326 lines
9.0 KiB
Python
Executable File
326 lines
9.0 KiB
Python
Executable File
#!/usr/bin/python
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import re
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import math
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import cairo
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class ReadFile:
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def __init__(self, filename):
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self.filename = filename
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def __enter__(self):
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self.f = open(self.filename, 'r')
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self.lineno = 0
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self.getnext();
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return self
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def __exit__(self, type, value, traceback):
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self.f.close()
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def __nonzero__(self):
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return self.line != ""
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def getnext(self):
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self.lineno += 1
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self.line = self.f.readline()
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def read_times(rf):
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times = []
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while True:
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match = re.match('[0-9]+ ', rf.line)
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if not match:
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break
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times += [int(x) for x in re.split(' ', rf.line.rstrip())]
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rf.getnext()
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return times[::-1]
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class Thread:
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thread_number = 0
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def __init__(self, thread_name):
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# no one cares about the thread address
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match = re.match('(.*) \(0x.*?\) (.*)', thread_name)
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if match:
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thread_name = match.group(1) + " " + match.group(2)
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self.thread_name = thread_name
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self.thread_number = Thread.thread_number
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self.events = []
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Thread.thread_number += 1
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class Event:
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def __init__(self, thread, gate_name, start, stop):
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self.thread = thread
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self.gate_name = gate_name
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match = re.match('(.*?): (.*)', gate_name)
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if match:
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self.short_gate_name = match.group(2)
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self.start = start
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self.stop = stop
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self.work = False
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self.wait = False
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if re.match('.*work.*', gate_name):
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self.work = True
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if re.match('.*wait.*', gate_name):
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self.wait = True
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thread.events.append(self)
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input_filename = 'vips-profile.txt'
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thread_id = 0
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threads = []
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n_events = 0
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print 'reading from', input_filename
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with ReadFile(input_filename) as rf:
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while rf:
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if rf.line.rstrip() == "":
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rf.getnext()
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continue
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if rf.line[0] == "#":
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rf.getnext()
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continue
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match = re.match('thread: (.*)', rf.line)
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if not match:
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print 'parse error line %d, expected "thread"' % rf.lineno
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thread_name = match.group(1) + " " + str(thread_id)
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thread_id += 1
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thread = Thread(thread_name)
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threads.append(thread)
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rf.getnext()
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while True:
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match = re.match('gate: (.*)', rf.line)
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if not match:
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break
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gate_name = match.group(1)
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rf.getnext()
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match = re.match('start:', rf.line)
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if not match:
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continue
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rf.getnext()
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start = read_times(rf)
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match = re.match('stop:', rf.line)
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if not match:
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continue
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rf.getnext()
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stop = read_times(rf)
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if len(start) != len(stop):
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print 'start and stop length mismatch'
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for a, b in zip(start, stop):
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Event(thread, gate_name, a, b)
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n_events += 1
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for thread in threads:
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thread.events.sort(lambda x, y: cmp(x.start, y.start))
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print 'loaded %d events' % n_events
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# normalise time axis to secs of computation
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ticks_per_sec = 1000000.0
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start_time = threads[0].events[0].start
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last_time = 0
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for thread in threads:
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for event in thread.events:
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event.start = (event.start - start_time) / ticks_per_sec
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event.stop = (event.stop - start_time) / ticks_per_sec
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if event.stop > last_time:
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last_time = event.stop
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print 'last time =', last_time
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# calculate some simple stats
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for thread in threads:
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thread.start = last_time
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thread.stop = 0
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thread.wait = 0
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thread.work = 0
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for event in thread.events:
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if event.start < thread.start:
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thread.start = event.start
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if event.stop > thread.stop:
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thread.stop = event.stop
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if event.wait:
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thread.wait += event.stop - event.start
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if event.work:
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thread.work += event.stop - event.start
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thread.alive = thread.stop - thread.start
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# hide very short-lived threads
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thread.hide = thread.alive < 0.01
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print 'name\t\talive\twait%\twork%\tunknown%'
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for thread in threads:
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if thread.hide:
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continue
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wait_percent = 100 * thread.wait / thread.alive
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work_percent = 100 * thread.work / thread.alive
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unkn_percent = 100 - 100 * (thread.work + thread.wait) / thread.alive
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print '%13s\t%6.2g\t' % (thread.thread_name, thread.alive),
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print '%.3g\t%.3g\t%.3g' % (wait_percent, work_percent, unkn_percent)
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# do two gates overlap?
