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#!/usr/bin/env python
# SPDX-License-Identifier: Apache-2.0
#
# Copyright (C) 2017, ARM Limited, Google, and contributors.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
from collections import namedtuple
import trappy
import argparse
EventData = namedtuple('EventData', ['time', 'event', 'data'])
LatData = namedtuple('LatData', ['pid', 'switch_data', 'wake_data', 'last_wake_data', 'running', 'wake_pend', 'latency', 'lat_total'])
# path_to_html = "/home/joelaf/repo/catapult/systrace/trace_sf-dispsync_rt_pull_fail_1504ms.html"
# path_to_html = "/home/joelaf/Downloads/trace_sf_late_wakeup_ipi.html"
# path_to_html = "/home/joelaf/repo/lisa/results/ChromeMonkey/trace.html"
parser = argparse.ArgumentParser(description='Analyze runnable times')
parser.add_argument('--trace', dest='trace_file', action='store', required=True,
help='trace file')
parser.add_argument('--rt', dest='rt', action='store_true', default=False,
help='only consider RT tasks')
parser.add_argument('--normalize', dest='normalize', action='store_true', default=False,
help='normalize time')
parser.add_argument('--rows', dest='nrows', action='store', default=20, type=int,
help='normalize time')
parser.add_argument('--total', dest='lat_total', action='store_true', default=False,
help='sort by total runnable time')
parser.add_argument('--start-time', dest='start_time', action='store', default=0, type=float,
help='trace window start time')
parser.add_argument('--end-time', dest='end_time', action='store', default=None, type=float,
help='trace window end time')
args = parser.parse_args()
path_to_html = args.trace_file
rtonly = args.rt
nrows = args.nrows
# "/home/joelaf/repo/lisa-aosp/results/camera-trace-manual/trace.html"
# path_to_html = "/home/joelaf/repo/catapult/systrace/trace_sf-dispsync_rt_pull_fail_1504ms.html"
# path_to_html = "/home/joelaf/Downloads/trace_sf_late_wakeup_ipi.html"
# path_to_html = "/home/joelaf/repo/lisa/results/ChromeMonkey/trace.html"
# Hash table of pid -> LatData named tuple
latpids = {}
# Debugging aids for debugging within the callbacks
dpid = 21047
debugg = False
normalize = False # Normalize with the base timestamp
printrows = False # Debug aid to print all switch and wake events in a time range
switch_events = []
wake_events = []
basetime = None
def switch_cb(data):
event = "switch"
prevpid = data['prev_pid']
nextpid = data['next_pid']
time = data['Index']
# print str(time) + ": " + str(data)
global basetime, switch_events
# basetime = time if (normalize and not basetime) else basetime
# time = time - basetime if normalize else time
e = EventData(time, event, data)
if printrows:
switch_events.append(e)
debug = False # debugg and (prevpid == dpid or nextpid == dpid)
if debug: print ("\nProcessing switch nextpid=" + str(nextpid) + " prevpid=" + str(prevpid) + \
" time=" + str(time))
# prev pid processing (switch out)
if latpids.has_key(prevpid):
if latpids[prevpid].running == 1:
latpids[prevpid] = latpids[prevpid]._replace(running=0)
if latpids[prevpid].wake_pend == 1:
print "Impossible: switch out during wake_pend " + str(e)
latpids[prevpid] = latpids[prevpid]._replace(wake_pend=0)
return
# raise RuntimeError("error")
if not latpids.has_key(nextpid):
return
# nextpid processing (switch in)
pid = nextpid
if latpids[pid].running == 1:
print "INFO: previous pid switch-out not seen for an event, ignoring\n" + str(e)
return
latpids[pid] = latpids[pid]._replace(running=1)
# Ignore latency calc for next-switch events for which wake never seen
# They are still valid in this scenario because of preemption
if latpids[pid].wake_pend == 0:
