[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: Hyperthreaded Decompressor

Subject: Re: Hyperthreaded Decompressor
From: Alex Telitsine <email@hidden>
Date: Thu, 25 Mar 2004 00:57:03 -0800

On Mar 24, 2004, at 10:01 PM, email@hidden wrote:

. We are finding that our SheerVideo decoders, which use the Base Decompressor, hang when and only when hyperthreading is turned on. Ordinary multithreaded and multiprocessor environments do not exhibit this problem.

Are you using Intel OpenMP (Intel C/C++) code in codec? I saw it is causing QuickTime to crash.
Does it hang inside your codec or QuickTime?
If it is you probably should use log files to pinpoint where it happens.
Intel VTune could be helpful as well, to pinpoint any race conditions
in multithreaded code.

Alex Telitsine
Streambox Inc.
_______________________________________________
quicktime-api mailing list | email@hidden
Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/quicktime-api
Do not post admin requests to the list. They will be ignored.

Follow-Ups:
- Re: Hyperthreaded Decompressor
  - From: email@hidden

References:
	>Capture images from a sequence grabber in planar format (From: Bing-Chang Lai <email@hidden>)
	>Hyperthreaded Decompressor (From: email@hidden)
	>Re: Hyperthreaded Decompressor (From: Seth Porter <email@hidden>)
	>Re: Hyperthreaded Decompressor (From: email@hidden)

Prev by Date: Re: Hyperthreaded Decompressor
Next by Date: QT 6.5 crash in GetDIBFromPICT
Previous by thread: Re: Hyperthreaded Decompressor
Next by thread: Re: Hyperthreaded Decompressor
Index(es):
- Date
- Thread

Home