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314 lines
8.6 KiB
Python
Executable file
314 lines
8.6 KiB
Python
Executable file
#!/usr/bin/env python
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#
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# based on plot-timeline.py by Federico Mena-Quintero <federico at ximian dotcom>
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# example:
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# GST_DEBUG_COLOR_MODE=off GST_DEBUG="*:3" gst-launch-1.0 2>debug.log audiotestsrc num-buffers=10 ! audioconvert ! alsasink
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# gst-plot-timeline.py debug.log --output=debug.png
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import math
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import optparse
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import os
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import re
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import sys
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import cairo
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FONT_NAME = "Bitstream Vera Sans"
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FONT_SIZE = 8
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# how many pixels for a second on the timeline
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PIXELS_PER_SECOND = 300
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# how many pixels for one line of log
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PIXELS_PER_LINE = 10
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PLOT_WIDTH = 1400
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TIME_SCALE_WIDTH = 20
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SYSCALL_MARKER_WIDTH = 20
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LOG_TEXT_XPOS = 400
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LOG_MARKER_WIDTH = 20
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BACKGROUND_COLOR = (0, 0, 0)
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# assumes GST_DEBUG_LOG_COLOR=1
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# timestamp pid thread level category,file,line,msg
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mark_regex = re.compile (r'^(\d+:\d+:\d+\.\d+) +\d+ +0?x?[0-9a-f]+ [A-Z]+ +([-a-zA-Z0-9_]+ )(.*)')
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mark_timestamp_group = 1
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mark_program_group = 2
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mark_log_group = 3
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success_result = "0"
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skip_lines = 0
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max_lines = 500
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filter_regex = re.compile ('')
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skip_regex = re.compile('')
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class BaseMark:
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colors = 0, 0, 0
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def __init__(self, timestamp, log):
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self.timestamp = timestamp
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self.log = log
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self.timestamp_ypos = 0
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self.log_ypos = 0
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class AccessMark(BaseMark):
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pass
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class LastMark(BaseMark):
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colors = 1.0, 0, 0
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class FirstMark(BaseMark):
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colors = 1.0, 0, 0
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class ExecMark(BaseMark):
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# colors = 0.75, 0.33, 0.33
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colors = (1.0, 0.0, 0.0)
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def __init__(self, timestamp, log):
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BaseMark.__init__(self, timestamp,
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'execve: ' + os.path.basename(log))
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class Metrics:
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def __init__(self):
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self.width = 0
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self.height = 0
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# don't use black or red
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palette = [
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(0.12, 0.29, 0.49),
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(0.36, 0.51, 0.71),
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(0.75, 0.31, 0.30),
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(0.62, 0.73, 0.38),
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(0.50, 0.40, 0.63),
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(0.29, 0.67, 0.78),
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(0.96, 0.62, 0.34)
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]
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class SyscallParser:
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def __init__ (self):
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self.syscalls = []
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def add_line (self, str):
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m = mark_regex.search (str)
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if m:
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timestr = m.group (mark_timestamp_group).split(':')
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timestamp = float (timestr[2]) + (float (timestr[1]) * 60.0) + (float (timestr[0]) * 3600.0)
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program = m.group (mark_program_group)
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text = program + m.group (mark_log_group)
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if text == 'last':
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self.syscalls.append (LastMark (timestamp, text))
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elif text == 'first':
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self.syscalls.append (FirstMark (timestamp, text))
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else:
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s = AccessMark (timestamp, text)
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program_hash = program.__hash__ ()
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s.colors = palette[program_hash % len (palette)]
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self.syscalls.append (s)
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else:
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print 'No log in %s' % str
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return
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def parse_strace(filename):
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parser = SyscallParser ()
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global skip_lines
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global max_lines
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global skip_regex
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skip_found = False
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for line in file(filename, "r").readlines():
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if line == "":
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break
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if not skip_found:
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if skip_regex.search(line):
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skip_found = True
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else:
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continue
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if skip_lines > 0:
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skip_lines -= 1
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continue
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if len(parser.syscalls) >= max_lines:
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break
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if filter_regex.search(line):
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parser.add_line (line)
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return parser.syscalls
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def normalize_timestamps(syscalls):
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first_timestamp = syscalls[0].timestamp
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for syscall in syscalls:
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syscall.timestamp -= first_timestamp
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def compute_syscall_metrics(syscalls):
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global PIXELS_PER_SECOND
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global PIXELS_PER_LINE
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num_syscalls = len(syscalls)
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metrics = Metrics()
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metrics.width = PLOT_WIDTH
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last_timestamp = syscalls[num_syscalls - 1].timestamp
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time_height = int(math.ceil(last_timestamp * PIXELS_PER_SECOND))
