Re: [GD-General] profiling multi threaded applications

[Mick W. <de...@mi...>]

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
>>
>
>
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