463 lines
13 KiB
Python
463 lines
13 KiB
Python
#!/usr/bin/python3
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import re
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import cairo
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from io import open
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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', encoding='utf-8')
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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 __bool__(self):
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return self.line != ""
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__nonzero__ = __bool__
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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(r'(.*) \(0x.*?\) (.*)', 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.all_events = []
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self.workwait_events = []
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self.memory_events = []
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self.other_events = []
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Thread.thread_number += 1
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all_events = []
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class Event:
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def __init__(self, thread, gate_location, gate_name, start, stop):
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self.thread = thread
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self.gate_location = gate_location
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self.gate_name = gate_name
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self.work = False
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self.wait = False
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self.memory = False
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if gate_location == "memory":
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self.memory = True
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elif re.match('.*work.*', gate_name):
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self.work = True
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elif re.match('.*wait.*', gate_name):
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self.wait = True
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if self.memory:
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self.start = start
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self.stop = start
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self.size = stop
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else:
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self.start = start
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self.stop = stop
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thread.all_events.append(self)
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all_events.append(self)
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if self.wait or self.work:
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thread.workwait_events.append(self)
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elif self.memory:
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thread.memory_events.append(self)
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else:
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thread.other_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_location = match.group(1)
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gate_name = match.group(3)
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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_location, gate_name, a, b)
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n_events += 1
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for thread in threads:
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thread.all_events.sort(key=lambda x: x.start)
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thread.workwait_events.sort(key=lambda x: x.start)
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thread.memory_events.sort(key=lambda x: x.start)
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thread.other_events.sort(key=lambda x: x.start)
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all_events.sort(key=lambda x: x.start)
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print(f'loaded {n_events} events')
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# move time axis to secs of computation
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ticks_per_sec = 1000000.0
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first_time = all_events[0].start
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last_time = 0
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for event in all_events:
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if event.start < first_time:
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first_time = event.start
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if event.stop > last_time:
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last_time = event.stop
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for event in all_events:
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event.start = (event.start - first_time) / ticks_per_sec
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event.stop = (event.stop - first_time) / ticks_per_sec
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last_time = (last_time - first_time) / ticks_per_sec
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first_time = 0
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print(f'total 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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thread.mem = 0
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thread.peak_mem = 0
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for event in thread.all_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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if event.memory:
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thread.mem += event.size
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if thread.mem > thread.peak_mem:
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thread.peak_mem = thread.mem
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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 alive wait% work% unkn% mem peakm')
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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((f'{thread.thread_name:>13}\t{thread.alive:6.2f}\t'
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f'{wait_percent:>4.1f}\t{work_percent:>4.1f}\t{unkn_percent:>4.1f}\t'
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f'{thread.mem / (1024 * 1024):>4.1f}\t'
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f'{thread.peak_mem / (1024 * 1024):>4.1f}'))
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mem = 0
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peak_mem = 0
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for event in all_events:
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if event.memory:
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mem += event.size
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if mem > peak_mem:
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peak_mem = mem
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print(f'peak memory = {peak_mem / (1024 * 1024):.1f} MB')
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if mem != 0:
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print(f'leak! final memory = {mem / (1024 * 1024):.1f} MB')
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# does a list of events contain an overlap?
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# assume the list of events has been sorted by start time
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def events_overlap(events):
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for i in range(0, len(events) - 1):
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# we can't just test for stop1 > start2 since one (or both) events
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# might have duration zero
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event1 = events[i]
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event2 = events[i + 1]
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overlap_start = max(event1.start, event2.start)
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overlap_stop = min(event1.stop, event2.stop)
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if overlap_stop - overlap_start > 0:
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return True
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return False
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# do the events on two gates overlap?
