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mainProfiler.lua
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mainProfiler.lua
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----------------------------------------------------------------------
--
-- Deep time series learning: Temporal complexity profiling
--
-- Functions for time profiling :
-- -- Activate the profiler
-- profiler = newProfiler();
-- profiler:start();
--
-- -- Print the result of profiling
-- profiler:stop()
-- local outfile = io.open( "profile.txt", "w+" )
-- profiler:report( outfile )
-- outfile:close()
--
----------------------------------------------------------------------
--
-- All profiler related stuff is stored in the top level table '_profiler'
--
_profiler = {}
--
-- newProfiler() creates a new profiler object for managing
-- the profiler and storing state. Note that only one profiler
-- object can be executing at one time.
--
function newProfiler(variant, sampledelay)
if _profiler.running then
print("Profiler already running.")
return
end
variant = variant or "time"
if variant ~= "time" and variant ~= "call" then
print("Profiler method must be 'time' or 'call'.")
return
end
local newprof = {}
for k,v in pairs(_profiler) do
newprof[k] = v
end
newprof.variant = variant
newprof.sampledelay = sampledelay or 100000
return newprof
end
--
-- This function starts the profiler. It will do nothing
-- if this (or any other) profiler is already running.
--
function _profiler.start(self)
if _profiler.running then
return
end
-- Start the profiler. This begins by setting up internal profiler state
_profiler.running = self
self.rawstats = {}
self.callstack = {}
if self.variant == "time" then
self.lastclock = os.clock()
debug.sethook( _profiler_hook_wrapper_by_time, "", self.sampledelay )
elseif self.variant == "call" then
debug.sethook( _profiler_hook_wrapper_by_call, "cr" )
else
print("Profiler method must be 'time' or 'call'.")
sys.exit(1)
end
end
--
-- This function stops the profiler. It will do nothing
-- if a profiler is not running, and nothing if it isn't
-- the currently running profiler.
--
function _profiler.stop(self)
if _profiler.running ~= self then
return
end
-- Stop the profiler.
debug.sethook( nil )
_profiler.running = nil
end
--
-- Simple wrapper to handle the hook. You should not
-- be calling this directly. Duplicated to reduce overhead.
--
function _profiler_hook_wrapper_by_call(action)
if _profiler.running == nil then
debug.sethook( nil )
end
_profiler.running:_internal_profile_by_call(action)
end
function _profiler_hook_wrapper_by_time(action)
if _profiler.running == nil then
debug.sethook( nil )
end
_profiler.running:_internal_profile_by_time(action)
end
--
-- This is the main by-function-call function of the profiler and should not
-- be called except by the hook wrapper
--
function _profiler._internal_profile_by_call(self,action)
-- Since we can obtain the 'function' for the item we've had call us, we
-- can use that...
local caller_info = debug.getinfo( 3 )
if caller_info == nil then
print "No caller_info"
return
end
--SHG_LOG("[_profiler._internal_profile] "..(caller_info.name or "<nil>"))
-- Retrieve the most recent activation record...
local latest_ar = nil
if table.getn(self.callstack) > 0 then
latest_ar = self.callstack[table.getn(self.callstack)]
end
-- Are we allowed to profile this function?
local should_not_profile = 0
for k,v in pairs(self.prevented_functions) do
if k == caller_info.func then
should_not_profile = v
end
end
-- Also check the top activation record...
if latest_ar then
if latest_ar.should_not_profile == 2 then
should_not_profile = 2
end
end
-- Now then, are we in 'call' or 'return' ?
