Re: profiling multi threaded applications

You could set the thread priority to maximum for the thread you're 
interested in. Do it at the start of your profiling block - that will pretty 
much starve the other threads for the bit you want to profile - and then 
undo it at the end. 

This is, of course, assuming we're talking about a platform that allows such 
things.
 
--brian

On 7/20/05, Andras Balogh <[email protected]> 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 <http://www.feelingsoftware.com>
> >
> >
> >>-----Original Message-----
> >>From: [email protected]
> >>[mailto:[email protected]] On Behalf Of
> >>Andras Balogh
> >>Sent: Wednesday, July 20, 2005 10:36 AM
> >>To: [email protected]
> >>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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