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def gates_overlap(events, gate_name1, gate_name2):
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merged = []
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for event in events:
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if event.gate_name == gate_name1 or event.gate_name == gate_name2:
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merged.append(event)
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merged.sort(key=lambda x: x.start)
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return events_overlap(merged)
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# show top 10 waits
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wait = {}
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for thread in threads:
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for event in thread.all_events:
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if event.wait:
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name = f'{event.gate_location}::{event.gate_name}'
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if name not in wait:
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wait[name] = 0
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wait[name] += event.stop - event.start
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print('name wait')
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for [name, time] in sorted(wait.items(), reverse=True, key=lambda x: x[1])[:10]:
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print(f'{name:>35}\t{time:.2f}')
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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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gate_positions = {}
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# first pass .. move work and wait events to y == 0
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if events_overlap(thread.workwait_events):
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print('gate overlap on thread', thread.thread_name)
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for i in range(0, len(thread.workwait_events) - 1):
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event1 = thread.workwait_events[i]
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event2 = thread.workwait_events[i + 1]
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overlap_start = max(event1.start, event2.start)
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overlap_stop = min(event1.stop, event2.stop)
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if overlap_stop - overlap_start > 0:
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print('overlap:')
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print('event', event1.gate_location, event1.gate_name, end=' ')
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print('starts at', event1.start, 'stops at', event1.stop)
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print('event', event2.gate_location, event2.gate_name, end=' ')
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print('starts at', event2.start, 'stops at', event2.stop)
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for event in thread.workwait_events:
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gate_positions[event.gate_name] = 0
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event.y = 0
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event.total_y = total_y
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for event in thread.memory_events:
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gate_positions[event.gate_name] = 0
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event.y = 0
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event.total_y = total_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.other_events:
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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 gates_overlap(thread.other_events,
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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.other_events:
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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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MEM_HEIGHT = 100
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WIDTH = int(LEFT_BORDER + last_time * PIXELS_PER_SECOND) + 20
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HEIGHT = int(total_y * PIXELS_PER_GATE) + MEM_HEIGHT + 30
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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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if event.memory:
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width = 1
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height /= 2
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top += 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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elif event.memory:
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ctx.set_source_rgb(1.0, 1.0, 1.0)
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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 and not event.memory:
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xbearing, ybearing, twidth, theight, xadvance, yadvance = \
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ctx.text_extents(event.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.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.all_events:
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draw_event(ctx, event)
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memory_y = total_y * PIXELS_PER_GATE
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label = "memory"
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xbearing, ybearing, twidth, theight, xadvance, yadvance = \
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ctx.text_extents(label)
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ctx.move_to(0, memory_y + theight + 8)
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ctx.set_source_rgb(1.00, 1.00, 1.00)
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ctx.show_text(label)
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mem = 0
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ctx.move_to(LEFT_BORDER, memory_y + MEM_HEIGHT)
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for event in all_events:
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if event.memory:
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mem += event.size
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left = LEFT_BORDER + event.start * PIXELS_PER_SECOND
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top = memory_y + MEM_HEIGHT - (MEM_HEIGHT * mem / peak_mem)
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ctx.line_to(left, top)
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ctx.set_line_width(1)
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ctx.set_source_rgb(1.00, 1.00, 1.00)
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ctx.stroke()
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axis_y = total_y * PIXELS_PER_GATE + MEM_HEIGHT
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ctx.rectangle(LEFT_BORDER, axis_y, last_time * PIXELS_PER_SECOND, 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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label = "time"
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xbearing, ybearing, twidth, theight, xadvance, yadvance = \
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ctx.text_extents(label)
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ctx.move_to(0, axis_y + theight + 8)
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ctx.set_source_rgb(1.00, 1.00, 1.00)
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ctx.show_text(label)
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for t in range(0, int(last_time * PIXELS_PER_SECOND), PIXELS_PER_SECOND // 10):
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left = t + LEFT_BORDER
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top = axis_y
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ctx.rectangle(left, top, 1, 5)
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ctx.set_source_rgb(1.00, 1.00, 1.00)
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ctx.fill()
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label = str(t / PIXELS_PER_SECOND)
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xbearing, ybearing, twidth, theight, xadvance, yadvance = \
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ctx.text_extents(label)
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ctx.move_to(left - twidth // 2, top + theight + 8)
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ctx.set_source_rgb(1.00, 1.00, 1.00)
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ctx.show_text(label)
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surface.finish()
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