-- print("Profile:", caller_info.name, "SNP:", should_not_profile,
-- "Action:", action )
if action == "call" then
-- Making a call...
local this_ar = {}
this_ar.should_not_profile = should_not_profile
this_ar.parent_ar = latest_ar
this_ar.anon_child = 0
this_ar.name_child = 0
this_ar.children = {}
this_ar.children_time = {}
this_ar.clock_start = os.clock()
-- Last thing to do on a call is to insert this onto the ar stack...
table.insert( self.callstack, this_ar )
else
local this_ar = latest_ar
if this_ar == nil then
return -- No point in doing anything if no upper activation record
end
-- Right, calculate the time in this function...
this_ar.clock_end = os.clock()
this_ar.this_time = this_ar.clock_end - this_ar.clock_start
-- Now, if we have a parent, update its call info...
if this_ar.parent_ar then
this_ar.parent_ar.children[caller_info.func] =
(this_ar.parent_ar.children[caller_info.func] or 0) + 1
this_ar.parent_ar.children_time[caller_info.func] =
(this_ar.parent_ar.children_time[caller_info.func] or 0 ) +
this_ar.this_time
if caller_info.name == nil then
this_ar.parent_ar.anon_child =
this_ar.parent_ar.anon_child + this_ar.this_time
else
this_ar.parent_ar.name_child =
this_ar.parent_ar.name_child + this_ar.this_time
end
end
-- Now if we're meant to record information about ourselves, do so...
if this_ar.should_not_profile == 0 then
local inforec = self:_get_func_rec(caller_info.func,1)
inforec.count = inforec.count + 1
inforec.time = inforec.time + this_ar.this_time
inforec.anon_child_time = inforec.anon_child_time + this_ar.anon_child
inforec.name_child_time = inforec.name_child_time + this_ar.name_child
inforec.func_info = caller_info
for k,v in pairs(this_ar.children) do
inforec.children[k] = (inforec.children[k] or 0) + v
inforec.children_time[k] =
(inforec.children_time[k] or 0) + this_ar.children_time[k]
end
end
-- Last thing to do on return is to drop the last activation record...
table.remove( self.callstack, table.getn( self.callstack ) )
end
end
--
-- This is the main by-time internal function of the profiler and should not
-- be called except by the hook wrapper
--
function _profiler._internal_profile_by_time(self,action)
-- we do this first so we add the minimum amount of extra time to this call
local timetaken = os.clock() - self.lastclock
local depth = 3
local at_top = true
local last_caller
local caller = debug.getinfo(depth)
while caller do
if not caller.func then caller.func = "(tail call)" end
if self.prevented_functions[caller.func] == nil then
local info = self:_get_func_rec(caller.func, 1, caller)
info.count = info.count + 1
info.time = info.time + timetaken
if last_caller then
-- we're not the head, so update the "children" times also
if last_caller.name then
info.name_child_time = info.name_child_time + timetaken
else
info.anon_child_time = info.anon_child_time + timetaken
end
info.children[last_caller.func] =
(info.children[last_caller.func] or 0) + 1
info.children_time[last_caller.func] =
(info.children_time[last_caller.func] or 0) + timetaken
end
end
depth = depth + 1
last_caller = caller
caller = debug.getinfo(depth)
end
self.lastclock = os.clock()
end
--
-- This returns a (possibly empty) function record for
-- the specified function. It is for internal profiler use.
--
function _profiler._get_func_rec(self,func,force,info)
-- Find the function ref for 'func' (if force and not present, create one)
local ret = self.rawstats[func]
if ret == nil and force ~= 1 then
return nil
end
if ret == nil then
-- Build a new function statistics table
ret = {}
ret.func = func
ret.count = 0
ret.time = 0
ret.anon_child_time = 0
ret.name_child_time = 0
ret.children = {}
ret.children_time = {}
ret.func_info = info
self.rawstats[func] = ret
end
return ret
end
--
-- This writes a profile report to the output file object. If
-- sort_by_total_time is nil or false the output is sorted by
-- the function time minus the time in it's children.
