本文介绍了一个用Lua编写的简单性能分析工具。该工具使用os.time()函数进行秒级精确测量，可测量行执行计数和时间，还可对输出数据优化。文中给出了使用示例，包括启动、停止分析及查看结果等操作，还介绍了相关函数及功能。
//////////////////////////// Profiler in lua /////////////////////////////////////
This is a (very) simple profiler module written entirely in Lua. It uses the os.time() function for second-precise measurements.
(It was written in about 12 minutes, so bear with me here. --Pedro)
Usage: call Profiler:activate() to start measuring, Profiler:deactivate() to stop, and then Profiler:print_results() to see the results. Tweak the print function to your heart's desire to sort the way you want, etc.
Note that through overloading os.time() with a non-ANSI, millisecond-precision function one can enhance the thing. But for my application seconds was good enough to spot the lines that were making time go quadratical instead of linear.
Also note that for now it can only measure line execution counts and times. One could extend it to call execution if necessary. Some preparations have been made, but not nearly enough.
--| Profiler module.
--b "Pedro Miller Rabinovitch" <miller@inf.puc-rio.br>
--$Id: prof.lua,v 1.4 2003/10/17 00:17:21 miller Exp $
--TODO add function call profiling. Some of the skeleton is already in
--- place, but call profiling behaves different, so a couple of new
--- functionalities must be added.
--TODO add methods for proper result retrieval
--TODO use optional clock() function for millisecond precision, if it's
--- available
local E, I = {}, {}
--& Profiler module.
Profiler = E
--. Keeps track of the hit counts of each item
E.counts = {
line = {}
}
--. These should be inside the _line_ table above.
E.last_line = nil
E.last_time = os.time()
E.started, E.ended = nil, nil
--% Activates the profiling system.
--@ [kind] (string) Optional hook kind. For now, only 'line' works,
--- so just avoid it. >: )
function E:activate( kind )
kind = kind or 'line'
local function hook_counter( hk_name, param,... )
local t = self.counts[hk_name][param]
if t == nil then
t = { count=0, time = 0 }
self.counts[hk_name][param] = t
end
self.counts[hk_name][param].count =
self.counts[hk_name][param].count + 1
if self.last_line then
local delta = os.time() - self.last_time
if delta > 0 then
self.counts[hk_name][self.last_line].time =
self.counts[hk_name][self.last_line].time + delta
self.last_time = os.time()
end
end
self.last_line = param
end
self.started = os.time()
debug.sethook( hook_counter, kind )
end
--% Deactivates the profiling system.
--@ [kind] (string) Optional hook kind. For now, only 'line' works,
--- so just avoid it.
function E:deactivate( kind )
kind = kind or 'line'
self.ended = os.time()
debug.sethook( nil, kind )
end
--% Prints the results.
--@ [kind] (string) Optional hook... Aah, you got it by now.
--TODO add print output formatting and sorting
function E:print_results( kind )
kind = kind or 'line'
print( kind, 'count', 'approx. time (s)' )
print( '----', '-----', '----------------' )
for i,v in pairs( self.counts[kind] ) do
print( i, v.count, v.time )
end
print( self.ended - self.started,
' second(s) total (approximately).' )
end
////////////////////// Pepperfish lua profiler /////////////////
the Lua 5.1 version is posted below.
--[[
== Introduction ==
Note that this requires os.clock(), debug.sethook(),
and debug.getinfo() or your equivalent replacements to
be available if this is an embedded application.
Example usage:
profiler = newProfiler()
profiler:start()
< call some functions that take time >
profiler:stop()
local outfile = io.open( "profile.txt", "w+" )
profiler:report( outfile )
outfile:close()
== Optionally choosing profiling method ==
The rest of this comment can be ignored if you merely want a good profiler.
newProfiler(method, sampledelay):
If method is omitted or "time", will profile based on real performance.
optionally, frequency can be provided to control the number of opcodes
per profiling tick. By default this is 100000, which (on my system) provides
one tick approximately every 2ms and reduces system performance by about 10%.
This can be reduced to increase accuracy at the cost of performance, or
increased for the opposite effect.