if debug: print "wake_pend = 0, doing nothing"
return
if debug: print "recording"
# Measure latency
lat = time - latpids[pid].last_wake_data.time
total = latpids[pid].lat_total + lat
latpids[pid] = latpids[pid]._replace(lat_total=total)
if lat > latpids[pid].latency:
latpids[pid] = LatData(pid, switch_data = e,
wake_data = latpids[pid].last_wake_data,
last_wake_data=None, latency=lat, lat_total=latpids[pid].lat_total, running=1, wake_pend=0)
return
latpids[pid] = latpids[pid]._replace(running=1, wake_pend=0)
def wake_cb(data):
event = "wake"
pid = data['pid']
time = data['Index']
debug = False # debugg and (pid == dpid)
global basetime, wake_events
# basetime = time if (normalize and not basetime) else basetime
# time = time - basetime if normalize else time
e = EventData(time, event, data)
wake_events.append(e)
if rtonly and data["prio"] > 99:
return
if debug: print "\nProcessing wake pid=" + str(pid) + " time=" + str(time)
if not latpids.has_key(pid):
latpids[pid] = LatData(pid, switch_data=None, wake_data=None,
last_wake_data = e, running=0, latency=-1, lat_total=0, wake_pend=1)
if debug: print "new wakeup"
return
if latpids[pid].running == 1 or latpids[pid].wake_pend == 1:
if debug: print "already running or wake_pend"
# Task already running or a wakeup->switch pending, ignore
return
if debug: print "recording wake"
latpids[pid] = latpids[pid]._replace(last_wake_data = e, wake_pend=1)
if args.normalize:
kwargs = { 'window': (args.start_time, args.end_time) }
else:
kwargs = { 'abs_window': (args.start_time, args.end_time) }
systrace_obj = trappy.SysTrace(name="systrace", path=path_to_html, \
scope="sched", events=["sched_switch", "sched_wakeup", "sched_waking"], normalize_time=args.normalize, **kwargs)
systrace_obj.apply_callbacks({ "sched_switch": switch_cb, "sched_wakeup": wake_cb, \
"sched_waking": wake_cb })
# Print the results: PID, latency, start, end, sort
if args.lat_total:
result = sorted(latpids.items(), key=lambda x: x[1].lat_total, reverse=True)
else:
result = sorted(latpids.items(), key=lambda x: x[1].latency, reverse=True)
print "PID".ljust(10) + "\t" + "name".ljust(20) + "\t" + "latency (secs)".ljust(20) + \
"\t" + "start time".ljust(20) + "\t" + "end time".ljust(20) + "\t" + "total (secs)".ljust(20)
for r in result[:nrows]:
l = r[1] # LatData named tuple
if l.pid != r[0]:
raise RuntimeError("BUG: pid inconsitency found") # Sanity check
wake_time = l.wake_data.time
switch_time = l.switch_data.time
total = l.lat_total
print str(r[0]).ljust(10) + "\t" + str(l.wake_data.data['comm']).ljust(20) + "\t" + \
str(l.latency).ljust(20)[:20] + "\t" + str(wake_time).ljust(20)[:20] + \
"\t" + str(switch_time).ljust(20)[:20] + "\t" + str(total).ljust(20)[:20]
#############################################################
## Debugging aids to print all events in a given time range #
#############################################################
def print_event_rows(events, start, end):
print "time".ljust(20) + "\t" + "event".ljust(10) + "\tpid" + "\tprevpid" + "\tnextpid"
for e in events:
if e.time < start or e.time > end:
continue
if e.event == "switch":
nextpid = e.data['next_pid']
prevpid = e.data['prev_pid']
pid = -1
elif e.event == "wake":
pid = e.data['pid']
nextpid = -1
prevpid = -1
else:
raise RuntimeError("unknown event seen")
print str(e.time).ljust(20)[:20] + "\t" + e.event.ljust(10) + "\t" + str(pid) + "\t" + str(prevpid) + "\t" + str(nextpid)
if printrows:
rows = switch_events + wake_events
rows = sorted(rows, key=lambda r: r.time)
print_event_rows(rows, 1.1, 1.2)
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