--
function _profiler.report( self, outfile, sort_by_total_time )
outfile:write
[[Lua Profile output created by profiler.lua. Copyright Pepperfish 2002+
]]
-- This is pretty awful.
local terms = {}
if self.variant == "time" then
terms.capitalized = "Sample"
terms.single = "sample"
terms.pastverb = "sampled"
elseif self.variant == "call" then
terms.capitalized = "Call"
terms.single = "call"
terms.pastverb = "called"
else
assert(false)
end
local total_time = 0
local ordering = {}
for func,record in pairs(self.rawstats) do
table.insert(ordering, func)
end
if sort_by_total_time then
table.sort( ordering,
function(a,b) return self.rawstats[a].time > self.rawstats[b].time end
)
else
table.sort( ordering,
function(a,b)
local arec = self.rawstats[a]
local brec = self.rawstats[b]
local atime = arec.time - (arec.anon_child_time + arec.name_child_time)
local btime = brec.time - (brec.anon_child_time + brec.name_child_time)
return atime > btime
end
)
end
for i=1,table.getn(ordering) do
local func = ordering[i]
local record = self.rawstats[func]
local thisfuncname = " " .. self:_pretty_name(func) .. " "
if string.len( thisfuncname ) < 42 then
thisfuncname =
string.rep( "-", (42 - string.len(thisfuncname))/2 ) .. thisfuncname
thisfuncname =
thisfuncname .. string.rep( "-", 42 - string.len(thisfuncname) )
end
total_time = total_time + ( record.time - ( record.anon_child_time +
record.name_child_time ) )
outfile:write( string.rep( "-", 19 ) .. thisfuncname ..
string.rep( "-", 19 ) .. "\n" )
outfile:write( terms.capitalized.." count: " ..
string.format( "%4d", record.count ) .. "\n" )
outfile:write( "Time spend total: " ..
string.format( "%4.3f", record.time ) .. "s\n" )
outfile:write( "Time spent in children: " ..
string.format("%4.3f",record.anon_child_time+record.name_child_time) ..
"s\n" )
local timeinself =
record.time - (record.anon_child_time + record.name_child_time)
outfile:write( "Time spent in self: " ..
string.format("%4.3f", timeinself) .. "s\n" )
outfile:write( "Time spent per " .. terms.single .. ": " ..
string.format("%4.5f", record.time/record.count) ..
"s/" .. terms.single .. "\n" )
outfile:write( "Time spent in self per "..terms.single..": " ..
string.format( "%4.5f", timeinself/record.count ) .. "s/" ..
terms.single.."\n" )
-- Report on each child in the form
-- Child <funcname> called n times and took a.bs
local added_blank = 0
for k,v in pairs(record.children) do
if self.prevented_functions[k] == nil or
self.prevented_functions[k] == 0
then
if added_blank == 0 then
outfile:write( "\n" ) -- extra separation line
added_blank = 1
end
outfile:write( "Child " .. self:_pretty_name(k) ..
string.rep( " ", 41-string.len(self:_pretty_name(k)) ) .. " " ..
terms.pastverb.." " .. string.format("%6d", v) )
outfile:write( " times. Took " ..
string.format("%4.2f", record.children_time[k] ) .. "s\n" )
end
end
outfile:write( "\n" ) -- extra separation line
outfile:flush()
end
outfile:write( "\n\n" )
outfile:write( "Total time spent in profiled functions: " ..
string.format("%5.3g",total_time) .. "s\n" )
outfile:write( [[
END
]] )
outfile:flush()
end
--
-- This writes the profile to the output file object as
-- loadable Lua source.