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line_height = num_syscalls * PIXELS_PER_LINE
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if time_height > line_height:
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metrics.height = time_height
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print "Adjusting PIXELS_PER_LINE = %d" % PIXELS_PER_LINE
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PIXELS_PER_LINE = metrics.height / num_syscalls
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print " PIXELS_PER_LINE = %d" % PIXELS_PER_LINE
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else:
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metrics.height = line_height
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print "Adjusting PIXELS_PER_SECOND %d" % PIXELS_PER_SECOND
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PIXELS_PER_SECOND = int(math.ceil(metrics.height / last_timestamp))
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print " PIXELS_PER_SECOND %d" % PIXELS_PER_SECOND
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text_ypos = 0
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for syscall in syscalls:
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syscall.timestamp_ypos = syscall.timestamp * PIXELS_PER_SECOND
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syscall.log_ypos = text_ypos + FONT_SIZE
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text_ypos += PIXELS_PER_LINE
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return metrics
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def plot_time_scale(surface, ctx, metrics):
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num_seconds = (metrics.height + PIXELS_PER_SECOND - 1) / PIXELS_PER_SECOND
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ctx.set_source_rgb(0.5, 0.5, 0.5)
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ctx.set_line_width(1.0)
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for i in range(num_seconds):
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ypos = i * PIXELS_PER_SECOND
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ctx.move_to(0, ypos + 0.5)
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ctx.line_to(TIME_SCALE_WIDTH, ypos + 0.5)
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ctx.stroke()
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ctx.move_to(0, ypos + 2 + FONT_SIZE)
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ctx.show_text("%d s" % i)
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def plot_syscall(surface, ctx, syscall):
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ctx.set_source_rgb(*syscall.colors)
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# Line
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ctx.move_to(TIME_SCALE_WIDTH, syscall.timestamp_ypos)
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ctx.line_to(TIME_SCALE_WIDTH + SYSCALL_MARKER_WIDTH, syscall.timestamp_ypos)
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ctx.line_to(LOG_TEXT_XPOS - LOG_MARKER_WIDTH, syscall.log_ypos - FONT_SIZE / 2 + 0.5)
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ctx.line_to(LOG_TEXT_XPOS, syscall.log_ypos - FONT_SIZE / 2 + 0.5)
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ctx.stroke()
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# Log text
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ctx.move_to(LOG_TEXT_XPOS, syscall.log_ypos)
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ctx.show_text("%8.5f: %s" % (syscall.timestamp, syscall.log))
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def plot_syscalls_to_surface(syscalls, metrics):
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num_syscalls = len(syscalls)
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print 'picture size: %d x %d' % (metrics.width, metrics.height);
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surface = cairo.ImageSurface(cairo.FORMAT_RGB24,
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metrics.width, metrics.height)
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ctx = cairo.Context(surface)
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ctx.select_font_face(FONT_NAME)
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ctx.set_font_size(FONT_SIZE)
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# Background
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ctx.set_source_rgb (*BACKGROUND_COLOR)
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ctx.rectangle(0, 0, metrics.width, metrics.height)
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ctx.fill()
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# Time scale
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plot_time_scale(surface, ctx, metrics)
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# Contents
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ctx.set_line_width(1.0)
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for syscall in syscalls:
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plot_syscall(surface, ctx, syscall)
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return surface
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def main(args):
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global skip_lines
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global max_lines
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global filter_regex
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global skip_regex
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option_parser = optparse.OptionParser(
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usage="usage: %prog -o output.png <debug.log>")
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option_parser.add_option("-o",
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"--output", dest="output",
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metavar="FILE",
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help="Name of output file (output is a PNG file)")
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option_parser.add_option("-s",
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"--skip", dest="skip",
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metavar="LINES",
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help="Skip a number of loglines at the beginning of the file or wait till a regular expression happens")
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option_parser.add_option("-m",
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"--max-lines", dest="max",
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help="max lines that need to be plotted")
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option_parser.add_option("-f",
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"--filter", dest="filter",
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help="filter the log lines on a regular expression")
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options, args = option_parser.parse_args()
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if not options.output:
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print 'Please specify an output filename with "-o file.png" or "--output=file.png".'
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return 1
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if len(args) != 1:
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print 'Please specify only one input filename, which is an debug log taken with "GST_DEBUG_COLOR_MODE=off GST_DEBUG=XXX <application>"'
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return 1
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in_filename = args[0]
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out_filename = options.output
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if options.skip:
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try:
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skip_lines = int(options.skip)
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except:
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skip_regex = re.compile(options.skip)
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skip_lines = 0
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if options.max:
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max_lines = int(options.max)
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if options.filter:
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filter_regex = re.compile(options.filter)
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syscalls = []
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for syscall in parse_strace(in_filename):
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syscalls.append(syscall)
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if isinstance(syscall, FirstMark):
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syscalls = []
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elif isinstance(syscall, LastMark):
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break
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if not syscalls:
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print 'No logs in %s' % in_filename
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return 1
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normalize_timestamps(syscalls)
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metrics = compute_syscall_metrics(syscalls)
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surface = plot_syscalls_to_surface(syscalls, metrics)
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surface.write_to_png(out_filename)
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return 0
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if __name__ == "__main__":
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sys.exit(main(sys.argv))
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