What is WDDM 1.3 in Win 8.1 Preview and why should I care?

Message boards : Number crunching : What is WDDM 1.3 in Win 8.1 Preview and why should I care?

To post messages, you must log in.

AuthorMessage
TBar
Volunteer tester

Send message
Joined: 22 May 99
Posts: 3056
Credit: 122,029,550
RAC: 88,606
United States
Message 1386479 - Posted: 1 Jul 2013, 16:12:46 UTC

I was looking around, trying to decide what would be best for this new AMD card that doesn't work in XP, and I ran across this,
Feature Highlights of the AMD Catalyst™ Windows® 8.1 Preview Driver: WDDM 1.3 driver model support for the following products...
There aren't many cards supported, so, you would think there was something special about it. Or maybe, it's just a lousy Preview driver...
I do have 'the card' in Windows '8.0' at present. I'm just wondering if I should try out the 8.1 Preview with the 'limited' driver support.
Decisions, decisions...

ID: 1386479 · Report as offensive
OzzFan
Volunteer tester
Avatar

Send message
Joined: 9 Apr 02
Posts: 15105
Credit: 45,179,811
RAC: 40,492
United States
Message 1386494 - Posted: 1 Jul 2013, 16:23:54 UTC - in response to Message 1386479.

These are the features in the new WDDM 1.3 standard:

http://msdn.microsoft.com/en-us/library/windows/hardware/dn265512(v=vs.85).aspx


  • Enumerating GPU engine capabilities
    An interface that's used to query a GPU node's engine capabilities.
  • Using cross-adapter resources in a hybrid system
    Describes how to handle resources that are shared between integrated and discrete GPUs.
  • YUV format ranges in Windows 8.1 Preview
    An interface that's used to signal user-mode display drivers that video inputs are either in the studio luminance range or in the extended range.
  • Wireless displays (Miracast)
    Describes how to enable wireless (Miracast) displays.
  • Multiplane overlay support
    Describes how to implement multiplane overlays.

ID: 1386494 · Report as offensive
TBar
Volunteer tester

Send message
Joined: 22 May 99
Posts: 3056
Credit: 122,029,550
RAC: 88,606
United States
Message 1386497 - Posted: 1 Jul 2013, 16:33:42 UTC - in response to Message 1386494.

So, will this supercharge SETI, or kill it stone cold dead? If you install a 7750 in XP with an older OpenCL supported card, reinstall OpenCL for the older card, every time an App queries OpenCL support, XP instantly reboots. Not even enough time for a BSOD...reboot. I'm just wondering what would happen with this driver and BOINC...

ID: 1386497 · Report as offensive
OzzFan
Volunteer tester
Avatar

Send message
Joined: 9 Apr 02
Posts: 15105
Credit: 45,179,811
RAC: 40,492
United States
Message 1386499 - Posted: 1 Jul 2013, 16:47:29 UTC - in response to Message 1386497.
Last modified: 1 Jul 2013, 16:50:07 UTC

WDDM specifies features a driver should support. This should be completely separate from OpenCL which is a different standard.

[Edited to add] If you want to make sure you still have OpenCL functionality, you may want to see if AMD has released a fully WDDM 1.3 / OpenCL complaint preview driver for Windows 8.1.

ID: 1386499 · Report as offensive
TBar
Volunteer tester

Send message
Joined: 22 May 99
Posts: 3056
Credit: 122,029,550
RAC: 88,606
United States
Message 1386512 - Posted: 1 Jul 2013, 17:06:43 UTC - in response to Message 1386499.

It says it supports OpenCL;

Support for AMD Features, including:
AMD Eyefinity
OpenCL
OpenGL
UVD
AMD Dual Graphics/AMD CrossFire™ Technology
AMD Overdrive™
AMD Catalyst Control Center/Vision Engine Control Center

Maybe I'll give it a try in a few days once I recover from my bouts with the 7750 in Linux and OSX on a Mac. Hopefully, someone else would have tried the 8.1 driver by then :-)

ID: 1386512 · Report as offensive
Profile Raistmer
Volunteer developer
Volunteer tester
Avatar

Send message
Joined: 16 Jun 01
Posts: 5403
Credit: 66,321,262
RAC: 12,512
Russia
Message 1386644 - Posted: 1 Jul 2013, 23:30:35 UTC

The biggest remaining issue with ATi OpenCL drivers - CPU availability required.
Even with quite low CPU usage CPU core should be freed to load GPU fully.
Cause we see such behavior not under all drivers (for same app) this could change in future driver revisions.
So, worth to try and see how app behaves under new driver and fully loaded CPU.


SETI apps news
We're not gonna fight them. We're gonna transcend them.

ID: 1386644 · Report as offensive
Profile Mike
Volunteer tester
Avatar

Send message
Joined: 17 Feb 01
Posts: 29557
Credit: 49,003,764
RAC: 16,851
Germany
Message 1386797 - Posted: 2 Jul 2013, 12:25:26 UTC

I just ran a bench on win 8.1 preview using 13.4 drivers.
Works fine w/o problems.


With each crime and every kindness we birth our future.

ID: 1386797 · Report as offensive
Profile Raistmer
Volunteer developer
Volunteer tester
Avatar

Send message
Joined: 16 Jun 01
Posts: 5403
Credit: 66,321,262
RAC: 12,512
Russia
Message 1386801 - Posted: 2 Jul 2013, 13:16:20 UTC - in response to Message 1386797.

I just ran a bench on win 8.1 preview using 13.4 drivers.
Works fine w/o problems.

and CPU usage?
SETI apps news
We're not gonna fight them. We're gonna transcend them.

ID: 1386801 · Report as offensive
Profile Mike
Volunteer tester
Avatar

Send message
Joined: 17 Feb 01
Posts: 29557
Credit: 49,003,764
RAC: 16,851
Germany
Message 1386889 - Posted: 2 Jul 2013, 21:22:02 UTC - in response to Message 1386801.

I just ran a bench on win 8.1 preview using 13.4 drivers.
Works fine w/o problems.

and CPU usage?


I posted the complete bench at Lunatics.

With each crime and every kindness we birth our future.

ID: 1386889 · Report as offensive

Message boards : Number crunching : What is WDDM 1.3 in Win 8.1 Preview and why should I care?


 
©2016 University of California
 
SETI@home and Astropulse are funded by grants from the National Science Foundation, NASA, and donations from SETI@home volunteers. AstroPulse is funded in part by the NSF through grant AST-0307956.