Re: Too many threads?
Re: Too many threads?
- Subject: Re: Too many threads?
- From: "Stephen J. Butler" <email@hidden>
- Date: Wed, 08 May 2013 19:28:09 -0500
If that's a POSIX error code it's reporting, then 35 maps to either EAGAIN
or EWOULDBLOCK.
I thought it might be you're hitting the max file limit (256 by default)
but that would cause open() to return EMFILE. However, pthread_create() can
return EAGAIN, and with 2000+ threads you might be hitting this limit:
"The system lacked the necessary resources to create another thread, or the
system-imposed limit on the total number of threads in a process
[PTHREAD_THREADS_MAX] would be exceeded."
On Wed, May 8, 2013 at 5:03 PM, Rainer Standke <email@hidden> wrote:
> Hello all,
>
> I have an app that's rendering QuickTime movies based on AVFoundation.
> It's multi-threaded via GCD, and has up 6 renders going at the same time.
>
> I am getting un-explained crashes, or at least I can't explain them. The
> crashing thread is usually something deep in AVFoundation. I get things
> like this one: "AVAssetWriterStatusFailed - An unknown error occurred (35)
> - The operation could not be completed"
>
> When the crashes happen the has something like 2000 threads going,
> according to Activity Monitor, and all the Free RAM is used up.
>
> As a crutch I have implemented a throttling mechanism that basically waits
> a number of seconds before starting the next render - but it feels kludgy,
> and the app can still crash.
>
> My question is, besides properly releasing objects etc, is there any thing
> I can do to keep the number of threads down, or cause the system to spin
> down threads that aren't needed any more?
>
> Thanks for any pointers,
>
> Rainer
> _______________________________________________
>
> Cocoa-dev mailing list (email@hidden)
>
> Please do not post admin requests or moderator comments to the list.
> Contact the moderators at cocoa-dev-admins(at)lists.apple.com
>
> Help/Unsubscribe/Update your Subscription:
>
>
> This email sent to email@hidden
>
_______________________________________________
Cocoa-dev mailing list (email@hidden)
Please do not post admin requests or moderator comments to the list.
Contact the moderators at cocoa-dev-admins(at)lists.apple.com
Help/Unsubscribe/Update your Subscription:
This email sent to email@hidden