What happens if you remove the "isCancelled" checks?
How do you create your operation queue?
What is the max concurrent operation count of the queue? If
NSOperationQueueDefaultMaxConcurrentOperationCount, what happens if you set it
to (processorCount) instead?
When you take a CPU sample of the process, what are your worker threads mainly
doing (work, or being stuck)?
Joar
On 4 dec 2012, at 23:46, Gerriet M. Denkmann <gerr...@mdenkmann.de> wrote:
>
> On 5 Dec 2012, at 01:29, Jens Alfke <j...@mooseyard.com> wrote:
>
>>
>> On Dec 4, 2012, at 3:48 AM, Gerriet M. Denkmann <gerr...@mdenkmann.de> wrote:
>>
>>> My app creates lots of MyOperations (subclass of NSOperation) and puts them
>>> into an NSOperationQueue.
>>> I would expect that the app thus remains responsive, but sometimes it is
>>> not.
>
>
> I made a test project with this Operation:
>
> @implementation GmdOperationBasis
> - (void)main
> {
> if ( [ self isCancelled ] ) return;
> double sum = 8;
> for( NSUInteger i = 0; i < 133833333; i++ )
> {
> if ( [ self isCancelled ] ) return;
> double j = (double)i;
> sum += sqrt(j);
> };
> }
> @end
>
> When I add less than 8 operations to the queue, all is fine.
>
> When I add 8 or more operations to NSOperationQueue (using
> NSOperationQueueDefaultMaxConcurrentOperationCount concurrent ops) ,
> - then switch to some other app,
> - then try to make my app active again, I get a beach-ball.
>
> My app becomes responsive again, when all operations have finished.
>
> processorCount = 8 (as reported by NSProcessInfo).
>
> 10.8.2. Xcode 4.5.2.
>
>
> Kind regards,
>
> Gerriet.
>
>
>
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