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cjb80
Journeyman III
‎12-10-2014 10:27 AM

GPGPU Benefit with 14.12 Driver?

Should we be expecting any sort of performance benefit with OpenCL applications when using the new 14.12 driver?  (Particularly in the Linux environment)  There is a bunch of marketing out there about improved performance, but nothing mentioned OpenCL except for the OpenCL 2.0 support...

Thanks,

Chris

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3 Replies
jtrudeau
Staff
Staff
‎12-10-2014 10:57 AM

You may be asking.... is there a performance improvement just from the new driver, without doing anything else? I don't know, but I can start asking around, see if I can get some light on that.

Is there potential improvement, if you take advantage of OpenCL 2 features? For sure.

One blog we have up has comparative benchmarks: http://developer.amd.com/community/blog/2014/10/24/opencl-2-shared-virtual-memory/

a binary tree search of 5M nodes took 18 milliseconds using SVM vs. >310 milliseconds without.

There might be some benchmark data in the other OpenCL 2.0 blogs, but if so it has slipped my mind.

cjb80
In response to jtrudeau
Journeyman III
‎12-10-2014 11:00 AM

Yeah, please ask around.  I am using OpenCL 1.2 as development started several months ago and we don't have the budget to rewrite everything at the moment!

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nan
Adept II
‎12-10-2014 07:48 PM

Hi,

all OpenCL 1.2 application that I've tested with Catalyst 14.12 run slower than with Catalyst 14.9 (20%-50%). The performance of Catalyst 14.12 is comparable to the OpenCL 2.0 beta driver. Hopefully the performance regressions will be fixed in the future by AMD.

-- NaN