Does HD5300 support the 'new globally coherent memory type' mentioned in Gen8.pdf. How does application use it?

laura_t_ · ‎03-02-2015

Hi,

I have a HD5300 platform at hand.

Does HD5300 support the 'new globally coherent memory type' mentioned in 'Compute Architecture of Intel Processor Graphics Gen8.pdf'?

If yes, then how to write the application to take advantage of this coherent memory type?

Robert_I_Intel · ‎03-02-2015

Laura,

The document talks about fine grained buffer SVM. Unfortunately, HD5300 supports only Coarse grained buffer SVM. The globally coherent memory is supported on the HD5500+ chips with January 15, 2015 drivers. After creating an Intel OpenCL 2.0 device, you should be able to query for and find:

CL_DEVICE_SVM_COARSE_GRAIN_BUFFER
CL_DEVICE_SVM_FINE_GRAIN_BUFFER
CL_DEVICE_SVM_FINE_GRAIN_SYSTEM
CL_DEVICE_SVM_ATOMICS

Could you run CPU-Z and provide a CPU and Graphics tabs screenshots? If you have E0/F0 stepping, fine grained SVM might work with the latest driver.

Robert