perf test optimization - part1

RevBy: Dmitry Rozenshtein
pull/1/head
Thyagarajan Balakrishnan 14 years ago
parent b2b373bd12
commit 0a432bd1c7

1
debian/changelog vendored

@ -10,6 +10,7 @@ applauncherd (3.0.1) unstable; urgency=low
* Changes: Fix python broken pipe randomly happened for Popen * Changes: Fix python broken pipe randomly happened for Popen
* Changes: Correct file path and dir path for applications started by booster-m * Changes: Correct file path and dir path for applications started by booster-m
* Changes: performance tests are run 5 times; 3 consistent values are considered * Changes: performance tests are run 5 times; 3 consistent values are considered
* Changes: performance test optimization part1
-- Alexey Shilov <alexey.shilov@nokia.com> Mon, 14 Nov 2011 13:39:38 +0200 -- Alexey Shilov <alexey.shilov@nokia.com> Mon, 14 Nov 2011 13:39:38 +0200

@ -7,6 +7,7 @@
<set name="test-command-line" description="Application startup time from command line" feature="AF DUI Booster for Launcher daemon" requirement="300195"> <set name="test-command-line" description="Application startup time from command line" feature="AF DUI Booster for Launcher daemon" requirement="300195">
<pre_steps> <pre_steps>
<step>source /tmp/session_bus_address.user; DISPLAY=:0 `pyversions -d` /usr/share/applauncherd-testscripts/test-func-launcher.py stop_applifed</step>
<step>/usr/bin/waitloadavg.rb -l 1.0 -p 1.0 -t 120</step> <step>/usr/bin/waitloadavg.rb -l 1.0 -p 1.0 -t 120</step>
</pre_steps> </pre_steps>
@ -16,6 +17,9 @@
<post_steps> <post_steps>
<step>cp /tmp/fala_wl.log /tmp/cmdline_fala_wl.log</step> <step>cp /tmp/fala_wl.log /tmp/cmdline_fala_wl.log</step>
<!-- starting applifed commented as it is started in the next set's post-step
<step>source /tmp/session_bus_address.user; DISPLAY=:0 `pyversions -d` /usr/share/applauncherd-testscripts/test-func-launcher.py start_applifed</step>
-->
</post_steps> </post_steps>
<environments> <environments>
@ -32,6 +36,9 @@
<set name="test-applicationGrid" description="Application startup time from application grid" feature="AF DUI Booster for Launcher daemon" requirement="300195"> <set name="test-applicationGrid" description="Application startup time from application grid" feature="AF DUI Booster for Launcher daemon" requirement="300195">
<pre_steps> <pre_steps>
<!-- stopping applifed commented as it is stopped in the previous set's pre-step
<step>source /tmp/session_bus_address.user; DISPLAY=:0 `pyversions -d` /usr/share/applauncherd-testscripts/test-func-launcher.py stop_applifed</step>
-->
<step>/usr/bin/waitloadavg.rb -l 1.0 -p 1.0 -t 120</step> <step>/usr/bin/waitloadavg.rb -l 1.0 -p 1.0 -t 120</step>
</pre_steps> </pre_steps>
@ -41,6 +48,7 @@
<post_steps> <post_steps>
<step>cp /tmp/fala_wl.log /tmp/grid_fala_wl.log</step> <step>cp /tmp/fala_wl.log /tmp/grid_fala_wl.log</step>
<step>source /tmp/session_bus_address.user; DISPLAY=:0 `pyversions -d` /usr/share/applauncherd-testscripts/test-func-launcher.py start_applifed</step>
</post_steps> </post_steps>

@ -7,6 +7,7 @@
<set name="test-command-line" description="Application startup time from command line" feature="AF DUI Booster for Launcher daemon" requirement="300195"> <set name="test-command-line" description="Application startup time from command line" feature="AF DUI Booster for Launcher daemon" requirement="300195">
<pre_steps> <pre_steps>
<step>source /tmp/session_bus_address.user; DISPLAY=:0 `pyversions -d` /usr/share/applauncherd-testscripts/test-func-launcher.py stop_applifed</step>