If method is "call", will profile based on function calls. Frequency is
ignored.
"time" may bias profiling somewhat towards large areas with "simple opcodes",
as the profiling function (which introduces a certain amount of unavoidable
overhead) will be called more often. This can be minimized by using a larger
sample delay - the default should leave any error largely overshadowed by
statistical noise. With a delay of 1000 I was able to achieve inaccuray of
approximately 25%. Increasing the delay to 100000 left inaccuracy below my
testing error.
"call" may bias profiling heavily towards areas with many function calls.
Testing found a degenerate case giving a figure inaccurate by approximately
20,000%. (Yes, a multiple of 200.) This is, however, more directly comparable
to common profilers (such as gprof) and also gives accurate function call
counts, which cannot be retrieved from "time".
I strongly recommend "time" mode, and it is now the default.
== History ==
2021-01-04 - Larry Deaton ( larry.deaton@dynetics.com )
Modified the profiling by "call" operation to ignore internal LUA functions
since LUA only provides debug hooks for the calling of the function and not
the return of the function. Without this change, the call stack is
continually growing.
2008-09-16 - Time-based profiling and conversion to Lua 5.1
by Ben Wilhelm ( zorba-pepperfish@pavlovian.net ).
Added the ability to optionally choose profiling methods, along with a new
profiling method.
Converted to Lua 5, a few improvements, and
additional documentation by Tom Spilman ( tom@sickheadgames.com )
Additional corrections and tidying by original author
Daniel Silverstone ( dsilvers@pepperfish.net )
== Status ==
Daniel Silverstone is no longer using this code, and judging by how long it's
been waiting for Lua 5.1 support, I don't think Tom Spilman is either. I'm
perfectly willing to take on maintenance, so if you have problems or
questions, go ahead and email me :)
-- Ben Wilhelm ( zorba-pepperfish@pavlovian.net ) '
== Copyright ==
Lua profiler - Copyright Pepperfish 2002,2003,2004
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to
deal in the Software without restriction, including without limitation the
rights to use, copy, modify, merge, publish, distribute, and/or sell copies
of the Software, and to permit persons to whom the Software is furnished to
do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
IN THE SOFTWARE.
--]]
--
-- 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
if caller_info.short_src == "[C]" then
-- LMD -- These are builtin functions and for some reason the
-- debug hook does not catch the return of these functions.
-- So, for now, we are just going to skip them.
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
}
本工具只适用于Call模式的分析。
对原工具的输出数据做了优化。
--[[
Example usage:
profiler = newProfiler(false)
profiler:start()
< call some functions that take time >
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(bRecordCFun)
if _profiler.running then
print("Profiler already running.")
return
end
local newprof = {}
for k,v in pairs(_profiler) do
newprof[k] = v
end
newprof.variant = "call"
newprof.bRecordCFun = bRecordCFun==nil and true or false; --记录C方法
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 = {}
self.currPos_ar = nil; --定位当前执行函数
self.cache_lineInfo = {};
self.cache_startTime = os.clock();
self.lineProfiler_cost_time = 0;
debug.sethook( _profiler_hook_wrapper_by_call, "crl" )
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
CppLog("[all profiler time]"..os.clock()-self.cache_startTime.."ms")
-- CppLog("[lineProfiler_cost_time]"..self.lineProfiler_cost_time.."ms")
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
--
-- 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
if self.bRecordCFun == false and caller_info.what == "C" then
return;
end
