ts']) / 1e9
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y = int(s.values['buffer-pts']) / 1e9
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pad_file.write('%f %f\n' % (x, y))
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def handle_tracer_entry(self, event):
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if event[Parser.F_FUNCTION]:
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return
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@ -109,35 +193,13 @@ class TsPlot(Analyzer):
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ix = int(s.values['ix'])
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self.pad_names[ix] = "%s.%s" % (parent_name, s.values['name'])
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elif entry_name == 'event':
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# build a [ts, event-name] data file
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ix = int(s.values['pad-ix'])
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pad_file = self._get_data_file(self.ev_files, ix, '%s/ev_%d_%s.dat')
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if pad_file:
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# convert timestamps to seconds
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x = int(s.values['ts']) / 1e9
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l = s.values['name']
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if l == self.ev_labels.get(ix):
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# omit repeated labels for readability
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pad_file.write('%f ""\n' % x)
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else:
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pad_file.write('%f "%s"\n' % (x, l))
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self.ev_labels[ix] = l
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self._log_event(s)
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else: # 'buffer'
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if int(s.values['have-buffer-pts']):
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# build a [ts, buffer-pts] data file
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ix = int(s.values['pad-ix'])
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pad_file = self._get_data_file(self.buf_files, ix, '%s/buf_%d_%s.dat')
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if pad_file:
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flags = int(s.values['buffer-flags'])
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if flags & _GST_BUFFER_FLAG_DISCONT:
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pad_file.write('\n')
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# convert timestamps to e.g. seconds
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x = int(s.values['ts']) / 1e9
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y = int(s.values['buffer-pts']) / 1e9
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pad_file.write('%f %f\n' % (x, y))
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self._log_buffer(s)
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def report(self):
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for ix, pad_file in self.ev_files.items():
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self._log_event_data(pad_file, ix)
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pad_file.close()
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script = _PLOT_SCRIPT_HEAD.substitute(self.params)
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@ -147,9 +209,10 @@ class TsPlot(Analyzer):
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buf_file_name = '%s/buf_%d_%s.dat' % (self.outdir, ix, name)
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ev_file_name = '%s/ev_%d_%s.dat' % (self.outdir, ix, name)
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png_file_name = '%s/%d_%s.png' % (self.outdir, ix, name)
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ypos_max = (2 + len(self.ev_ypos[ix])) * -10
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script += _PLOT_SCRIPT_BODY.substitute(self.params, pad_name=name,
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buf_file_name=buf_file_name, ev_file_name=ev_file_name,
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png_file_name=png_file_name)
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png_file_name=png_file_name, ypos_max=ypos_max)
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# plot PNGs
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p = Popen(['gnuplot'], stdout=DEVNULL, stdin=PIPE)
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p.communicate(input=script.encode('utf-8'))
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@ -172,7 +235,7 @@ if __name__ == '__main__':
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parser.add_argument('outdir', nargs='?', default='tsplot')
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parser.add_argument('-g', '--ghost-pads', action='store_true',
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help='also plot data for ghost-pads')
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parser.add_argument('-s', '--size', action='store', default='1600x300',
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parser.add_argument('-s', '--size', action='store', default='1600x400',
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help='graph size as WxH')
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args = parser.parse_args()
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