[mapserver-dev] mapserver performance windows/linux

[Howard Butler]

Shark on OS X puts to shame just about every other profiler I've ever  
used.

On Sep 17, 2009, at 3:28 PM, Stephen Woodbridge wrote:

> Has anyone worked with valgrind profiling or callgrind, these tools  
> typically do not require that you recompile using the -pg option and  
> may return better profiling results. I use valgrind all the time for  
> memory checking, but have not use the profiling tools.
>
> -Steve W
>
> Andy Colson wrote:
>> I dont think this is a useful profile.  The program ran for 2.6  
>> seconds, and this profile says msClipPolylineRect took up 100% of  
>> the time, which it measured 758 calls with a total time of 0.01  
>> seconds.
>> So the profiler was able to account for 0.01 of 2.6 seconds.  I'm  
>> not sure what that means, but the numbers don't add up.
>> -Andy
>> JUDD.CHRISTOPHER wrote:
>>> Andy,
>>>
>>> That looks pretty close to the numbers that I am getting. Steve,  
>>> will that suffice for the profiling?  I guess it would be nice to
>>> look at the differences between ms4w 2.3.1 and 3 beta 7.
>>>
>>> I'd like to do whatever I can to help identify this as a bug and  
>>> try to
>>> get it fixed.
>>>
>>> Thanks,
>>> Chris
>>>
>>> -----Original Message-----
>>> From: Andy Colson [mailto:andy at squeakycode.net] Sent: Thursday,  
>>> September 17, 2009 3:27 PM
>>> To: JUDD.CHRISTOPHER
>>> Cc: Alan Boudreault; mapserver-dev at lists.osgeo.org
>>> Subject: Re: [mapserver-dev] mapserver performance windows/linux
>>>
>>> JUDD.CHRISTOPHER wrote:
>>>> That is right, I did find this same performance issue with 5.0, 5.2
>>> and
>>>> 5.4 on linux.
>>>>
>>>> I just tested ms4w_3.0_beta7 and it is taking about 3.7 seconds to
>>> draw
>>>> the same image that 2.3.1 did in 1.4 seconds.
>>>>
>>>> Someone else should probably do the same testing to make sure  
>>>> that I'm
>>>> not off base. How do I do the profiling?
>>>> Thanks for your help,
>>>> Chris
>>>>
>>>
>>> On Linux its easy.  recompile with -pg, then run it once which  
>>> will dump
>>>
>>> out a gmon.out, then use the gprof to view it.
>>>
>>> No idea on windows.
>>>
>>> I used shp2img because I dont have php script compiled.  I  
>>> downloaded your test set and changed the mapfile extent to match  
>>> what you had in the php script.
>>>
>>> shp2img takes 2.6 seconds to render, and my images came out a lot  
>>> like yours.  (I'm also using mapserver 5.6)
>>>
>>> I tried it with both gd and agg and it didnt seem to make a  
>>> difference.   But changing to ANGLE AUTO made it run in 0.8 seconds.
>>>
>>> Here are my gprof dumps.
>>>
>>> AGG, ANGLE FOLLOW:
>>>
>>> Flat profile:
>>>
>>> Each sample counts as 0.01 seconds.
>>>   %   cumulative   self              self     total
>>>  time   seconds   seconds    calls  ms/call  ms/call  name
>>> 100.00      0.01     0.01      758     0.01     0.01   
>>> msClipPolylineRect
>>>   0.00      0.01     0.00    82305     0.00     0.00  msRectOverlap
>>>   0.00      0.01     0.00    67590     0.00     0.00  
>>> intersectLabelPolygons
>>>   0.00      0.01     0.00    36963     0.00     0.00
>>> msIntersectSegments
>>>   0.00      0.01     0.00    32460     0.00     0.00  msGetBit
>>>   0.00      0.01     0.00    16988     0.00     0.00  msSHXReadSize
>>>
>>>
>>>
>>>
>>>
>>> AGG, ANGLE auto:
>>>
>>> Flat profile:
>>>
>>> Each sample counts as 0.01 seconds.
>>>  no time accumulated
>>>
>>>   %   cumulative   self              self     total
>>>  time   seconds   seconds    calls  Ts/call  Ts/call  name
>>>   0.00      0.00     0.00    98521     0.00     0.00  msRectOverlap
>>>   0.00      0.00     0.00    83806     0.00     0.00  
>>> intersectLabelPolygons
>>>   0.00      0.00     0.00    32460     0.00     0.00  msGetBit
>>>   0.00      0.00     0.00    16988     0.00     0.00  msSHXReadSize
>>>   0.00      0.00     0.00    15472     0.00     0.00   
>>> msSHXReadOffset
>>>   0.00      0.00     0.00    14715     0.00     0.00   
>>> msSHPReadBounds
>>>   0.00      0.00     0.00     4067     0.00     0.00  msFree
>>>
>>>
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