3 # based on plot-timeline.py by Federico Mena-Quintero <federico at ximian dotcom>
5 # GST_DEBUG_NO_COLOR=1 GST_DEBUG="*:3" gst-launch-0.10 2>debug.log audiotestsrc num-buffers=10 ! audioconvert ! alsasink
6 # gst-plot-timeline.py debug.log --output=debug.png
16 FONT_NAME = "Bitstream Vera Sans"
18 # how many pixels for a second on the timeline
19 PIXELS_PER_SECOND = 300
20 # how many pixels for one line of log
24 SYSCALL_MARKER_WIDTH = 20
27 BACKGROUND_COLOR = (0, 0, 0)
29 # assumes GST_DEBUG_LOG_COLOR=1
30 # timestamp pid thread level category,file,line,msg
31 mark_regex = re.compile (r'^(\d:\d\d:\d\d\.\d+) +\d+ 0?x?[0-9a-f]+ [A-Z]+ +([-a-zA-Z0-9_]+ )(.*)')
32 mark_timestamp_group = 1
33 mark_program_group = 2
40 def __init__(self, timestamp, log):
41 self.timestamp = timestamp
43 self.timestamp_ypos = 0
46 class AccessMark(BaseMark):
49 class LastMark(BaseMark):
52 class FirstMark(BaseMark):
55 class ExecMark(BaseMark):
56 # colors = 0.75, 0.33, 0.33
57 colors = (1.0, 0.0, 0.0)
58 def __init__(self, timestamp, log):
59 BaseMark.__init__(self, timestamp,
60 'execve: ' + os.path.basename(log))
67 # don't use black or red
82 def add_line (self, str):
83 m = mark_regex.search (str)
85 timestr = m.group (mark_timestamp_group)
86 timestamp = float (timestr[5:]) + (float (timestr[2:3]) * 60.0) + (float (timestr[0]) * 60.0*60.0)
87 program = m.group (mark_program_group)
88 text = program + m.group (mark_log_group)
90 self.syscalls.append (LastMark (timestamp, text))
92 self.syscalls.append (FirstMark (timestamp, text))
94 s = AccessMark (timestamp, text)
95 program_hash = program.__hash__ ()
96 s.colors = palette[program_hash % len (palette)]
97 self.syscalls.append (s)
99 print 'No log in %s' % str
102 def parse_strace(filename):
103 parser = SyscallParser ()
105 for line in file(filename, "r").readlines():
109 parser.add_line (line)
111 return parser.syscalls
113 def normalize_timestamps(syscalls):
115 first_timestamp = syscalls[0].timestamp
117 for syscall in syscalls:
118 syscall.timestamp -= first_timestamp
120 def compute_syscall_metrics(syscalls):
121 global PIXELS_PER_SECOND
122 global PIXELS_PER_LINE
124 num_syscalls = len(syscalls)
127 metrics.width = PLOT_WIDTH
129 last_timestamp = syscalls[num_syscalls - 1].timestamp
130 num_seconds = int(math.ceil(last_timestamp))
132 time_height = num_seconds * PIXELS_PER_SECOND
133 line_height = num_syscalls * PIXELS_PER_LINE
134 if time_height > line_height:
135 metrics.height = time_height
136 print "Adjusting PIXELS_PER_LINE = %d" % PIXELS_PER_LINE
137 PIXELS_PER_LINE = metrics.height / num_syscalls
138 print " PIXELS_PER_LINE = %d" % PIXELS_PER_LINE
140 metrics.height = line_height
141 print "Adjusting PIXELS_PER_SECOND %d" % PIXELS_PER_SECOND
142 PIXELS_PER_SECOND = metrics.height / num_seconds
143 print " PIXELS_PER_SECOND %d" % PIXELS_PER_SECOND
147 for syscall in syscalls:
148 syscall.timestamp_ypos = syscall.timestamp * PIXELS_PER_SECOND
149 syscall.log_ypos = text_ypos + FONT_SIZE
151 text_ypos += PIXELS_PER_LINE
155 def plot_time_scale(surface, ctx, metrics):
156 num_seconds = (metrics.height + PIXELS_PER_SECOND - 1) / PIXELS_PER_SECOND
158 ctx.set_source_rgb(0.5, 0.5, 0.5)
159 ctx.set_line_width(1.0)
161 for i in range(num_seconds):
162 ypos = i * PIXELS_PER_SECOND
164 ctx.move_to(0, ypos + 0.5)
165 ctx.line_to(TIME_SCALE_WIDTH, ypos + 0.5)
168 ctx.move_to(0, ypos + 2 + FONT_SIZE)
169 ctx.show_text("%d s" % i)
171 def plot_syscall(surface, ctx, syscall):
172 ctx.set_source_rgb(*syscall.colors)
176 ctx.move_to(TIME_SCALE_WIDTH, syscall.timestamp_ypos)
177 ctx.line_to(TIME_SCALE_WIDTH + SYSCALL_MARKER_WIDTH, syscall.timestamp_ypos)
178 ctx.line_to(LOG_TEXT_XPOS - LOG_MARKER_WIDTH, syscall.log_ypos - FONT_SIZE / 2 + 0.5)
179 ctx.line_to(LOG_TEXT_XPOS, syscall.log_ypos - FONT_SIZE / 2 + 0.5)
184 ctx.move_to(LOG_TEXT_XPOS, syscall.log_ypos)
185 ctx.show_text("%8.5f: %s" % (syscall.timestamp, syscall.log))
187 def plot_syscalls_to_surface(syscalls, metrics):
188 num_syscalls = len(syscalls)
190 print 'picture size: %d x %d' % (metrics.width, metrics.height);
192 surface = cairo.ImageSurface(cairo.FORMAT_RGB24,
193 metrics.width, metrics.height)
195 ctx = cairo.Context(surface)
196 ctx.select_font_face(FONT_NAME)
197 ctx.set_font_size(FONT_SIZE)
201 ctx.set_source_rgb (*BACKGROUND_COLOR)
202 ctx.rectangle(0, 0, metrics.width, metrics.height)
207 plot_time_scale(surface, ctx, metrics)
211 ctx.set_line_width(1.0)
213 for syscall in syscalls:
214 plot_syscall(surface, ctx, syscall)
219 option_parser = optparse.OptionParser(
220 usage="usage: %prog -o output.png <debug.log>")
221 option_parser.add_option("-o",
222 "--output", dest="output",
224 help="Name of output file (output is a PNG file)")
226 options, args = option_parser.parse_args()
228 if not options.output:
229 print 'Please specify an output filename with "-o file.png" or "--output=file.png".'
233 print 'Please specify only one input filename, which is an debug log taken with "GST_DEBUG_NO_COLOR=1 GST_DEBUG=XXX <application>"'
236 in_filename = args[0]
237 out_filename = options.output
240 for syscall in parse_strace(in_filename):
241 syscalls.append(syscall)
242 if isinstance(syscall, FirstMark):
244 elif isinstance(syscall, LastMark):
248 print 'No logs in %s' % in_filename
251 normalize_timestamps(syscalls)
252 metrics = compute_syscall_metrics(syscalls)
254 surface = plot_syscalls_to_surface(syscalls, metrics)
255 surface.write_to_png(out_filename)
259 if __name__ == "__main__":
260 sys.exit(main(sys.argv))