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def is_overlap(events, gate_name1, gate_name2):
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for event1 in events:
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if event1.gate_name != gate_name1:
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continue
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for event2 in events:
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if event2.gate_name != gate_name2:
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continue
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# if either endpoint of 1 is within 2
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if event1.start > event2.start and event1.stop < event2.stop:
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return True
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if event1.stop > event2.start and event1.stop < event2.stop:
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return True
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return False
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# allocate a y position for each gate
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total_y = 0
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for thread in threads:
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if thread.hide:
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continue
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thread.total_y = total_y
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# first pass .. move work and wait events to y == 0
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gate_positions = {}
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for event in thread.events:
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if not event.work and not event.wait:
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continue
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# no works and waits must overlap
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if not event.gate_name in gate_positions:
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for gate_name in gate_positions:
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if is_overlap(thread.events, event.gate_name, gate_name):
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print 'gate overlap on thread', thread.thread_name
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print '\t', event.gate_name
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print '\t', gate_name
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break
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gate_positions[event.gate_name] = 0
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event.y = gate_positions[event.gate_name]
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event.total_y = total_y + event.y
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# second pass: move all other events to non-overlapping ys
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y = 1
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for event in thread.events:
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if event.work or event.wait:
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continue
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if not event.gate_name in gate_positions:
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# look at all the ys we've allocated previously and see if we can
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# add this gate to one of them
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for gate_y in range(1, y):
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found_overlap = False
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for gate_name in gate_positions:
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if gate_positions[gate_name] != gate_y:
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continue
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if is_overlap(thread.events, event.gate_name, gate_name):
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found_overlap = True
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break
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if not found_overlap:
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gate_positions[event.gate_name] = gate_y
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break
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# failure? add a new y
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if not event.gate_name in gate_positions:
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gate_positions[event.gate_name] = y
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y += 1
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event.y = gate_positions[event.gate_name]
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# third pass: flip the order of the ys to get the lowest-level ones at the
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# top, next to the wait/work line
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for event in thread.events:
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if event.work or event.wait:
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continue
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event.y = y - event.y
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event.total_y = total_y + event.y
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total_y += y
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PIXELS_PER_SECOND = 1000
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PIXELS_PER_GATE = 20
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LEFT_BORDER = 130
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BAR_HEIGHT = 5
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WIDTH = int(LEFT_BORDER + last_time * PIXELS_PER_SECOND) + 20
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HEIGHT = int((total_y + 1) * PIXELS_PER_GATE)
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output_filename = "vips-profile.svg"
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print 'writing to', output_filename
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surface = cairo.SVGSurface(output_filename, WIDTH, HEIGHT)
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ctx = cairo.Context(surface)
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ctx.select_font_face('Sans')
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ctx.set_font_size(15)
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ctx.rectangle(0, 0, WIDTH, HEIGHT)
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ctx.set_source_rgba(0.0, 0.0, 0.3, 1.0)
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ctx.fill()
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def draw_event(ctx, event):
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left = event.start * PIXELS_PER_SECOND + LEFT_BORDER
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top = event.total_y * PIXELS_PER_GATE + BAR_HEIGHT / 2
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width = (event.stop - event.start) * PIXELS_PER_SECOND
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height = BAR_HEIGHT
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ctx.rectangle(left, top, width, height)
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if event.wait:
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ctx.set_source_rgb(0.9, 0.1, 0.1)
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elif event.work:
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ctx.set_source_rgb(0.1, 0.9, 0.1)
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else:
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ctx.set_source_rgb(0.1, 0.1, 0.9)
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ctx.fill()
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if not event.wait and not event.work:
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xbearing, ybearing, twidth, theight, xadvance, yadvance = \
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ctx.text_extents(event.short_gate_name)
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ctx.move_to(left + width / 2 - twidth / 2, top + 3 * BAR_HEIGHT)
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ctx.set_source_rgb(1.00, 0.83, 0.00)
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ctx.show_text(event.short_gate_name)
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for thread in threads:
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if thread.hide:
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continue
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ctx.rectangle(0, thread.total_y * PIXELS_PER_GATE, WIDTH, 1)
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ctx.set_source_rgb(1.00, 1.00, 1.00)
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ctx.fill()
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xbearing, ybearing, twidth, theight, xadvance, yadvance = \
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ctx.text_extents(thread.thread_name)
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ctx.move_to(0, theight + thread.total_y * PIXELS_PER_GATE + BAR_HEIGHT / 2)
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ctx.set_source_rgb(1.00, 1.00, 1.00)
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ctx.show_text(thread.thread_name)
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for event in thread.events:
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draw_event(ctx, event)
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surface.finish()
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