<step>/usr/bin/waitloadavg.rb -l 1.0 -p 1.0 -t 120</step> <step>/usr/bin/waitloadavg.rb -l 1.0 -p 1.0 -t 120</step>
</pre_steps> </pre_steps>
@ -16,6 +17,9 @@
<post_steps> <post_steps>
<step>cp /tmp/fala_qml_wl.log /tmp/cmdline_fala_qml_wl.log</step> <step>cp /tmp/fala_qml_wl.log /tmp/cmdline_fala_qml_wl.log</step>
<!-- starting applifed commented as it is started in the next set's post-step
<step>source /tmp/session_bus_address.user; DISPLAY=:0 `pyversions -d` /usr/share/applauncherd-testscripts/test-func-launcher.py start_applifed</step>
-->
</post_steps> </post_steps>
<environments> <environments>
@ -32,6 +36,9 @@
<set name="test-applicationGrid" description="Application startup time from application grid" feature="AF DUI Booster for Launcher daemon" requirement="300195"> <set name="test-applicationGrid" description="Application startup time from application grid" feature="AF DUI Booster for Launcher daemon" requirement="300195">
<pre_steps> <pre_steps>
<!-- stopping applifed commented as it is stopped in the previous set's pre-step
<step>source /tmp/session_bus_address.user; DISPLAY=:0 `pyversions -d` /usr/share/applauncherd-testscripts/test-func-launcher.py stop_applifed</step>
-->
<step>/usr/bin/waitloadavg.rb -l 1.0 -p 1.0 -t 120</step> <step>/usr/bin/waitloadavg.rb -l 1.0 -p 1.0 -t 120</step>
</pre_steps> </pre_steps>
@ -41,6 +48,7 @@
<post_steps> <post_steps>
<step>cp /tmp/fala_qml_wl.log /tmp/grid_fala_qml_wl.log</step> <step>cp /tmp/fala_qml_wl.log /tmp/grid_fala_qml_wl.log</step>
<step>source /tmp/session_bus_address.user; DISPLAY=:0 `pyversions -d` /usr/share/applauncherd-testscripts/test-func-launcher.py start_applifed</step>
</post_steps> </post_steps>
<!-- /QML --> <!-- /QML -->

@ -7,6 +7,7 @@
<set name="test-command-line" description="Application startup time from command line" feature="AF DUI Booster for Launcher daemon" requirement="300195"> <set name="test-command-line" description="Application startup time from command line" feature="AF DUI Booster for Launcher daemon" requirement="300195">
<pre_steps> <pre_steps>
<step>source /tmp/session_bus_address.user; DISPLAY=:0 `pyversions -d` /usr/share/applauncherd-testscripts/test-func-launcher.py stop_applifed</step>
<step>/usr/bin/waitloadavg.rb -l 1.0 -p 1.0 -t 120</step> <step>/usr/bin/waitloadavg.rb -l 1.0 -p 1.0 -t 120</step>
</pre_steps> </pre_steps>
@ -16,12 +17,14 @@
<case name="Perf-Test-Command-QML-plain" type="Performance" description="Measure startup time of the qml application without launcher" timeout="500" level="System" insignificant="false"> <case name="Perf-Test-Command-QML-plain" type="Performance" description="Measure startup time of the qml application without launcher" timeout="500" level="System" insignificant="false">
<step expected_result="0">source /tmp/session_bus_address.user; DISPLAY=:0 /usr/share/applauncherd-testscripts/test-perf.rb name test_performance -- -c /usr/bin/fala_qml_wol -b fala_qml_wol -f "/tmp/fala_qml_wol.log" &gt; /tmp/perf_commandline_qml_without_launcher.txt</step> <step expected_result="0">source /tmp/session_bus_address.user; DISPLAY=:0 /usr/share/applauncherd-testscripts/test-perf.rb name test_performance -- -c /usr/bin/fala_qml_wol -b fala_qml_wol -f "/tmp/fala_qml_wol.log" &gt; /tmp/perf_commandline_qml_without_launcher.txt</step>
</case> </case>
<post_steps> <post_steps>
<step>cp /tmp/fala_wol.log /tmp/cmdline_fala_wol.log</step> <step>cp /tmp/fala_wol.log /tmp/cmdline_fala_wol.log</step>
