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On 6/15/11 12:50 PM, Bing Li wrote:
> Jens,
>
> Thanks so much for your suggestions!
>
> I wonder why it works fine according to Activity Monitor if such a huge leak
> exists. The consumed memory in the Activity Monitor is stable and much
> smaller unless some threads are created at a high concurrent moment. After
> the threads are dead, the consumed memory becomes stable and small. I feel
> weird for this.
Honestly, I feel like you are not listening to the excellent responses
people are giving you.
1) Activity Monitor is not a profiling tool. Don't use it as such. Use
Leaks/Allocations, maybe with some heapshot analysis thrown in as I
believe I mentioned a while back.
2) Analyze your code with the Clang static analyzer ("Build & Analyze").
This will shake out many common memory issues (and more).
3) Recognize that posting snippets of the code that you THINK might be
responsible for a leak does not mean that people on the list can
actually help you find it. For example, even if you are doing
everything completely properly inside a function, if that function
returns some object, the calling code can still leak that object.
4) It seems as if much of your code is multi-threaded. All else being
equal, this makes such problems even harder to debug. If I were having
such serious issues, I would probably spend some time trying to get the
task to work on the main thread and only once that is thoroughly
debugged would I break it up across threads. (This won't work for every
type of problem, but if it can work for you, I'd do it.)
5) As others have commented, there is substantial evidence that your
code probably has issues other than memory management. If you are, for
example, smashing the stack in your C code, all bets are off and you
really need to fix that first.
It's been so long since you first started posting that I've forgotten
what you are trying to do. You are communicating in a high level format
(XML), yet all your code seems to concern very low level network
behaviors (opening sockets, reading bytes, et cetera). I wonder whether
you are over-engineering all this. What is your goal?
- --
Conrad Shultz
Synthetiq Solutions
www.synthetiqsolutions.com
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