#!/usr/bin/python
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#
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# Cpu task migration overview toy
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#
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# Copyright (C) 2010 Frederic Weisbecker <fweisbec@gmail.com>
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#
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# perf script event handlers have been generated by perf script -g python
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#
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# This software is distributed under the terms of the GNU General
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# Public License ("GPL") version 2 as published by the Free Software
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# Foundation.
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from __future__ import print_function
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import os
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import sys
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from collections import defaultdict
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try:
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from UserList import UserList
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except ImportError:
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# Python 3: UserList moved to the collections package
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from collections import UserList
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sys.path.append(os.environ['PERF_EXEC_PATH'] + \
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'/scripts/python/Perf-Trace-Util/lib/Perf/Trace')
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sys.path.append('scripts/python/Perf-Trace-Util/lib/Perf/Trace')
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from perf_trace_context import *
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from Core import *
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from SchedGui import *
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threads = { 0 : "idle"}
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def thread_name(pid):
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return "%s:%d" % (threads[pid], pid)
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class RunqueueEventUnknown:
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@staticmethod
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def color():
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return None
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def __repr__(self):
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return "unknown"
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class RunqueueEventSleep:
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@staticmethod
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def color():
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return (0, 0, 0xff)
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def __init__(self, sleeper):
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self.sleeper = sleeper
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def __repr__(self):
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return "%s gone to sleep" % thread_name(self.sleeper)
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class RunqueueEventWakeup:
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@staticmethod
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def color():
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return (0xff, 0xff, 0)
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def __init__(self, wakee):
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self.wakee = wakee
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def __repr__(self):
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return "%s woke up" % thread_name(self.wakee)
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class RunqueueEventFork:
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@staticmethod
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def color():
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return (0, 0xff, 0)
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def __init__(self, child):
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self.child = child
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def __repr__(self):
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return "new forked task %s" % thread_name(self.child)
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class RunqueueMigrateIn:
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@staticmethod
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def color():
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return (0, 0xf0, 0xff)
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def __init__(self, new):
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self.new = new
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def __repr__(self):
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return "task migrated in %s" % thread_name(self.new)
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class RunqueueMigrateOut:
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@staticmethod
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def color():
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return (0xff, 0, 0xff)
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def __init__(self, old):
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self.old = old
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def __repr__(self):
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return "task migrated out %s" % thread_name(self.old)
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class RunqueueSnapshot:
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def __init__(self, tasks = [0], event = RunqueueEventUnknown()):
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self.tasks = tuple(tasks)
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self.event = event
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def sched_switch(self, prev, prev_state, next):
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event = RunqueueEventUnknown()
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if taskState(prev_state) == "R" and next in self.tasks \
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and prev in self.tasks:
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return self
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if taskState(prev_state) != "R":
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event = RunqueueEventSleep(prev)
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next_tasks = list(self.tasks[:])
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if prev in self.tasks:
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if taskState(prev_state) != "R":
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next_tasks.remove(prev)
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elif taskState(prev_state) == "R":
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next_tasks.append(prev)
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if next not in next_tasks:
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next_tasks.append(next)
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return RunqueueSnapshot(next_tasks, event)
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def migrate_out(self, old):
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if old not in self.tasks:
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return self
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next_tasks = [task for task in self.tasks if task != old]
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return RunqueueSnapshot(next_tasks, RunqueueMigrateOut(old))
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def __migrate_in(self, new, event):
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if new in self.tasks:
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self.event = event
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return self
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next_tasks = self.tasks[:] + tuple([new])
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return RunqueueSnapshot(next_tasks, event)
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def migrate_in(self, new):
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return self.__migrate_in(new, RunqueueMigrateIn(new))
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def wake_up(self, new):
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return self.__migrate_in(new, RunqueueEventWakeup(new))
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def wake_up_new(self, new):
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return self.__migrate_in(new, RunqueueEventFork(new))
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def load(self):
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""" Provide the number of tasks on the runqueue.