<step>cp /tmp/fala_qml_wol.log /tmp/cmdline_fala_qml_wol.log</step> <step>cp /tmp/fala_qml_wol.log /tmp/cmdline_fala_qml_wol.log</step>
<!-- starting applifed commented as it is started in the next set's post-step
<step>source /tmp/session_bus_address.user; DISPLAY=:0 `pyversions -d` /usr/share/applauncherd-testscripts/test-func-launcher.py start_applifed</step>
-->
</post_steps> </post_steps>
<environments> <environments>
@ -40,6 +43,9 @@
<set name="test-applicationGrid" description="Application startup time from application grid" feature="AF DUI Booster for Launcher daemon" requirement="300195"> <set name="test-applicationGrid" description="Application startup time from application grid" feature="AF DUI Booster for Launcher daemon" requirement="300195">
<pre_steps> <pre_steps>
<!-- stopping applifed commented as it is stopped in the previous set's pre-step
<step>source /tmp/session_bus_address.user; DISPLAY=:0 `pyversions -d` /usr/share/applauncherd-testscripts/test-func-launcher.py stop_applifed</step>
-->
<step>/usr/bin/waitloadavg.rb -l 1.0 -p 1.0 -t 120</step> <step>/usr/bin/waitloadavg.rb -l 1.0 -p 1.0 -t 120</step>
</pre_steps> </pre_steps>
@ -54,6 +60,7 @@
<post_steps> <post_steps>
<step>cp /tmp/fala_wol.log /tmp/grid_fala_wol.log</step> <step>cp /tmp/fala_wol.log /tmp/grid_fala_wol.log</step>
<step>cp /tmp/fala_qml_wol.log /tmp/grid_fala_qml_wol.log</step> <step>cp /tmp/fala_qml_wol.log /tmp/grid_fala_qml_wol.log</step>
<step>source /tmp/session_bus_address.user; DISPLAY=:0 `pyversions -d` /usr/share/applauncherd-testscripts/test-func-launcher.py start_applifed</step>
</post_steps> </post_steps>
<!-- /QML --> <!-- /QML -->

@ -134,33 +134,27 @@ end
sleep(2) sleep(2)
#run loop 4 times (4 seconds) if @meegoHome.test_object_exists?(:text => appName)
4.times do icon = @meegoHome.SwipeLauncherButton(:text => appName)
if @meegoHome.test_object_exists?(:text => appName)
icon = @meegoHome.SwipeLauncherButton(:text => appName)
while icon.attribute('visibleOnScreen') == 'false' || icon.attribute('y').to_i > 400
@meegoHome.SwipePannableViewport( :name => 'SwipePage' ).MWidget( :name => 'glass' ).gesture(:Up, 1, 350)
sleep(0.2)
icon.refresh
end
xpos = @meegoHome.SwipeLauncherButton(:text => appName).attribute('x')
xpos = xpos.to_i + 59
ypos = @meegoHome.SwipeLauncherButton(:text => appName).attribute('y')
ypos = ypos.to_i + 58
@pos = "#{xpos}x#{ypos}"
puts @pos
exit 0 #exit gracefully
end
sleep(1)
end
#icon does not exist while icon.attribute('visibleOnScreen') == 'false' || icon.attribute('y').to_i > 400
#raise error and exit @meegoHome.SwipePannableViewport( :name => 'SwipePage' ).MWidget( :name => 'glass' ).gesture(:Up, 1, 350)
puts "app not found" sleep(0.2)
raise "Application not found in Application grid" icon.refresh
exit 1 end
xpos = @meegoHome.SwipeLauncherButton(:text => appName).attribute('x')
xpos = xpos.to_i + 59
ypos = @meegoHome.SwipeLauncherButton(:text => appName).attribute('y')
ypos = ypos.to_i + 58
@pos = "#{xpos}x#{ypos}"
puts @pos
exit 0 #exit gracefully
else
#icon does not exist
#raise error and exit
puts "app not found"
raise "Application not found in Application grid"
exit 1
end

@ -74,6 +74,16 @@ class daemon_handling (unittest.TestCase):
def start_daemons(self): def start_daemons(self):
start_daemons() start_daemons()
def stop_applifed(self):
os.system("initctl stop xsession/applifed")
def start_applifed(self):
os.system("initctl start xsession/applifed")
#applifed start causes booster-m to be used to prestart applications.