self.profile_start_Time = os.clock();
--[[
caller_info:
table: 0x00472a38 = {
["linedefined"] = 797,
["currentline"] = 797,
["func"] = function: 0x0013dd50,
["isvararg"] = false,
["namewhat"] = "global"
["lastlinedefined"] = 799,
["source"] = "@GamePlay\ServerEntry.lua"
["nups"] = 0,
["what"] = "Lua"
["nparams"] = 0,
["name"] = "zxjFunD"
["short_src"] = "GamePlay\ServerEntry.lua"
}
call return 不一致测试:
function zxjFunA()
for i = 1, 100000, 1 do
local a = {}
end
end
function zxjFunB()
for i = 1, 100000, 1 do
local a = {}
end
zxjFunA()
end
function zxjFunC()
zxjFunB()
end
function zxjFunD()
for i = 1, 100000, 1 do
local a = {}
end
return zxjFunC() --直接return fun 会导致return 不一致
end
function zxjFunE()
zxjFunD();
end
call: zxjFunE();
结果：
[CppLog] Call callTimesss:1 func:function: 0x00b6a598 linedefined:806 funName:zxjFunE
[CppLog]
[CppLog] Call callTimesss:2 func:function: 0x00b6a580 linedefined:800 funName:zxjFunD
[CppLog]
[CppLog] Call callTimesss:3 func:function: 0x00b6a568 linedefined:797 funName:zxjFunD --此处call 的funName其实应该是zxjFunC
[CppLog]
[CppLog] Call callTimesss:4 func:function: 0x00b6a550 linedefined:791 funName:zxjFunB
[CppLog]
[CppLog] Call callTimesss:5 func:function: 0x00b6a538 linedefined:786 funName:zxjFunA
[CppLog]
[CppLog] Return callTimesss:5 func:function: 0x00b6a538 linedefined:786 funName:zxjFunA
[CppLog]
[CppLog] Return callTimesss:4 func:function: 0x00b6a550 linedefined:791 funName:zxjFunB
[CppLog]
[CppLog] Return callTimesss:3 func:function: 0x00b6a568 linedefined:797 funName:zxjFunD --缺少一次return 本次return其实是zxjFunC
[CppLog]
[CppLog] Return callTimesss:2 func:function: 0x00b6a598 linedefined:806 funName:zxjFunE
]]
if action == "line" then
self.cache_lineInfo.source = caller_info.source; --记录最近一次逐行调用信息
self.cache_lineInfo.line = caller_info.currentline;
self.lineProfiler_cost_time = self.lineProfiler_cost_time + os.clock() - self.profile_start_Time;
return;
end
CppLog("")
-- CppLog(action.." name:"..caller_info.source.." "..caller_info.name..caller_info.linedefined.." currentline:"..caller_info.currentline)
CppLog(action.." name:"..caller_info.name.." :"..caller_info.linedefined)
if action == "call" then
-- CppLog("[cache_lineInfo] source:"..self.cache_lineInfo.source.. " line:"..self.cache_lineInfo.line);
-- add line profiler cost time to currPos_ar
if nil ~= self.currPos_ar then
self.currPos_ar.line_cost_time = self.currPos_ar.line_cost_time + self.lineProfiler_cost_time;
self.lineProfiler_cost_time = 0;
end
-- TO: get realy parent function for this call
-- 判定call的位置是否当前定位函数的内部
--[[
当前记录的执行函数不一定时此次call的父函数的原因： call和return的不一致
eg:
fun A() B(); return 0; end
fun B() return C() end
fun C() return 0; end
A();
call A,
call B,
call C,
return C,
return A,
加入D函数:
fun A() B(); D();return 0; end
fun B() return C() end
fun C() return 0; end
fun D() return 0; end
A();
call A,
call B,
call C,
return C,
no return B,
call D,
没执行该处理，则 D 的父函数视为B，但实际情况D的父函数可以为A
]]
while nil ~= self.currPos_ar and
(self.cache_lineInfo.source ~= self.currPos_ar.source or
(self.cache_lineInfo.line < self.currPos_ar.linedefined or
self.cache_lineInfo.line > self.currPos_ar.lastlinedefined)) do
self:_one_fun_return(self.currPos_ar.caller_info);
end
local latest_ar = self.currPos_ar
-- 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
-- if latest_ar then
-- CppLog("[parent]name:"..latest_ar.fun_name..latest_ar.linedefined);
-- end
-- 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 = self.profile_start_Time
this_ar.func = caller_info.func;
this_ar.source = caller_info.source;
this_ar.linedefined = caller_info.linedefined;
this_ar.lastlinedefined = caller_info.lastlinedefined;
this_ar.fun_name = caller_info.name or tostring(caller_info.func);
this_ar.caller_info = caller_info;
this_ar.line_cost_time = 0; --行分析消耗时间
-- Last thing to do on a call is to insert this onto the ar stack...