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Don't count idle"""
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return len(self.tasks) - 1
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def __repr__(self):
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ret = self.tasks.__repr__()
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ret += self.origin_tostring()
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return ret
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class TimeSlice:
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def __init__(self, start, prev):
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self.start = start
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self.prev = prev
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self.end = start
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# cpus that triggered the event
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self.event_cpus = []
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if prev is not None:
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self.total_load = prev.total_load
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self.rqs = prev.rqs.copy()
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else:
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self.rqs = defaultdict(RunqueueSnapshot)
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self.total_load = 0
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def __update_total_load(self, old_rq, new_rq):
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diff = new_rq.load() - old_rq.load()
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self.total_load += diff
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def sched_switch(self, ts_list, prev, prev_state, next, cpu):
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old_rq = self.prev.rqs[cpu]
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new_rq = old_rq.sched_switch(prev, prev_state, next)
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if old_rq is new_rq:
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return
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self.rqs[cpu] = new_rq
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self.__update_total_load(old_rq, new_rq)
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ts_list.append(self)
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self.event_cpus = [cpu]
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def migrate(self, ts_list, new, old_cpu, new_cpu):
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if old_cpu == new_cpu:
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return
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old_rq = self.prev.rqs[old_cpu]
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out_rq = old_rq.migrate_out(new)
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self.rqs[old_cpu] = out_rq
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self.__update_total_load(old_rq, out_rq)
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new_rq = self.prev.rqs[new_cpu]
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in_rq = new_rq.migrate_in(new)
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self.rqs[new_cpu] = in_rq
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self.__update_total_load(new_rq, in_rq)
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ts_list.append(self)
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if old_rq is not out_rq:
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self.event_cpus.append(old_cpu)
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self.event_cpus.append(new_cpu)
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def wake_up(self, ts_list, pid, cpu, fork):
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old_rq = self.prev.rqs[cpu]
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if fork:
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new_rq = old_rq.wake_up_new(pid)
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else:
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new_rq = old_rq.wake_up(pid)
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if new_rq is old_rq:
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return
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self.rqs[cpu] = new_rq
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self.__update_total_load(old_rq, new_rq)
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ts_list.append(self)
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self.event_cpus = [cpu]
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def next(self, t):
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self.end = t
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return TimeSlice(t, self)
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class TimeSliceList(UserList):
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def __init__(self, arg = []):
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self.data = arg
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def get_time_slice(self, ts):
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if len(self.data) == 0:
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slice = TimeSlice(ts, TimeSlice(-1, None))
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else:
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slice = self.data[-1].next(ts)
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return slice
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def find_time_slice(self, ts):
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start = 0
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end = len(self.data)
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found = -1
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searching = True
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while searching:
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if start == end or start == end - 1:
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searching = False
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i = (end + start) / 2
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if self.data[i].start <= ts and self.data[i].end >= ts:
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found = i
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end = i
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continue
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if self.data[i].end < ts:
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start = i
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elif self.data[i].start > ts:
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end = i
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return found
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def set_root_win(self, win):
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self.root_win = win
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def mouse_down(self, cpu, t):
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idx = self.find_time_slice(t)
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if idx == -1:
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return
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ts = self[idx]
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rq = ts.rqs[cpu]
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raw = "CPU: %d\n" % cpu
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raw += "Last event : %s\n" % rq.event.__repr__()
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raw += "Timestamp : %d.%06d\n" % (ts.start / (10 ** 9), (ts.start % (10 ** 9)) / 1000)
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raw += "Duration : %6d us\n" % ((ts.end - ts.start) / (10 ** 6))
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raw += "Load = %d\n" % rq.load()
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for t in rq.tasks:
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raw += "%s \n" % thread_name(t)
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self.root_win.update_summary(raw)
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def update_rectangle_cpu(self, slice, cpu):
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rq = slice.rqs[cpu]
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if slice.total_load != 0:
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load_rate = rq.load() / float(slice.total_load)
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else:
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load_rate = 0
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red_power = int(0xff - (0xff * load_rate))
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color = (0xff, red_power, red_power)
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top_color = None
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if cpu in slice.event_cpus:
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top_color = rq.event.color()
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self.root_win.paint_rectangle_zone(cpu, color, top_color, slice.start, slice.end)
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def fill_zone(self, start, end):
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i = self.find_time_slice(start)
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if i == -1:
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return
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for i in range(i, len(self.data)):
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timeslice = self.data[i]
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if timeslice.start > end:
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return
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for cpu in timeslice.rqs:
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self.update_rectangle_cpu(timeslice, cpu)
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def interval(self):
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if len(self.data) == 0:
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return (0, 0)
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return (self.data[0].start, self.data[-1].end)
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def nr_rectangles(self):
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last_ts = self.data[-1]
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max_cpu = 0