#camera has the least priority and the last one to be prestarted.hence
#we wait for the camera to be up and running so that any more booster-m is not used up
wait_for_app('camera-ui')
def has_GL_context(processId, tries=2): def has_GL_context(processId, tries=2):
for i in range(tries): for i in range(tries):
processMapsFile = open("/proc/" + processId + "/maps") processMapsFile = open("/proc/" + processId + "/maps")

@ -48,7 +48,7 @@ class TC_PerformanceTests < Test::Unit::TestCase
$path = string = `echo $PATH ` $path = string = `echo $PATH `
def print_debug(msg) def print_debug(msg)
message = "[INFO] #{msg}\n" message = "[INFO] [#{Time.now.to_f}] #{msg}\n"
puts message puts message
end end
@ -79,7 +79,7 @@ class TC_PerformanceTests < Test::Unit::TestCase
end end
def wait_for_app(app, timeout = 40, wait = 1) def wait_for_app(app, timeout = 40, wait = 1)
pid = get_pid(app) pid = get_pid(app)
start = Time.now start = Time.now
while pid == nil and Time.now < start + timeout while pid == nil and Time.now < start + timeout
print_debug("Waiting for 1 sec") print_debug("Waiting for 1 sec")
@ -91,16 +91,16 @@ class TC_PerformanceTests < Test::Unit::TestCase
while len > 1 and Time.now < start + timeout while len > 1 and Time.now < start + timeout
print_debug("Waiting for 1 sec") print_debug("Waiting for 1 sec")
sleep(wait) sleep(wait)
pid = get_pid(app) pid = get_pid(app)
len = pid.length() len = pid.length()
if len == 1 if len == 1
break break
end end
end end
return pid return pid
end end
# method called before any test case # method called before any test case
def setup def setup
@ -108,11 +108,11 @@ class TC_PerformanceTests < Test::Unit::TestCase
system "echo performance > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor" system "echo performance > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor"
optparse = OptionParser.new do|opts| optparse = OptionParser.new do|opts|
options = {} options = {}
# Set a banner, displayed at the top # Set a banner, displayed at the top
# of the help screen. # of the help screen.
opts.banner = "Usage: get-coordinates.rb [options] " opts.banner = "Usage: test-perf.rb [options] "
options[:application] = nil options[:application] = nil
opts.on( '-a', '--application APP', 'Application name in application grid' ) do|app| opts.on( '-a', '--application APP', 'Application name in application grid' ) do|app|
options[:application] = app options[:application] = app
@ -156,7 +156,7 @@ class TC_PerformanceTests < Test::Unit::TestCase
opts.on( '-f', '--logFile LOG_FILE', 'Log file which stores the timestamps' ) do|logFile| opts.on( '-f', '--logFile LOG_FILE', 'Log file which stores the timestamps' ) do|logFile|
options[:logFile] = logFile options[:logFile] = logFile
end end
options[:pre_step] = nil options[:pre_step] = nil
opts.on( '-p', '--pre_step PRE_STEP', 'Command to be executed everytime before starting the application' ) do|pre_step| opts.on( '-p', '--pre_step PRE_STEP', 'Command to be executed everytime before starting the application' ) do|pre_step|
options[:pre_step] = pre_step options[:pre_step] = pre_step
@ -199,12 +199,14 @@ class TC_PerformanceTests < Test::Unit::TestCase
print_debug("Unlocking device") print_debug("Unlocking device")
system "mcetool --set-tklock-mode=unlocked" system "mcetool --set-tklock-mode=unlocked"
system "mcetool --set-inhibit-mode=stay-on" system "mcetool --set-inhibit-mode=stay-on"
end end
#print_debug("restart mthome")
#system("initctl restart xsession/mthome")
print_debug("restart mthome") #applifed stop/start moved test xml
system("initctl restart xsession/mthome") #print_debug("stop applifed")
print_debug("stop applifed") #system("initctl stop xsession/applifed")
system("initctl stop xsession/applifed")
print_debug("move #{MATTI_LOCATION} to #{TEMPORARY_MATTI_LOCATION}") print_debug("move #{MATTI_LOCATION} to #{TEMPORARY_MATTI_LOCATION}")