table.insert( self.callstack, this_ar )
-- CppLog("len:"..#self.callstack)
--fun call update currpos
self.currPos_ar = this_ar;
-- CppLog("[setCurPos2] name:"..self.currPos_ar.fun_name..self.currPos_ar.linedefined.."["..self.currPos_ar.linedefined..","..self.currPos_ar.lastlinedefined.."] source:"..self.currPos_ar.source)
this_ar.proflier_time = os.clock() - self.profile_start_Time; --call 的分析消耗时间
-- CppLog(this_ar.fun_name..this_ar.linedefined.." proflier_time:"..this_ar.proflier_time);
elseif action == "return" then
-- add line profiler cost time to currPos_ar
if nil ~= self.currPos_ar then
self.currPos_ar.line_cost_time = self.currPos_ar.line_cost_time + self.lineProfiler_cost_time;
self.lineProfiler_cost_time = 0;
end
-- 因为call return 不一致
-- 需要将跳过的return做计算
for i = #self.callstack, 1, -1 do
local this_ar = self.callstack[i];
self:_one_fun_return(this_ar.caller_info);
if this_ar.func == caller_info.func or this_ar.linedefined == caller_info.linedefined then
break;
end
end
end
end
function _profiler._one_fun_return(self,caller_info)
if #self.callstack <= 0 then
return;
end
local profile_return_start_Time = self.profile_start_Time;
local this_ar = table.remove(self.callstack,#self.callstack);
this_ar.clock_end = self.profile_start_Time
this_ar.this_time = this_ar.clock_end - this_ar.clock_start
- this_ar.proflier_time --减去自身call 和子函数call、return 的分析消耗时间
- this_ar.line_cost_time --减去自身函数内部的逐行分析消耗时间
-- CppLog("[one_fun_return]name:"..this_ar.fun_name..this_ar.linedefined)
-- Now, if we have a parent, update its call info...
if this_ar.parent_ar then
-- CppLog("[parent]name:"..this_ar.parent_ar.fun_name..this_ar.parent_ar.linedefined)
local funcStrKey = this_ar.fun_name.."_"..this_ar.linedefined;
this_ar.parent_ar.children[funcStrKey] =
(this_ar.parent_ar.children[funcStrKey] or 0) + 1
this_ar.parent_ar.children_time[funcStrKey] =
(this_ar.parent_ar.children_time[funcStrKey] or 0 ) +
this_ar.this_time
if this_ar.fun_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(this_ar.fun_name,this_ar.linedefined,this_ar.func)
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 = this_ar.caller_info
inforec.parent_info = ""
if this_ar.parent_ar then
inforec.parent_info = this_ar.parent_ar.source.." ["..this_ar.parent_ar.fun_name.."]:"..this_ar.parent_ar.linedefined
end
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
-- CppLog(this_ar.fun_name..this_ar.linedefined.." this_time:"..this_ar.this_time.." proflier_time:"..this_ar.proflier_time);
if this_ar.parent_ar then
local nowTime = os.clock();
this_ar.parent_ar.proflier_time = this_ar.parent_ar.proflier_time
+ this_ar.proflier_time --子函数调用的分析消耗
+ (nowTime - profile_return_start_Time) --这次 return 的分析耗时
this_ar.parent_ar.line_cost_time = this_ar.parent_ar.line_cost_time + this_ar.line_cost_time --传递子函数的逐行分析耗时
self.profile_start_Time = nowTime; --避免重复计算消耗
-- CppLog("[parent]"..this_ar.parent_ar.fun_name..this_ar.parent_ar.linedefined.." proflier_time:"..this_ar.parent_ar.proflier_time);
end
--fun return update currpos
self.currPos_ar = self.callstack[#self.callstack];
-- if self.currPos_ar then
-- CppLog("[setCurPos1] name:"..self.currPos_ar.fun_name..self.currPos_ar.linedefined.."["..self.currPos_ar.linedefined..","..self.currPos_ar.lastlinedefined.."] source:"..self.currPos_ar.source)
-- end
end
function _profiler._get_func_rec(self,funName,linedefined,func)
-- Find the function ref for 'func' (if force and not present, create one)
local ret = self.rawstats[funName.."_"..linedefined]
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 = {}
self.rawstats[funName.."_"..linedefined] = 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 )
-- table_print(self.rawstats)
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,true) .. " "
-- 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( "No."..i..string.rep( "-", 19 ) .. thisfuncname .. " [parent]" .. record.parent_info ..