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for cpu in last_ts.rqs:
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if cpu > max_cpu:
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max_cpu = cpu
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return max_cpu
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class SchedEventProxy:
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def __init__(self):
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self.current_tsk = defaultdict(lambda : -1)
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self.timeslices = TimeSliceList()
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def sched_switch(self, headers, prev_comm, prev_pid, prev_prio, prev_state,
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next_comm, next_pid, next_prio):
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""" Ensure the task we sched out this cpu is really the one
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we logged. Otherwise we may have missed traces """
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on_cpu_task = self.current_tsk[headers.cpu]
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if on_cpu_task != -1 and on_cpu_task != prev_pid:
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print("Sched switch event rejected ts: %s cpu: %d prev: %s(%d) next: %s(%d)" % \
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headers.ts_format(), headers.cpu, prev_comm, prev_pid, next_comm, next_pid)
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threads[prev_pid] = prev_comm
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threads[next_pid] = next_comm
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self.current_tsk[headers.cpu] = next_pid
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ts = self.timeslices.get_time_slice(headers.ts())
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ts.sched_switch(self.timeslices, prev_pid, prev_state, next_pid, headers.cpu)
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def migrate(self, headers, pid, prio, orig_cpu, dest_cpu):
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ts = self.timeslices.get_time_slice(headers.ts())
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ts.migrate(self.timeslices, pid, orig_cpu, dest_cpu)
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def wake_up(self, headers, comm, pid, success, target_cpu, fork):
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if success == 0:
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return
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ts = self.timeslices.get_time_slice(headers.ts())
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ts.wake_up(self.timeslices, pid, target_cpu, fork)
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def trace_begin():
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global parser
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parser = SchedEventProxy()
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def trace_end():
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app = wx.App(False)
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timeslices = parser.timeslices
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frame = RootFrame(timeslices, "Migration")
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app.MainLoop()
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def sched__sched_stat_runtime(event_name, context, common_cpu,
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common_secs, common_nsecs, common_pid, common_comm,
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common_callchain, comm, pid, runtime, vruntime):
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pass
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def sched__sched_stat_iowait(event_name, context, common_cpu,
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common_secs, common_nsecs, common_pid, common_comm,
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common_callchain, comm, pid, delay):
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pass
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def sched__sched_stat_sleep(event_name, context, common_cpu,
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common_secs, common_nsecs, common_pid, common_comm,
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common_callchain, comm, pid, delay):
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pass
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def sched__sched_stat_wait(event_name, context, common_cpu,
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common_secs, common_nsecs, common_pid, common_comm,
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common_callchain, comm, pid, delay):
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pass
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def sched__sched_process_fork(event_name, context, common_cpu,
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common_secs, common_nsecs, common_pid, common_comm,
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common_callchain, parent_comm, parent_pid, child_comm, child_pid):
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pass
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def sched__sched_process_wait(event_name, context, common_cpu,
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common_secs, common_nsecs, common_pid, common_comm,
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common_callchain, comm, pid, prio):
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pass
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def sched__sched_process_exit(event_name, context, common_cpu,
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common_secs, common_nsecs, common_pid, common_comm,
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common_callchain, comm, pid, prio):
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pass
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def sched__sched_process_free(event_name, context, common_cpu,
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common_secs, common_nsecs, common_pid, common_comm,
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common_callchain, comm, pid, prio):
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pass
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def sched__sched_migrate_task(event_name, context, common_cpu,
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common_secs, common_nsecs, common_pid, common_comm,
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common_callchain, comm, pid, prio, orig_cpu,
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dest_cpu):
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headers = EventHeaders(common_cpu, common_secs, common_nsecs,
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common_pid, common_comm, common_callchain)
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parser.migrate(headers, pid, prio, orig_cpu, dest_cpu)
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def sched__sched_switch(event_name, context, common_cpu,
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common_secs, common_nsecs, common_pid, common_comm, common_callchain,
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prev_comm, prev_pid, prev_prio, prev_state,
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next_comm, next_pid, next_prio):
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headers = EventHeaders(common_cpu, common_secs, common_nsecs,
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common_pid, common_comm, common_callchain)
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parser.sched_switch(headers, prev_comm, prev_pid, prev_prio, prev_state,
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next_comm, next_pid, next_prio)
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def sched__sched_wakeup_new(event_name, context, common_cpu,
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common_secs, common_nsecs, common_pid, common_comm,
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common_callchain, comm, pid, prio, success,
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target_cpu):
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headers = EventHeaders(common_cpu, common_secs, common_nsecs,
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common_pid, common_comm, common_callchain)
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parser.wake_up(headers, comm, pid, success, target_cpu, 1)
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def sched__sched_wakeup(event_name, context, common_cpu,
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common_secs, common_nsecs, common_pid, common_comm,
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common_callchain, comm, pid, prio, success,
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target_cpu):
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headers = EventHeaders(common_cpu, common_secs, common_nsecs,
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common_pid, common_comm, common_callchain)
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parser.wake_up(headers, comm, pid, success, target_cpu, 0)
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def sched__sched_wait_task(event_name, context, common_cpu,
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common_secs, common_nsecs, common_pid, common_comm,
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common_callchain, comm, pid, prio):
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pass
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def sched__sched_kthread_stop_ret(event_name, context, common_cpu,
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common_secs, common_nsecs, common_pid, common_comm,
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common_callchain, ret):
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pass
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def sched__sched_kthread_stop(event_name, context, common_cpu,
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common_secs, common_nsecs, common_pid, common_comm,
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common_callchain, comm, pid):
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pass
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def trace_unhandled(event_name, context, event_fields_dict):
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pass
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