system "mv #{MATTI_LOCATION} #{TEMPORARY_MATTI_LOCATION}" system "mv #{MATTI_LOCATION} #{TEMPORARY_MATTI_LOCATION}"
@ -213,11 +215,11 @@ class TC_PerformanceTests < Test::Unit::TestCase
system("initctl restart xsession/applauncherd") system("initctl restart xsession/applauncherd")
#waiting for applauncherd and boosters to stabalise and up and running #waiting for applauncherd and boosters to stabalise and up and running
wait_for_app('applauncherd') wait_for_app('applauncherd')
wait_for_app('booster-q') wait_for_app('booster-q')
wait_for_app('booster-e') wait_for_app('booster-e')
wait_for_app('booster-d') wait_for_app('booster-d')
wait_for_app('booster-m') wait_for_app('booster-m')
x = `ps ax | grep applauncherd` x = `ps ax | grep applauncherd`
if x.split(/\n/)[0].include?("boot-mode") if x.split(/\n/)[0].include?("boot-mode")
print_debug("The applauncherd is running in boot mode") print_debug("The applauncherd is running in boot mode")
@ -226,40 +228,40 @@ class TC_PerformanceTests < Test::Unit::TestCase
end end
end end
# method called after any test case for cleanup purposes # method called after any test case for cleanup purposes
def teardown def teardown
print_debug ("exit from teardown") print_debug ("exit from teardown")
print_debug("move #{TEMPORARY_MATTI_LOCATION} to #{MATTI_LOCATION}") print_debug("move #{TEMPORARY_MATTI_LOCATION} to #{MATTI_LOCATION}")
system "mv #{TEMPORARY_MATTI_LOCATION} #{MATTI_LOCATION}" system "mv #{TEMPORARY_MATTI_LOCATION} #{MATTI_LOCATION}"
if @options[:application] != nil #if @options[:application] != nil
print_debug("restart mthome") # print_debug("restart mthome")
system("initctl restart xsession/mthome") # system("initctl restart xsession/mthome")
sleep(10) # sleep(10)
end #end
if not system "pgrep applauncherd" #if not system "pgrep applauncherd"
system("initctl start xsession/applauncherd") # system("initctl start xsession/applauncherd")
end #end
if not system "pgrep applifed"
system("initctl start xsession/applifed") #applifed stop/start moved test xml
#applifed start causes booster-m to be used to prestart applications. #if not system "pgrep applifed"
#Camera has the least priority and the last one to be prestarted.Hence # system("initctl start xsession/applifed")
#We wait for the camera to be up and running so that any more booster-m is not used up #applifed start causes booster-m to be used to prestart applications.
wait_for_app('camera-ui') #camera has the least priority and the last one to be prestarted.hence
end #we wait for the camera to be up and running so that any more booster-m is not used up
wait_for_app('applauncherd') # wait_for_app('camera-ui')
wait_for_app('booster-q') #end
wait_for_app('booster-e') #wait_for_app('applauncherd')
wait_for_app('booster-d') #wait_for_app('booster-q')
wait_for_app('booster-m') #wait_for_app('booster-e')
#wait_for_app('booster-d')
#wait_for_app('booster-m')
end end
def open_Apps(appName)
def open_Apps()
# Remove the log files if they exist # Remove the log files if they exist
if FileTest.exists?(PIXELCHANGED_LOG) if FileTest.exists?(PIXELCHANGED_LOG)
print_debug("remove #{PIXELCHANGED_LOG}") print_debug("remove #{PIXELCHANGED_LOG}")
@ -277,7 +279,7 @@ class TC_PerformanceTests < Test::Unit::TestCase
sleep(2) sleep(2)
# execute the optional command if available # execute the optional command if available
if @options[:pre_step] != nil if @options[:pre_step] != nil
print_debug ("pre_step: #{@options[:pre_step]}") print_debug ("pre_step: #{@options[:pre_step]}")
system "#{@options[:pre_step]}" system "#{@options[:pre_step]}"
end end
@ -306,7 +308,7 @@ class TC_PerformanceTests < Test::Unit::TestCase
#print_debug("Check the avarage system load is under 0.3") #print_debug("Check the avarage system load is under 0.3")
