Angus Dorbie (dorbie++at++multipass.engr.sgi.com)
Thu, 28 Aug 1997 20:04:35 -0700
Date: Thu, 28 Aug 1997 19:55:15 -0700
From: willmc++at++vmaster (Will McGovern)
To: dorbie (Angus Dorbie)
Subject: Re: DIVO
Cc: vince++at++vmaster
Hi Ran,
I just reproduced the problem you are having... I was also getting
approx 3ms for each dmBufferFree. The cause of this is cache flushing
which occurs if you have DM_CACHEABLE set the DM_TRUE. If you turn
off the cachability of the buffer pool the time drops to ~0.05ms :-)
The code of relevance is :
dmBufferSetPoolDefaults( paramList, num, size, DM_FALSE, DM_TRUE );
^^^^^^^^
This will solve your problem...
- Will
> Hi,
>
> Has anyone used DIVO on ONYX2 yet ? I've tried reading a video into
> texture using DIVO. The video is read using the DMBuffer mechanism into
> memory, and then glTexSubImage-ed into texture memory. The weird thing
> is that the dmBufferFree() function, which is supposed to just free my
> dmbuffer, is taking 2.5 milisec. This is way too much for swaping
> pointers. Solutions, anyone ?
>
> Thanks
> Ran
-- Will McGovern Email willmc++at++sgi.com Applied Engineering Phone +1.415.9337069 Advanced Entertainment Systems FAX +1.415.9327069 Silicon Graphics Inc."Love your enemies just in case your friends turn out to be a pack of bastards."
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