--
function _profiler.lua_report(self,outfile)
-- Purpose: Write out the entire raw state in a cross-referenceable form.
local ordering = {}
local functonum = {}
for func,record in pairs(self.rawstats) do
table.insert(ordering, func)
functonum[func] = table.getn(ordering)
end
outfile:write(
"-- Profile generated by profiler.lua Copyright Pepperfish 2002+\n\n" )
outfile:write( "-- Function names\nfuncnames = {}\n" )
for i=1,table.getn(ordering) do
local thisfunc = ordering[i]
outfile:write( "funcnames[" .. i .. "] = " ..
string.format("%q", self:_pretty_name(thisfunc)) .. "\n" )
end
outfile:write( "\n" )
outfile:write( "-- Function times\nfunctimes = {}\n" )
for i=1,table.getn(ordering) do
local thisfunc = ordering[i]
local record = self.rawstats[thisfunc]
outfile:write( "functimes[" .. i .. "] = { " )
outfile:write( "tot=" .. record.time .. ", " )
outfile:write( "achild=" .. record.anon_child_time .. ", " )
outfile:write( "nchild=" .. record.name_child_time .. ", " )
outfile:write( "count=" .. record.count .. " }\n" )
end
outfile:write( "\n" )
outfile:write( "-- Child links\nchildren = {}\n" )
for i=1,table.getn(ordering) do
local thisfunc = ordering[i]
local record = self.rawstats[thisfunc]
outfile:write( "children[" .. i .. "] = { " )
for k,v in pairs(record.children) do
if functonum[k] then -- non-recorded functions will be ignored now
outfile:write( functonum[k] .. ", " )
end
end
outfile:write( "}\n" )
end
outfile:write( "\n" )
outfile:write( "-- Child call counts\nchildcounts = {}\n" )
for i=1,table.getn(ordering) do
local thisfunc = ordering[i]
local record = self.rawstats[thisfunc]
outfile:write( "children[" .. i .. "] = { " )
for k,v in record.children do
if functonum[k] then -- non-recorded functions will be ignored now
outfile:write( v .. ", " )
end
end
outfile:write( "}\n" )
end
outfile:write( "\n" )
outfile:write( "-- Child call time\nchildtimes = {}\n" )
for i=1,table.getn(ordering) do
local thisfunc = ordering[i]
local record = self.rawstats[thisfunc];
outfile:write( "children[" .. i .. "] = { " )
for k,v in pairs(record.children) do
if functonum[k] then -- non-recorded functions will be ignored now
outfile:write( record.children_time[k] .. ", " )
end
end
outfile:write( "}\n" )
end
outfile:write( "\n\n-- That is all.\n\n" )
outfile:flush()
end
-- Internal function to calculate a pretty name for the profile output
function _profiler._pretty_name(self,func)
-- Only the data collected during the actual
-- run seems to be correct.... why?
local info = self.rawstats[ func ].func_info
-- local info = debug.getinfo( func )
local name = ""
if info.what == "Lua" then
name = "L:"
end
if info.what == "C" then
name = "C:"
end
if info.what == "main" then
name = " :"
end
if info.name == nil then
name = name .. "<"..tostring(func) .. ">"
else
name = name .. info.name
end
if info.source then
name = name .. "@" .. info.source
else
if info.what == "C" then
name = name .. "@?"
else
name = name .. "@<string>"
end
end
name = name .. ":"
if info.what == "C" then
name = name .. "?"
else
name = name .. info.linedefined
end
return name
end
--
-- This allows you to specify functions which you do
-- not want profiled. Setting level to 1 keeps the
-- function from being profiled. Setting level to 2
-- keeps both the function and its children from
-- being profiled.
--
-- BUG: 2 will probably act exactly like 1 in "time" mode.
-- If anyone cares, let me (zorba) know and it can be fixed.
--
function _profiler.prevent(self, func, level)
self.prevented_functions[func] = (level or 1)
end
_profiler.prevented_functions = {
[_profiler.start] = 2,
[_profiler.stop] = 2,
[_profiler._internal_profile_by_time] = 2,
[_profiler._internal_profile_by_call] = 2,
[_profiler_hook_wrapper_by_time] = 2,
[_profiler_hook_wrapper_by_call] = 2,
[_profiler.prevent] = 2,
[_profiler._get_func_rec] = 2,
[_profiler.report] = 2,
[_profiler.lua_report] = 2,
[_profiler._pretty_name] = 2
}