#system "/usr/bin/waitloadavg.rb -l 0.3 -p 1.0 -t 100" #system "/usr/bin/waitloadavg.rb -l 0.3 -p 1.0 -t 100"
cmd = 0 cmd = 0
if (x_val >= 0 && x_val <= 420) if (x_val >= 0 && x_val <= 420)
if (y_val >= 240 && y_val <= 480) if (y_val >= 240 && y_val <= 480)
cmd = "#{PIXELCHANGED_BINARY} -c #{@pos} -t 101x4 -t 845x473 -f #{PIXELCHANGED_LOG} -q" cmd = "#{PIXELCHANGED_BINARY} -c #{@pos} -t 101x4 -t 845x473 -f #{PIXELCHANGED_LOG} -q"
elsif (y_val >= 0 && y_val <= 239) elsif (y_val >= 0 && y_val <= 239)
@ -334,10 +336,10 @@ class TC_PerformanceTests < Test::Unit::TestCase
print_debug("pkill :#{@options[:binary]}") print_debug("pkill :#{@options[:binary]}")
system "pkill #{@options[:binary]}" system "pkill #{@options[:binary]}"
end end
def read_file(appName)
def read_file()
def get_matching_lines(lines, re) def get_matching_lines(lines, re)
# return a list of lines that match re # return a list of lines that match re
lines.collect { |x| if x[1] =~ re; x; else; nil; end }.compact lines.collect { |x| if x[1] =~ re; x; else; nil; end }.compact
@ -380,7 +382,7 @@ class TC_PerformanceTests < Test::Unit::TestCase
print_debug("started at: #{@start_time}") print_debug("started at: #{@start_time}")
print_debug("pixel changed: #{@end_time}") print_debug("pixel changed: #{@end_time}")
end end
#find the variance of the values in the array #find the variance of the values in the array
def var(arr) def var(arr)
total = 0 total = 0
@ -430,7 +432,7 @@ class TC_PerformanceTests < Test::Unit::TestCase
app_cache_sum = 0 app_cache_sum = 0
win_cache_sum = 0 win_cache_sum = 0
start_time_list = [] start_time_list = []
app_cache_list = [] app_cache_list = []
win_cache_list = [] win_cache_list = []
@ -441,29 +443,20 @@ class TC_PerformanceTests < Test::Unit::TestCase
print_debug("Kill #{PIXELCHANGED_BINARY} if any before launching ") print_debug("Kill #{PIXELCHANGED_BINARY} if any before launching ")
system("pkill #{PIXELCHANGED_BINARY}") system("pkill #{PIXELCHANGED_BINARY}")
open_Apps(@options[:application]) open_Apps()
read_file()
sleep (5) app_cache_list.push(@app_from_cache) if @options[:appCache] != nil
win_cache_list.push(@win_from_cache) if @options[:winCache] != nil
read_file(@options[:application])
if @options[:appCache] != nil
app_cache_list.push(@app_from_cache)
end
if @options[:winCache] != nil
win_cache_list.push(@win_from_cache)
end
delay = @end_time - @start_time - MCOMPOSITOR_XGRABSERVER_DELAY_CONSTANT delay = @end_time - @start_time - MCOMPOSITOR_XGRABSERVER_DELAY_CONSTANT
#start_time_sum += delay #start_time_sum += delay
start_time_list.push(delay) start_time_list.push(delay)
print_debug("startup delay for count #{i} = #{delay}") print_debug("startup delay for count #{i} = #{delay}")
end end
# get the valid indexes for which the average is going to be computed # get the valid indexes for which the average is going to be computed
valid_indices = find_valid_indices(start_time_list) valid_indices = find_valid_indices(start_time_list)
# compute the start_time_sum, app_cache_sum, win_cache_sum from the valid indexes # compute the start_time_sum, app_cache_sum, win_cache_sum from the valid indexes
valid_values = [] valid_values = []
valid_indices.each do |x| valid_indices.each do |x|
@ -503,7 +496,7 @@ class TC_PerformanceTests < Test::Unit::TestCase
print_debug("Check that MApplicationWindow from cache takes less than #{@options[:winCache]} ms") print_debug("Check that MApplicationWindow from cache takes less than #{@options[:winCache]} ms")
assert((win_cache_sum/COUNT) < @options[:winCache], "Application: #{@options[:application]} avarage window-cache was slower than #{@options[:winCache]} ms") assert((win_cache_sum/COUNT) < @options[:winCache], "Application: #{@options[:application]} avarage window-cache was slower than #{@options[:winCache]} ms")
end end
end end
end end

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