OpenCL* for CPU
Ask questions and share information on Intel® SDK for OpenCL™ Applications and OpenCL™ implementations for Intel® CPU.
Announcements
This forum covers OpenCL* for CPU only. OpenCL* for GPU questions can be asked in the GPU Compute Software forum. Intel® FPGA SDK for OpenCL™ questions can be ask in the FPGA Intel® High Level Design forum.
1719 Discussions

behavior of Intel GPU cache

Fu_J_Intel
Employee
‎06-02-2016 10:28 AM
468 Views

Hi experts,

I wonder how Intel GPU manages its caches? For example,  is tiled format (of an image) more friendly to cache than linear format?

thanks,

Jeffrey

0 Kudos

Link Copied

1 Reply
Robert_I_Intel
Employee
‎06-06-2016 06:25 PM
468 Views

Hi Jeffrey,

Tiled format (images) read accesses go thru the sampler, which has its own L1 and L2 incoherent caches (initially, go thru L3$ and LLC$). Linear format accesses (buffers) go thru L3$ and LLC$. So that's the biggest difference.

0 Kudos
Copy link
Reply

Community support is provided during standard business hours (Monday to Friday 7AM - 5PM PST). Other contact methods are available here.

Intel does not verify all solutions, including but not limited to any file transfers that may appear in this community. Accordingly, Intel disclaims all express and implied warranties, including without limitation, the implied warranties of merchantability, fitness for a particular purpose, and non-infringement, as well as any warranty arising from course of performance, course of dealing, or usage in trade.

For more complete information about compiler optimizations, see our Optimization Notice.