Comparing OpenCL* Kernel Performance with Performance of Native Code

When comparing OpenCL* kernel performance with native code (for example, C or Intel® Streaming SIMD Extensions (Intel® SSE) intrinsic), make sure that both versions are as similar as possible:

See Also


Getting Credible Performance Numbers (suggested next topic)
Considering native_ Versions of Math Built-Ins
Related Documents: “Working with the -cl-fast-relaxed-math Flag” section of the User's Guide
The OpenCL* 1.1 Specification at http://www.khronos.org portal [PDF]
Overview Presentations of the OpenCL* Standard at http://www.khronos.org portal [Online Article]
Optimization Notice

Intel's compilers may or may not optimize to the same degree for non-Intel microprocessors for optimizations that are not unique to Intel microprocessors. These optimizations include SSE2, SSE3, and SSSE3 instruction sets and other optimizations. Intel does not guarantee the availability, functionality, or effectiveness of any optimization on microprocessors not manufactured by Intel. Microprocessor-dependent optimizations in this product are intended for use with Intel microprocessors. Certain optimizations not specific to Intel microarchitecture are reserved for Intel microprocessors. Please refer to the applicable product User and Reference Guides for more information regarding the specific instruction sets covered by this notice.

Notice revision #20110804


Submit feedback on this help topic

Copyright © 2010-2012, Intel Corporation. All rights reserved.