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 ) .. "ms\n" )
outfile:write( "Time spent in children: " ..
string.format("%4.3f",record.anon_child_time+record.name_child_time) ..
"ms\n" )
local timeinself =
record.time - (record.anon_child_time + record.name_child_time)
outfile:write( "Time spent in self: " ..
string.format("%4.3f", timeinself) .. "ms\n" )
outfile:write( "Time spent per " .. terms.single .. ": " ..
string.format("%4.5f", record.time/record.count) ..
"ms/" .. terms.single .. "\n" )
outfile:write( "Time spent in self per "..terms.single..": " ..
string.format( "%4.5f", timeinself/record.count ) .. "ms/" ..
terms.single.."\n" )
-- Report on each child in the form
-- Child <funcname> called n times and took a.bs
local added_blank = 0
local childrenlist = {}
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
if record.children_time[k] ~= 0 then
local childrenInfo = {}
childrenInfo.str = "Child " .. self:_pretty_name(k) ..
string.rep( " ", 41-string.len(self:_pretty_name(k)) ) .. " " ..
terms.pastverb.." " .. string.format("%6d", v) .. " times. Took " ..
string.format("%4.2f", record.children_time[k] ) .. "ms\n"
childrenInfo.time = record.children_time[k];
table.insert(childrenlist,childrenInfo);
end
end
end
table.sort(childrenlist,function (a,b)
return a.time > b.time;
end)
outfile:write( "\n" )
for k, v in pairs(childrenlist) do
outfile:write(v.str);
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,bTitle)
-- 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
if bTitle then
name = name .. " Root"
end
if info.name then
name = name .." Fun:"..info.name;
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_call] = 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,
}
local function _list_table(tb, table_list, level)
local ret = ""
local indent = string.rep(" ", level*4)
for k, v in pairs(tb) do
local quo = type(k) == "string" and "\"" or ""
ret = ret .. indent .. "[" .. quo .. tostring(k) .. quo .. "] = "
if type(v) == "table" then
local t_name = table_list[v]
if t_name then
ret = ret .. tostring(v) .. " -- > [\"" .. t_name .. "\"]\n"
else
table_list[v] = tostring(k)
ret = ret .. "{\n"
ret = ret .. _list_table(v, table_list, level+1)
ret = ret .. indent .. "}\n"
end
elseif type(v) == "string" then
ret = ret .. "\"" .. tostring(v) .. "\"\n"
else
ret = ret .. tostring(v) .. ",\n"
end
end
local mt = getmetatable(tb)
if mt then
ret = ret .. "\n"
local t_name = table_list[mt]
ret = ret .. indent .. "<metatable> = "
if t_name then
ret = ret .. tostring(mt) .. " -- > [\"" .. t_name .. "\"]\n"
else
ret = ret .. "{\n"
ret = ret .. _list_table(mt, table_list, level+1)
ret = ret .. indent .. "}\n"
end
end
return ret
end
-------------------------------------------------------------------
-- Public functions
-------------------------------------------------------------------
function table_tostring(tb)
--print("table_tostring")
if type(tb) ~= "table" then
print("Sorry, it's not table, it is " .. type(tb) .. ".","table_Print")
end
local ret = " = {\n"
local table_list = {}
table_list[tb] = "root table"
ret = ret .. _list_table(tb, table_list, 1)
ret = ret .. "}"
return ret
end
function table_print(tb)
if tb == nil then
print("table_Print {}","table_Print")
return
end
if CppLog then
CppLog(tostring(tb) .. table_tostring(tb))
end
-- print(tostring(tb) .. table_tostring(tb))
end
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