Re: [GD-General] profiling multi threaded applications

[Andras B. <and...@gm...>]

The platform is Win32, and I'd prefer using an embedded profiler in the 
engine, not an external one. I can play around with the thread 
priorities and such, I just hoped that there is a "generic" solution to 
this problem that I missed..

Thanks,

Andras

Mick West wrote:
> Thread Profilers do exist, (not that I've used one):
> 
> http://www.intel.com/cd/software/products/asmo-na/eng/threading/tp/index.htm 
> 
> 
> What platform is this for?
> 
> Mick.
> 
> 
> Andras Balogh wrote:
> 
>> Pretending that this is not an option, are there any other possibilities?
>>
>>
>> Christian Laforte wrote:
>>
>>> If possible, design your architecture so that your threads can work in a
>>> lockstep mode, with one central mutex controlling which thread is 
>>> running at
>>> any given moment. That way you can at least get a partial profile and
>>> optimize each thread individually.
>>>
>>> This type of design can also prove very useful to debug deadlocks.
>>>
>>> Hope that helps a bit,
>>>
>>> Christian Laforte
>>> www.feelingsoftware.com
>>>
>>>> -----Original Message-----
>>>> From: gam...@li...
>>>> [mailto:gam...@li...] On Behalf Of
>>>> Andras Balogh
>>>> Sent: Wednesday, July 20, 2005 10:36 AM
>>>> To: gam...@li...
>>>> Subject: [GD-General] profiling multi threaded applications
>>>>
>>>> I was about to add a simple profiler into our engine, but I've just
>>>> realized that the usual hierarchical profiler that measures the time 
>>>> for
>>>> a chunk of code won't cut it, in a multithreaded application.
>>>>
>>>> I understand that even when I have a single threaded app, there are
>>>> usually several other applications are running in the background, but
>>>> mostly they are all idle, so it's just noise. But in this case, I would
>>>> have multiple, heavily working threads. If the OS switches back and
>>>> forth between these threads all the time, then how is it possible to
>>>> make accurate, or even just usable measurements??
>>>>
>>>> Thanks,
>>>>
>>>> Andras